A 1000Hz test signal will be generated by the PIC.Power to the PIC is still on at this stage.During this step, power to the PIC is turned on.Program the PIC with "OscCal.hex" This file needs to be loaded onto the PIC to determine the value of OSCAL.The menu selection will be displayed briefly on the screen.Testing of a PIC final software and parameters.Calculating and programming of the calibration bit of the PIC.The final board now performs the following functions:: Soon, I realised that the same circuit can also be used to upload hex files to a PIC.įinally, with a screen and 2 buttons, I added a test routine to the same circuit, so that I can adjust the parameters, and perform an operational test of the final software on the PIC. This board started as a tool to speed up the calibration bit programming on the PIC 12F675 without the need for additional components or wires. To reprogram the calibration bit, another circuit is needed to determine the correct calibration bit. Sometimes, the PICkit 3 erases the calibration bit on the PIC.To test the circuit, external equipment is needed (Servo tester, 5V BEC, 3 cell LiPo battery, and the load driven by the circuit.To test the programmed PIC, and set certain parameters, the circuit still needs to be on a breadboard.To program a PIC, I have to set up a circuit on breadboard. I only have a PICkit 3 programmer, which does not have a convenient ZIF socket to program a stand-alone PIC.PICs thus need to be programmed out of circuit. This is to allow for a small PC board layout. The boards that I make, does not have in-circuit programming capabilities.One of my circuits that I build quite often (20 - 40 at a time), uses a PIC 12F675.
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