Silly mistake of the week!

[Nigel Goodwin]

Wrote a nice simple program, for a project at work - a simple interrupt driven pulse counter/divider with the processor in sleep most of the time, looking for five plus years battery life (as it will be potted in resin).

Used a little 8 pin PIC, 16F18313 - does everything I need, and I set it up using the MCC (to avoid the bother of getting the clock at the right speed).

For those who haven't used the MCC, it gives you a number of macros for enabling and disabling interrupts, commented out in the code, and you enable them as required.

Unfortunately, when I built it up and ran it, nothing happened? - so I was initially a bit baffled, then noticed my mistake:

// When using interrupts, you need to set the Global and Peripheral Interrupt Enable bits
// Use the following macros to:

// Enable the Global Interrupts
INTERRUPT_GlobalInterruptEnable();

// Enable the Peripheral Interrupts
//INTERRUPT_PeripheralInterruptEnable();

// Disable the Global Interrupts
INTERRUPT_GlobalInterruptDisable();

// Disable the Peripheral Interrupts
//INTERRUPT_PeripheralInterruptDisable();

Removed the // on the wrong line

 

[schmitt trigger]

Was the device already potted?

 

[Nigel Goodwin]

Was the device already potted?

No, it was still at the initial testing phase

It hadn't even been breadboarded, I went direct to having a PCB made.