add adc.c/adc.h to FM3 IAR project

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1318 bbd45198-f89e-11dd-88c7-29a3b14d5316

bsp/fm3/adc.c

+/*
+ * File      : adc.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2011, RT-Thread Develop Team
+ *
+ * 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
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-03-03     lgnq
+ */
+     
+#include <rtthread.h>
+#include <rthw.h>
+#include <rtgui/event.h>
+#include <rtgui/rtgui_server.h>
+#include <rtgui/rtgui_system.h>
+
+#include "mb9bf506r.h"
+#include "adc.h"
+
+static struct rt_device adc;
+
+static rt_err_t rt_adc_init(rt_device_t dev)
+{
+    RT_ASSERT(dev != RT_NULL);
+
+    if(!(dev->flag & RT_DEVICE_FLAG_ACTIVATED))
+    {
+	    /* I/O setting AN08 - P18 */
+        FM3_GPIO->ADE |= 0x100;
+	    FM3_GPIO->PFR1 = 0x100;
+	
+	    /* A/DC setting */
+	    FM3_ADC0->SCIS1 = 0x01;
+	    FM3_ADC0->ADSS1 = 0x00;				/* sampling timming ADST0 */
+	    FM3_ADC0->ADST1 = 0x43;
+	    FM3_ADC0->ADCT  = 0x02;
+	    FM3_ADC0->SCCR  = 0x10;				/* FIFO clear,single mode */
+	    FM3_ADC0->CMPCR = 0x00;				/* disable comparator */
+	
+	    /* starting A/DC */
+	    FM3_ADC0->SCCR |= 0x01;				/* A/DC start */
+        
+        dev->flag |= RT_DEVICE_FLAG_ACTIVATED;
+	}
+
+	return RT_EOK;
+}
+
+static rt_err_t rt_adc_control(rt_device_t dev, rt_uint8_t cmd, void *args)
+{
+	RT_ASSERT(dev != RT_NULL);
+
+	switch (cmd)
+	{
+	    case RT_DEVICE_CTRL_ADC_START:
+            FM3_ADC0->SCCR |= 0x1;
+		break;
+		
+	    case RT_DEVICE_CTRL_ADC_RESULT:
+            while(FM3_ADC0->ADSR & 0x1)
+                ;
+            *((rt_uint16_t*)args) = FM3_ADC0->SCFD;
+            *((rt_uint16_t*)args) = *((rt_uint16_t*)args) >> 6;
+            *((rt_uint16_t*)args) = (*((rt_uint16_t*)args)*3300)/1024;
+		break;
+	}
+
+	return RT_EOK;
+}
+
+extern rt_thread_t info_tid;
+rt_uint16_t adc_value;
+static void adc_thread_entry(void *parameter)
+{
+    rt_device_t device;
+    struct rtgui_event_command ecmd;
+    
+    RTGUI_EVENT_COMMAND_INIT(&ecmd);
+    ecmd.type = RTGUI_CMD_USER_INT;
+    ecmd.command_id = ADC_UPDATE;
+    device = rt_device_find("adc");
+    while(1)
+    {
+        rt_device_control(device, RT_DEVICE_CTRL_ADC_START, RT_NULL);    
+        rt_device_control(device, RT_DEVICE_CTRL_ADC_RESULT, &adc_value);
+        rtgui_thread_send(info_tid, &ecmd.parent, sizeof(ecmd));
+        rt_thread_delay(20);
+    }
+}
+
+static rt_thread_t adc_thread;
+void rt_hw_adc_init(void)
+{
+	adc.type 		= RT_Device_Class_Char; /* fixme: should be adc type */
+	adc.rx_indicate = RT_NULL;
+	adc.tx_complete = RT_NULL;
+	adc.init 		= rt_adc_init;
+	adc.open		= RT_NULL;
+	adc.close		= RT_NULL;
+	adc.read 		= RT_NULL;
+	adc.write 		= RT_NULL;
+	adc.control 	= rt_adc_control;
+	adc.user_data	= RT_NULL;
+
+    adc_thread = rt_thread_create("adc", adc_thread_entry, RT_NULL, 384, 29, 5);
+    if(adc_thread != RT_NULL) 
+        rt_thread_startup(adc_thread);
+    
+	/* register a character device */
+	rt_device_register(&adc, "adc", RT_DEVICE_FLAG_RDWR);
+}
+

bsp/fm3/adc.h

+/*
+ * File      : adc.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2011, RT-Thread Develop Team
+ *
+ * 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
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-03-03     lgnq
+ */
+ 
+#ifndef __ADC_H__
+#define __ADC_H__
+
+/* Exported constants ---------------------------------------------------------*/
+/* Exported macro -------------------------------------------------------------*/
+#define ADC_MODE_SINGLE 	0x00UL
+#define ADC_MODE_SCAN 		0x01UL
+#define ADC_MODE_TAILGATE	0x02UL
+
+#define RT_DEVICE_CTRL_ADC_START        0xF1       /* start ADC conversion */
+#define RT_DEVICE_CTRL_ADC_RESULT		0xF2		/* get ADC result */
+
+#define ADC_UPDATE 0
+
+/* Exported functions --------------------------------------------------------- */
+void rt_hw_adc_init(void);
+
+#endif /*__ADC_H__ */