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39 lines
2.0 KiB
Plaintext
39 lines
2.0 KiB
Plaintext
# ESP32-S3 USB CDC-ACM companion support
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#
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# ESP32-S3 has a DWC2 USB OTG peripheral (snps,dwc2 compatible) that supports
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# the Zephyr USB NEXT stack. This conf enables it and turns on the companion
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# USB transport on S3 boards. Do NOT use on ESP32 (original) or C3/C6 — those
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# chips have no DWC2 controller.
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#
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# Applied AUTOMATICALLY to companion builds on every S3 board whose board.overlay
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# includes esp32s3_usb_otg.dtsi — see the "Auto-include the ESP32-S3 USB CDC-ACM
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# companion transport" block in CMakeLists.txt for the gate (companion role only,
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# and not on debug builds, which need that port for the console). Pass it by
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# hand only to override that policy:
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# -DEXTRA_CONF_FILE="boards/common/esp32s3_usb.conf"
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#
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# NOTE: this takes the USB port away from USB-Serial-JTAG, so esptool's
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# auto-reset into download mode stops working on boards flashed over native USB.
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# `start dfu` and the 1200-baud touch set FORCE_DOWNLOAD_BOOT to give it back
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# (ZephyrBoard::rebootToBootloader); otherwise it is the BOOT button.
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#
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# Also add the cdc_acm_uart DTS node to the board overlay (the overlays include
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# boards/common/esp32s3_usb_otg.dtsi). Without the DT node,
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# DT_HAS_COMPAT_STATUS_OKAY(zephyr_cdc_acm_uart) is false and
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# zephcore_usbd_init() is compiled out at the #if check.
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#
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# The same-named esp32s3_usb.overlay is auto-paired with this conf and reroutes
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# the console off USB Serial/JTAG onto uart0 — see that file. Keep the pairing
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# intact: the reroute must never be applied by a build that does not set the
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# Kconfig below, or non-companion roles lose their console and serial CLI.
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CONFIG_USB_DEVICE_STACK_NEXT=y
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CONFIG_ZEPHCORE_COMPANION_USB=y
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CONFIG_CDC_ACM_SERIAL_INITIALIZE_AT_BOOT=n
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CONFIG_UART_LINE_CTRL=y
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# Disable USB Serial/JTAG so it doesn't fight USB OTG for the D+/D- pins.
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# ESP32-S3 has an internal mux — only one controller can own the port at a time.
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# With USB companion active, the port IS the companion protocol channel.
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CONFIG_ESP_USB_SERIAL_JTAG_ENABLED=n
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