#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <errno.h>
#include <string.h>
#include <dirent.h>

#include <cyg/fileio/fileio.h>
#include <cyg/infra/diag.h>

void mmc_write(char fileName[], long nBlocks, long blockSize, unsigned char testChar)
{
	char *buf;
	int i;
	int fd;
	ssize_t wrote;

	if ((buf = (char*)malloc(blockSize)) == NULL) {
		diag_printf("[error] memory allocation failed!\n");
		return;
	}

	memset(buf, testChar, blockSize);

	if ((fd = open(fileName, O_WRONLY|O_CREAT)) < 0){
		diag_printf("[error] opening file %s for write failed!\n", fileName);
		return;
	}

	for(i=0;i<nBlocks;i++) {
		diag_printf("off:%d\n",lseek(fd, 0, SEEK_CUR));

		wrote = write( fd, buf, blockSize );
		if (wrote != blockSize) {
			diag_printf("[warning] incomplete write at block %d\n", i);
		}
	}
	
	close(fd);
}

int main()
{
	int err;
	int i;

	diag_printf("MMC test start ...\n");

	if ((err = mount( "/dev/mmcda0/1", "/", "fatfs" )) < 0) {
		diag_printf("[error] mounting MMC card!\n");
		return 0;
	}
	
	mmc_write("test.txt", 5, 1024, 'x');

	umount( "/" );

	return 1;
}