*** EFM32 branch ***

1. Update the copyright information
 - 2009 => 2011
2. Add external oscillator configuration routine in "rt_hw_board_init()"
 - Before, it is set by default frequency, 32MHz
 - Now it can be set by user specified frequency
3. Add ADC and ACMP (analog comparator) drivers
4. Clarify the MCU and target board define in "rtconfig.py"

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1296 bbd45198-f89e-11dd-88c7-29a3b14d5316

bsp/efm32/SConscript

@@ -3,13 +3,13 @@ Import('RTT_ROOT')
 from building import *
 
 src_bsp = ['application.c', 'startup.c', 'board.c']
-src_drv = ['drv_dma.c', 'drv_rtc.c', 'drv_usart.c', 'drv_iic.c', 'drv_timer.c']
-src_dev = ['dev_led.c']
+src_drv = ['drv_dma.c', 'drv_rtc.c', 'drv_adc.c', 'drv_acmp.c', 'drv_usart.c', 'drv_iic.c', 'drv_timer.c']
+src_dev = ['dev_misc.c', 'dev_led.c']
 src_hdl = ['hdl_interrupt.c']
 
 src = src_bsp + src_drv + src_dev + src_hdl
 CPPPATH = [RTT_ROOT + '/bsp/efm32']
-CPPDEFINES = ['USE_STDPERIPH_DRIVER', rtconfig.EFM32_TYPE]
+CPPDEFINES = ['USE_STDPERIPH_DRIVER', rtconfig.EFM32_BOARD, rtconfig.EFM32_TYPE]
 group = DefineGroup('Startup', src, depend = [''], CPPPATH = CPPPATH, CPPDEFINES = CPPDEFINES)
 
 Return('group')

bsp/efm32/application.c

 /******************************************************************//**
  * @file 		application.c
  * @brief 	application tasks
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	Bernard, onelife
  * @version 	0.4 beta
  **********************************************************************
@@ -68,7 +68,18 @@ void rt_led_thread_entry(void* parameter)
 int rt_application_init()
 {
 	rt_thread_t led_thread;
-	rt_thread_t test_thread;
+
+	/* Initialize all device drivers (dev_?.c) */
+	if (rt_hw_led_init() != RT_EOK)
+	{
+		rt_kprintf("*** Failed to initialize LED driver!");
+		while(1); //Or do something?
+	}
+	if (rt_hw_misc_init() != RT_EOK)
+	{
+		rt_kprintf("*** Failed to miscellaneous driver!");
+		while(1); //Or do something?
+	}
 
 #if (RT_THREAD_PRIORITY_MAX == 32)
 	led_thread = rt_thread_create(

bsp/efm32/board.c

 /******************************************************************//**
  * @file 		board.c
  * @brief 	USART driver of RT-Thread RTOS for EFM32
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	onelife
  * @version 	0.4 beta
  **********************************************************************
@@ -192,6 +192,9 @@ void rt_hw_board_init(void)
 	/* NVIC Configuration */
 	NVIC_Configuration();
 
+	/* Configure external oscillator */
+	SystemHFXOClockSet(EFM32_HFXO_FREQUENCY);
+	
 	/* Configure the SysTick */
 	SysTick_Configuration();	
 }
@@ -215,23 +218,24 @@ void rt_hw_driver_init(void)
 	/* Enabling clock to the interface of the low energy modules */
 	CMU_ClockEnable(cmuClock_CORELE, true);
 
-	/* Initialize TIMER */
-	//rt_hw_timer_init();
-
 	/* Initialize DMA */
 	rt_hw_dma_init();
 
+	/* Initialize USART */
+	rt_hw_usart_init();
+
 	/* Initialize Timer */
 	rt_hw_timer_init();
 
-	/* Initialize USART */
-	rt_hw_usart_init();
+	/* Initialize ADC */
+	rt_hw_adc_init();
+
+	/* Initialize ACMP */
+	rt_hw_acmp_init();
 	
 	/* Initialize IIC */
 	rt_hw_iic_init();
 
-	rt_hw_led_init();
-	
 	rt_console_set_device(CONSOLE_DEVICE);
 }
 

bsp/efm32/board.h

 /******************************************************************//**
  * @file 		drv_dma.h
  * @brief 	USART driver of RT-Thread RTOS for EFM32
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	onelife
  * @version 	0.4 beta
  **********************************************************************
@@ -17,9 +17,8 @@
 #define __BOARD_H__
 
 #if defined(EFM32G890F128)
-#define EFM32_G890_STK
 #elif defined(EFM32G290F128)
-#define EFM32_G290_DK
+#elif defined(EFM32G230F128)
 #else
 #error Unknown MCU type 
 #endif
@@ -30,9 +29,11 @@
 #include <efm32_cmu.h>
 #include <efm32_rmu.h>
 #include <efm32_dma.h>
+#include <efm32_rtc.h>
 #include <efm32_timer.h>
 #include <efm32_gpio.h>
-#include <efm32_rtc.h>
+#include <efm32_acmp.h>
+#include <efm32_adc.h>
 #include <efm32_usart.h>
 #include <efm32_i2c.h>
 
@@ -51,21 +52,26 @@ extern rt_uint32_t rt_system_status;
 #define EFM32_NO_OFFSET			(-1)
 #define EFM32_NO_POINTER		(RT_NULL)
 
+#define EFM32_SRAM_END 			(RAM_MEM_BASE + SRAM_SIZE)
 
-#define HFXO_FREQUENCY 			(32000000)
-#define UART_PERCLK_FREQUENCY	HFXO_FREQUENCY
-#define UART_BAUDRATE			(115200)
-#define SERIAL_RX_BUFFER_SIZE	(64)
-
-#define IIC_RX_BUFFER_SIZE		(32)
+#define EFM32_BASE_PRI_DEFAULT 	(0x0UL << 5)
+#define EFM32_IRQ_PRI_DEFAULT 	(0x4UL << 5)
 
+#if (defined(EFM32_G890_STK) || defined(EFM32_G290_DK))
+#define EFM32_HFXO_FREQUENCY 	(32000000)
+#else
+#define EFM32_HFXO_FREQUENCY	(00000000)
+#endif
 
+#define UART_BAUDRATE			(115200)
 
-#define EFM32_SRAM_END 			(RAM_MEM_BASE + SRAM_SIZE)
+#define SERIAL_RX_BUFFER_SIZE	(64)
 
-#define EFM32_BASE_PRI_DEFAULT 	(0x0UL << 5)
-#define EFM32_IRQ_PRI_DEFAULT 	(0x4UL << 5)
+#define IIC_RX_BUFFER_SIZE		(32)
 
+#define ADC_INIT_REF			adcRef2V5
+#define ADC_INIT_CH 			adcSingleInpCh5
+#define ADC_CONVERT_FREQUENCY 	(7000000)
 
 #if (RT_CONSOLE_DEVICE == 0x0UL)
 #define CONSOLE_DEVICE 			RT_USART0_NAME
@@ -77,9 +83,14 @@ extern rt_uint32_t rt_system_status;
 #define CONSOLE_DEVICE 			"no"
 #endif
 
-#define RT_DEVICE_CTRL_USART    (0x04)		/*!< USART control */
-#define RT_DEVICE_CTRL_IIC	    (0x08)		/*!< IIC control */
-#define RT_DEVICE_CTRL_TIMER    (0x10)		/*!< Timer control */
+/*! fixme: move the following define to Rtdef.h */
+#define RT_DEVICE_CTRL_USART_RBUFFER	(0xF1)		/*!< set USART rx buffer */
+#define RT_DEVICE_CTRL_IIC_SETTING		(0xF2)		/*!< change IIC setting */
+#define RT_DEVICE_CTRL_TIMER_PERIOD		(0xF3)		/*!< set Timer timeout period */
+#define RT_DEVICE_CTRL_ADC_MODE			(0xF4)		/*!< change ADC mode */
+#define RT_DEVICE_CTRL_ADC_RESULT		(0xF5)		/*!< get ADC result */
+#define RT_DEVICE_CTRL_ACMP_INIT		(0xF6)		/*!< Initialize ACMP */
+#define RT_DEVICE_CTRL_ACMP_OUTPUT		(0xF7)		/*!< get ACMP output */
 
 /* Exported functions --------------------------------------------------------- */
 void rt_hw_board_init(void);

bsp/efm32/dev_led.c

 /******************************************************************//**
  * @file 		dev_led.c
  * @brief 	LED driver of RT-Thread RTOS for EFM32
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	Bernard, onelife
  * @version 	0.4 beta
  **********************************************************************
@@ -111,8 +111,10 @@ rt_uint8_t rt_hw_led_state(rt_uint8_t num)
  *
  * @note
  *
+ * @return
+ *	 Error code
  *********************************************************************/
-void rt_hw_led_init(void)
+rt_err_t rt_hw_led_init(void)
 {
 	rt_uint8_t i;
 		
@@ -125,6 +127,8 @@ void rt_hw_led_init(void)
 			gpioModePushPull,
 			0);
 	}
+
+	return RT_EOK;
 }
 
 /*********************************************************************

bsp/efm32/dev_led.h

 /******************************************************************//**
  * @file 		dev_led.h
  * @brief 	LED driver of RT-Thread RTOS for EFM32
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	Bernard, onelife
  * @version 	0.4 beta
  **********************************************************************
@@ -38,7 +38,7 @@
 #endif
 
 /* Exported functions --------------------------------------------------------- */
-void rt_hw_led_init(void);
+rt_err_t rt_hw_led_init(void);
 void rt_hw_led_on(rt_uint8_t num);
 void rt_hw_led_off(rt_uint8_t num);
 void rt_hw_led_toggle(rt_uint8_t num);

bsp/efm32/dev_misc.c

+/******************************************************************//**
+ * @file 		dev_misc.c
+ * @brief 	Miscellaneous drivers of RT-Thread RTOS for EFM32
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
+ * @author 	onelife
+ * @version 	0.4 beta
+ **********************************************************************
+ * @section License
+ * The license and distribution terms for this file may be found in the file LICENSE in this 
+ * distribution or at http://www.rt-thread.org/license/LICENSE
+ **********************************************************************
+ * @section Change Logs
+ * Date			Author		Notes
+ * 2011-02-22	onelife		Initial creation for EFM32
+ *********************************************************************/
+
+/******************************************************************//**
+ * @addtogroup efm32
+ * @{
+*********************************************************************/
+
+/* Includes -------------------------------------------------------------------*/
+#include "board.h"
+#include "drv_adc.h"
+
+/* Private typedef -------------------------------------------------------------*/
+/* Private define --------------------------------------------------------------*/
+/* Private macro --------------------------------------------------------------*/
+/* Private constants -----------------------------------------------------------*/
+static rt_device_t adc0;
+static struct efm32_adc_control_t control = {ADC_MODE_SINGLE};
+
+/* Private variables ------------------------------------------------------------*/
+/* Private function prototypes ---------------------------------------------------*/
+rt_int32_t efm32_misc_getCelsius(rt_uint32_t adcSample);
+
+/* Private functions ------------------------------------------------------------*/
+/******************************************************************//**
+ * @brief
+ *   Get current temperature value in degree celsius
+ *
+ * @details
+ *
+ * @note
+ *
+ * @return
+ *   Temperature value (signed integer) in degree celsius times 100
+ *
+ *********************************************************************/
+rt_int32_t rt_hw_get_temp(void)
+{
+	ADC_InitSingle_TypeDef 	singleInit = ADC_INITSINGLE_DEFAULT;
+	rt_uint32_t 			temp;
+
+	/* Set input to temperature sensor. Acquisition time must be 256 cycles. Reference must 
+	    be 1.25V */
+	singleInit.acqTime 		= adcAcqTime32;
+	singleInit.reference 	= adcRef1V25;
+	singleInit.input 		= adcSingleInpTemp;
+
+	control.singleInit 		= &singleInit;
+	adc0->control(adc0, RT_DEVICE_CTRL_ADC_MODE, &control);
+	adc0->control(adc0, RT_DEVICE_CTRL_RESUME, EFM32_NO_POINTER);
+	adc0->control(adc0, RT_DEVICE_CTRL_ADC_RESULT, &temp);
+
+	return efm32_misc_getCelsius(temp);
+}
+
+/******************************************************************//**
+ * @brief
+ *   Get current VDD value in volt
+ *
+ * @details
+ *
+ * @note
+ *
+ * @return
+ *   VDD value (unsigned integer) in volt times 100
+ *
+ *********************************************************************/
+rt_uint32_t rt_hw_get_vdd(void)
+{
+	ADC_InitSingle_TypeDef 	singleInit = ADC_INITSINGLE_DEFAULT;
+	rt_uint32_t 			vdd;
+
+	/* Set input to temperature sensor. Reference must be 1.25V */
+	singleInit.acqTime 		= adcAcqTime32;
+	singleInit.reference 	= adcRef1V25;
+	singleInit.input 		= adcSingleInpVDDDiv3;
+
+	control.singleInit 		= &singleInit;
+	adc0->control(adc0, RT_DEVICE_CTRL_ADC_MODE, &control);
+	adc0->control(adc0, RT_DEVICE_CTRL_RESUME, EFM32_NO_POINTER);
+	adc0->control(adc0, RT_DEVICE_CTRL_ADC_RESULT, &vdd);
+
+	return (vdd * 125 * 3) / 4096;
+}
+
+/******************************************************************//**
+ * @brief
+ *   Initialize all the miscellaneous drivers
+ *
+ * @details
+ *
+ * @note
+ *
+ * @return
+ *	 Error code
+ *********************************************************************/
+rt_err_t rt_hw_misc_init(void)
+{
+	adc0 = rt_device_find(RT_ADC0_NAME);
+	if (adc0 == RT_NULL)
+	{
+		rt_kprintf("Batt error: Can't find device: %s!\n", RT_ADC0_NAME);
+		
+		goto MISC_INIT_ERROR;
+	}
+
+	return RT_EOK;
+
+
+MISC_INIT_ERROR:
+#ifdef RT_MISC_DEBUG
+	rt_kprintf("Misc error: Init failed!\n");
+#endif
+
+	return -RT_ERROR;
+
+}
+
+/**************************************************************************//**
+ * @brief 
+ *   Convert ADC result to degree celsius.
+ *
+ * @details
+ *
+ * @note 
+ *   See section 2.3.4 in the reference manual for details on this calculatoin
+ *
+ * @param adcResult 
+ *   Raw value from ADC to be converted to celsius
+ *
+ * @return 
+ *   The temperature value (signed integer) in degrees celsius times 100
+ *
+ *****************************************************************************/
+rt_int32_t efm32_misc_getCelsius(rt_uint32_t adcResult)
+{
+	/* Factory calibration temperature from device information page. */
+	rt_int32_t cal_temp 	= ((DEVINFO->CAL & _DEVINFO_CAL_TEMP_MASK) \
+								>> _DEVINFO_CAL_TEMP_SHIFT) * 100;
+
+	/* Factory calibration value from device information page. */
+	rt_int32_t cal_value	= ((DEVINFO->ADC0CAL2 & _DEVINFO_ADC0CAL2_TEMP1V25_MASK) \
+								>> _DEVINFO_ADC0CAL2_TEMP1V25_SHIFT) * 10000;
+
+	/* Temperature gradient (from datasheet) in (ADC unit / degree celsius * 100) */
+	rt_int32_t t_grad 		= -385;
+
+	return (cal_temp - (cal_value - (rt_int32_t)adcResult * 10000) / t_grad);
+}
+
+/*********************************************************************
+* 	Export to FINSH
+*********************************************************************/
+#ifdef RT_USING_FINSH
+#include <finsh.h>
+
+void list_temp(void)
+{
+	rt_int32_t temp = rt_hw_get_temp();
+
+	rt_kprintf("Temperature is %2d.%02d C\n", temp / 100, temp % 100);
+}
+FINSH_FUNCTION_EXPORT(list_temp, list current temperature value.)
+
+void list_vdd(void)
+{
+	rt_uint32_t vdd = rt_hw_get_vdd();
+	
+	rt_kprintf("VDD is %1d.%02d V\n", vdd / 100, vdd % 100);
+}
+FINSH_FUNCTION_EXPORT(list_vdd, list current VDD value.)
+
+#endif
+
+/******************************************************************//**
+ * @}
+*********************************************************************/

bsp/efm32/dev_misc.h

+/******************************************************************//**
+ * @file 		dev_misc.h
+ * @brief 	Miscellaneous drivers of RT-Thread RTOS for EFM32
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
+ * @author 	onelife
+ * @version 	0.4 beta
+ **********************************************************************
+ * @section License
+ * The license and distribution terms for this file may be found in the file LICENSE in this 
+ * distribution or at http://www.rt-thread.org/license/LICENSE
+ **********************************************************************
+ * @section Change Logs
+ * Date			Author		Notes
+ * 2011-02-22	onelife		Initial creation for EFM32
+ *********************************************************************/
+#ifndef __DEV_MISC_H__
+#define __DEV_MISC_H__
+
+/* Includes -------------------------------------------------------------------*/
+/* Exported types -------------------------------------------------------------*/
+/* Exported constants ---------------------------------------------------------*/
+/* Exported macro -------------------------------------------------------------*/
+/* Exported functions --------------------------------------------------------- */
+rt_err_t rt_hw_misc_init(void);
+rt_int32_t rt_hw_get_temp(void);
+rt_uint32_t rt_hw_get_vdd(void);
+
+#endif /* __DEV_MISC_H__ */

bsp/efm32/drv_acmp.c

+/******************************************************************//**
+ * @file 		drv_acmp.c
+ * @brief 	ACMP (analog comparator) driver of RT-Thread RTOS for EFM32
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
+ * @author 	onelife
+ * @version 	0.4 beta
+ **********************************************************************
+ * @section License
+ * The license and distribution terms for this file may be found in the file LICENSE in this 
+ * distribution or at http://www.rt-thread.org/license/LICENSE
+ **********************************************************************
+ * @section Change Logs
+ * Date			Author		Notes
+ * 2011-02-21	onelife		Initial creation for EFM32
+ *********************************************************************/
+ 
+/******************************************************************//**
+* @addtogroup efm32
+* @{
+*********************************************************************/
+
+/* Includes -------------------------------------------------------------------*/
+#include "board.h"
+#include "drv_acmp.h"
+
+/* Private typedef -------------------------------------------------------------*/
+/* Private define --------------------------------------------------------------*/
+/* Private macro --------------------------------------------------------------*/
+/* Private variables ------------------------------------------------------------*/
+#ifdef RT_USING_ACMP0
+	static struct rt_device acmp0_device;
+#endif
+
+#ifdef RT_USING_ACMP1
+	static struct rt_device acmp1_device;
+#endif
+
+/* Private function prototypes ---------------------------------------------------*/
+ACMP_WarmTime_TypeDef efm32_acmp_WarmTimeCalc(rt_uint32_t hfperFreq);
+
+/* Private functions ------------------------------------------------------------*/
+/******************************************************************//**
+ * @brief
+ *   Initialize ACMP device
+ *
+ * @details
+ *
+ * @note
+ *
+ * @param[in] dev
+ *   Pointer to device descriptor
+ *
+ * @return
+ *   Error code
+ *********************************************************************/
+ static rt_err_t rt_acmp_init(rt_device_t dev)
+{
+	RT_ASSERT(dev != RT_NULL);
+
+	struct efm32_acmp_device_t *acmp;
+
+	acmp = (struct efm32_acmp_device_t *)(dev->user_data);
+
+	acmp->hook.cbFunc 	= RT_NULL;
+	acmp->hook.userPtr 	= RT_NULL;
+
+	return RT_EOK;
+}
+
+/******************************************************************//**
+* @brief
+*	Configure ACMP device
+*
+* @details
+*
+* @note
+*
+* @param[in] dev
+*	Pointer to device descriptor
+*
+* @param[in] cmd
+*	ACMP control command
+*
+* @param[in] args
+*	Arguments
+*
+* @return
+*	Error code
+*********************************************************************/
+static rt_err_t rt_acmp_control(
+	rt_device_t 	dev, 
+	rt_uint8_t 		cmd, 
+	void 			*args)
+{
+	RT_ASSERT(dev != RT_NULL);
+
+	struct efm32_acmp_device_t *acmp;
+
+	acmp = (struct efm32_acmp_device_t *)(dev->user_data);
+
+	switch (cmd)
+	{
+	case RT_DEVICE_CTRL_SUSPEND:
+		/* Suspend device */
+		dev->flag |= RT_DEVICE_FLAG_SUSPENDED;
+		ACMP_DisableNoReset(acmp->acmp_device);
+		break;
+
+	case RT_DEVICE_CTRL_RESUME:
+		/* Resume device */
+		dev->flag &= ~RT_DEVICE_FLAG_SUSPENDED;
+		ACMP_Enable(acmp->acmp_device);
+		break;
+
+	case RT_DEVICE_CTRL_ACMP_INIT:
+		{
+			rt_bool_t int_en = false;
+
+			rt_kprintf("ACMP: control -> init start\n");
+			/* change device setting */
+			struct efm32_acmp_control_t *control;
+
+			control = (struct efm32_acmp_control_t *)args;
+
+			/* Configure ACMPn */
+			if (control->init == RT_NULL) 
+			{
+				return -RT_ERROR;
+			}
+			ACMP_Init(acmp->acmp_device, control->init);
+			ACMP_ChannelSet(acmp->acmp_device, control->negInput, control->posInput);
+			if (control->output != RT_NULL)
+			{
+				ACMP_GPIOSetup(
+					acmp->acmp_device, 
+					control->output->location, 
+					control->output->enable, 
+					control->output->invert);
+				int_en = true;
+			}
+			if (control->hook.cbFunc != RT_NULL)
+			{
+				acmp->hook.cbFunc = control->hook.cbFunc;
+				acmp->hook.userPtr = control->hook.userPtr;
+				int_en = true;
+			}
+
+			if (int_en)
+			{
+				/* Enable edge interrupt */
+				ACMP_IntEnable(acmp->acmp_device, ACMP_IEN_EDGE);
+				ACMP_IntClear(acmp->acmp_device, ACMP_IFC_EDGE);
+				
+				/* Enable ACMP0/1 interrupt vector in NVIC */
+				NVIC_ClearPendingIRQ(ACMP0_IRQn);
+				NVIC_SetPriority(ACMP0_IRQn, EFM32_IRQ_PRI_DEFAULT);
+				NVIC_EnableIRQ(ACMP0_IRQn);
+			}
+		}
+		break;
+
+	case RT_DEVICE_CTRL_ACMP_OUTPUT:
+		*((rt_bool_t *)args) = \
+			(acmp->acmp_device->STATUS & ACMP_STATUS_ACMPOUT) ? true : false;
+		break;
+		
+		default:
+			return -RT_ERROR;
+	}
+
+	return RT_EOK;
+}
+
+/******************************************************************//**
+* @brief
+*	Register ACMP device
+*
+* @details
+*
+* @note
+*
+* @param[in] device
+*	Pointer to device descriptor
+*
+* @param[in] name
+*	Device name
+*
+* @param[in] flag
+*	Configuration flags
+*
+* @param[in] acmp
+*	Pointer to ACMP device descriptor 
+*
+* @return
+*	Error code
+*********************************************************************/
+rt_err_t rt_hw_acmp_register(
+	rt_device_t		device, 
+	const char		*name, 
+	rt_uint32_t		flag, 
+	struct efm32_acmp_device_t *acmp)
+{
+	RT_ASSERT(device != RT_NULL);
+
+	device->type 		= RT_Device_Class_Char; /* fixme: should be acmp type */
+	device->rx_indicate = RT_NULL;
+	device->tx_complete = RT_NULL;
+	device->init 		= rt_acmp_init;
+	device->open		= RT_NULL;
+	device->close		= RT_NULL;
+	device->read 		= RT_NULL;
+	device->write 		= RT_NULL;
+	device->control 	= rt_acmp_control;
+	device->user_data	= acmp;
+
+	/* register a character device */
+	return rt_device_register(device, name, flag);
+}
+
+/******************************************************************//**
+ * @brief
+ *	ACMP edge trigger interrupt handler
+ *
+ * @details
+ *
+ * @note
+ *********************************************************************/
+void rt_hw_acmp_isr(rt_device_t dev)
+{
+	RT_ASSERT(dev != RT_NULL);
+
+	struct efm32_acmp_device_t *acmp;
+
+	acmp = (struct efm32_acmp_device_t *)(dev->user_data);
+
+	if (acmp->hook.cbFunc != RT_NULL)
+	{
+		(acmp->hook.cbFunc)(acmp->hook.userPtr);
+	}
+}
+
+/******************************************************************//**
+* @brief
+*	Initialize all ACMP module related hardware and register ACMP device to kernel
+*
+* @details
+*
+* @note
+*
+*********************************************************************/
+void rt_hw_acmp_init(void)
+{
+	struct efm32_acmp_device_t 	*acmp;
+	efm32_irq_hook_init_t		hook;
+
+#ifdef RT_USING_ACMP0
+	acmp = rt_malloc(sizeof(struct efm32_acmp_device_t));
+	if (acmp == RT_NULL)
+	{
+		rt_kprintf("no memory for ACMP0 driver\n");
+		return;
+	}
+	acmp->acmp_device		= ACMP0;
+
+	/* Enable clock for ACMP0 module */
+	CMU_ClockEnable(cmuClock_ACMP0, true);
+
+	/* Reset */
+	 ACMP_Reset(ACMP0);
+
+	hook.type			= efm32_irq_type_acmp;
+	hook.unit			= 0;
+	hook.cbFunc 		= rt_hw_acmp_isr;
+	hook.userPtr		= &acmp0_device;
+	efm32_irq_hook_register(&hook);
+
+	rt_hw_acmp_register(&acmp0_device, RT_ACMP0_NAME, EFM32_NO_DATA, acmp);	
+#endif
+
+#ifdef RT_USING_ACMP1
+	acmp = rt_malloc(sizeof(struct efm32_acmp_device_t));
+	if (acmp == RT_NULL)
+	{
+		rt_kprintf("no memory for ACMP1 driver\n");
+		return;
+	}
+	acmp->acmp_device		= ACMP1;
+
+	/* Enable clock for ACMP1 module */
+	CMU_ClockEnable(cmuClock_ACMP1, true);
+
+	/* Reset */
+	 ACMP_Reset(ACMP1);
+
+	hook.type			= efm32_irq_type_acmp;
+	hook.unit			= 0;
+	hook.cbFunc 		= rt_hw_acmp_isr;
+	hook.userPtr		= &acmp0_device;
+	efm32_irq_hook_register(&hook);
+
+	rt_hw_acmp_register(&acmp1_device, RT_ACMP1_NAME, EFM32_NO_DATA, acmp);	
+#endif
+
+}
+
+/******************************************************************//**
+ * @brief
+ *    Calculate the warm-up time value providing at least 10us
+ *
+ * @param[in] hfperFreq 
+ *    Frequency in Hz of reference HFPER clock. Set to 0 to use currently defined HFPER clock 
+ *    setting
+ *
+ * @return
+ *   Warm-up time  value to use for ACMP in order to achieve at least 10us
+ *********************************************************************/
+ACMP_WarmTime_TypeDef efm32_acmp_WarmTimeCalc(rt_uint32_t hfperFreq)
+{
+	if (!hfperFreq)
+	{
+		hfperFreq = CMU_ClockFreqGet(cmuClock_HFPER);
+
+		/* Just in case, make sure we get non-zero freq for below calculation */
+		if (!hfperFreq)
+		{
+		  hfperFreq = 1;
+		}
+	}
+
+	/* Determine number of HFPERCLK cycle >= 10us */
+	if (4 * 1000000 / hfperFreq > 10)
+	{
+		return acmpWarmTime4;
+	}
+	else if (8 * 1000000 / hfperFreq > 10)
+	{
+		return acmpWarmTime8;
+	}
+	else if (16 * 1000000 / hfperFreq > 10)
+	{
+		return acmpWarmTime16;
+	}
+	else if (32 * 1000000 / hfperFreq > 10)
+	{
+		return acmpWarmTime32;
+	}
+	else if (64 * 1000000 / hfperFreq > 10)
+	{
+		return acmpWarmTime64;
+	}
+	else if (128 * 1000000 / hfperFreq > 10)
+	{
+		return acmpWarmTime128;
+	}
+	else if (256 * 1000000 / hfperFreq > 10)
+	{
+		return acmpWarmTime256;
+	}
+	else if (512 * 1000000 / hfperFreq > 10)
+	{
+		return acmpWarmTime512;
+	}
+}
+
+/******************************************************************//**
+ * @}
+*********************************************************************/

bsp/efm32/drv_acmp.h

+/******************************************************************//**
+ * @file 		drv_acmp.h
+ * @brief 	ACMP (analog comparator) driver of RT-Thread RTOS for EFM32
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
+ * @author 	onelife
+ * @version 	0.4 beta
+ **********************************************************************
+ * @section License
+ * The license and distribution terms for this file may be found in the file LICENSE in this 
+ * distribution or at http://www.rt-thread.org/license/LICENSE
+ **********************************************************************
+ * @section Change Logs
+ * Date			Author		Notes
+ * 2011-02-23	onelife		Initial creation for EFM32
+ *********************************************************************/
+#ifndef __DRV_ACMP_H__
+#define __DRV_ACMP_H__
+
+/* Includes -------------------------------------------------------------------*/
+#include "hdl_interrupt.h"
+
+/* Exported types -------------------------------------------------------------*/
+struct efm32_acmp_device_t
+{
+	ACMP_TypeDef 		*acmp_device;
+	efm32_irq_hook_t 	hook;
+};
+
+struct efm32_acmp_output_t
+{
+	rt_uint32_t 		location; 
+	rt_bool_t 			enable; 
+	rt_bool_t 			invert;
+};
+
+struct efm32_acmp_control_t
+{
+	ACMP_Init_TypeDef			*init;
+	ACMP_Channel_TypeDef		posInput;
+	ACMP_Channel_TypeDef		negInput;
+	struct efm32_acmp_output_t 	*output;
+	efm32_irq_hook_t 			hook;
+};
+
+/* Exported constants ---------------------------------------------------------*/
+/* Exported macro -------------------------------------------------------------*/
+/** Default config for ACMP init structure. */
+#define ACMP_INIT_DEFAULT 										\
+{ 																\
+	false, 					/* Full bias current*/ 					\
+	true, 					/* Half bias current */ 				\
+	0, 						/* Biasprog current configuration */ 		\
+	false, 					/* Enable interrupt for falling edge */ 	\
+	false, 					/* Enable interrupt for rising edge */ 	\
+	acmpWarmTime512, 		/* Warm-up time must be >10us */ 		\
+	acmpHysteresisLevel0,	/* Hysteresis configuration */ 			\
+	0, 						/* Inactive comparator output value */ 	\
+	false, 					/* Enable low power mode */ 			\
+	0 						/* Vdd reference scaling */ 			\
+}
+
+/* Exported functions --------------------------------------------------------- */
+void rt_hw_acmp_init(void);
+
+#endif /*__DRV_ACMP_H__ */

bsp/efm32/drv_adc.c

+/******************************************************************//**
+ * @file 		drv_adc.c
+ * @brief 	ADC driver of RT-Thread RTOS for EFM32
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
+ * @author 	onelife
+ * @version 	0.4 beta
+ **********************************************************************
+ * @section License
+ * The license and distribution terms for this file may be found in the file LICENSE in this 
+ * distribution or at http://www.rt-thread.org/license/LICENSE
+ **********************************************************************
+ * @section Change Logs
+ * Date			Author		Notes
+ * 2011-02-21	onelife		Initial creation for EFM32
+ *********************************************************************/
+ 
+/******************************************************************//**
+* @addtogroup efm32
+* @{
+*********************************************************************/
+
+/* Includes -------------------------------------------------------------------*/
+#include "board.h"
+#include "drv_adc.h"
+
+/* Private typedef -------------------------------------------------------------*/
+/* Private define --------------------------------------------------------------*/
+/* Private macro --------------------------------------------------------------*/
+/* Private variables ------------------------------------------------------------*/
+#ifdef RT_USING_ADC0
+	static struct rt_device adc0_device;
+#endif
+
+/* Private function prototypes ---------------------------------------------------*/
+rt_uint32_t efm32_adc_calibration(
+	ADC_TypeDef 			*adc, 
+	ADC_Ref_TypeDef			ref,
+	ADC_SingleInput_TypeDef	input);
+
+/* Private functions ------------------------------------------------------------*/
+/******************************************************************//**
+ * @brief
+ *   Initialize ADC device
+ *
+ * @details
+ *
+ * @note
+ *
+ * @param[in] dev
+ *   Pointer to device descriptor
+ *
+ * @return
+ *   Error code
+ *********************************************************************/
+ static rt_err_t rt_adc_init(rt_device_t dev)
+{
+	RT_ASSERT(dev != RT_NULL);
+
+	rt_uint32_t temp;
+	
+	struct efm32_adc_device_t *adc;
+
+	adc = (struct efm32_adc_device_t *)(dev->user_data);
+
+	temp = efm32_adc_calibration(adc->adc_device, ADC_INIT_REF, ADC_INIT_CH);
+
+#ifdef RT_ADC_DEBUG
+	rt_kprintf("adc->CAL = %x\n", temp);
+#endif
+
+	return RT_EOK;
+}
+
+/******************************************************************//**
+* @brief
+*	Configure ADC device
+*
+* @details
+*
+* @note
+*
+* @param[in] dev
+*	Pointer to device descriptor
+*
+* @param[in] cmd
+*	ADC control command
+*
+* @param[in] args
+*	Arguments
+*
+* @return
+*	Error code
+*********************************************************************/
+static rt_err_t rt_adc_control(
+	rt_device_t 	dev, 
+	rt_uint8_t 		cmd, 
+	void 			*args)
+{
+	RT_ASSERT(dev != RT_NULL);
+
+	struct efm32_adc_device_t *adc;
+
+	adc = (struct efm32_adc_device_t *)(dev->user_data);
+
+	switch (cmd)
+	{
+	case RT_DEVICE_CTRL_SUSPEND:
+		/* Suspend device */
+		dev->flag |= RT_DEVICE_FLAG_SUSPENDED;
+		adc->adc_device->CMD = ADC_CMD_SINGLESTOP | ADC_CMD_SCANSTOP;
+		break;
+
+	case RT_DEVICE_CTRL_RESUME:
+		/* Resume device */
+		dev->flag &= ~RT_DEVICE_FLAG_SUSPENDED;
+		
+		switch (adc->mode)
+		{
+		case ADC_MODE_SINGLE:
+			ADC_Start(adc->adc_device, adcStartSingle);
+			break;
+		
+		case ADC_MODE_SCAN:
+			ADC_Start(adc->adc_device, adcStartScan);
+			break;
+		
+		case ADC_MODE_TAILGATE:
+			ADC_Start(adc->adc_device, adcStartScanAndSingle);
+			break;
+		
+		default:
+			return -RT_ERROR;
+		}
+		break;
+
+	case RT_DEVICE_CTRL_ADC_MODE:
+		{
+			/* change device setting */
+			struct efm32_adc_control_t *control;
+
+			control = (struct efm32_adc_control_t *)args;
+
+			switch (control->mode)
+			{
+			case ADC_MODE_SINGLE:
+				ADC_InitSingle(adc->adc_device, control->singleInit);
+				break;
+
+			case ADC_MODE_SCAN:
+				ADC_InitScan(adc->adc_device, control->scanInit);
+				break;
+
+			case ADC_MODE_TAILGATE:
+				ADC_InitSingle(adc->adc_device, control->singleInit);
+				ADC_InitScan(adc->adc_device, control->scanInit);
+				break;
+
+			default:
+				return -RT_ERROR;
+			}
+
+			adc->mode = control->mode;
+		}
+		break;
+		
+	case RT_DEVICE_CTRL_ADC_RESULT:
+		switch (adc->mode)
+		{
+		case ADC_MODE_SINGLE:
+			while (adc->adc_device->STATUS & ADC_STATUS_SINGLEACT);
+			*((rt_uint32_t *)args) = ADC_DataSingleGet(adc->adc_device);
+			break;
+
+		case ADC_MODE_SCAN:
+			while (adc->adc_device->STATUS & ADC_STATUS_SCANACT);
+			*((rt_uint32_t *)args) = ADC_DataScanGet(adc->adc_device);
+			break;
+
+		case ADC_MODE_TAILGATE:
+			while (adc->adc_device->STATUS & ADC_STATUS_SCANACT);
+			*((rt_uint32_t *)args) = ADC_DataScanGet(adc->adc_device);
+			
+			while (adc->adc_device->STATUS & ADC_STATUS_SINGLEACT);
+			*((rt_uint32_t *)args + 1) = ADC_DataSingleGet(adc->adc_device);
+			break;
+
+		default:
+			return -RT_ERROR;
+		}
+		break;
+	}
+
+	return RT_EOK;
+}
+
+/******************************************************************//**
+* @brief
+*	Register ADC device
+*
+* @details
+*
+* @note
+*
+* @param[in] device
+*	Pointer to device descriptor
+*
+* @param[in] name
+*	Device name
+*
+* @param[in] flag
+*	Configuration flags
+*
+* @param[in] adc
+*	Pointer to ADC device descriptor 
+*
+* @return
+*	Error code
+*********************************************************************/
+rt_err_t rt_hw_adc_register(
+	rt_device_t		device, 
+	const char		*name, 
+	rt_uint32_t		flag, 
+	struct efm32_adc_device_t *adc)
+{
+	RT_ASSERT(device != RT_NULL);
+
+	device->type 		= RT_Device_Class_Char; /* fixme: should be adc type */
+	device->rx_indicate = RT_NULL;
+	device->tx_complete = RT_NULL;
+	device->init 		= rt_adc_init;
+	device->open		= RT_NULL;
+	device->close		= RT_NULL;
+	device->read 		= RT_NULL;
+	device->write 		= RT_NULL;
+	device->control 	= rt_adc_control;
+	device->user_data	= adc;
+
+	/* register a character device */
+	return rt_device_register(device, name, flag);
+}
+
+/******************************************************************//**
+* @brief
+*	Initialize all ADC module related hardware and register ADC device to kernel
+*
+* @details
+*
+* @note
+*
+*********************************************************************/
+void rt_hw_adc_init(void)
+{
+	struct efm32_adc_device_t 	*adc;
+	ADC_Init_TypeDef 			init = ADC_INIT_DEFAULT;
+
+	init.ovsRateSel	= adcOvsRateSel4096; //TODO
+	init.timebase 	= ADC_TimebaseCalc(0);
+	init.prescale 	= ADC_PrescaleCalc(ADC_CONVERT_FREQUENCY, 0);
+
+	
+#ifdef RT_USING_ADC0
+	adc = rt_malloc(sizeof(struct efm32_adc_device_t));
+	if (adc == RT_NULL)
+	{
+		rt_kprintf("no memory for ADC driver\n");
+		return;
+	}
+	adc->adc_device	= ADC0;
+	adc->mode 		= ADC_MODE_SINGLE;
+
+	/* Enable clock for ADCn module */
+	CMU_ClockEnable(cmuClock_ADC0, true);
+
+	/* Reset */
+	 ADC_Reset(ADC0);
+
+	/* Configure ADC */
+	ADC_Init(adc->adc_device, &init);
+
+	rt_hw_adc_register(&adc0_device, RT_ADC0_NAME, EFM32_NO_DATA, adc);	
+#endif
+}
+
+
+/***************************************************************************//**
+ * @brief
+ *   Calibrate offset and gain for the specified reference.
+ *   Supports currently only single ended gain calibration.
+ *   Could easily be expanded to support differential gain calibration.
+ *
+ * @details
+ *   The offset calibration routine measures 0 V with the ADC, and adjust
+ *   the calibration register until the converted value equals 0.
+ *   The gain calibration routine needs an external reference voltage equal
+ *   to the top value for the selected reference. For example if the 2.5 V
+ *   reference is to be calibrated, the external supply must also equal 2.5V.
+ *
+ * @param[in] adc
+ *   Pointer to ADC peripheral register block.
+ *
+ * @param[in] ref
+ *   Reference used during calibration. Can be both external and internal
+ *   references.
+ *
+ * @param[in] input
+ *   Input channel used during calibration.
+ *
+ * @return
+ *   The final value of the calibration register, note that the calibration
+ *   register gets updated with this value during the calibration.
+ *   No need to load the calibration values after the function returns.
+ ******************************************************************************/
+rt_uint32_t efm32_adc_calibration(
+	ADC_TypeDef 			*adc, 
+	ADC_Ref_TypeDef			ref,
+	ADC_SingleInput_TypeDef	input)
+{
+	rt_uint32_t 	cal;
+	rt_int32_t 		sample;
+	rt_int8_t 		high, mid, low, tmp;
+	ADC_InitSingle_TypeDef singleInit 	= ADC_INITSINGLE_DEFAULT;
+
+	/* Init for single conversion use, measure diff 0 with selected reference. */
+	singleInit.reference 	= ref;
+	singleInit.input 		= adcSingleInpDiff0;
+	singleInit.acqTime 		= adcAcqTime32;
+	singleInit.diff 		= true;
+	/* Enable oversampling rate */
+	singleInit.resolution	= adcResOVS;
+	ADC_InitSingle(adc, &singleInit);
+
+	/* ADC is now set up for offset calibration */
+	/* Offset calibration register is a 7 bit signed 2's complement value. */
+	/* Use unsigned indexes for binary search, and convert when calibration */
+	/* register is written to. */
+	high = 63;
+	low = -64;
+
+	/* Do binary search for offset calibration*/
+	while (low < high)
+	{
+		/* Calculate midpoint */
+		mid = low + (high - low) / 2;
+
+		/* Midpoint is converted to 2's complement and written to both scan and */
+		/* single calibration registers */
+		cal = adc->CAL & ~(_ADC_CAL_SINGLEOFFSET_MASK | _ADC_CAL_SCANOFFSET_MASK);
+		tmp = mid < 0 ? (mid & 0x3F ^ 0x3F | 0x40) + 1 : mid;
+		cal |= tmp << _ADC_CAL_SINGLEOFFSET_SHIFT;
+		cal |= tmp << _ADC_CAL_SCANOFFSET_SHIFT;
+#ifdef RT_ADC_DEBUG
+		rt_kprintf("adc->CAL = %x, cal = %x, tmp = %x\n", adc->CAL, cal, tmp);
+#endif			
+		adc->CAL = cal;
+
+		/* Do a conversion */
+		ADC_Start(adc, adcStartSingle);
+
+		/* Wait while conversion is active */
+		while (adc->STATUS & ADC_STATUS_SINGLEACT) ;
+
+		/* Get ADC result */
+		sample = ADC_DataSingleGet(adc);
+
+		/* Check result and decide in which part of to repeat search */
+		/* Calibration register has negative effect on result */
+		if (sample < 0)
+		{
+			/* Repeat search in bottom half. */
+			high = mid;
+		}
+		else if (sample > 0)
+		{
+			/* Repeat search in top half. */
+			low = mid + 1;
+		}
+		else
+		{
+			/* Found it, exit while loop */
+			break;
+		}
+	}
+#ifdef RT_ADC_DEBUG
+	rt_kprintf("adc->CAL = %x\n", adc->CAL);
+#endif
+
+	/* Now do gain calibration, only input and diff settings needs to be changed */
+	adc->SINGLECTRL &= ~(_ADC_SINGLECTRL_INPUTSEL_MASK | _ADC_SINGLECTRL_DIFF_MASK);
+	adc->SINGLECTRL |= (input << _ADC_SINGLECTRL_INPUTSEL_SHIFT);
+	adc->SINGLECTRL |= (false << _ADC_SINGLECTRL_DIFF_SHIFT);
+
+	/* ADC is now set up for gain calibration */
+	/* Gain calibration register is a 7 bit unsigned value. */
+	high = 127;
+	low = 0;
+
+	/* Do binary search for gain calibration */
+	while (low < high)
+	{
+		/* Calculate midpoint and write to calibration register */
+		mid = low + (high - low) / 2;
+
+		/* Midpoint is converted to 2's complement */
+		cal      = adc->CAL & ~(_ADC_CAL_SINGLEGAIN_MASK | _ADC_CAL_SCANGAIN_MASK);
+		cal     |= mid << _ADC_CAL_SINGLEGAIN_SHIFT;
+		cal     |= mid << _ADC_CAL_SCANGAIN_SHIFT;
+#ifdef RT_ADC_DEBUG
+		rt_kprintf("adc->CAL = %x, cal = %x, mid = %x\n", adc->CAL, cal, mid);
+#endif		
+		adc->CAL = cal;
+
+		/* Do a conversion */
+		ADC_Start(adc, adcStartSingle);
+
+		/* Wait while conversion is active */
+		while (adc->STATUS & ADC_STATUS_SINGLEACT) ;
+
+		/* Get ADC result */
+		sample = ADC_DataSingleGet(adc);
+
+		/* Check result and decide in which part to repeat search */
+		/* Compare with a value atleast one LSB's less than top to avoid overshooting */
+		/* Since oversampling is used, the result is 16 bits, but a couple of lsb's */
+		/* applies to the 12 bit result value, if 0xffe is the top value in 12 bit, this */
+		/* is in turn 0xffe0 in the 16 bit result. */
+		/* Calibration register has positive effect on result */
+		if (sample > 0xffd0)
+		{
+		  /* Repeat search in bottom half. */
+		  high = mid;
+		}
+		else if (sample < 0xffd0)
+		{
+		  /* Repeat search in top half. */
+		  low = mid + 1;
+		}
+		else
+		{
+		  /* Found it, exit while loop */
+		  break;
+		}
+	}
+#ifdef RT_ADC_DEBUG
+	rt_kprintf("adc->CAL = %x\n", adc->CAL);
+#endif
+
+	return adc->CAL;
+}
+
+/******************************************************************//**
+ * @}
+*********************************************************************/

bsp/efm32/drv_adc.h

+/******************************************************************//**
+ * @file 		drv_adc.h
+ * @brief 	ADC driver of RT-Thread RTOS for EFM32
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
+ * @author 	onelife
+ * @version 	0.4 beta
+ **********************************************************************
+ * @section License
+ * The license and distribution terms for this file may be found in the file LICENSE in this 
+ * distribution or at http://www.rt-thread.org/license/LICENSE
+ **********************************************************************
+ * @section Change Logs
+ * Date			Author		Notes
+ * 2011-02-21	onelife		Initial creation for EFM32
+ *********************************************************************/
+#ifndef __DRV_ADC_H__
+#define __DRV_ADC_H__
+
+/* Includes -------------------------------------------------------------------*/
+/* Exported types -------------------------------------------------------------*/
+struct efm32_adc_device_t
+{
+	ADC_TypeDef 			*adc_device;
+	rt_uint32_t 			mode;
+};
+
+struct efm32_adc_control_t
+{
+	rt_uint32_t 			mode;
+	ADC_InitSingle_TypeDef	*singleInit;
+	ADC_InitScan_TypeDef 	*scanInit;
+};
+
+/* Exported constants ---------------------------------------------------------*/
+/* Exported macro -------------------------------------------------------------*/
+#define ADC_MODE_SINGLE 	0x00UL
+#define ADC_MODE_SCAN 		0x01UL
+#define ADC_MODE_TAILGATE	0x02UL
+
+/* Exported functions --------------------------------------------------------- */
+void rt_hw_adc_init(void);
+
+#endif /*__DRV_ADC_H__ */

bsp/efm32/drv_dma.c

 /******************************************************************//**
  * @file 		drv_dma.c
  * @brief 	USART driver of RT-Thread RTOS for EFM32
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	onelife
  * @version 	0.4 beta
  **********************************************************************

bsp/efm32/drv_dma.h

 /******************************************************************//**
  * @file 		drv_dma.h
  * @brief 	USART driver of RT-Thread RTOS for EFM32
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	onelife
  * @version 	0.4 beta
  **********************************************************************

bsp/efm32/drv_iic.c

 /******************************************************************//**
  * @file 		drv_iic.c
  * @brief 	Serial API of RT-Thread RTOS for EFM32
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	onelife
  * @version 	0.4 beta
  **********************************************************************
@@ -74,16 +74,6 @@ static rt_err_t rt_iic_init (rt_device_t dev)
 	return RT_EOK;
 }
 
-static rt_err_t rt_iic_open(rt_device_t dev, rt_uint16_t oflag)
-{
-	return RT_EOK;
-}
-
-static rt_err_t rt_iic_close(rt_device_t dev)
-{
-	return RT_EOK;
-}
-
 /******************************************************************//**
  * @brief
  *   Read from IIC device
@@ -296,9 +286,10 @@ static rt_err_t rt_iic_control (
 	rt_uint8_t 		cmd, 
 	void 			*args)
 {
+	 RT_ASSERT(dev != RT_NULL);
+
 	struct efm32_iic_device_t *iic;
 
-	RT_ASSERT(dev != RT_NULL);
 	iic = (struct efm32_iic_device_t*)dev->user_data;
 	switch (cmd)
 	{
@@ -314,7 +305,7 @@ static rt_err_t rt_iic_control (
 		I2C_Enable(iic->iic_device, true);
 		break;
 
-	case RT_DEVICE_CTRL_IIC:
+	case RT_DEVICE_CTRL_IIC_SETTING:
 		{
 			/* change device setting */
 			struct efm32_iic_control_t *control;
@@ -371,8 +362,8 @@ rt_err_t rt_hw_iic_register(
 	device->rx_indicate = RT_NULL;
 	device->tx_complete = RT_NULL;
 	device->init 		= rt_iic_init;
-	device->open		= rt_iic_open;
-	device->close		= rt_iic_close;
+	device->open		= RT_NULL;
+	device->close		= RT_NULL;
 	device->read 		= rt_iic_read;
 	device->write 		= rt_iic_write;
 	device->control 	= rt_iic_control;

bsp/efm32/drv_iic.h

 /******************************************************************//**
  * @file 		drv_iic.h
  * @brief 	IIC driver of RT-Thread RTOS for EFM32
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	onelife
  * @version 	0.4 beta
  **********************************************************************

bsp/efm32/drv_rtc.c

 /******************************************************************//**
  * @file 		drv_rtc.c
  * @brief 	RTC driver of RT-Thread RTOS for EFM32
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	Bernard, onelife
  * @version 	0.4 beta
  **********************************************************************
@@ -29,8 +29,8 @@
 /* Private define --------------------------------------------------------------*/
 /* Private macro --------------------------------------------------------------*/
 /* Private variables ------------------------------------------------------------*/
-static rt_uint32_t rtc_time;
 static struct rt_device rtc;
+static rt_uint32_t rtc_time;
 
 /* Private function prototypes ---------------------------------------------------*/
 static void startLfxoForRtc(void);
@@ -117,6 +117,49 @@ void rt_hw_rtc_isr(rt_device_t device)
 	RTC->IFC = _RTC_IFC_MASK;
 }
 
+/******************************************************************//**
+* @brief
+*	Register RTC device
+*
+* @details
+*
+* @note
+*
+* @param[in] device
+*	Pointer to device descriptor
+*
+* @param[in] name
+*	Device name
+*
+* @param[in] flag
+*	Configuration flags
+*
+* @return
+*	Error code
+*********************************************************************/
+rt_err_t rt_hw_rtc_register(
+	rt_device_t		device, 
+	const char		*name, 
+	rt_uint32_t		flag)
+{
+	RT_ASSERT(device != RT_NULL);
+
+	device->type 		= RT_Device_Class_RTC;
+	device->rx_indicate = RT_NULL;
+	device->tx_complete = RT_NULL;
+	device->init 		= RT_NULL;
+	device->open		= rt_rtc_open;
+	device->close		= RT_NULL;
+	device->read 		= rt_rtc_read;
+	device->write 		= RT_NULL;
+	device->control 	= rt_rtc_control;
+	device->user_data	= RT_NULL; /* no private */
+
+	/* register a character device */
+	return rt_device_register(device, name, RT_DEVICE_FLAG_RDWR | flag);
+}
+
+
 /******************************************************************//**
 * @brief
 *	Initialize all RTC module related hardware and register RTC device to kernel
@@ -129,7 +172,6 @@ void rt_hw_rtc_init(void)
 {
 	rt_uint32_t reset;
 	
-    rtc.type = RT_Device_Class_RTC;
 	reset = RMU_ResetCauseGet();
 		
 	if (reset & RMU_RSTCAUSE_PORST || reset & RMU_RSTCAUSE_EXTRST) //TODO
@@ -168,14 +210,7 @@ void rt_hw_rtc_init(void)
     }
 
     /* register rtc device */
-    rtc.init 	= RT_NULL;
-    rtc.open 	= rt_rtc_open;
-    rtc.close	= RT_NULL;
-    rtc.read 	= rt_rtc_read;
-    rtc.write	= RT_NULL;
-    rtc.control = rt_rtc_control;
-    rtc.user_data = RT_NULL; /* no private */
-    rt_device_register(&rtc, "rtc", RT_DEVICE_FLAG_RDWR);
+	rt_hw_rtc_register(&rtc, RT_RTC_NAME, EFM32_NO_DATA);
 }
 
 /******************************************************************//**

bsp/efm32/drv_rtc.h

 /******************************************************************//**
  * @file 		drv_rtc.h
  * @brief 	RTC driver of RT-Thread RTOS for EFM32
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	Bernard, onelife
  * @version 	0.4 beta
  **********************************************************************
@@ -24,4 +24,4 @@
 /* Exported functions --------------------------------------------------------- */
 void rt_hw_rtc_init(void);
 
-#endif
+#endif /* __DRV_RTC_H__ */
\ No newline at end of file

bsp/efm32/drv_timer.c

@@ -27,7 +27,7 @@
 /* Private define --------------------------------------------------------------*/
 /* Private macro --------------------------------------------------------------*/
 #define TIMER_TopCalculate(p) \
-		(p * (HFXO_FREQUENCY / (1 << TMR_CFG_PRESCALER) / 1000))
+		(p * (EFM32_HFXO_FREQUENCY / (1 << TMR_CFG_PRESCALER) / 1000))
 
 /* Private variables ------------------------------------------------------------*/
 #ifdef RT_USING_TIMER2
@@ -56,7 +56,6 @@
 
 	struct efm32_timer_device_t *timer;
 
-	RT_ASSERT(dev != RT_NULL);
 	timer = (struct efm32_timer_device_t *)(dev->user_data);
 
 	timer->hook.cbFunc = RT_NULL;
@@ -90,9 +89,10 @@ static rt_err_t rt_hs_timer_control (
 	rt_uint8_t 		cmd, 
 	void 			*args)
 {
+	RT_ASSERT(dev != RT_NULL);
+
 	struct efm32_timer_device_t *timer;
 
-	RT_ASSERT(dev != RT_NULL);
 	timer = (struct efm32_timer_device_t *)(dev->user_data);
 
 	switch (cmd)
@@ -109,7 +109,7 @@ static rt_err_t rt_hs_timer_control (
 		TIMER_Enable(timer->timer_device, true);
 		break;
 
-	case RT_DEVICE_CTRL_TIMER:
+	case RT_DEVICE_CTRL_TIMER_PERIOD:
 		{
 			/* change device setting */
 			struct efm32_timer_control_t *control;
@@ -185,9 +185,10 @@ rt_err_t rt_hw_timer_register(
  *********************************************************************/
 void rt_hw_timer_isr(rt_device_t dev)
 {
+	RT_ASSERT(dev != RT_NULL);
+
 	struct efm32_timer_device_t *timer;
 
-	RT_ASSERT(dev != RT_NULL);
 	timer = (struct efm32_timer_device_t *)(dev->user_data);
 
 	if (timer->hook.cbFunc != RT_NULL)

bsp/efm32/drv_timer.h

 /******************************************************************//**
  * @file 		drv_timer.h
  * @brief 	USART driver of RT-Thread RTOS for EFM32
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	onelife
  * @version 	0.4 beta
  **********************************************************************
@@ -22,7 +22,7 @@
 /* Exported types -------------------------------------------------------------*/
 struct efm32_timer_device_t
 {
-	TIMER_TypeDef* 		timer_device;
+	TIMER_TypeDef		*timer_device;
 	efm32_irq_hook_t 	hook;
 };
 

bsp/efm32/drv_usart.c

 /******************************************************************//**
  * @file 		drv_usart.c
  * @brief 	USART driver of RT-Thread RTOS for EFM32
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	onelife
  * @version 	0.4 beta
  **********************************************************************
@@ -125,10 +125,11 @@ static rt_err_t rt_usart_init (rt_device_t dev)
  *********************************************************************/
 static rt_err_t rt_usart_open(rt_device_t dev, rt_uint16_t oflag)
 {
+	RT_ASSERT(dev != RT_NULL);
+
 	struct efm32_usart_device_t	*usart;
 	IRQn_Type 					rxIrq;
 	
-	RT_ASSERT(dev != RT_NULL);
 	usart = (struct efm32_usart_device_t *)(dev->user_data);
 
 	//if (usart->state & USART_STATE_CONSOLE)
@@ -454,9 +455,10 @@ static rt_err_t rt_usart_control (
 	rt_uint8_t 		cmd, 
 	void 			*args)
 {
+	RT_ASSERT(dev != RT_NULL);
+
 	struct efm32_usart_device_t *usart;
 
-	RT_ASSERT(dev != RT_NULL);
 	usart = (struct efm32_usart_device_t *)(dev->user_data);
 	
 	switch (cmd)
@@ -473,7 +475,7 @@ static rt_err_t rt_usart_control (
 		USART_Enable(usart->usart_device, usartEnable);
 		break;
 
-	case RT_DEVICE_CTRL_USART:
+	case RT_DEVICE_CTRL_USART_RBUFFER:
 		/* Set RX buffer */
 		{
 			struct efm32_usart_int_mode_t *int_rx;

bsp/efm32/drv_usart.h

 /******************************************************************//**
  * @file 		drv_usart.h
  * @brief 	USART driver of RT-Thread RTOS for EFM32
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	onelife
  * @version 	0.4 beta
  **********************************************************************

bsp/efm32/efm32_rom.ld

 /******************************************************************//**
  * @file 		efm32_rom.ld
  * @brief 	Linker script for EFM32 with GNU ld
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	Bernard, onelife
  * @version 	0.4 beta
  **********************************************************************

bsp/efm32/hdl_interrupt.c

 /******************************************************************//**
  * @file 		hdl_interrupt.c
  * @brief 	USART driver of RT-Thread RTOS for EFM32
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	onelife
  * @version 	0.4 beta
  **********************************************************************
@@ -29,9 +29,10 @@
 /* Private variables ---------------------------------------------------------*/
 efm32_irq_hook_t dmaCbTable[DMA_CHAN_COUNT * 2]	= {RT_NULL};
 efm32_irq_hook_t timerCbTable[TIMER_COUNT] 		= {RT_NULL};
+efm32_irq_hook_t rtcCbTable[RTC_COUNT] 			= {RT_NULL};
 efm32_irq_hook_t gpioCbTable[16] 				= {RT_NULL};
+efm32_irq_hook_t acmpCbTable[ACMP_COUNT] 		= {RT_NULL};
 efm32_irq_hook_t usartCbTable[USART_COUNT * 2] 	= {RT_NULL};
-efm32_irq_hook_t rtcCbTable[RTC_COUNT] 			= {RT_NULL};
 
 /* Private function prototypes -----------------------------------------------*/
 /* Private functions ---------------------------------------------------------*/
@@ -205,6 +206,34 @@ void TIMER2_IRQHandler(void)
 	}
 }
 
+/******************************************************************//**
+ * @brief
+ * 	Common RTC interrupt handler
+ *
+ * @details
+ * 	This function handles RTC counter overflow interrupt request
+ *
+ * @note
+ *
+ *********************************************************************/
+void RTC_IRQHandler(void)
+{
+    /* enter interrupt */
+    rt_interrupt_enter();
+
+	if (RTC->IF & RTC_IF_OF)
+	{
+		/* invoke callback function */
+		if (rtcCbTable[0].cbFunc != RT_NULL)
+		{
+			(rtcCbTable[0].cbFunc)(rtcCbTable[0].userPtr);
+		}
+	}
+	
+    /* leave interrupt */
+    rt_interrupt_leave();
+}
+
 /******************************************************************//**
  * @brief
  * 	Common even number GPIO interrupt handler
@@ -271,6 +300,49 @@ void GPIO_ODD_IRQHandler(void)
     rt_interrupt_leave();
 }
 
+/******************************************************************//**
+ * @brief
+ * 	Common ACMP interrupt handler
+ *
+ * @details
+ * 	This function handles ACMP edge trigger interrupt request
+ *
+ * @note
+ *
+ *********************************************************************/
+void ACMP0_IRQHandler(void)
+{
+    /* enter interrupt */
+    rt_interrupt_enter();
+
+	if (ACMP0->IF & ACMP_IF_EDGE)
+	{
+		/* invoke callback function */
+		if (acmpCbTable[0].cbFunc != RT_NULL)
+		{
+			(acmpCbTable[0].cbFunc)(acmpCbTable[0].userPtr);
+		}
+
+		/* clear interrupt */
+		BITBAND_Peripheral(&(ACMP0->IFC), _ACMP_IF_EDGE_SHIFT, 0x1UL);
+	}
+
+	if (ACMP1->IF & ACMP_IF_EDGE)
+	{
+		/* invoke callback function */
+		if (acmpCbTable[1].cbFunc != RT_NULL)
+		{
+			(acmpCbTable[1].cbFunc)(acmpCbTable[1].userPtr);
+		}
+
+		/* clear interrupt */
+		BITBAND_Peripheral(&(ACMP1->IFC), _ACMP_IF_EDGE_SHIFT, 0x1UL);
+	}
+
+    /* leave interrupt */
+    rt_interrupt_leave();
+}
+
 /******************************************************************//**
  * @brief
  * 	Common USART0 TX interrupt handler
@@ -430,34 +502,6 @@ void USART2_RX_IRQHandler(void)
 	}
 }
 
-/******************************************************************//**
- * @brief
- * 	Common RTC interrupt handler
- *
- * @details
- * 	This function handles RTC counter overflow interrupt request
- *
- * @note
- *
- *********************************************************************/
-void RTC_IRQHandler(void)
-{
-    /* enter interrupt */
-    rt_interrupt_enter();
-
-	if (RTC->IF & RTC_IF_OF)
-	{
-		/* invoke callback function */
-		if (rtcCbTable[0].cbFunc != RT_NULL)
-		{
-			(rtcCbTable[0].cbFunc)(rtcCbTable[0].userPtr);
-		}
-	}
-	
-    /* leave interrupt */
-    rt_interrupt_leave();
-}
-
 /******************************************************************//**
  * @brief
  * 	EFM32 common interrupt handlers register function
@@ -476,6 +520,11 @@ rt_err_t efm32_irq_hook_register(efm32_irq_hook_init_t *hook)
 		dmaCbTable[hook->unit].userPtr = hook->userPtr;
 		break;
 
+	case efm32_irq_type_rtc:
+		rtcCbTable[hook->unit].cbFunc = hook->cbFunc;
+		rtcCbTable[hook->unit].userPtr = hook->userPtr;
+		break;
+
 	case efm32_irq_type_timer:
 		timerCbTable[hook->unit].cbFunc = hook->cbFunc;
 		timerCbTable[hook->unit].userPtr = hook->userPtr;
@@ -486,16 +535,16 @@ rt_err_t efm32_irq_hook_register(efm32_irq_hook_init_t *hook)
 		gpioCbTable[hook->unit].userPtr = hook->userPtr;
 		break;
 
+	case efm32_irq_type_acmp:
+		acmpCbTable[hook->unit].cbFunc = hook->cbFunc;
+		acmpCbTable[hook->unit].userPtr = hook->userPtr;
+		break;
+
 	case efm32_irq_type_usart:
 		usartCbTable[hook->unit].cbFunc = hook->cbFunc;
 		usartCbTable[hook->unit].userPtr = hook->userPtr;
 		break;
 
-	case efm32_irq_type_rtc:
-		rtcCbTable[hook->unit].cbFunc = hook->cbFunc;
-		rtcCbTable[hook->unit].userPtr = hook->userPtr;
-		break;
-		
 	default:
 		break;
 	}

bsp/efm32/hdl_interrupt.h

 /******************************************************************//**
  * @file 		hdl_interrupt.h
  * @brief 	USART driver of RT-Thread RTOS for EFM32
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	onelife
  * @version 	0.4 beta
  **********************************************************************
@@ -21,10 +21,11 @@
 enum efm32_irq_hook_type_t
 {
 	efm32_irq_type_dma = 0,
+	efm32_irq_type_rtc,
 	efm32_irq_type_timer,
 	efm32_irq_type_gpio,
-	efm32_irq_type_usart,
-	efm32_irq_type_rtc
+	efm32_irq_type_acmp,
+	efm32_irq_type_usart	
 };
 
 typedef void (*efm32_irq_callback_t)(rt_device_t device);

bsp/efm32/rtconfig.h

@@ -34,6 +34,7 @@
 //#define THREAD_DEBUG
 //#define IRQ_DEBUG
 //#define RT_IRQHDL_DEBUG
+//#define RT_ADC_DEBUG
 #define RT_USING_OVERFLOW_CHECK
 #define RT_USART_DEBUG
 
@@ -87,6 +88,20 @@
 #define RT_USART1_USING_DMA		0x0UL
 #endif
 
+/* SECTION: RTC options */
+#if (defined(EFM32_G290_DK) || defined(EFM32_G890_STK))
+#define RT_USING_RTC
+#endif
+#define RT_RTC_NAME 			"rtc"
+
+/* SECTION: ADC options */
+#define RT_USING_ACMP0
+#define RT_ACMP0_NAME 			"acmp0"
+
+/* SECTION: ADC options */
+#define RT_USING_ADC0
+#define RT_ADC0_NAME 			"adc"
+
 /* SECTION: Serial options */
 #if defined(EFM32_G290_DK)
 #define RT_CONSOLE_DEVICE		0x0UL

bsp/efm32/rtconfig.py

@@ -8,7 +8,13 @@ if  CROSS_TOOL == 'gcc':
 	EXEC_PATH 	= 'C:\Program Files (x86)\CodeSourcery\Sourcery G++ Lite\bin'
 
 BUILD = 'debug'
-EFM32_TYPE = 'EFM32G890F128'
+EFM32_BOARD 	=  'EFM32_G890_STK'
+# EFM32_BOARD 	=  'EFM32_G290_DK'
+
+if EFM32_BOARD == 'EFM32_G890_STK':
+	EFM32_TYPE = 'EFM32G890F128'
+elif EFM32_BOARD == 'EFM32_G290_DK':
+	EFM32_TYPE = 'EFM32G290F128'
 
 if PLATFORM == 'gcc':
     # toolchains

bsp/efm32/startup.c

 /******************************************************************//**
  * @file 		interrupt.c
  * @brief 	This file is part of RT-Thread RTOS
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	Bernard, onelife
  * @version 	0.4 beta
  **********************************************************************
@@ -118,8 +118,10 @@ void rtthread_startup(void)
 	/* init scheduler system */
 	rt_system_scheduler_init();
 
+#ifdef RT_USING_RTC	
 	/* init RTC */
     rt_hw_rtc_init();
+#endif
 
 	/* init all device */
 	rt_device_init_all();

libcpu/arm/cortex-m3/context_gcc.S

 /******************************************************************//**
  * @file 		context_gcc.S
  * @brief 	Context switch functions
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	Bernard, onelife
  * @version 	0.4 beta
  **********************************************************************

libcpu/arm/cortex-m3/cpu.c

 /******************************************************************//**
  * @file 		cpu.c
  * @brief 	This file is part of RT-Thread RTOS
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	Bernard, onelife
  * @version 	0.4 beta
  **********************************************************************

libcpu/arm/cortex-m3/fault.c

 /******************************************************************//**
  * @file 		fault.c
  * @brief 	This file is part of RT-Thread RTOS
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	Bernard, onelife
  * @version 	0.4 beta
  **********************************************************************

libcpu/arm/cortex-m3/fault_gcc.S

 /******************************************************************//**
  * @file 		fault_gcc.S
  * @brief 	Faults handling functions
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	Bernard, onelife
  * @version 	0.4 beta
  **********************************************************************

libcpu/arm/cortex-m3/interrupt.c

 /******************************************************************//**
  * @file 		interrupt.c
  * @brief 	This file is part of RT-Thread RTOS
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	Bernard, onelife
  * @version 	0.4 beta
  **********************************************************************

libcpu/arm/cortex-m3/stack.c

 /******************************************************************//**
  * @file 		stack.c
  * @brief 	This file is part of RT-Thread RTOS
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	Bernard, onelife
  * @version 	0.4 beta
  **********************************************************************

libcpu/arm/cortex-m3/start_gcc.S

 /******************************************************************//**
  * @file 		start_gcc.S
  * @brief 	Context switch functions
- * 	COPYRIGHT (C) 2009, RT-Thread Development Team
+ * 	COPYRIGHT (C) 2011, RT-Thread Development Team
  * @author 	onelife
  * @version 	0.4 beta
  **********************************************************************