test.c

来自「基于ARM9200的CF卡驱动程序」· C语言 代码 · 共 47 行

#include <stdio.h>
#include <fcntl.h>
int main()
{
	struct timeval start_time,end_time;
	int fd,Read_Count,i,j;
	char buff[512];
	for(i=0;i<20480;i++)
		for(j=0;j<300;j++)
			Read_Count++;
	fd=open("/dev/cf", O_RDWR );         //| O_NOCTTY | O_NDELAY	
	if (fd==-1)	
	{
		printf("cf device file open failed\n");
		return -1;	
	}
	
	for(i=0;i<512;i++)
		buff[i] = i;	
	
	gettimeofday(&start_time,NULL);
	for(i=0;i<20480/32;i++)
	{
		if(write(fd, buff, 512)<=0)
			printf("cf device file write failed\n");
	}
	gettimeofday(&end_time,NULL);
	
	printf("use time:%dS%dmS\n",(end_time.tv_sec - start_time.tv_sec),(end_time.tv_usec - start_time.tv_usec)/1000);
	return 0;
	if((Read_Count = read(fd, buff, 512)) > 0)
	{
		for(i=0;i<512/32;i++)
		{
			for(j=0;j<16;j++)
			{
				printf("%02x ",buff[i*16+j]);
			}
			printf("\n");
		}
	}
	else
	{
		printf("read err\n");
	}
	
}