write.c
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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <fcntl.h>
#include <ftw.h>
#include <string.h>
#define READ_BUF_LEN 2048
#define WRITE_BUF_LEN 2048
#define DEV_NAME "/sys/bus/spi/devices/spi0.0/fram"
int main(int argc, char ** argv)
{
char *device = NULL;
unsigned char *write_buffer;
int i,j;
unsigned int fd;
unsigned int size;
device = argv[1];
if(argc < 2)
device = DEV_NAME;
fd = open (device, O_RDWR);
if(fd < 0)
{
fputs("Error \n",stderr);
exit(1);
}
write_buffer = (unsigned char *)malloc( sizeof(unsigned char)*WRITE_BUF_LEN );
memset(write_buffer, 0x0, WRITE_BUF_LEN);
j=0;
for(i=0;i<2048;i++)
{
write_buffer[i] = 0xff;
if((i%0x10) == 0)
write_buffer[i] = j++;
}
size = write(fd, write_buffer, WRITE_BUF_LEN);
printf("size(%d)\n",size);
free(write_buffer);
close(fd);
return 0;
}