1. /******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
2. * File Name : stm32f10x_vector.c
3. * Author : MCD Application Team
4. * Version : V2.0.3
5. * Date : 09/22/2008
6. * Description : STM32F10x vector table for EWARM5.x toolchain.
7. * This module performs:
8. * - Set the initial SP
9. * - Set the initial PC == __iar_program_start,
10. * - Set the vector table entries with the exceptions ISR address,
11. * - Configure external SRAM mounted on STM3210E-EVAL board
12. * to be used as data memory (optional, to be enabled by user)
13. * After Reset the Cortex-M3 processor is in Thread mode,
14. * priority is Privileged, and the Stack is set to Main.
15. ********************************************************************************
16. * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
17. * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
18. * AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
19. * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
20. * CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
21. * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
22. *******************************************************************************/
24. /* Includes ------------------------------------------------------------------*/
25. #include "stm32f10x_lib.h"
26. #include "stm32f10x_it.h"
28. /* Private typedef -----------------------------------------------------------*/
29. typedef void( *intfunc )( void );
30. typedef union { intfunc __fun; void * __ptr; } intvec_elem;
32. /* Private define ------------------------------------------------------------*/
33. /* Uncomment the following line if you need to use external SRAM mounted on
34. STM3210E-EVAL board as data memory */
35. /* #define DATA_IN_ExtSRAM */
37. /* Private macro -------------------------------------------------------------*/
38. /* Private variables ---------------------------------------------------------*/
39. /* Private function prototypes -----------------------------------------------*/
40. /* Private functions ---------------------------------------------------------*/
43. #pragma language=extended
44. #pragma segment="CSTACK"
46. void __iar_program_start( void );
48. #pragma location = ".intvec"
49. /* STM32F10x Vector Table entries */
50. const intvec_elem __vector_table[] =
51. {
52. { .__ptr = __sfe( "CSTACK" ) },
53. __iar_program_start,
54. NMIException,
55. HardFaultException,
56. MemManageException,
57. BusFaultException,
58. UsageFaultException,
59. 0, 0, 0, 0, /* Reserved */
60. SVCHandler,
61. DebugMonitor,
62. 0, /* Reserved */
63. PendSVC,
64. SysTickHandler,
65. WWDG_IRQHandler,
66. PVD_IRQHandler,
67. TAMPER_IRQHandler,
68. RTC_IRQHandler,
69. FLASH_IRQHandler,
70. RCC_IRQHandler,
71. EXTI0_IRQHandler,
72. EXTI1_IRQHandler,
73. EXTI2_IRQHandler,
74. EXTI3_IRQHandler,
75. EXTI4_IRQHandler,
76. DMA1_Channel1_IRQHandler,
77. DMA1_Channel2_IRQHandler,
78. DMA1_Channel3_IRQHandler,
79. DMA1_Channel4_IRQHandler,
80. DMA1_Channel5_IRQHandler,
81. DMA1_Channel6_IRQHandler,
82. DMA1_Channel7_IRQHandler,
83. ADC1_2_IRQHandler,
84. USB_HP_CAN_TX_IRQHandler,
85. USB_LP_CAN_RX0_IRQHandler,
86. CAN_RX1_IRQHandler,
87. CAN_SCE_IRQHandler,
88. EXTI9_5_IRQHandler,
89. TIM1_BRK_IRQHandler,
90. TIM1_UP_IRQHandler,
91. TIM1_TRG_COM_IRQHandler,
92. TIM1_CC_IRQHandler,
93. TIM2_IRQHandler,
94. TIM3_IRQHandler,
95. TIM4_IRQHandler,
96. I2C1_EV_IRQHandler,
97. I2C1_ER_IRQHandler,
98. I2C2_EV_IRQHandler,
99. I2C2_ER_IRQHandler,
100. SPI1_IRQHandler,
101. SPI2_IRQHandler,
102. USART1_IRQHandler,
103. USART2_IRQHandler,
104. USART3_IRQHandler,
105. EXTI15_10_IRQHandler,
106. RTCAlarm_IRQHandler,
107. USBWakeUp_IRQHandler,
108. TIM8_BRK_IRQHandler,
109. TIM8_UP_IRQHandler,
110. TIM8_TRG_COM_IRQHandler,
111. TIM8_CC_IRQHandler,
112. ADC3_IRQHandler,
113. FSMC_IRQHandler,
114. SDIO_IRQHandler,
115. TIM5_IRQHandler,
116. SPI3_IRQHandler,
117. UART4_IRQHandler,
118. UART5_IRQHandler,
119. TIM6_IRQHandler,
120. TIM7_IRQHandler,
121. DMA2_Channel1_IRQHandler,
122. DMA2_Channel2_IRQHandler,
123. DMA2_Channel3_IRQHandler,
124. DMA2_Channel4_5_IRQHandler,
125. };
127. #ifdef DATA_IN_ExtSRAM
128. #pragma language=extended
130. __interwork int __low_level_init(void);
132. #pragma location="ICODE"
133. __interwork int __low_level_init(void)
134. {
136. /* FSMC Bank1 NOR/SRAM3 is used for the STM3210E-EVAL, if another Bank is
137. required, then adjust the Register Addresses*/
139. /* Enable FSMC clock */
140. *(vu32 *)0x40021014 = 0x00000114;
142. /* Enable GPIOD, GPIOE, GPIOF and GPIOG clocks */
143. *(vu32 *)0x40021018 = 0x000001E0;
145. /* --------------- SRAM Data lines, NOE and NWE configuration ---------------*/
146. /*---------------- SRAM Address lines configuration -------------------------*/
147. /*---------------- NOE and NWE configuration --------------------------------*/
148. /*---------------- NE3 configuration ----------------------------------------*/
149. /*---------------- NBL0, NBL1 configuration ---------------------------------*/
151. *(vu32 *)0x40011400 = 0x44BB44BB;
152. *(vu32 *)0x40011404 = 0xBBBBBBBB;
154. *(vu32 *)0x40011800 = 0xB44444BB;
155. *(vu32 *)0x40011804 = 0xBBBBBBBB;
157. *(vu32 *)0x40011C00 = 0x44BBBBBB;
158. *(vu32 *)0x40011C04 = 0xBBBB4444;
160. *(vu32 *)0x40012000 = 0x44BBBBBB;
161. *(vu32 *)0x40012004 = 0x44444B44;
163. /*---------------- FSMC Configuration ---------------------------------------*/
164. /*---------------- Enable FSMC Bank1_SRAM Bank ------------------------------*/
166. *(vu32 *)0xA0000010 = 0x00001011;
167. *(vu32 *)0xA0000014 = 0x00000200;
170. return (1);
171. }
172. #endif /*DATA_IN_ExtSRAM*/
174. /******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/

typedef void( *intfunc )( void );

定義一個(gè)新類型，這個(gè)類型是一個(gè)函數(shù)指針，指針指向的函數(shù)類型是void (void)型，

符合標(biāo)準(zhǔn)C

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

定義一個(gè)新類型，這個(gè)類型是一個(gè)聯(lián)合體，聯(lián)合體有兩個(gè)元素，一個(gè)元素類型是intfunc,一個(gè)元素類型是void *

符合標(biāo)準(zhǔn)C

#pragma language=extended

#pragma segment="CSTACK"

void __iar_program_start( void );

申明外部函數(shù)，extern可以用，也可以不用

符合標(biāo)準(zhǔn)C

#pragma location = ".intvec" // 下面的變量存放在段 .intvec

//IAR擴(kuò)展

/* STM32F10x Vector Table entries */

const intvec_elem __vector_table[] =

{

{ .__ptr = __sfe( "CSTACK" ) },

// { .__ptr = 常量 },

// 數(shù)組元素是聯(lián)合體，聯(lián)合體有兩個(gè)元素，對(duì)聯(lián)合體元素__ptr賦初值

//符合標(biāo)準(zhǔn)C

//__sfe( "CSTACK" ) 是段CSTACK的尾地址，更準(zhǔn)確是段CSTACK下一個(gè)段的首地址（記憶中應(yīng)該是這樣）。

//IAR擴(kuò)展

__iar_program_start,

//數(shù)組元素是聯(lián)合體，聯(lián)合體有兩個(gè)元素，對(duì)聯(lián)合體第一個(gè)元素__fun賦初值

//完整的寫法是 { .__fun= __iar_program_start },

//這里簡(jiǎn)寫成__iar_program_start，是否符合標(biāo)準(zhǔn)C,有待考證

.....

}

}

補(bǔ)充：

對(duì)聯(lián)合體第一個(gè)元素賦初值，可以簡(jiǎn)寫。

{ .__fun= __iar_program_start },

//__fun是聯(lián)合體第一個(gè)元素，可直接簡(jiǎn)寫成__iar_program_start.

//符合標(biāo)準(zhǔn)C

__sfe是IAR的“段操作符”segment operator。表示取某個(gè)段的后一個(gè)字節(jié)的地址。

比如"CSTACK"定義為0x20001000~0x20001fff。那__sfe( "CSTACK" ) 就得到0x20002000這個(gè)值，剛好用來(lái)初始化msp堆棧指針。

注意使用segment operator前，需要先定義段名如下：

#pragma segment="CSTACK"