STM8_interrupt_vector学习_1

新建一个新的Stm8工程它会自动生成一个main.c和一个stm8_interrupt_vector.c文件。

空白的main.c文件时如下所示的：

/* MAIN.C file
 * 
 * Copyright (c) 2002-2005 STMicroelectronics
 */


main()
{
	while (1);
}

新的空白的stm8_interrupt_vector.c是如下面所示的：

/*	BASIC INTERRUPT VECTOR TABLE FOR STM8 devices
 *	Copyright (c) 2007 STMicroelectronics
 */

typedef void @far (*interrupt_handler_t)(void);

struct interrupt_vector {
	unsigned char interrupt_instruction;
	interrupt_handler_t interrupt_handler;
};

@far @interrupt void NonHandledInterrupt (void)
{
	/* in order to detect unexpected events during development, 
	   it is recommended to set a breakpoint on the following instruction
	*/
	return;
}

extern void _stext();     /* startup routine */

struct interrupt_vector const _vectab[] = {
	{0x82, (interrupt_handler_t)_stext}, /* reset */
	{0x82, NonHandledInterrupt}, /* trap  */
	{0x82, NonHandledInterrupt}, /* irq0  */
	{0x82, NonHandledInterrupt}, /* irq1  */
	{0x82, NonHandledInterrupt}, /* irq2  */
	{0x82, NonHandledInterrupt}, /* irq3  */
	{0x82, NonHandledInterrupt}, /* irq4  */
	{0x82, NonHandledInterrupt}, /* irq5  */
	{0x82, NonHandledInterrupt}, /* irq6  */
	{0x82, NonHandledInterrupt}, /* irq7  */
	{0x82, NonHandledInterrupt}, /* irq8  */
	{0x82, NonHandledInterrupt}, /* irq9  */
	{0x82, NonHandledInterrupt}, /* irq10 */
	{0x82, NonHandledInterrupt}, /* irq11 */
	{0x82, NonHandledInterrupt}, /* irq12 */
	{0x82, NonHandledInterrupt}, /* irq13 */
	{0x82, NonHandledInterrupt}, /* irq14 */
	{0x82, NonHandledInterrupt}, /* irq15 */
	{0x82, NonHandledInterrupt}, /* irq16 */
	{0x82, NonHandledInterrupt}, /* irq17 */
	{0x82, NonHandledInterrupt}, /* irq18 */
	{0x82, NonHandledInterrupt}, /* irq19 */
	{0x82, NonHandledInterrupt}, /* irq20 */
	{0x82, NonHandledInterrupt}, /* irq21 */
	{0x82, NonHandledInterrupt}, /* irq22 */
	{0x82, NonHandledInterrupt}, /* irq23 */
	{0x82, NonHandledInterrupt}, /* irq24 */
	{0x82, NonHandledInterrupt}, /* irq25 */
	{0x82, NonHandledInterrupt}, /* irq26 */
	{0x82, NonHandledInterrupt}, /* irq27 */
	{0x82, NonHandledInterrupt}, /* irq28 */
	{0x82, NonHandledInterrupt}, /* irq29 */
};

其实在前几天我一直不理解为什么他的中断向量函数中这样写，在搜索了网上大家的解答，加上自己看芯片手册理解后，我略懂了。

在技术文档PM0044中这样说道

再结合芯片手册中中断向量映像表，如下图所示

结合起来的话我们就能够理解

struct interrupt_vector const _vectab[] 

这个结构体的定义是完全和芯片手册对应起来的。

虽然这个我理解了，也理解了这种定义方法，但是前面的那种结构体函数指针的定义还是没有搞明白，继续看文档。