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ZephCore T096
50ca150243
The RX-pulse/pin-hold interlock (s_tx_lit/s_rx_pulse_off/ zephcore_led_radio_hold_pin) was gated by HAS_TX_LED alone, so it never compiled in for any PWM-capable board (HAS_TX_LED_PWM). Left two real gaps: - T096 and Wireless Tracker V2 alias heartbeat and TX activity to the SAME physical PWM LED (ZEPHCORE_LED_PIN_SHARED's intent exactly), but had none of the arbitration that protects every plain-GPIO board with the same wiring -- a transmit and a heartbeat tick could still clip each other on the shared PWM channel. - All PWM boards, RAK3401 included, had no onPacketReceived() blink at all: "set leds.radio rx" (or "all") silently did nothing on the activity LED, since that whole code path only existed under HAS_TX_LED. Fixed by widening every "#if HAS_TX_LED" guard around this machinery to "#if HAS_TX_LED_PWM || HAS_TX_LED", and adding a small tx_led_write(bool) helper (mirroring heartbeat_led_write() in helpers/ui/ui_common.c) so the shared interlock logic doesn't need to know which path is compiled in -- only the final write differs. ZEPHCORE_LED_PIN_SHARED itself gained a PWM branch: true when heartbeat-pwm-led and lora-tx-pwm-led alias the same DT node (T096, WT2), same as it already was for the GPIO led0/lora-tx-led case. RAK3401's two PWM LEDs are on distinct nodes, so it correctly stays unshared -- no arbitration overhead there, but it does now get the RX blink like every other PWM board. The heartbeat side (helpers/ui/ui_common.c) needed no change: it already checks zephcore_led_radio_holds_pin() unconditionally through heartbeat_led_write(), from the LED brightness persistence commit earlier today. Verified building for heltec_t096/nrf52840 (shared PWM LED), heltec_wireless_tracker_v2/esp32s3 (shared PWM LED), and rak3401_1watt (two independent PWM LEDs, confirms ZEPHCORE_LED_PIN_SHARED stays 0 there).