I have a Cortex-A9-based SOC (a Broadcom device) that produces the following error when hooked to a J-Trace Pro debugger:
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I've verified that things are connected correctly and that the SOC is indeed pulling up JTDO (not a stray pull-up or similar). Is this similar to this issue where the debugger is missing the right recipe for the device?
Source Code
- Device "CORTEX-A9" selected.
- Connecting to target via JTAG
- TotalIRLen = 4, IRPrint = 0x01
- JTAG chain detection found 1 devices:
- #0 Id: 0x4BA00477, IRLen: 04, CoreSight JTAG-DP
- Scanning AP map to find all available APs
- AP[0]: Stopped AP scan as end of AP map has been reached
- Iterating through AP map to find APB-AP to use
- Could not measure total IR len. TDO is constant high.
- Could not measure total IR len. TDO is constant high.
- ****** Error: Could not find matching AP in Coresight setup
- Could not measure total IR len. TDO is constant high.
- Could not measure total IR len. TDO is constant high.
- Cannot connect to target.