8-bit Bootloader from Microchip

[flotulopex]

Thank you Richard and Ioannis, I appreciate your advice.

I've never tried ISCP either so let's discover this one

[Ioannis]

After using it with the Microchip IPE (which is not very good design IMHO), I found this one http://www.pickitplus.co.uk/Typesetter/ for my Pickit2 and Pickit3.

It is a stand alone application that is maintained and updated on a regular basis by Evan Venn, a very helpful person.

Using ICSP is very easy. You connect through 5 pins the MCU (MCLR, +Vdd, GND, CLK and DATA) either permanent while developing or momentarily only for programming and hit WRITE and you are ready.

Only take care not to load too much the CLK and DATA lines (PortB.6 and PortB.7) which leads to programming failure.

And best of all, you can even supply with 3.3 or 5 volts the MCU through the Pickit. I had successfully supplied a circuit with 4x20 backlit LCD.

Ioannis