Error with PIC10f and High Tech C

[M3GAPL3X]

wdtcon htc

Hi Guys,

I am getting the following errors for some reason. Basically I am using a counter to keep track of how long a button is pressed. The WDT wakes up every 18 ms.

#include <htc.h>
#define BUTTON_INPUT GP0

//Sleep command 
void Sleep(void)
{
#asm
	sleep
#endasm
}

//main function
void main()
{
	while(1) //do forever
	{
		CLRWDT(); //clear the watchdog timer
		CheckButton(); //check button
		WDTCON = 1; //enable the watchdog timer	
		Sleep(); //go to sleep for 18 ms		
		WDTCON = 0; //disable the watchdog timer
		CheckButton(); //check button again
	}
}

//Function: CheckButton
//Description: Check the state of RC2 
//if active low, increment COUNTER. Check COUNTER to see if it is over 3 seconds. If so, provide power
//to main computer. If active high, reset COUNTER to 0 

void CheckButton(void)
{
	unsigned int COUNTER = 0;

	if (BUTTON_INPUT == 0) //if an active low, increment the COUNTER
		{
			COUNTER++;
			if (COUNTER >= 10000) //3
				{
					//SEND POWER TO HOST, IN TESTING, LIGHT AN LED
				}
		}
		else //else - reset the COUNTER value back to 0 because button is not pressed
			{
				COUNTER = 0;
			}
}

I get the following error:
19.1 undefined identifier "WDTCON"

 

[millwood]

wdtcon = 1 htc

that means WDTCON is undefined. you need to read the datasheet and the headerfile to see what is appropriate for the chip you are programming for.

 

[betwixt]

pic10f c program hi-tech

As far as I can remember, the watchdog timer cannot be enabled or disabled in software. The watchdog is controlled by a bit in the configuration fuses which have to be set when the device is programmed.

Brian.

 

[M3GAPL3X]

hi-tech c sleep command

Thanks guys. I believe Brian is right. The PIC10f series has no software control of the WDT!!