Modified fomat and add low power

bsp/apollo2/README.md

 Apollo2 MCU是基于Ambiq Micro的Apollo MCU产品系列的第二代控制器。
-Ambiq使用专利亚阈值功率优化技术（Subthreshold Power Optimized Technology， SPOT）平台来实现惊人的功耗降低，其功耗通常比性能相近的其它MCU产品降低5至10倍。 
-Apollo2 MCU采用32位ARM Cortex-M4F微控制器，集成了高达1 MB的闪存和256 KB的RAM，以适应无线电和传感器开销，同时仍留有足够的应用代码空间。
+Ambiq使用专利亚阈值功率优化技术（Subthreshold Power Optimized Technology， SPOT）平台来实现惊人的功耗降低，其功耗通常比性能相近的其它MCU产品降低5至10倍。
+Apollo2 MCU采用32位ARM Cortex-M4F微控制器，集成了高达1 MB的闪存和256 KB的RAM，以适应无线电和传感器开销，同时仍留有足够的应用代码空间。该微控制器还包括串行主机和UART端口，用于与无线电和传感器通信，包括加速度计，陀螺仪和磁力计。
 
-board info:Apollo2 Evaluation Board（http://ambiqmicro.com/apollo-ultra-low-power-mcu/apollo2-mcu-20170703/）
\ No newline at end of file
+Features
+Ultra-low supply current
+    10 μA/MHz executing from flash at 3.3 V
+    10 μA/MHz executing from RAM at 3.3 V
+
+High-performance ARM Cortex-M4 Processor
+    Up to 48 MHz clock frequency
+    Floating point unit
+    Memory protection unit
+    Wake-up interrupt controller with 32 interrupts
+    
+Ultra-low power memory:
+    Up to 1 MB of flash memory for code/data
+    Up to 256 KB of low leakage RAM for code/data
+    16kB 1 or 2-way Associative Cache
+
+Ultra-low power interface for off-chip sensors:
+    14 bit, 15-channel, up to 1.2 MS/s ADC
+    Voltage Comparator
+    Temperature sensor with +/-2C accuracy
+
+Flexible serial peripherals:
+    6x I2C/SPI master for communication with sensors,?radios, and other peripherals
+    1x I2C/SPI slave for host communications
+    2x UART for communication with peripherals and?legacy devices
+    PDM for mono and stereo audio microphone
+
+Rich set of clock sources:
+    32.768 kHz XTAL oscillator
+    Low frequency RC oscillator – 1.024 kHz
+    High frequency RC oscillator – 48 MHz
+    RTC based on Ambiq’s AM08X5/18X5 families
+
+Wide operating range: 1.8-3.6 V, –40 to 85°C
+
+Compact package options:
+    2.5 x 2.5 mm 49-pin CSP with 34 GPIO
+    4.5 x 4.5 mm 64-pin BGA with 50 GPIO
+
+Board info
+    Apollo2 Evaluation Board（http://ambiqmicro.com/apollo-ultra-low-power-mcu/apollo2-mcu-20170703/）
\ No newline at end of file

bsp/apollo2/applications/SConscript

@@ -2,8 +2,8 @@ Import('RTT_ROOT')
 Import('rtconfig')
 from building import *
 
-cwd     = os.path.join(str(Dir('#')), 'applications')
-src	= Glob('*.c')
+cwd = os.path.join(str(Dir('#')), 'applications')
+src = Glob('*.c')
 CPPPATH = [cwd, str(Dir('#'))]
 
 group = DefineGroup('Applications', src, depend = [''], CPPPATH = CPPPATH)

bsp/apollo2/applications/main.c

 /*
- * File      : application.c
+ * File      : main.c
  * This file is part of RT-Thread RTOS
  * COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
  *
@@ -23,7 +23,7 @@
  */
 
 #include <rtthread.h>
-#include <stdint.h>
+
 #ifdef RT_USING_FINSH
 #include <finsh.h>
 #include <shell.h>

bsp/apollo2/board/Sconscript

@@ -2,8 +2,8 @@ Import('RTT_ROOT')
 Import('rtconfig')
 from building import *
 
-cwd     = GetCurrentDir()
-src	= Glob('*.c')
+cwd = GetCurrentDir()
+src = Glob('*.c')
 CPPPATH = [cwd]
 
 #remove other no use files

bsp/apollo2/board/board.c

 /*
  * File      : board.c
  * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2009 RT-Thread Develop Team
+ * COPYRIGHT (C) 2006 - 2017, RT-Thread Development 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
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Change Logs:
  * Date           Author       Notes
@@ -19,11 +29,23 @@
 #include "am_mcu_apollo.h"
 #include "hal/am_hal_clkgen.h"
 #include "hal/am_hal_cachectrl.h"
-#include "hw_uart.h"
+#include "uart.h"
+#include "led.h"
+
+#ifdef __CC_ARM
+extern int Image$$RW_IRAM1$$ZI$$Limit;
+#define AM_SRAM_BEGIN    (&Image$$RW_IRAM1$$ZI$$Limit)
+#elif __ICCARM__
+#pragma section="HEAP"
+#define AM_SRAM_BEGIN    (__segment_end("HEAP"))
+#else
+extern int __bss_end;
+#define NRF_SRAM_BEGIN    (&__bss_end)
+#endif
 
 #define TICK_RATE_HZ  RT_TICK_PER_SECOND
 #define SYSTICK_CLOCK_HZ  ( 32768UL )
-#define WAKE_INTERVAL ( (uint32_t) ((SYSTICK_CLOCK_HZ / TICK_RATE_HZ)) )
+#define WAKE_INTERVAL ( (uint32_t) ((SYSTICK_CLOCK_HZ / TICK_RATE_HZ)))
 
 /**
  * This is the timer interrupt service routine.
@@ -34,16 +56,16 @@ void am_stimer_cmpr0_isr(void)
     /* Check the timer interrupt status */
     am_hal_stimer_int_clear(AM_HAL_STIMER_INT_COMPAREA);
     am_hal_stimer_compare_delta_set(0, WAKE_INTERVAL);
-	
+
     if (rt_thread_self() != RT_NULL)
     {
-    	/* enter interrupt */
-    	rt_interrupt_enter();
+        /* enter interrupt */
+        rt_interrupt_enter();
 
-    	rt_tick_increase();
+        rt_tick_increase();
 
-    	/* leave interrupt */
-    	rt_interrupt_leave();
+        /* leave interrupt */
+        rt_interrupt_leave();
     }
 }
 
@@ -53,13 +75,10 @@ void am_stimer_cmpr0_isr(void)
  */
 void SysTick_Configuration(void)
 {
-		/* Set the main clk */
-    am_hal_clkgen_sysclk_select(AM_HAL_CLKGEN_SYSCLK_MAX);
-	
     /* Enable compare A interrupt in STIMER */
     am_hal_stimer_int_enable(AM_HAL_STIMER_INT_COMPAREA);
 
-    /* Enable the timer interrupt in the NVIC */
+    /* Enable the timer interrupt in the NVIC, making sure to use the appropriate priority level */
     am_hal_interrupt_enable(AM_HAL_INTERRUPT_STIMER_CMPR0);
 
     /* Configure the STIMER and run */
@@ -69,15 +88,6 @@ void SysTick_Configuration(void)
                          AM_HAL_STIMER_CFG_COMPARE_A_ENABLE);
 }
 
-/**
- * This is the CacheCtrl Enable.
- *
- */
-void CacheCtrl_Enable(void)
-{
-    am_hal_cachectrl_enable(&am_hal_cachectrl_defaults);
-}
-
 /**
  * This is the low power operation.
  * This function enables several power-saving features of the MCU, and
@@ -100,7 +110,7 @@ void am_low_power_init(void)
 
     /* Stop the XT and LFRC */
     am_hal_clkgen_osc_stop(AM_HAL_CLKGEN_OSC_XT);
-    // am_hal_clkgen_osc_stop(AM_HAL_CLKGEN_OSC_LFRC);
+    am_hal_clkgen_osc_stop(AM_HAL_CLKGEN_OSC_LFRC);
 
     /* Disable the RTC */
     am_hal_rtc_osc_disable();
@@ -112,7 +122,11 @@ void am_low_power_init(void)
  */
 void deep_power_save(void)
 {
-		am_hal_sysctrl_sleep(AM_HAL_SYSCTRL_SLEEP_DEEP);
+    am_hal_interrupt_master_disable();
+
+    am_hal_sysctrl_sleep(AM_HAL_SYSCTRL_SLEEP_DEEP);
+
+    am_hal_interrupt_master_enable();
 }
 
 /**
@@ -120,27 +134,48 @@ void deep_power_save(void)
  */
 void rt_hw_board_init(void)
 {
-		/* Set the clock frequency */
-    SysTick_Configuration();
-	
-		/* Set the default cache configuration */
-		CacheCtrl_Enable();
+    /* Set the system clock to maximum frequency */
+    am_hal_clkgen_sysclk_select(AM_HAL_CLKGEN_SYSCLK_MAX);
+
+    /* Set the default cache configuration */
+    am_hal_cachectrl_enable(&am_hal_cachectrl_defaults);
 
     /* Configure the board for low power operation */
-    //am_low_power_init();
-	
-#ifdef RT_USING_IDLE_HOOK	
-    rt_thread_idle_sethook(deep_power_save);  
+    am_low_power_init();
+
+    /* Config SysTick */
+    SysTick_Configuration();
+
+#ifdef RT_USING_IDLE_HOOK
+    /* Set sleep deep mode */
+    rt_thread_idle_sethook(deep_power_save);
+
+#ifndef NO_FPU
+    /* Enable the floating point module, and configure the core for lazy stacking */
+    am_hal_sysctrl_fpu_enable();
+    am_hal_sysctrl_fpu_stacking_enable(true);
+#else
+    am_hal_sysctrl_fpu_disable();
+#endif
+
+    /* Turn off unused Flash & SRAM */
+    am_hal_pwrctrl_memory_enable(AM_HAL_PWRCTRL_MEMEN_FLASH512K);
+    am_hal_pwrctrl_memory_enable(AM_HAL_PWRCTRL_MEMEN_SRAM32K);
+
 #endif
-	
+
 #ifdef RT_USING_CONSOLE
-		rt_hw_uart_init();
+    rt_hw_uart_init();
     rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
 #endif
 
 #ifdef RT_USING_COMPONENTS_INIT
     rt_components_board_init();
 #endif
+
+#ifdef RT_USING_HEAP
+    rt_system_heap_init((void*)AM_SRAM_BEGIN, (void*)AM_SRAM_END);
+#endif
 }
 
 /*@}*/

bsp/apollo2/board/board.h

+/*
+ * File      : board.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2017-09-14     Haley        first implementation
+ */
 #ifndef __BOARD_H_
 #define __BOARD_H_
 
 #include <rtthread.h>
 
 // <o> Internal SRAM memory size[Kbytes] <8-256>
-//	<i>Default: 256
+// <i>Default: 256
 #define AM_SRAM_SIZE         256
 #define AM_SRAM_END          (0x10000000 + AM_SRAM_SIZE * 1024)
 
 /* USART driver select. */
 #define RT_USING_UART0
-#define RT_USING_UART1
+//#define RT_USING_UART1
+
+/* LED driver select. */
+#define RT_USING_LED0
+//#define RT_USING_LED1
+//#define RT_USING_LED2
+//#define RT_USING_LED3
 
 void rt_hw_board_init(void);
 

bsp/apollo2/board/led.c

@@ -43,6 +43,7 @@
  */
 void rt_hw_led_on(rt_uint8_t LEDNum)
 {
+#ifdef RT_USING_PIN
     if(LEDNum == 0)
         rt_pin_write(AM_GPIO_LED0, PIN_LOW);
 
@@ -54,6 +55,7 @@ void rt_hw_led_on(rt_uint8_t LEDNum)
 
     else if(LEDNum == 3)
         rt_pin_write(AM_GPIO_LED3, PIN_LOW);
+#endif
 }
 
 /**
@@ -67,6 +69,7 @@ void rt_hw_led_on(rt_uint8_t LEDNum)
  */
 void rt_hw_led_off(rt_uint8_t LEDNum)
 {
+#ifdef RT_USING_PIN
     if(LEDNum == 0)
         rt_pin_write(AM_GPIO_LED0, PIN_HIGH);
 
@@ -78,6 +81,7 @@ void rt_hw_led_off(rt_uint8_t LEDNum)
 
     else if(LEDNum == 3)
         rt_pin_write(AM_GPIO_LED3, PIN_HIGH);
+#endif
 }
 
 /**
@@ -91,6 +95,7 @@ void rt_hw_led_off(rt_uint8_t LEDNum)
  */
 int rt_hw_led_init(void)
 {
+#ifdef RT_USING_PIN
 #if defined(RT_USING_LED0)
     /* config led */
     rt_pin_mode(AM_GPIO_LED0, PIN_MODE_OUTPUT);
@@ -122,10 +127,10 @@ int rt_hw_led_init(void)
     /* turns off the led */
     rt_hw_led_off(3);
 #endif /* RT_USING_LED1 */
-
+#endif
     return 0;
 }
-#ifdef RT_USING_PIN
+#ifdef RT_USING_COMPONENTS_INIT
 INIT_BOARD_EXPORT(rt_hw_led_init);
 #endif
 

bsp/apollo2/rtconfig.h

@@ -16,14 +16,14 @@
 
 /* SECTION: RT_DEBUG */
 /* Thread Debug */
-#define RT_DEBUG
+//#define RT_DEBUG
 //#define RT_DEBUG_INIT 1
-#define RT_USING_OVERFLOW_CHECK
+//#define RT_USING_OVERFLOW_CHECK
 
 /* Using Hook */
 //#define RT_USING_HOOK
 
-//#define RT_USING_IDLE_HOOK
+#define RT_USING_IDLE_HOOK
 
 #define IDLE_THREAD_STACK_SIZE	384
 
@@ -60,6 +60,9 @@
 #define RT_USING_SMALL_MEM
 #define RT_USING_TINY_SIZE
 
+/* Using USER MAIN */
+#define RT_USING_USER_MAIN
+
 // <bool name="RT_USING_COMPONENTS_INIT" description="Using RT-Thread components initialization" default="true" />
 #define RT_USING_COMPONENTS_INIT
 
@@ -78,13 +81,16 @@
 // <string name="RT_CONSOLE_DEVICE_NAME" description="The device name for console" default="uart1" />
 #define RT_CONSOLE_DEVICE_NAME	    "uart0"
 
+/* Using GPIO pin framework */
+#define RT_USING_PIN
+
 // #define RT_USING_SPI
 
 /* SECTION: finsh, a C-Express shell */
 #define RT_USING_FINSH
 /* configure finsh parameters */
 #define FINSH_THREAD_PRIORITY 6
-#define FINSH_THREAD_STACK_SIZE	512
+#define FINSH_THREAD_STACK_SIZE	1024
 #define FINSH_HISTORY_LINES	1
 /* Using symbol table */
 #define FINSH_USING_SYMTAB