/* * dcm_main.c * * S3C2410-S DCM MOTOR * * Author: wang bin <wbinbuaa@163.com>	 * Date  : $Date: 2005/07/27 $  * * $Revision: 1.0.0.1 $ *						 * This file is subject to the terms and conditions of the GNU General Public * License.  See the file COPYING in the main directory of this archive * for more details. */#include <stdio.h>#include <fcntl.h>#include <string.h>#include <sys/ioctl.h>#define DCM_IOCTRL_SETPWM 			(0x10)#define DCM_TCNTB0				(16384)static int dcm_fd = -1;char *DCM_DEV="/dev/dcm/0raw";void Delay(int t){	int i;	for(;t>0;t--)		for(i=0;i<400;i++);}/****************************************************************/int main(int argc, char **argv){	int i = 0;	int status = 1;	int setpwm = 0;	int factor = DCM_TCNTB0/1024;	if((dcm_fd=open(DCM_DEV, O_WRONLY))<0){		printf("Error opening %s device\n", DCM_DEV);		return 1;	}			for (;;) {		for (i=-512; i<=512; i++) {			if(status == 1)				setpwm = i;			else				setpwm = -i;			ioctl(dcm_fd, DCM_IOCTRL_SETPWM, (setpwm * factor));						Delay(500);			printf("setpwm = %d \n", setpwm);		}		status = -status;	}		close(dcm_fd);		return 0;}