Debugging TMS320, Step 1

You are right about the USB JTAG for the job. It should interface directly with CCS. I would recommend the 560 series from TI, but it is also made by others and may be cheaper.

You can set a breakpoint at any time, so setting it before the code is loaded is not a problem. When the address you have set the breakpoint on is reached the code will stop. The bigger problem may be knowing what those addresses are. The code is presumably linked for where it is loaded, so you may be able to do debugging with full source information.

As to telling CCS that the device is hooked up, once you have told CCS that you are using the JTAG emulator it will not start until it can talk to the JTAG. If I remember right, the CCS setup utility will be invoked automatically if it can not communicate with the device.

Scott

On Mon, 17 Aug 2009 09:56:44 -0600, "Not Really Me" wrote in comp.arch.embedded:

Scott,

Your advice is pretty good, but there is one point where the OP might save a little money.

The 28xxx leaves out some of the fancy debug features of some of the other TI DSP families, so there is no real gain in paying more for a

560 series JTAG debugger over a 510 class device.

--
Jack Klein http://JK-Technology.Com
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I agree with Jack, the 560 series is an overkill for C28xx devices.

Regarding the breakpoints, I would like to remind you that there are two kinds: Hardware breakpoints which are basically program counter comparators and you can set only two of them and Software breakpoints which are basically assembly "ESTOP0" instruction. You can set any number of them, but only in RAM, and they can be overwritten by the CPU. Therefore SW breakpoints must be set after the code was loaded. You were warned.

Once you are connected to the CPU you should load symbols from the compiler generated .out file so that CCS can link the source files (.c, .asm) with program counter in order to have the ability to step through the code, not only through disassembly

Good Luck

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it may be what you want, low cost (EUR 55) programming and debugging tool for TMS320 family a bit slower than the other expensive USB JTAGs but does same step, breakpoints etc

Best regards Tsvetan Usunov Olimex ltd

--------- Development and prototype boards, programmers, debuggers for ARM, AVR, MSP430, MAXQ2000 and PIC at

Fast PCB prototypes in 3-5 working days for EUR 30 at /pcb

Good to know, thanks. I haven't used the 28xxx family, but many of the others.

Scott

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it may be what you want, low cost (EUR 55) programming and debugging tool for TMS320 family a bit slower than the other expensive USB JTAGs but does same step, breakpoints etc

Will this device also work for the DaVinci DSP's (TMS320DM642)?

Antoon

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You have all been most helpful. Now as soon as my hardware guy sends me the development unit with the JTAG adapter in place, I have something to go on! Thanks again.

What's wrong with the Alternator signal that provides the "Ignition light" switching?

Paul E. Bennett