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ARMmbed / DAPLink

https://daplink.io
Apache License 2.0
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Support for probe interface level translation #1069

Open mjakovlevs opened 7 months ago

mjakovlevs commented 7 months ago

Could you tell me if there is currently any support for probe interface voltage level translation, for example a possibility for outputting direction control signals for each bidirectional SWD line on the probe MCU GPIO? I am assuming level translation implementation using dedicated ICs with enable and direction control inputs for each data line. Any suggestions would be very appreciated.

Thank you, Mihails

BobbyCounts commented 7 months ago

Yes, this should be possible. Look at the lpc55xx implementation as an example as the MCU-Link uses bidirectional level translators in the way you describe.

https://github.com/ARMmbed/DAPLink/blob/dbb10a262c2cbcc0db879f0af12219445067ed79/source/hic_hal/nxp/lpc55xx/DAP_config.h#L326C1-L344C2

Implementing these functions can allow you to send the appropriate signals to the level shifter direction pins.