From ff26459d56cac71f7c9273317bfcde49c18de95c Mon Sep 17 00:00:00 2001
From: MagnusKos <magnuskos@gmail.com>
Date: Mon, 21 Jul 2025 18:50:10 +0300
Subject: [PATCH] Pro-Micro button SENSE signal Added SENSE signal on the user
 button. It is explicitly enabled now for this platform.

---
 src/platform/nrf52/main-nrf52.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/platform/nrf52/main-nrf52.cpp b/src/platform/nrf52/main-nrf52.cpp
index 8441fa310..ceab1a78c 100644
--- a/src/platform/nrf52/main-nrf52.cpp
+++ b/src/platform/nrf52/main-nrf52.cpp
@@ -380,6 +380,12 @@ void cpuDeepSleep(uint32_t msecToWake)
         nrf_gpio_cfg_sense_set(PIN_BUTTON2, sense1);
 #endif
 
+#ifdef PROMICRO_DIY_TCXO
+        nrf_gpio_cfg_input(BUTTON_PIN, NRF_GPIO_PIN_PULLUP); // Enable internal pull-up on the button pin
+        nrf_gpio_pin_sense_t sense = NRF_GPIO_PIN_SENSE_LOW; // Configure SENSE signal on low edge
+        nrf_gpio_cfg_sense_set(BUTTON_PIN, sense);           // Apply SENSE to wake up the device from the deep sleep
+#endif
+
         auto ok = sd_power_system_off();
         if (ok != NRF_SUCCESS) {
             LOG_ERROR("FIXME: Ignoring soft device (EasyDMA pending?) and forcing system-off!");