STM8 能把人折磨死

只看该作者 · 2010-10-12 15:22

单片机 STM8S903SK
程序如下：

定时器6初始化程序：
void timer6_50us(void)//配置1ms中断的寄存器状态
{
TIM6_EGR=0X01;
TIM6_ARR=0X64;
TIM6_PSCR=0X00;
TIM6_CR1=0X84;
TIM6_SR=0X00;
TIM6_IER=0X01;
TIM6_CR1|=0X01;
}

中断服务程序：
#include"stm8s903k3.h"
typedef void @far (*interrupt_handler_t)(void);
extern void _stext();    /* startup routine */
extern flag_tt;

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;
}
@far @interrupt void TIM6_UPD_OVF_TRG_IRQHandler()
{
  //TIM6_SR=0X00;
//flag1_tt=0x05;
  flag_tt=1;
  TIM6_SR=0X00;
return;
}

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, TIM6_UPD_OVF_TRG_IRQHandler}, /* irq23 */
{0x82, NonHandledInterrupt}, /* irq24 */
{0x82, NonHandledInterrupt}, /* irq25 */
{0x82, NonHandledInterrupt}, /* irq26 */
{0x82, NonHandledInterrupt}, /* irq27 */
{0x82, NonHandledInterrupt}, /* irq28 */
{0x82, NonHandledInterrupt}, /* irq29 */
};

主程序：
main()
{
  _asm("sim");
  clock_inti();
  io_inti();
_asm("rim");
timer6_50us();

while(1)
{
  if(flag_tt==1)
{PC_ODR|=0x80;}
else
{PC_ODR&=0x00;}
  }

}

程序可以完全跑起来，可是中断程序的时间标志位 flag_tt,按道理在走完中断程序后应该置为位了。可是实际跑完后，该标志还是0，哪个大哥有碰到相同的问题，请指教一下吧！！！！！！！！！！！！！！