using PortA0-1 to drive external leds in the MC13213 Beekit

[McGillMike]

I'm currently using the Beekit MC13213 and trying to get my SRB (sensor reference board) to drive an external LED circuit. I'm trying to use portA0 here

Essentially, i start by calling the INITIATE_LED macro:

#define INITIATE_EXTLED  {PTADD |= 0x01; KBIPE &= 0xFE;}

which sets the PTADD direction to out, and then disables that ports' interrupt capability

then, whenever i generate a keyboard interrupt on the other pins (whenever a push button gets hit)

i do TOGGLE_EXTLED (self-explanatory):

#define EXT_LEDON   PTAD |= 0x01;
#define EXT_LEDOFF  PTAD &= 0xFE;

//using the above 2 functions, I either set or reset the port value

//to generate a high voltage value to drive the LED circuit
#define TOGGLE_EXT_LED  {if(PTAD&0xFE) EXT_LEDOFF else EXT_LEDON;}

but it doesn't work.

Does anyone have an idea why this isn't working?

thanks.

[Ware]

Your toggle function needs some work...  it should be either:

#define TOGGLE_EXT_LED  {if(PTAD&0x01) EXT_LEDOFF else EXT_LEDON;}

OR:

#define TOGGLE_EXT_LED  PTAD ^= 0x01;

- Ware