Using USB TAP

[MikeDawson]

I need a little help here...

I purchased USP TAP and downloaded driver for DSP56F803 chip.

The USB TAP shows up in the Remote Debugging Connections list.

I compiled and download the program, and it all seemed to work.

However, it did not program the flash and although the debug controls work, there is no valid code to execute.

Ive read the USB TAP Users Guide till I'm blue in the face. I;ve gone over the Debugger section in the DSP65F800 Users Manual.

The question is "What is not set right?" or "What am I doing wrong?"

This shouldbe plug and play - the technology is here folks.

I still cannot figure out how to set the debug port clock frequency. There is no real reference to it anywhere. The closest thing is JTAG Clock Speed.

- Mike Dawson -

[CW_Scott]

Hi Mike,

It sounds to me like the flash config file might not be set or might be set incorrectly. This is most often the cause of these kinds of problems. It's under the Debugger Settings on the M56800E Target Settings panel. It should be pointed toward one of the included config files for your chip.
The JTAG speed used for the tap is generally 8000. One some systems it may help to step this speed down (I usually half it each time until I get a connection, then step it up in smaller increments) but the necessity to change it is very rare.

Scott Mauer
Codewarrior Embedded Support
Freescale Semiconductor