User manual

Frequently Asked Questions (FAQs)

• When using a 16-bit device, an unexpected reset occurred. How do I

determine what caused it?

Some things to consider:

- To determine a reset source, check the RCON register.

- Handle traps/interrupts in an Interrupt Service Routine (ISR). You should include

trap.c style code, i.e.,

void __attribute__((__interrupt__)) _OscillatorFail(void);

void __attribute__((__interrupt__))

_AltOscillatorFail(void);

void __attribute__((__interrupt__)) _OscillatorFail(void)

{

INTCON1bits.OSCFAIL = 0; //Clear the trap flag

while (1);

}

void __attribute__((__interrupt__))

_AltOscillatorFail(void)

{

INTCON1bits.OSCFAIL = 0;

while (1);

}

- Use ASSERTs.

• I have finished debugging my code. Now I’ve programmed my part, but it

won’t run. What’s wrong?

Some things to consider are:

- Have you selected the debugger as a programmer and then tried to program a

header board? A header board contains an -ICE/-ICD version of the device and

may not function like the actual device. Only program regular devices with the

debugger as a programmer. Regular devices include devices that have on-board

ICE/ICD circuitry, but are not the special -ICE/-ICD devices found on header

boards.

- Have you selected the debugger as a debugger and then tried to program a pro-

duction device? Programming a device when the debugger is a debugger will pro-

gram a debug executive into program memory and set up other device features

for debug (see Section 2.7.1 “Sequence of Operations Leading to Debug-

ging”). To program final (release) code, select the debugger as a programmer.

- Have you selected “Release” from the Build Configuration drop-down list or Proj-

ect menu? You must do this for final (release) code. Rebuild your project, repro-

gram the device, and try to run your code again.

• I didn’t set a software breakpoint, yet I have one in my code. What’s going

on?

What you are seeing is a phantom breakpoint. Occasionally, a breakpoint can

become enabled when it shouldn’t be. Simply disable or delete the breakpoint.