int main(){
int i;
int page_count=5;
char wr_buffer[(page_count*PAGE_SIZE)];
char rd_buffer[page_count*PAGE_SIZE];
int res=0;
/* OPEN the file */
if ((FILE_DESC = open("/dev/i2c-flash",O_RDWR)) < 0) {
fprintf(stderr,"APP: Error: Failed to open the bus: %s\n",strerror(errno));
exit(1);
}
printf("APP: File opened successfully\n");
/* Populate the buffer to write */
for(i=0; i<(page_count*PAGE_SIZE); i++){
wr_buffer[i]='*';
}
/* SEEK to page number */
if(seek_EEPROM(510) ==-1) //
return -1;
/* write until it returns with 0 */
while((res=write(FILE_DESC, wr_buffer, page_count)) !=0){
writeOutput(res);
usleep(300000);
}
writeOutput(res);
/* SEEK to page number */
if(seek_EEPROM(510) ==-1) //
return -1;
while( (res=read(FILE_DESC,rd_buffer, page_count)) != 0)
{
readOutput(res, rd_buffer, page_count);
usleep(300000);
}
readOutput(res, rd_buffer, page_count);
return 0;
}
/* FUNCTION: int read_EEPROM(void *buf, int count)
* DESCRIPTION: Reads a sequence of count pages from the EEPROM
* device into user memory pointed by buf. The
* pages to be read start from the current page
* poisition of the EEPROM. The page position is
* then advanced by count and, if reaching the end
* of pages, wrapped around to the beginning of
* the EEPROM.
* RETURN: 0 is succeed
* -1 if failure
*/
int read_EEPROM(void *buf, int count) {
//allocate some memory for the read
//PAGE_BYTES -1 since char is of size 1
//and we don't care about the page
//offset. That is within the device
char *tBuf = malloc(PAGE_BYTES);
int buffPtr = 0;
int address;
int i = 0; //control for the for loop
int res;
//loop through the number of pages that need to
//be read
for (i; i < count; i++) {
seek_EEPROM(currPage / PAGE_BYTES);
//read from the
//TODO This doesn't return correctly when there are
//spaces. Due to printf
res = read(fd, buf + (i * PAGE_BYTES), PAGE_BYTES);
if (res < 0) {
printf("\nReading from the page failed!\n");
return -1;
}
inc_offset((currPage / PAGE_BYTES) + 1);
/*
if (read(fd, tbuf, PAGE_BYTES) != PAGE_BYTES) {
printf("\nI2C Read Failed!\n");
return -1;
}
*/
}
return 0; //SUCCESS!!
}
int main(int argc, char **argv) {
char filename[20]; // device to open
int uInput; // user input
int pageRWS; // num of pages to read, write
char inp[64]; // input from user
char *buf;
// or set
//create the file name according to adapter num
snprintf(filename, 19, "/dev/i2c-%d", ADAPT_NUMB);
//first we open the device and verify that it was
//opened correctly
fd = open(filename, O_RDWR);
if (fd < 0) {
printf("\n%s could not be opened, or was not found\n", filename);
exit(1);
}
//set slave address, check for errors
if (ioctl(fd, I2C_SLAVE, SLAVE_ADDR) < 0) {
printf("\n%d address not found.\n");
exit(1);
}
//do some reading or writing
do {
printf("\n1.Read\n2.Write\n3.Set\n4.Quit\n");
scanf("%d", &uInput);
switch(uInput) {
case 1 :
printf("\nRead Statement\n");
printf("\nHow many pages to read?\n");
scanf("%d", &pageRWS);
buf = malloc(sizeof(char) * PAGE_BYTES * pageRWS);
memset(buf, 0, sizeof(char) * 64 * pageRWS);
read_EEPROM(buf, pageRWS);
printBuf(buf, PAGE_BYTES * pageRWS, PAGE_BYTES);
free(buf);
break;
case 2 :
printf("\nWrite Statement\n");
printf("\nHow many pages to write?\n");
scanf("%d", &pageRWS);
buf = malloc((sizeof(char) * PAGE_BYTES * pageRWS));
memset(buf, 0, sizeof(char) * 64 * pageRWS);
printf("\nData to write:\n");
scanf("%s", buf);
write_EEPROM(buf, pageRWS);
free(buf);
break;
case 3 :
printf("\nSet Statement\n");
printf("\nNew device offset?\n");
scanf("%d", &pageRWS);
seek_EEPROM(pageRWS);
break;
case 4 :
printf("\nQuit\n");
break;
default:
printf("\nUnknown Command\n");
break;
}
} while (uInput != 4);
close(fd);
return 0;
}
