bootloader does not work..

[ScaleRobotics]

Hi supratic,

You mention modifying the code. What were your modifications? The PIC16F877A should work straight out of the box, no modifications required, with the hex called tinybld_16F876A_20MHz.HEX for 20 mhz. One thing you don't mention is a MAX232 device connected to your pic chip. You will need it on the PIC16 devices to invert your signal and modify their levels for your computer to "hear" correctly.

If you were using a PIC18, you could modify the code so you did not need a max232 device. http://www.picbasic.co.uk/forum/show...2538#post82538

Walter

[supratik]

Hi Scalerobotics,
Thanx for replying. I fixed that problem. Now I have a new problem. Its not at all detecting the PIC. I think there is no problem with the programmer because I can program an old PIC16F877A. But as soon as I replacing with a new PIC16F877A its not detecting with "CheckPIC" (a button on tiny bootloader). Its not even working with the file tinybld_16F876A_20MHz.HEX. Its saying...

Searching for PIC ...Not found,
ERROR!

Is there anything special I have to do for a new PIC16F877A which was never programmed. Thanx in advance.