pwm输出实验
单片机源程序如下:
- #include "led.h"
- #include "delay.h"
- #include "sys.h"
- #include "pwm.h"
- int main(void)
- {
- u16 led0pwmval=0;
- u8 dir=1;
- delay_init(); //延时函数初始化
- LED_Init(); //初始化与LED连接的硬件接口
- TIM1_PWM_Init(899,0);//不分频。PWM频率=72000/(899+1)=80Khz
- while(1)
- {
- delay_ms(10);
- if(dir)led0pwmval++;
- else led0pwmval--;
- if(led0pwmval>300)dir=0;
- if(led0pwmval==0)dir=1;
- TIM_SetCompare1(TIM1,led0pwmval);
- }
- }
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pwm.zip
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