rockchip Uart with MCU(FCE2.1)

[xuanlang]

#18826

Hi Audesse Team,

We are trying to use the uart between Rockchip CM3 MPU and FCE2.1 for debugging purposes.
Can you provide a setup procedure or an example on how to use it?
Is the MPU side GPIO12/TXD5 and GPIO13/RXD5 using the one the default Uart? Can you provide some insight on how to set it up? I did not find detail information on how to do that online.

Thanks,
Xuanlang

[Connor]

#18853

The GPIO12/GPIO13 pins are internal gpio mapping from the Raspberry Pi CM4, not Radxa. The datasheets have been updated to reflect the two sets of pins compatible with MPU UART5 (pins 28/31 for Raspi, pins 62/57 for Radxa CM3). The standard/focus SKU for FCE2.1 has both sets of pins populated, but if you have an alternate SKU, the Radxa-compatible pins may not be populated.

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