IAR for STM8中断问题.我的程序好像进不去中断,PC7控制LED,如能进去LED应该会亮

#include <iostm8l152c6.h>#include <intrinsics.h>void Port_Init(void){ PC_DDR_bit.DDR1 = 0; PC_CR1_bit.C11 = 1; PC_CR2_bit.C21 = 0; PC_DDR_bit.DDR7 = 1; PC_CR1_bit.C17 = 1; PC_CR2_bit.C27 = 0; }void TIM4_init(){ TIM4_IER = 0x00; ⼀⼀Disable timer4 interrupt TIM4_EGR = 0x01; ⼀⼀Update generation TIM4_PSCR = 0x07; ⼀⼀Prescaler value f = 8MHZ⼀512 TIM4_ARR = 255; TIM4_CNTR = 255; TIM4_CR1 = 0x01; ⼀⼀counter enable TIM4_IER = 0x01; ⼀⼀Enable timer4 interrupt}#pragma vector=TIM4_UIF_vector__interrupt void TIM4_UPD_OVF_IRQHandler(void){ TIM4_SR1 &=~0x01; PC_ODR_bit.ODR7 ^= 1;}void main(void){ __disable_interrupt(); CLK_CKDIVR = 0x00; Port_Init(); TIM4_init(); __enable_interrupt(); for(;;) {; } }}