求大神指导,AT91SAM9G45的PWM驱动,整了一天了,还没有找到问题的关键

头文件:

#include <stdio.h>  #include <sys/types.h>  #include <sys/stat.h>  #include <fcntl.h>  #include <unistd.h>  #include <string.h>  #include <termios.h>  #include <errno.h>  #include <fcntl.h>  #include <sys/ioctl.h>  #include "at91_pwm.h"    #define DEV_PWM0 "/dev/mypwm"  int main(int argc, void *argv[])  {      int fd0 = -1;         int i;      at91_pwm_arg arg;    #if 1 //PWM0 Test      printf (" AT91 PWM0 Test ...\n");             fd0 = open(DEV_PWM0, O_RDWR);          if (fd0 == 0) {                  printf("open pwm device error! %d\n", fd0);                  return -1;          }             arg.pwm_freq = 1000;          arg.pwm_duty = 50;          arg.pwm_pulse = 1;          ioctl(fd0, 2, &arg);printf("---->2<----ioctl pwm device error! %d\n");             ioctl(fd0, 0, 1); printf("---->0<----ioctl pwm device error! %d\n");           for (i=0; i<3; i++) {                  sleep(1);          }          ioctl(fd0, 1, 0); printf("---->1<----ioctl pwm device error! %d\n");        close(fd0); #endif //PWM0  }

1楼heqiuya3天前 14:22

没有人回帖,好冷啊.~求大神指导.