一发射就重启

variants/nrf52840/diy/moonshine_NRF52/platformio.ini

@@ -2,11 +2,11 @@
 [env:moonshine_NRF52_node]
 extends = nrf52840_base
 board = adafruit_feather_nrf52840
-board_build.ldscript = src/platform/nrf52/nrf52840_s140_v7.ld
 build_flags = ${nrf52840_base.build_flags}
   -I variants/nrf52840/diy/moonshine_NRF52
   -D PRIVATE_HW
   -D USE_SEGGER
+  -D CONFIG_GPIO_AS_PINRESET
   -D MESHTASTIC_EXCLUDE_I2C=1
   -D MESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR=1
   -D MESHTASTIC_EXCLUDE_INPUTBROKER=1

variants/nrf52840/diy/moonshine_NRF52/readme.md

@@ -8,9 +8,11 @@ DIY Meshtastic node variant based on the RF-BM-ND05 nRF52840 module.
 - **LF clock**: internal RC (`USE_LFRC`) - RF-BM-ND05 has no 32.768 kHz crystal; using
   `USE_LFXO` without a crystal makes SoftDevice hang in `RTC1_IRQHandler` waiting
   for LFCLK, causing LED-stuck-on and silent BLE failure.
-- **LoRa**: E22-400M33S (SX1268 + 33dBm PA, 2W, 433MHz) - `SX126X_MAX_POWER=8`,
+- **LoRa**: E22-400M33S (SX1268 + 33dBm PA, 2W, 433MHz) - `SX126X_MAX_POWER=2`,
-  `TX_GAIN_LORA=25` required (22dBm default overdrives PA to ~47dBm, causing current
+  `TX_GAIN_LORA=25`, `SX126X_PA_RAMP_US=0x07` (3400us ramp). PA has no enable pin
-  spikes and system reset even at low tx_power settings)
+  and draws high transient current on TX; default 22dBm/200us-ramp causes BOD reset.
+  POFCON disabled in `variant_nrf52LoopHook()` to prevent POFWARN -> lfs_assert
+  -> reboot chain.
 - **GPS**: u-blox (no EN pin)
 - **Battery ADC**: 0.5 voltage divider (equal resistors)
 

variants/nrf52840/diy/moonshine_NRF52/variant.cpp

@@ -22,6 +22,13 @@
 #include "nrf.h"
 #include "wiring_constants.h"
 #include "wiring_digital.h"
+#include "SEGGER_RTT.h"
+
+extern "C" {
+#include "nrf_soc.h"
+}
+
+static bool pofcon_disabled = false;
 
 const uint32_t g_ADigitalPinMap[] = {
     // P0
@@ -32,7 +39,22 @@ const uint32_t g_ADigitalPinMap[] = {
 
 void initVariant()
 {
-    // No dedicated 3V3 enable pin on this board
+    // Configure P0.18 as RESET pin (UICR->PSELRESET).
+    // nrf52_recover (ERASEALL) clears UICR to 0xFFFFFFFF, disabling reset.
+    // SystemInit() should do this via CONFIG_GPIO_AS_PINRESET, but that code path
+    // is not compiled in by the Adafruit core. Write UICR directly here - this
+    // runs before SoftDevice is enabled, so NVMC is accessible.
+    if ((NRF_UICR->PSELRESET[0] != 18) || (NRF_UICR->PSELRESET[1] != 18)) {
+        NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos;
+        while (NRF_NVMC->READY == NVMC_READY_READY_Busy) {}
+        NRF_UICR->PSELRESET[0] = 18;
+        while (NRF_NVMC->READY == NVMC_READY_READY_Busy) {}
+        NRF_UICR->PSELRESET[1] = 18;
+        while (NRF_NVMC->READY == NVMC_READY_READY_Busy) {}
+        NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos;
+        while (NRF_NVMC->READY == NVMC_READY_READY_Busy) {}
+        NVIC_SystemReset(); // Reboot to apply PSELRESET (hardware reconfigures P0.18)
+    }
 }
 
 void variant_shutdown()
@@ -41,3 +63,24 @@ void variant_shutdown()
     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
 }
+
+void variant_nrf52LoopHook(void)
+{
+    // Debug: toggle P0.11 to confirm this hook is called
+    static bool initialized = false;
+    if (!initialized) {
+        nrf_gpio_cfg_output(11);
+        initialized = true;
+    }
+    nrf_gpio_pin_toggle(11);
+
+    // Disable POFCON via SoftDevice API - direct NRF_POWER->POFCON writes are
+    // ignored once SoftDevice is enabled. E22-400M33S TX causes transient VDD
+    // drops that trigger POFWARN -> lfs_assert -> NVIC_SystemReset.
+    static uint32_t retry_count = 0;
+    if (retry_count < 3) {
+        uint32_t ret = sd_power_pof_enable(0);
+        SEGGER_RTT_printf(0, "variant_loop: ret=%d POFCON=0x%x\r\n", ret, NRF_POWER->POFCON);
+        retry_count++;
+    }
+}

variants/nrf52840/diy/moonshine_NRF52/variant.h

@@ -114,11 +114,14 @@ MOONSHINE NRF52 PIN ASSIGNMENT (RF-BM-ND05)
 #define USE_SX1268 // E22-400M33S uses SX1268 (433MHz)
 
 // E22-400M33S: 33dBm/2W module with ~25dB PA gain
-// SX1268 outputs 8dBm -> PA -> 33dBm (2W)
+// SX1268 outputs 2dBm -> PA -> 27dBm (~500mW), reduced PA current to avoid BOD reset
 // 22dBm default would overdrive PA to ~47dBm, causing current spikes and system reset
-#define SX126X_MAX_POWER 8
+#define SX126X_MAX_POWER 2
 #define TX_GAIN_LORA 25
 
+// PA ramp time: 3400us (default 200us), reduce transient current spikes during TX
+#define SX126X_PA_RAMP_US 0x07
+
 // SX126X CONFIG
 #define SX126X_CS (0 + 29)       // P0.29 FIXME - we really should define LORA_CS instead
 #define SX126X_DIO1 (0 + 21)     // P0.21 IRQ
@@ -126,8 +129,7 @@ MOONSHINE NRF52 PIN ASSIGNMENT (RF-BM-ND05)
                                  // so it needs connecting externally if it is used in this way
 #define SX126X_BUSY (0 + 22)     // P0.22
 #define SX126X_RESET (0 + 23)    // P0.23
-#define SX126X_RXEN (0 + 11)     // P0.11
+#define SX126X_TXEN RADIOLIB_NC  // DIO2 controls TXEN directly; RXEN left floating (module default)
-#define SX126X_TXEN RADIOLIB_NC  // Assuming that DIO2 is connected to TXEN pin. If not, TXEN must be connected.
 
 #define SX126X_DIO3_TCXO_VOLTAGE 1.8
 #define TCXO_OPTIONAL // make it so that the firmware can try both TCXO and XTAL