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19:47.46 | ecc | I'm trying to use openocd to debug a kirkwood (feroceon) board. I've seen conflicting suggestions about whether or not to connect the SRST line. Any pointers on how to set this up the right way? |
19:49.41 | ecc | (I should say that I'm not very knowledgable about hardware -- I've been "forced" into it to try to debug some low-level u-boot and linux issues.) |
19:52.32 | Rogan | I would expect that you would need to connect SRST |
19:52.44 | Rogan | in order to allow the JTAG adapter to reset your board |
19:52.59 | Rogan | do you also have nTRST? |
19:56.13 | ecc | Yes, both nTRST and nSRST. It mostly works with just nTRST connected (even though the openocd "reset_config" is "trst_and_srst", which I don't understand either.) |
19:58.37 | Rogan | well, if you have only nTRST connected, you should set "reset nrst_only", I think |
20:01.34 | ecc | Well the "mostly works" part is that has trouble halting the processor reliably. Sometimes it works, sometimes it halts in Thumb mode, sometimes it times out ... I was hoping that if I connected nSRST also, and configured openocd correctly, that would go away. But how to configure openocd "from scratch" in a systematic, rather than trial-and-error, way? |
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20:10.49 | Rogan | ecc: well, if you connect SRST as well as nTRST, then you should configure "reset_config trst_and_srst" |
20:11.07 | Rogan | at least, that is my understanding of it |
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