simple pic10f204 C programing - c

Question

I'm new to microcontrollers and picked out a PIC10f204. I am using MPLAB XIDE with the free XC8 C compiler.
I'm trying to slowly learn right now. All i am trying to do is set GPIO bit 0, which is the GP0 pin out, to out put high.
So far my code looks like this but I am not measuring 5V from the pin GP0 or any of the other GPIO pins, except GP3.
#include <xc.h>
#include <stdio.h>
#include <stdlib.h>
// CONFIG
#pragma config WDTE = OFF // Watchdog Timer (WDT disabled)
#pragma config CP = OFF // Code Protect (Code protection off)
#pragma config MCLRE = OFF // Master Clear Enable (GP3/MCLR pin fuction is digital I/O, MCLR internally tied to VDD)
int main(void) {
OSCCAL= 0x00;
TRISGPIO = 0x00;
GPIO= 0xFF;
return 0; // we should never reach this
}
Any help would be much appreciated.
Thanks!

Answer 1

A couple changes might help:
1) Try adding an infinite loop in your code. The program on a microcontroller should follow a general structure of initialization functions followed by an infinite loop.
2) Looking at the datasheet for the PIC10F204, it says that pin 3 is input only. Try modifying as follows: TRISGPIO = 0x08;
I modified your code below to illustrate this. Hopefully this works for you.
int main(void) {
// PIC Initializations should go here
OSCCAL= 0x00;
CMCON0 = 0x51;
TRISGPIO = 0x08;
GPIO= 0xFF;
while(1) {
// Program main loop (should never end)
}
return 0; // we should never reach this
}