IAR的stm32f10x_vector.c文件的定义

/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name          : stm32f10x_vector.c
* Author             : MCD Application Team
* Version            : V2.0.3
* Date               : 09/22/2008
* Description        : STM32F10x vector table for EWARM5.x toolchain.
*                      This module performs:
*                      - Set the initial SP
*                      - Set the initial PC == __iar_program_start,
*                      - 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)
*                      After Reset the Cortex-M3 processor is in Thread mode,
*                      priority is Privileged, and the Stack is set to Main.
********************************************************************************
* 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.
*******************************************************************************/

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_lib.h"
#include "stm32f10x_it.h"

/* Private typedef -----------------------------------------------------------*/
typedef void( *intfunc )( void );
typedef union { intfunc __fun; void * __ptr; } intvec_elem;

/* Private define ------------------------------------------------------------*/
/* Uncomment the following line if you need to use external SRAM mounted on
STM3210E-EVAL board as data memory */
/* #define DATA_IN_ExtSRAM */

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/


#pragma language=extended
#pragma segment="CSTACK"

void __iar_program_start( void );

#pragma location = ".intvec"
/* STM32F10x Vector Table entries */
const intvec_elem __vector_table[] =
{
{ .__ptr = __sfe( "CSTACK" ) },
__iar_program_start,
NMIException,
HardFaultException,
MemManageException,
BusFaultException,
UsageFaultException,
0, 0, 0, 0,            /* Reserved */
SVCHandler,
DebugMonitor,
0,                      /* Reserved */
PendSVC,
SysTickHandler,
WWDG_IRQHandler,
PVD_IRQHandler,
TAMPER_IRQHandler,
RTC_IRQHandler,
FLASH_IRQHandler,
RCC_IRQHandler,
EXTI0_IRQHandler,
EXTI1_IRQHandler,
EXTI2_IRQHandler,
EXTI3_IRQHandler,
EXTI4_IRQHandler,
DMA1_Channel1_IRQHandler,
DMA1_Channel2_IRQHandler,
DMA1_Channel3_IRQHandler,
DMA1_Channel4_IRQHandler,
DMA1_Channel5_IRQHandler,
DMA1_Channel6_IRQHandler,
DMA1_Channel7_IRQHandler,
ADC1_2_IRQHandler,
USB_HP_CAN_TX_IRQHandler,
USB_LP_CAN_RX0_IRQHandler,
CAN_RX1_IRQHandler,
CAN_SCE_IRQHandler,
EXTI9_5_IRQHandler,
TIM1_BRK_IRQHandler,
TIM1_UP_IRQHandler,
TIM1_TRG_COM_IRQHandler,
TIM1_CC_IRQHandler,
TIM2_IRQHandler,
TIM3_IRQHandler,
TIM4_IRQHandler,
I2C1_EV_IRQHandler,
I2C1_ER_IRQHandler,
I2C2_EV_IRQHandler,
I2C2_ER_IRQHandler,
SPI1_IRQHandler,
SPI2_IRQHandler,
USART1_IRQHandler,
USART2_IRQHandler,
USART3_IRQHandler,
EXTI15_10_IRQHandler,
RTCAlarm_IRQHandler,
USBWakeUp_IRQHandler,
TIM8_BRK_IRQHandler,
TIM8_UP_IRQHandler,
TIM8_TRG_COM_IRQHandler,
TIM8_CC_IRQHandler,
ADC3_IRQHandler,
FSMC_IRQHandler,
SDIO_IRQHandler,
TIM5_IRQHandler,
SPI3_IRQHandler,
UART4_IRQHandler,
UART5_IRQHandler,
TIM6_IRQHandler,
TIM7_IRQHandler,
DMA2_Channel1_IRQHandler,
DMA2_Channel2_IRQHandler,
DMA2_Channel3_IRQHandler,
DMA2_Channel4_5_IRQHandler,
};

#ifdef DATA_IN_ExtSRAM
#pragma language=extended

__interwork int __low_level_init(void);

#pragma location="ICODE"
__interwork int __low_level_init(void)
{

/* FSMC Bank1 NOR/SRAM3 is used for the STM3210E-EVAL, if another Bank is
required, then adjust the Register Addresses*/

/* Enable FSMC clock */
*(vu32 *)0x40021014 = 0x00000114;

/* Enable GPIOD, GPIOE, GPIOF and GPIOG clocks */
*(vu32 *)0x40021018 = 0x000001E0;

/* ---------------  SRAM Data lines, NOE and NWE configuration ---------------*/
/*----------------  SRAM Address lines configuration -------------------------*/
/*----------------  NOE and NWE configuration --------------------------------*/
/*----------------  NE3 configuration ----------------------------------------*/
/*----------------  NBL0, NBL1 configuration ---------------------------------*/

*(vu32 *)0x40011400 = 0x44BB44BB;
*(vu32 *)0x40011404 = 0xBBBBBBBB;

*(vu32 *)0x40011800 = 0xB44444BB;
*(vu32 *)0x40011804 = 0xBBBBBBBB;

*(vu32 *)0x40011C00 = 0x44BBBBBB;
*(vu32 *)0x40011C04 = 0xBBBB4444;

*(vu32 *)0x40012000 = 0x44BBBBBB;
*(vu32 *)0x40012004 = 0x44444B44;

/*----------------  FSMC Configuration ---------------------------------------*/
/*----------------  Enable FSMC Bank1_SRAM Bank ------------------------------*/

*(vu32 *)0xA0000010 = 0x00001011;
*(vu32 *)0xA0000014 = 0x00000200;


return (1);
}
#endif /*DATA_IN_ExtSRAM*/

/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/

typedef void( *intfunc )( void );     

定义一个新类型，这个类型是一个函数指针，指针指向的函数类型是void  (void)型， 

符合标准C 

typedef union { intfunc __fun; void * __ptr; } intvec_elem;   

定义一个新类型，这个类型是一个联合体，联合体有两个元素，一个元素类型是intfunc,一个元素类型是void * 

符合标准C 

#pragma language=extended     

#pragma segment="CSTACK"  

void __iar_program_start( void );        

申明外部函数，extern可以用，也可以不用 

符合标准C 

#pragma location = ".intvec"     // 下面的变量存放在段 .intvec 

//IAR扩展 

/* STM32F10x Vector Table entries */  

const intvec_elem __vector_table[] =  

{  

  { .__ptr = __sfe( "CSTACK" ) },  

// { .__ptr = 常量 },     

// 数组元素是联合体，联合体有两个元素，对联合体元素__ptr赋初值 

//符合标准C 

//__sfe( "CSTACK" ) 是段CSTACK的尾地址，更准确是段CSTACK下一个段的首地址（记忆中应该是这样）。 

//IAR扩展 

 __iar_program_start,                 

//数组元素是联合体，联合体有两个元素，对联合体第一个元素__fun赋初值 

//完整的写法是  { .__fun= __iar_program_start }, 

//这里简写成__iar_program_start，是否符合标准C,有待考证 

  .....  

  }  

} 

补充： 

对联合体第一个元素赋初值，可以简写。 

{ .__fun= __iar_program_start },  

//__fun是联合体第一个元素，可直接简写成__iar_program_start. 

//符合标准C 

__sfe是IAR的“段操作符”segment operator。表示取某个段的后一个字节的地址。

比如"CSTACK"定义为0x20001000~0x20001fff。那__sfe( "CSTACK" ) 就得到0x20002000这个值，刚好用来初始化msp堆栈指针。

注意使用segment operator前，需要先定义段名如下：

#pragma segment="CSTACK"