Won't program after programming GPIO_INT8

[jdarling]

I got hello world to work, the decided to program GPIO_INT8 to my board. After loading it I could see the IO pins toggle while pulling them high or low. Yea!

But now I can't program the board any more. It still runs the GPIO_INT8 code no matter what I try. Is there some sort of program mode I can force it to by pulling a pin low or high?

[basicchip]

In BASIC if you exit BASICtools and restart, it should halt the program. We haven't seen one that was not halted. If you are using BASIC could you post a sample. We have seen programs that blast out the serial port that hang serial driver and that looks like what you describe.

In C it always enters ISP mode to write a new program, I've never seen a program or can think of one that would brick a part.

And which board are you using?

[jdarling]

The board is the 812 based 20 pin DIM version.

I had the board unplugged from anything all night and plugged it into a completely different computer. Started up the Coridium BASICtools again and still nothing. But again when I take pins to ground I see;

GPIO 0 Boot Pin Interrupt #
GPIO 1 Boot Pin Interrupt #

Always in sequence and with # counting up.

All I did was load the GPIO_INT8.bas file to it through a serial cable, nothing special.

I don't think the part is bricked, I think its auto-starting the GPIO_INT8 code as its doing exactly what one would expect this code to do when powered up. Even if I just plug the board into a 5 volt supply, then hookup the RXD, TXD, and GND pins to a serial cable I can see the shifts when taking pins to ground.

[basicchip]

You also need to connect up RESET to DTR or RTS depending on what kind of cable you have (RTS on FTDI built cables). That resets the board, and within 1/2 second of the reset an ESC or ctl-C has to be received or the BASIC program will start up.

This is also covered in the Power on behavior in the Hardware section.