test.c

来自「基于arm的嵌入式扫描仪和打印机的驱动程序!」· C语言 代码 · 共 54 行

/*
 *      Buttos Example for Matrix IV
 *
 *      Copyright (C) 2004 capbily - friendly-arm
 *	[e-mail]
 */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include "weida_printer.h"
int main(void)
{
	int weida_fd, ret,length;
	char *data="hello,welcome to embedded world!";
	char  buff[100];
	weida_fd = open("/dev/weida_printer", O_WRONLY);
	if (weida_fd < 0) {
		perror("open device buttons");
		exit(1);
	}

	//printf("data len: %d\n, string is %s\n",strlen(data), data);	
        ret = write(weida_fd, data, strlen(data));
	if (ret != strlen(data))
	{
	perror("print worng\n");
        }
	scanf("%s",&buff);
	length=strlen(buff);
	buff[length]='\0';
	ret = write(weida_fd, buff, strlen(buff));
	if (ret != strlen(buff))
	{
	perror("print worng\n");
        }
	/*ioctl(weida_fd, WEIDA_IOCSFONTSPACE, 1);
	printf("1\n");
	ioctl(weida_fd, WEIDA_IOCSLINESPACE, 1);
	printf("2\n");
	sleep(1);
	ret = write(weida_fd, data, strlen(data));
	printf("3\n");*/
	if (ret != strlen(data)) 
	{
	perror("print worng\n");
        }
	close(weida_fd);
	return 0;
}