adc_test.c

来自「linux下ad7888使用spi口驱动程序代码」· C语言 代码 · 共 38 行

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>

int main(){
	int fd, size;
	char s[] = "1234";
	char buf[10];
	
	//buf = (char *)malloc(sizeof(s));
	//memset( buf, 0, sizeof(s));
	//while ( 1 ){
		fd = open( "/dev/adc", O_WRONLY );
		if ( fd < 0 ){
			printf( "open file fail\n" );
			return -1;
		}
	//while ( 1 ){
		write( fd, s, sizeof( s ) );
	//}
		close( fd );
		
		fd = open( "/dev/adc", O_RDONLY );
	//while ( 1 ){
		size = read( fd, buf, sizeof(s) );
	//}
		close( fd );
		//free( buf );
	
		//printf( "buf = %s\n", buf );
	
	
	return 0;
}