/******************************* file : testpwm.c ******************************                        Version :  1.0                        Function:  The PWM driver test                         Auther:    BIT                        11/2006*******************************************************************************/#include <stdio.h>#include <unistd.h>#include <fcntl.h>#include <stdlib.h>#include <math.h>#include "disp_pic.h"/******************************************************************************output a pwm wave*******************************************************************************/main(){	int fd;	unsigned int pwm_data;	unsigned char str_temp[32];	unsigned char temp;	printf("\n******************\n");		printf(" PWM Test Program.\n");	printf("******************\n");	fd=open("/dev/pwm",O_RDWR);	if(fd<0)	{		printf("Can't open device file: pwm\n");		perror("Open: ");		exit(-1);	}	while(1)	{		printf("\n\n****************************************************\n");		printf("Input the decimal of the PWM (0-4095) :\n");		printf("--For example, if you input '654', then the H:L of the pwm output is (654 : 4095-654)\n");	                fgets(str_temp,32,stdin);                pwm_data=atoi(str_temp);						pwm_data&=0xfff;			printf("What you input is : 0x%x\n",pwm_data);		ioctl(fd,0,pwm_data);			}}