Trying to debug TA application with Raspberry 3B about build HOT 6 CLOSED

Hi @Fizbanoide,

right, you need to use UART (you can buy the chipest USB-TTL adapter for a couple bucks, it should work) to be able to receive SW output (from OPTEE OS core and TAs)

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Hi @Fizbanoide ,

Glad to hear that you got that working. Regarding USB, what I have is a normal USB to UART cable. With that connected to the pins according to section 6.1, you should be able to get the debug prints by just open /dev/ttyUSB0 (or so) on PC connected to the Pi.

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Thanks @igoropaniuk and @jbech-linaro , I wasn't sure about it ! Any chance otherwise I can write in a log file that I can access from the Rpi3 ?

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@Fizbanoide ,

I'm not sure if it's a good advice from my side, but if an setup with UART doesn't currently work for you, you can try to follow this discussion OP-TEE/optee_os#954 and as temporary solution apply/rework patches from RFC pull requests OP-TEE/optee_os#810 OP-TEE/optee_client#51 by @jforissier (unfortunately they weren't merged).

These patches introduce a possibility to forward debug output to linux syslog (I guess that's what you asked for)

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@igoropaniuk I'll check those, thanks !

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Hi guys,

Just received the UART cable, and it's working perfectly with Busybox. Thanks again for your help @igoropaniuk @jbech-linaro !

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