Uno R4 WiFi SWD debugging
Per https://docs.arduino.cc/static/bfa7a2ec0621accfa32dc2b4bcfd4f4e/ABX00087-schematics.pdf and https://docs.arduino.cc/static/1ff718e3a20320cd19a240ffbe6a0645/ABX00087-full-pinout.pdf the Renesas R7FA4M1AB3CFM chip's SWD pins, P108_SWDIO and P300_SWCLK, are connected to the ESP32-S3's IO7 and IO9 pins and are not further exposed on a header or testpad, or disconnectable from the ESP32.
This makes it very hard to SWD debug this board without cutting traces.
My question is: Whyyyyyyyyyyyyy would you do that?
4 Replies
Unknown User•3y ago
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Not needed anymore, I just found out about it myself: https://github.com/bcmi-labs/uno-r4-wifi-usb-bridge/issues/6
The connection of SWDIO + SWDCLK between ESP32-S3 and the Renesas chip is intentional and the ESP32-S3 acts as CMSIS-DAP debugging probe.
Works nicely when integrated into PlatformIO 😉
Unknown User•3y ago
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