STM32微控制器启动代码
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深刻理解汇编语言到c的环境
;******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
;* File Name : stm32f10x_vector.s
;* Author : MCD Application Team
;* Version : V2.0.3
;* Date : 09/22/2008
;* Description : STM32F10x vector table for RVMDK toolchain.
;* This module performs:
;* - Set the initial SP
;* - Set the initial PC == Reset_Handler
;* - Set the vector table entries with the exceptions ISR address
;* - Configure external SRAM mounted on STM3210E-EVAL board
;* to be used as data memory (optional, to be enabled by user)
;* - Branches to __main in the C library (which eventually
;* calls main()).
;* After Reset the CortexM3 processor is in Thread mode,
;* priority is Privileged, and the Stack is set to Main.
;* <<< Use Configuration Wizard in Context Menu >>>
;*******************************************************************************
; THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
; WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
; AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
; INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
; CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
; INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
;*******************************************************************************
; If you need to use external SRAM mounted on STM3210E-EVAL board as data memory,
; change the following define value to '1' (or choose ENABLE in Configuration Wizard window)
;// <o> External SRAM Configuration <0=> DISABLE <1=> ENABLE
DATA_IN_ExtSRAM EQU 1
; Amount of memory (in bytes) allocated for Stack
; Tailor this value to your application needs
;// <h> Stack Configuration
;// <o> Stack Size (in Bytes) <0x0-0xFFFFFFFF:8>
;// </h>
Stack_Size EQU 0x00000400
AREA STACK, NOINIT, READWRITE, ALIGN=3
Stack_Mem SPACE Stack_Size
__initial_sp
; If you need to use external SRAM mounted on STM3210E-EVAL board as data memory
; and internal SRAM for Stack, uncomment the following line and comment the line above
;__initial_sp EQU 0x20000000 + Stack_Size ; "Use MicroLIB" must be checked in
; the Project->Options->Target window
; Amount of memory (in bytes) allocated for Heap
; Tailor this value to your application needs
;// <h> Heap Configuration
;// <o> Heap Size (in Bytes) <0x0-0xFFFFFFFF:8>
;// </h>
;Heap_Size EQU 0x00000400
Heap_Size EQU 0x00080000
AREA HEAP, NOINIT, READWRITE, ALIGN=3
__heap_base
Heap_Mem SPACE Heap_Size
__heap_limit
THUMB
PRESERVE8
; Import exceptions handlers
IMPORT NMIException
IMPORT HardFaultException
IMPORT MemManageException
IMPORT BusFaultException
IMPORT UsageFaultException
IMPORT SVCHandler
IMPORT DebugMonitor
IMPORT PendSVC
IMPORT SysTickHandler
IMPORT WWDG_IRQHandler
IMPORT PVD_IRQHandler
IMPORT TAMPER_IRQHandler
IMPORT RTC_IRQHandler
IMPORT FLASH_IRQHandler
IMPORT RCC_IRQHandler
IMPORT EXTI0_IRQHandler
IMPORT EXTI1_IRQHandler
IMPORT EXTI2_IRQHandler
IMPORT EXTI3_IRQHandler
IMPORT EXTI4_IRQHandler
IMPORT DMA1_Channel1_IRQHandler
IMPORT DMA1_Channel2_IRQHandler
IMPORT DMA1_Channel3_IRQHandler
IMPORT DMA1_Channel4_IRQHandler
IMPORT DMA1_Channel5_IRQHandler
IMPORT DMA1_Channel6_IRQHandler
IMPORT DMA1_Channel7_IRQHandler
IMPORT ADC1_2_IRQHandler
IMPORT USB_HP_CAN_TX_IRQHandler
IMPORT USB_LP_CAN_RX0_IRQHandler
IMPORT CAN_RX1_IRQHandler
IMPORT CAN_SCE_IRQHandler
IMPORT EXTI9_5_IRQHandler
IMPORT TIM1_BRK_IRQHandler
IMPORT TIM1_UP_IRQHandler
IMPORT TIM1_TRG_COM_IRQHandler
IMPORT TIM1_CC_IRQHandler
IMPORT TIM2_IRQHandler
IMPORT TIM3_IRQHandler
IMPORT TIM4_IRQHandler
IMPORT I2C1_EV_IRQHandler
IMPORT I2C1_ER_IRQHandler
IMPORT I2C2_EV_IRQHandler
IMPORT I2C2_ER_IRQHandler
IMPORT SPI1_IRQHandler
IMPORT SPI2_IRQHandler
IMPORT USART1_IRQHandler
IMPORT USART2_IRQHandler
IMPORT USART3_IRQHandler
IMPORT EXTI15_10_IRQHandler
IMPORT RTCAlarm_IRQHandler
IMPORT USBWakeUp_IRQHandler
IMPORT TIM8_BRK_IRQHandler
IMPORT TIM8_UP_IRQHandler
IMPORT TIM8_TRG_COM_IRQHandler
IMPORT TIM8_CC_IRQHandler
IMPORT ADC3_IRQHandler
IMPORT FSMC_IRQHandler
IMPORT SDIO_IRQHandler
IMPORT TIM5_IRQHandler
IMPORT SPI3_IRQHandler
IMPORT UART4_IRQHandler
IMPORT UART5_IRQHandler
IMPORT TIM6_IRQHandler
IMPORT TIM7_IRQHandler
IMPORT DMA2_Channel1_IRQHandler
IMPORT DMA2_Channel2_IRQHandler
IMPORT DMA2_Channel3_IRQHandler
IMPORT DMA2_Channel4_5_IRQHandler
;*******************************************************************************
; Fill-up the Vector Table entries with the exceptions ISR address
;*******************************************************************************
AREA RESET, DATA, READONLY
EXPORT __Vectors
__Vectors DCD __initial_sp ; Top of Stack
DCD Reset_Handler
DCD NMIException
DCD HardFaultException
DCD MemManageException
DCD BusFaultException
DCD UsageFaultException
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD 0 ; Reserved
DCD SVCHandler
DCD DebugMonitor
DCD 0 ; Reserved
DCD PendSVC
DCD SysTickHandler
DCD WWDG_IRQHandler
DCD PVD_IRQHandler
DCD TAMPER_IRQHandler
DCD RTC_IRQHandler
DCD FLASH_IRQHandler
DCD RCC_IRQHandler
DCD EXTI0_IRQHandler
DCD EXTI1_IRQHandler
DCD EXTI2_IRQHandler
DCD EXTI3_IRQHandler
DCD EXTI4_IRQHandler
DCD DMA1_Channel1_IRQHandler
DCD DMA1_Channel2_IRQHandler
DCD DMA1_Channel3_IRQHandler
DCD DMA1_Channel4_IRQHandler
DCD DMA1_Channel5_IRQHandler
DCD DMA1_Channel6_IRQHandler
DCD DMA1_Channel7_IRQHandler
DCD ADC1_2_IRQHandler
DCD USB_HP_CAN_TX_IRQHandler
DCD USB_LP_CAN_RX0_IRQHandler
DCD CAN_RX1_IRQHandler
DCD CAN_SCE_IRQHandler
DCD EXTI9_5_IRQHandler
DCD TIM1_BRK_IRQHandler
DCD TIM1_UP_IRQHandler
DCD TIM1_TRG_COM_IRQHandler
DCD TIM1_CC_IRQHandler
DCD TIM2_IRQHandler
DCD TIM3_IRQHandler
DCD TIM4_IRQHandler
DCD I2C1_EV_IRQHandler
DCD I2C1_ER_IRQHandler
DCD I2C2_EV_IRQHandler
DCD I2C2_ER_IRQHandler
DCD SPI1_IRQHandler
DCD SPI2_IRQHandler
DCD USART1_IRQHandler
DCD USART2_IRQHandler
DCD USART3_IRQHandler
DCD EXTI15_10_IRQHandler
DCD RTCAlarm_IRQHandler
DCD USBWakeUp_IRQHandler
DCD TIM8_BRK_IRQHandler
DCD TIM8_UP_IRQHandler
DCD TIM8_TRG_COM_IRQHandler
DCD TIM8_CC_IRQHandler
DCD ADC3_IRQHandler
DCD FSMC_IRQHandler
DCD SDIO_IRQHandler
DCD TIM5_IRQHandler
DCD SPI3_IRQHandler
DCD UART4_IRQHandler
DCD UART5_IRQHandler
DCD TIM6_IRQHandler
DCD TIM7_IRQHandler
DCD DMA2_Channel1_IRQHandler
DCD DMA2_Channel2_IRQHandler
DCD DMA2_Channel3_IRQHandler
DCD DMA2_Channel4_5_IRQHandler
AREA |.text|, CODE, READONLY
; Reset handler routine
Reset_Handler PROC
EXPORT Reset_Handler
IF DATA_IN_ExtSRAM == 1
; FSMC Bank1 NOR/SRAM3 is used for the STM3210E-EVAL, if another Bank is
; required, then adjust the Register Addresses
; Enable FSMC clock
LDR R0,= 0x00000114
LDR R1,= 0x40021014
STR R0,[R1]
; Enable GPIOD, GPIOE, GPIOF and GPIOG clocks
LDR R0,= 0x000001E0
LDR R1,= 0x40021018
STR R0,[R1]
; SRAM Data lines, NOE and NWE configuration
; SRAM Address lines configuration
; NOE and NWE configuration
; NE3 configuration
; NBL0, NBL1 configuration
LDR R0,= 0x44BB44BB
LDR R1,= 0x40011400
STR R0,[R1]
LDR R0,= 0xBBBBBBBB
LDR R1,= 0x40011404
STR R0,[R1]
LDR R0,= 0xB44444BB
LDR R1,= 0x40011800
STR R0,[R1]
LDR R0,= 0xBBBBBBBB
LDR R1,= 0x40011804
STR R0,[R1]
LDR R0,= 0x44BBBBBB
LDR R1,= 0x40011C00
STR R0,[R1]
LDR R0,= 0xBBBB4444
LDR R1,= 0x40011C04
STR R0,[R1]
LDR R0,= 0x44BBBBBB
LDR R1,= 0x40012000
STR R0,[R1]
LDR R0,= 0x44444B44
LDR R1,= 0x40012004
STR R0,[R1]
; FSMC Configuration
; Enable FSMC Bank1_SRAM Bank
LDR R0,= 0x00001011
LDR R1,= 0xA0000010
STR R0,[R1]
LDR R0,= 0x00000200
LDR R1,= 0xA0000014
STR R0,[R1]
ENDIF
IMPORT __main
LDR R0, =__main
BX R0
ENDP
ALIGN
;*******************************************************************************
; User Stack and Heap initialization
;*******************************************************************************
IF :DEF:__MICROLIB
EXPORT __initial_sp
EXPORT __heap_base
EXPORT __heap_limit
ELSE
IMPORT __use_two_region_memory
EXPORT __user_initial_stackheap
__user_initial_stackheap
LDR R0, = Heap_Mem
LDR R1, =(Stack_Mem + Stack_Size)
LDR R2, = (Heap_Mem + Heap_Size)
LDR R3, = Stack_Mem
BX LR
ALIGN
ENDIF
END
;******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE*****
上面文件时启动文件汇编文件
在运行c代码环境时要做好以下工作:
1.分配堆和栈
栈在下面内存位置,堆在上面内存位置,在此文件中利用外部的外扩的RAM来做堆区,程序中定义的全局的变量和malloc出来的内存空间多放在外部扩展的RAM中。
2.控制器启动的要求
控制器在启动的时候要做硬件中断的入口映射地址这里有很多中断的地址多在这里,启动启动从0开始跳到复位地址,初始化emc 外挂RAM,rom等的时钟和管脚
我用来测是分配内存能否成功下面是main代码:
int main(void)
{
char buf[10];
char *gjk;
#ifdef DEBUG
debug();
#endif
/* System Clocks Configuration */
RCC_Configuration();
/* NVIC Configuration */
NVIC_Configuration();
for (Index = 0; Index <1024 ; Index++)
{
Tab[Index] =Index;
}
TabAddr = (u32)Tab; /* should be 0x680000xx */
/* Get main stack pointer value */
MSPValue = __MRS_MSP(); /* should be 0x2000xxxx */
/* Infinite loop */
gjk = (char*)malloc(240*1024);
if(gjk)
{
memset(gjk,0xa5,240*1024);
}
while (1)
{
}
}
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