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*** EFM32 branch ***

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1. Move file, "start_gcc.S", from "libcpu/arm/cortex-m3/" to "bsp/efm32/" 
2. Upgrade EFM32 driver libraries (CMSIS and efm32lib) to version 2.2.2 
3. Upgrade EFM32 G2xx development kit drivers (EFM32_Gxxx_DK) to version 1.7.2 (from version 1.6.0) 
4. Modify the files ("drv_usart.c" and "drv_iic.c") according to the driver libraries upgrading 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1818 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
onelife.real
2011-11-29 09:15:10 +00:00
parent 1b3411abde
commit ed9828226a
260 changed files with 1939491 additions and 18729 deletions
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88
libcpu/arm/cortex-m3/start_gcc.S
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@@ -1,88 +0,0 @@
/***************************************************************************//**
* @file start_gcc.S
* @brief Context switch functions
* 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
* 2010-12-21 onelife Initial creation for EFM32
* 2011-07-06 onelife Modify to make use the start code in libraries
******************************************************************************/
/***************************************************************************//**
* @addtogroup cortex-m3
* @{
*******************************************************************************/
.syntax unified
.cpu cortex-m3
.fpu softvfp
.thumb
/* start address for the initialization values of the .data section.
defined in linker script */
.word _sidata
/* start address for the .data section. defined in linker script */
.word _sdata
/* end address for the .data section. defined in linker script */
.word _edata
/* start address for the .bss section. defined in linker script */
.word _sbss
/* end address for the .bss section. defined in linker script */
.word _ebss
/***************************************************************************//**
* @brief This is the code that gets called when the processor first
* starts execution following a reset event. Only the absolutely
* necessary set is performed, after which the application
* supplied main() routine is called.
* @param None
* @retval None
*******************************************************************************/
.thumb
.thumb_func
.section .cs3.init,"ax", %progbits
.globl _start
.type _start, %function
_start:
/* Copy the data segment initializers from flash to SRAM */
movs r1, #0
b LoopCopyDataInit
CopyDataInit:
ldr r3, =_sidata
ldr r3, [r3, r1]
str r3, [r0, r1]
adds r1, r1, #4
LoopCopyDataInit:
ldr r0, =_sdata
ldr r3, =_edata
adds r2, r0, r1
cmp r2, r3
bcc CopyDataInit
ldr r2, =_sbss
b LoopFillZerobss
/* Zero fill the bss segment. */
FillZerobss:
movs r3, #0
str r3, [r2], #4
LoopFillZerobss:
ldr r3, = _ebss
cmp r2, r3
bcc FillZerobss
/* Call the application's entry point.*/
bl main
bx lr
.size _start, .-_start
/***************************************************************************//**
* @}
*******************************************************************************/