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STM32外扩RAM做变量定义与内部RAM做堆栈的设置

说明：当STM32上运行UC/OSII和UC/GUI时，STM32内部自带的RAM可能不够用，这就需要STM32的外扩RAM功能，内部RAM作为中断服务程序的堆栈使用，而外部RAM 作为存放临时变量的地方和UC/OSII的任务切换用堆栈，具体配置如下：

1.修改启动代码

我使用的开发板外扩了512K字节的RAM，分配的地址为BANK1的第3个区，即起始地址为0x68000000，大小为0x80000

启动代码如下：

;* File Name : startup_stm32f10x_hd.s

;* Author : MCD Application Team

;* Version : V3.1.0

;

* Date : 06/19/2009

;* Description : STM32F10x High Density Devices 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-EV AL 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 SA VE 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-EV AL 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

能源污染;__initial_sp江苏电视台少儿频道

; If you need to use external SRAM mounted on STM3210E-EV AL board as data memory抓住幸福不撒手

; 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南京卫星电视

;// <h> Heap Configuration

;// <o> Heap Size (in Bytes) <0x0-0xFFFFFFFF:8>

;

// </h>2008扣篮大赛

Heap_Size EQU 0x00000400

AREA HEAP, NOINIT, READWRITE, ALIGN=3

__heap_base

Heap_Mem SPACE Heap_Size

__heap_limit

THUMB

PRESERVE8

; Vector Table Mapped to Address 0 at Reset

AREA RESET, DATA, READONLY

EXPORT __Vectors

EXPORT __Vectors_End

EXPORT __Vectors_Size

__Vectors DCD __initial_sp ; Top of Stack

DCD Reset_Handler ; Reset Handler

DCD NMI_Handler ; NMI Handler

DCD HardFault_Handler ; Hard Fault Handler

DCD MemManage_Handler ; MPU Fault Handler

DCD BusFault_Handler ; Bus Fault Handler

DCD UsageFault_Handler ; Usage Fault Handler

DCD 0 ; Reserved

DCD SVC_Handler ; SVCall Handler

DCD DebugMon_Handler ; Debug Monitor Handler

DCD 0 ; Reserved

DCD PendSV_Handler ; PendSV Handler

DCD SysTick_Handler ; SysTick Handler

; External Interrupts

DCD WWDG_IRQHandler ; Window Watchdog

DCD PVD_IRQHandler ; PVD through EXTI Line detect

DCD TAMPER_IRQHandler ; Tamper

DCD RTC_IRQHandler ; RTC

DCD FLASH_IRQHandler ; Flash

DCD RCC_IRQHandler ; RCC

DCD EXTI0_IRQHandler ; EXTI Line 0

DCD EXTI1_IRQHandler ; EXTI Line 1

DCD EXTI2_IRQHandler ; EXTI Line 2

DCD EXTI3_IRQHandler ; EXTI Line 3

DCD EXTI4_IRQHandler ; EXTI Line 4

DCD DMA1_Channel1_IRQHandler ; DMA1 Channel 1

DCD DMA1_Channel2_IRQHandler ; DMA1 Channel 2

DCD DMA1_Channel3_IRQHandler ; DMA1 Channel 3

DCD DMA1_Channel4_IRQHandler ; DMA1 Channel 4

DCD DMA1_Channel5_IRQHandler ; DMA1 Channel 5

DCD DMA1_Channel6_IRQHandler ; DMA1 Channel 6

DCD DMA1_Channel7_IRQHandler ; DMA1 Channel 7

DCD ADC1_2_IRQHandler ; ADC1 & ADC2

DCD USB_HP_CAN1_TX_IRQHandler ; USB High Priority or CAN1 TX

DCD USB_LP_CAN1_RX0_IRQHandler ; USB Low Priority or CAN1 RX0

DCD CAN1_RX1_IRQHandler ; CAN1 RX1

DCD CAN1_SCE_IRQHandler ; CAN1 SCE

DCD EXTI9_5_IRQHandler ; EXTI Line 9..5

DCD TIM1_BRK_IRQHandler ; TIM1 Break

DCD TIM1_UP_IRQHandler ; TIM1 Update

DCD TIM1_TRG_COM_IRQHandler ; TIM1 Trigger and Commutation

DCD TIM1_CC_IRQHandler ; TIM1 Capture Compare

DCD TIM2_IRQHandler ; TIM2

DCD TIM3_IRQHandler ; TIM3

DCD TIM4_IRQHandler ; TIM4

DCD I2C1_EV_IRQHandler ; I2C1 Event

DCD I2C1_ER_IRQHandler ; I2C1 Error

DCD I2C2_EV_IRQHandler ; I2C2 Event

DCD I2C2_ER_IRQHandler ; I2C2 Error

DCD SPI1_IRQHandler ; SPI1

DCD SPI2_IRQHandler ; SPI2

DCD USART1_IRQHandler ; USART1

DCD USART2_IRQHandler ; USART2

DCD USART3_IRQHandler ; USART3

DCD EXTI15_10_IRQHandler ; EXTI Line 15..10

DCD RTCAlarm_IRQHandler ; RTC Alarm through EXTI Line

DCD USBWakeUp_IRQHandler ; USB Wakeup from suspend

DCD TIM8_BRK_IRQHandler ; TIM8 Break

DCD TIM8_UP_IRQHandler ; TIM8 Update

DCD TIM8_TRG_COM_IRQHandler ; TIM8 Trigger and Commutation

DCD TIM8_CC_IRQHandler ; TIM8 Capture Compare

DCD ADC3_IRQHandler ; ADC3

DCD FSMC_IRQHandler ; FSMC

DCD SDIO_IRQHandler ; SDIO

DCD TIM5_IRQHandler ; TIM5

DCD SPI3_IRQHandler ; SPI3

DCD UART4_IRQHandler ; UART4

DCD UART5_IRQHandler ; UART5

DCD TIM6_IRQHandler ; TIM6

DCD TIM7_IRQHandler ; TIM7

DCD DMA2_Channel1_IRQHandler ; DMA2 Channel1

DCD DMA2_Channel2_IRQHandler ; DMA2 Channel2

DCD DMA2_Channel3_IRQHandler ; DMA2 Channel3

DCD DMA2_Channel4_5_IRQHandler ; DMA2 Channel4 & Channel5 __Vectors_End

__Vectors_Size EQU __Vectors_End - __Vectors

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-EV AL, 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

安贞医院护士被打

LDR R1,= 0x40011804

STR R0,[R1]

LDR R0,= 0x44BBBBBB

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