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leds: do not reclaim a PWM-shared pin as plain GPIO in main()

Browse Source 
server_main_common.cpp and main_observer.cpp both configured led0 as
a plain GPIO output at boot, unconditionally. On ESP32 that calls
esp_rom_gpio_matrix_out() under the hood, which routes the pin's
output to the GPIO signal and takes it away from whatever peripheral
had it before, including the LEDC channel a heartbeat-pwm-led or
lora-tx-pwm-led alias had already claimed during the PWM driver's own
init. The PWM write then succeeds (no error, no warning) but never
reaches the pin: confirmed on V4.3 hardware, where the same pin lights
up fine over plain GPIO, and over PWM in a different (non-Zephyr)
firmware, but stays dark over Zephyr's PWM once this GPIO configure
has run.

Companion builds never hit this (they don't use server_main_common.cpp)
and nRF52 isn't affected (no shared GPIO matrix), which is why T096
tested fine while V4.3 didn't.

Fix is alias-based, not a board list, so any future board with either
PWM alias is covered without extra wiring.

Also: CLI_HAS_RADIO_LED only checked the plain lora-tx-led alias, so
"set leds.radio" replied "(no radio LED on this board)" on boards
whose radio LED exists only via lora-tx-pwm-led (V4.3). Check both.

Documents the two PWM aliases in the board porting guide, and
leds.brightness plus the corrected LED topology counts in
docs/CLI_commands.md.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
ZephCore T096
2026-10-08 18:27:42 +02:00
co-authored by Claude Sonnet 5
parent e5e927e530
commit 6b9d205b00
6 changed files with 91 additions and 13 deletions
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zephcore/helpers/CommonCLI.cpp
+4 -2
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@@ -68,9 +68,11 @@ static const NodePrefs* cliDefaults() {
/* ---- leds.radio / leds.hb mode names ----------------------------------- */
/*
* Which LEDs this board has, so the CLI can say when a setting it stored
* does nothing here. Mirrors the aliases the drivers use.
* does nothing here. Mirrors the aliases the drivers use: lora-tx-led or
* lora-tx-pwm-led, led0 with an led1 fallback.
*/
#define CLI_HAS_RADIO_LED DT_NODE_EXISTS(DT_ALIAS(lora_tx_led))
#define CLI_HAS_RADIO_LED (DT_NODE_EXISTS(DT_ALIAS(lora_tx_led)) || \
DT_NODE_EXISTS(DT_ALIAS(lora_tx_pwm_led)))
#define CLI_HAS_HB_LED (DT_NODE_HAS_PROP(DT_ALIAS(led0), gpios) || \
DT_NODE_HAS_PROP(DT_ALIAS(led1), gpios))