fram_test.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 RW_SIZE 32
#define DEV_NAME "/sys/bus/spi/devices/spi0.0/fram"
unsigned char *cWriteBuffer = NULL;
unsigned char *cReadBuffer = NULL;
int RWDateCompare(void)
{
int i;
for(i=0; i<RW_SIZE; i++)
{
if( cWriteBuffer[i] != cReadBuffer[i] )
return -1;
}
return 0;
}
int Fram_Write(int fd)
{
int ret;
lseek(fd, 0, SEEK_SET);
ret = write(fd, cWriteBuffer, RW_SIZE);
if(ret != RW_SIZE)
{
fputs("Error Write()\n",stderr);
free(cWriteBuffer);
free(cReadBuffer);
exit(-EIO);
}
return 0;
}
int Fram_Read(int fd)
{
int ret;
lseek(fd, 0, SEEK_SET);
ret = read(fd, cReadBuffer, RW_SIZE);
if(ret != RW_SIZE)
{
fputs("Error Read()\n",stderr);
free(cWriteBuffer);
free(cReadBuffer);
exit(-EIO);
}
return 0;
}
int main(int argc, char **argv)
{
int ret, i;
unsigned int fd;
printf("### Fram Read/Write Test App Start!! ###\n");
cWriteBuffer = (unsigned char *)malloc( sizeof(unsigned char)*RW_SIZE);
if( cWriteBuffer == NULL)
return -ENOMEM;
cReadBuffer = (unsigned char *)malloc( sizeof(unsigned char)*RW_SIZE);
if( cReadBuffer == NULL)
return -ENOMEM;
memset(cWriteBuffer, 0, RW_SIZE);
memset(cReadBuffer, 0, RW_SIZE);
fd = open (DEV_NAME, O_RDWR);
if(fd < 0) {
fputs("Error open()\n",stderr);
free(cWriteBuffer);
free(cReadBuffer);
return -ENODEV;
}
// Init 0 (32Byte)
Fram_Write(fd);
// Set Value
for(i=0; i<RW_SIZE; i++)
cWriteBuffer[i] = i;
Fram_Write(fd);
Fram_Read(fd);
ret = RWDateCompare();
printf("### Fram Read/Write Test App End!! ###\n");
return ret;
}