pwmtest.c

MagicArm开发环境下的PWM实验源代码

#define IN_TGPIO
#include "config.h"

int main()
{
    int fd;
    uint32 sum;
    
    fd = open("/dev/PWM", O_RDONLY);
    if(fd == -1)
    {
        printf("\nCan't open PWM!\n");
        return -1;
    }

    printf("Test PWM2(P0.7) output.\n");

    ioctl(fd, PWM_SET_CYC, Fpclk / 1000);
    ioctl(fd, PWM_2_SET_DUTY, Fpclk / 2000);
    ioctl(fd, PWM_2_ENABLE);

    while(1);

    sum = 0;
    ioctl(fd, PWM_GET_RUN_TIME, &sum);
    printf("sum is %u\n", sum);

    sleep(10);
    ioctl(fd, PWM_GET_RUN_TIME, &sum);
    printf("sum is %u\n", sum);
    printf("exit\n");
    close(fd);
    
    return 0;
}