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To be able to view periph regs while debugging, you need to copy esp32c3.svd to PLATFORM_ROOT/misc/svd directory
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Platformio's openocd-esp32 compiled without builtin JTAG support. You need to get openocd-esp32 there and unpack it to the project folder root https://github.com/espressif/openocd-esp32/releases
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If you are getting x509_crt_bundle error during compilation, edit ~/.platformio/packages/framework-espidf/components/mbedtls/esp_crt_bundle/cacrt_all.pem and remove the EC-ACC certificate or apply any other fix from espressif/esp-idf#5322
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To run ESP-IDF's menuconfig type this in platformio terminal: pio run -t menuconfig
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If ESP-IDF's menuconfig is not working on linux: sudo apt install libncurses5-dev flex bison
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Disable memory protection in menuconfig: toggle Component config → ESP System Settings → Memory protection → Enable memory protection (also you can compile latest openocd-esp32 that works with memory protection set)
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Enable ocd stubs in menuconfig: toggle Component config → ESP32C3-Specific → OpenOCD debugStubs
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If platformio debugger is not working on linux: sudo apt install libpython2.7
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IMPORTANT: Do not forget to use good quiality USB cable without hub or use external power supply, because it may trigger BROWNOUT(and some others) event on startup and you'll spend a lot of time finding the reason.
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On linux you need to install udev rules from openocd-esp32 folder: sudo cp openocd-esp32/share/openocd/contrib/60-openocd.rules /etc/udev/rules.d/60-openocd.rules
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Pinout for builtin USB JTAG/serial: io18 - D-, io19 - D+, link to board description: https://docs.ai-thinker.com/en/esp32c3
