Tool/software: Code Composer Studio
I designed my own PCB with a PGA900 and have 50 pcs. I have it professionally manufactured. I also have the PGA900EVM and the XDS200 debugger.
I use the latest version of CCS 9.0.1.
I can easily debug a PGA900 with the XDS200 with the PGA900EVM.
But with exactly the same project it doesn't work (anymore) with my own print . A few months ago it worked with CCS V8.0.2, but only after I shortened the debug cable and lowered the frequency to 50KHz.
Now I have the new CCS version and I just can't get it to work anymore. And I can't get back to the old setup, because it was on an older pc.
When I test the debug connection I get the error:
[Start: Texas Instruments XDS2xx USB Debug Probe_0]
Execute the command:
%ccs_base%/common/uscif/dbgjtag -f %boarddatafile% -rv -o -S integrity
[Result]
-----[Print the board config pathname(s)]------------------------------------
C:\Users\CH1011~1\AppData\Local\TEXASI~1\
CCS\ccs901\0\0\BrdDat\testBoard.dat
-----[Print the reset-command software log-file]-----------------------------
This utility has selected a 560/2xx-class product.
This utility will load the program 'xds2xxu.out'.
The library build date was 'Apr 30 2019'.
The library build time was '12:14:56'.
The library package version is '8.1.0.00012'.
The library component version is '35.35.0.0'.
The controller does not use a programmable FPGA.
An error occurred while hard opening the controller.
-----[An error has occurred and this utility has aborted]--------------------
This error is generated by TI's USCIF driver or utilities.
The value is '-615' (0xfffffd99).
The title is 'SC_ERR_SWD_PROTOCOL'.
The explanation is:
The target failed to see a correctly formatted SWD header. The
connection to the target may be unreliable. Try lowering the
TCLK setting before trying again.
[End: Texas Instruments XDS2xx USB Debug Probe_0]
I have so far taken the following measures to determine the error:
- Aligning the pin levels with the jumpers on the EVM -> EVM still works and own board doesn't
- Desolder PGA900 IC from own PCB and flash in EVM socket -> works
- Check the connection lines GND, SWDCLK, SWDIO, AVDD -> The connection is implemented exactly as in the reference scheme of the EVM and everything is connected correctly.
- Several prints tested and ESD taken into account -> Same error behavior everywhere
- Various (linear) power supplies and supply voltages (5V-10V) used
- Various USB slots used for XD200
- Pull-down 10k attached to SWDIO.
However, the same error message was displayed again and again. It struck me that there are very contradictory data regarding Pull-Up, Pull-Down at SWD, which is generally very badly documented. For example, there is no schema for the XDS200 debuggers connectors (CTI20-Pin to ARM-10Pin).
I am open for further suggestions to find and eliminate the bug and am also willing to release my print design and software project if necessary.
