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fix(platforms): drop toxic ARDUINO_USB_CDC_ON_BOOT / USB_MODE flags #11

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Merged
zackees merged 1 commit into from
Jun 20, 2026
Merged

fix(platforms): drop toxic ARDUINO_USB_CDC_ON_BOOT / USB_MODE flags #11

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9 changes: 4 additions & 5 deletions platforms/platformio.esp32c3.ini
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Original file line number Diff line number Diff line change
Expand Up @@ -13,11 +13,10 @@ platform = https://github.com/pioarduino/platform-espressif32/releases/download/
board = esp32-c3-devkitm-1
framework = arduino

; USB CDC Configuration
; Set to 0 to disable USB CDC on boot (halts printing until serial monitor is launched)
; Set to 1 to enable USB CDC on boot (prints immediately without waiting for serial monitor)
build_flags =
-DARDUINO_USB_CDC_ON_BOOT=0
; Do NOT add -DARDUINO_USB_CDC_ON_BOOT=1. With CDC-on-boot enabled, Serial is
; routed to the USB-CDC interface, which only enumerates when a USB host is
; connected — boards powered from a wall adapter then hang in setup() the
; moment user code touches Serial. Leave Serial on the UART (default).

lib_deps =
FastLED
9 changes: 5 additions & 4 deletions platforms/platformio.esp32c6.ini
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Expand Up @@ -30,14 +30,15 @@ monitor_filters =
; Without these the FastLED PARLIO TX ISR sits in flash and takes cache-miss
; stalls during execution, silently corrupting LED protocol timing.
; See FastLED src/platforms/esp/32/drivers/parlio/ for the canonical chipset list.
;
; Do NOT add -DARDUINO_USB_CDC_ON_BOOT=1 here. It wires Serial to the USB-CDC
; interface, which only enumerates when a USB host is connected — sketches
; that touch Serial in setup() then hang when the board is powered from a
; wall adapter instead of a PC.
build_flags =
-DCONFIG_PARLIO_TX_ISR_HANDLER_IN_IRAM=1
-DCONFIG_PARLIO_TX_ISR_CACHE_SAFE=1
; ---- CRITICAL: enable USB CDC serial ----
-D ARDUINO_USB_CDC_ON_BOOT=1
-D ARDUINO_USB_MODE=1

; Optional: fix early prints
board_build.flash_mode = dio
board_upload.flash_size = 4MB

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5 changes: 4 additions & 1 deletion platforms/platformio.esp32p4.ini
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Expand Up @@ -18,10 +18,13 @@ board_build.partitions = huge_app.csv
; Without these the FastLED PARLIO TX ISR sits in flash and takes cache-miss
; stalls during execution, silently corrupting LED protocol timing.
; See FastLED src/platforms/esp/32/drivers/parlio/ for the canonical chipset list.
;
; Do NOT add -DARDUINO_USB_CDC_ON_BOOT=1 or -DARDUINO_USB_MODE=1 here. They
; wire Serial to the USB-CDC interface, which only enumerates when a USB host
; is connected — boards powered from a wall adapter then hang in setup().
build_flags =
-DCONFIG_PARLIO_TX_ISR_HANDLER_IN_IRAM=1
-DCONFIG_PARLIO_TX_ISR_CACHE_SAFE=1
-DARDUINO_USB_MODE=1

lib_deps =
FastLED
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