STM8定时器1捕获PWM频率及占空比寄存器版

#include "capture.h" #include "uart.h" _Bool IsOk_Flag = 0; unsigned long high = 0; unsigned long total = 0; //16M 测量范围 265Hz-----48KHz //1M 测量范围 17Hz-----37KHz void TIM1_Capture1_Init( void ) { TIM1_ARRH = ( unsigned char )( 60000 >> 8 ); //定时60ms TIM1_ARRL = ( unsigned char )( 60000 ); TIM1_PSCRH = 0x00; // 16M / (1+15) =1M TIM1_PSCRL = 0x0f; TIM1_CCER1 &= ~( 0x11 ); //输入捕获1、2禁止 TIM1_CCMR1 |= 0x01; //IC1映射在TI1FP1上； TIM1_CCER1 &= ~( 0x02 ); //ch1 捕获上升沿或者高电平 TIM1_CCMR2 |= 0x02; //IC2映射在TI1FP2上 TIM1_CCER1 |= 0x20; //捕获2 低电平或者下降沿 TIM1_SMCR |= 0x54; //滤波后定时器输入1 复位模式 TIM1_SR1 &= 0xF9; //清除CC1F CC2F标志 TIM1_SR2 &= 0xFD; //清除CC1OF标志 TIM1_IER |= 0x06; //允许捕获1、2中断 TIM1_CCER1 |= 0x11; //使能输入捕获1、2 TIM1_CR1 |= 0x01; } //TIM1 捕获比较中断 中断号12 #pragma vector = 14 // IAR中的中断号，要在STVD中的中断号上加2 __interrupt void signal_capture_irq( void ) { unsigned char ccr1l = 0, ccr1h = 0; if( ( ( TIM1_SR1 & 0x02 ) != 0 ) && ( ( TIM1_IER & 0x02 ) != 0 ) ) { ccr1h = TIM1_CCR1H; ccr1l = TIM1_CCR1L; total = ( ccr1h << 8 ) + ccr1l; //周期 IsOk_Flag = 1; TIM1_SR1 = ~( 0x02 ); //清除捕获1标志 } else if( ( ( TIM1_SR1 & 0x04 ) != 0 ) && ( ( TIM1_IER & 0x04 ) != 0 ) ) { ccr1h = TIM1_CCR2H; ccr1l = TIM1_CCR2L; high = ( ccr1h << 8 ) + ccr1l; //频率 TIM1_SR1 = ~( 0x04 ); //清除捕获2标志 } }