fix: TCXO_OPTIONAL featuring SenseCAP Indicator (V1/V2) (#5948)

* fix TCXO_OPTIONAL

* fix LOG_WARN

* fix lora.begin() returns -707

* trunk fmt

src/main.cpp

@@ -115,10 +115,6 @@ AccelerometerThread *accelerometerThread = nullptr;
 AudioThread *audioThread = nullptr;
 #endif
 
-#if defined(TCXO_OPTIONAL)
-float tcxoVoltage = SX126X_DIO3_TCXO_VOLTAGE; // if TCXO is optional, put this here so it can be changed further down.
-#endif
-
 using namespace concurrency;
 
 volatile static const char slipstreamTZString[] = USERPREFS_TZ_STRING;
@@ -928,13 +924,16 @@ void setup()
 
 #if defined(USE_SX1262) && !defined(ARCH_PORTDUINO) && !defined(TCXO_OPTIONAL) && RADIOLIB_EXCLUDE_SX126X != 1
     if ((!rIf) && (config.lora.region != meshtastic_Config_LoRaConfig_RegionCode_LORA_24)) {
-        rIf = new SX1262Interface(RadioLibHAL, SX126X_CS, SX126X_DIO1, SX126X_RESET, SX126X_BUSY);
-        if (!rIf->init()) {
+        auto *sxIf = new SX1262Interface(RadioLibHAL, SX126X_CS, SX126X_DIO1, SX126X_RESET, SX126X_BUSY);
+#ifdef SX126X_DIO3_TCXO_VOLTAGE
+        sxIf->setTCXOVoltage(SX126X_DIO3_TCXO_VOLTAGE);
+#endif
+        if (!sxIf->init()) {
             LOG_WARN("No SX1262 radio");
-            delete rIf;
-            rIf = NULL;
+            delete sxIf;
         } else {
             LOG_INFO("SX1262 init success");
+            rIf = sxIf;
             radioType = SX1262_RADIO;
         }
     }
@@ -942,29 +941,28 @@ void setup()
 
 #if defined(USE_SX1262) && !defined(ARCH_PORTDUINO) && defined(TCXO_OPTIONAL)
     if ((!rIf) && (config.lora.region != meshtastic_Config_LoRaConfig_RegionCode_LORA_24)) {
-        // Try using the specified TCXO voltage
-        rIf = new SX1262Interface(RadioLibHAL, SX126X_CS, SX126X_DIO1, SX126X_RESET, SX126X_BUSY);
-        if (!rIf->init()) {
-            LOG_WARN("No SX1262 radio with TCXO, Vref %f V", tcxoVoltage);
-            delete rIf;
-            rIf = NULL;
-            tcxoVoltage = 0; // if it fails, set the TCXO voltage to zero for the next attempt
+        // try using the specified TCXO voltage
+        auto *sxIf = new SX1262Interface(RadioLibHAL, SX126X_CS, SX126X_DIO1, SX126X_RESET, SX126X_BUSY);
+        sxIf->setTCXOVoltage(SX126X_DIO3_TCXO_VOLTAGE);
+        if (!sxIf->init()) {
+            LOG_WARN("No SX1262 radio with TCXO, Vref %fV", SX126X_DIO3_TCXO_VOLTAGE);
+            delete sxIf;
         } else {
-            LOG_WARN("SX1262 init success, TCXO, Vref %f V", tcxoVoltage);
+            LOG_INFO("SX1262 init success, TCXO, Vref %fV", SX126X_DIO3_TCXO_VOLTAGE);
+            rIf = sxIf;
             radioType = SX1262_RADIO;
         }
     }
 
     if ((!rIf) && (config.lora.region != meshtastic_Config_LoRaConfig_RegionCode_LORA_24)) {
-        // If specified TCXO voltage fails, attempt to use DIO3 as a reference instea
+        // If specified TCXO voltage fails, attempt to use DIO3 as a reference instead
         rIf = new SX1262Interface(RadioLibHAL, SX126X_CS, SX126X_DIO1, SX126X_RESET, SX126X_BUSY);
         if (!rIf->init()) {
-            LOG_WARN("No SX1262 radio with XTAL, Vref %f V", tcxoVoltage);
+            LOG_WARN("No SX1262 radio with XTAL, Vref 0.0V");
             delete rIf;
             rIf = NULL;
-            tcxoVoltage = SX126X_DIO3_TCXO_VOLTAGE; // if it fails, set the TCXO voltage back for the next radio search
         } else {
-            LOG_INFO("SX1262 init success, XTAL, Vref %f V", tcxoVoltage);
+            LOG_INFO("SX1262 init success, XTAL, Vref 0.0V");
             radioType = SX1262_RADIO;
         }
     }

src/mesh/SX126xInterface.cpp

@@ -50,22 +50,13 @@ template <typename T> bool SX126xInterface<T>::init()
 #endif
 
 #if ARCH_PORTDUINO
-    float tcxoVoltage = (float)settingsMap[dio3_tcxo_voltage] / 1000;
+    tcxoVoltage = (float)settingsMap[dio3_tcxo_voltage] / 1000;
     if (settingsMap[sx126x_ant_sw_pin] != RADIOLIB_NC) {
         digitalWrite(settingsMap[sx126x_ant_sw_pin], HIGH);
         pinMode(settingsMap[sx126x_ant_sw_pin], OUTPUT);
     }
-// FIXME: correct logic to default to not using TCXO if no voltage is specified for SX126X_DIO3_TCXO_VOLTAGE
-#elif !defined(SX126X_DIO3_TCXO_VOLTAGE)
-    float tcxoVoltage =
-        0; // "TCXO reference voltage to be set on DIO3. Defaults to 1.6 V, set to 0 to skip." per
-           // https://github.com/jgromes/RadioLib/blob/690a050ebb46e6097c5d00c371e961c1caa3b52e/src/modules/SX126x/SX126x.h#L471C26-L471C104
-    // (DIO3 is free to be used as an IRQ)
-#elif !defined(TCXO_OPTIONAL)
-    float tcxoVoltage = SX126X_DIO3_TCXO_VOLTAGE;
-    // (DIO3 is not free to be used as an IRQ)
 #endif
-    if (tcxoVoltage == 0)
+    if (tcxoVoltage == 0.0)
         LOG_DEBUG("SX126X_DIO3_TCXO_VOLTAGE not defined, not using DIO3 as TCXO reference voltage");
     else
         LOG_DEBUG("SX126X_DIO3_TCXO_VOLTAGE defined, using DIO3 as TCXO reference voltage at %f V", tcxoVoltage);
@@ -83,7 +74,7 @@ template <typename T> bool SX126xInterface<T>::init()
     int res = lora.begin(getFreq(), bw, sf, cr, syncWord, power, preambleLength, tcxoVoltage, useRegulatorLDO);
     // \todo Display actual typename of the adapter, not just `SX126x`
     LOG_INFO("SX126x init result %d", res);
-    if (res == RADIOLIB_ERR_CHIP_NOT_FOUND)
+    if (res == RADIOLIB_ERR_CHIP_NOT_FOUND || res == RADIOLIB_ERR_SPI_CMD_FAILED)
         return false;
 
     LOG_INFO("Frequency set to %f", getFreq());

src/mesh/SX126xInterface.h

@@ -28,8 +28,11 @@ template <class T> class SX126xInterface : public RadioLibInterface
 
     bool isIRQPending() override { return lora.getIrqFlags() != 0; }
 
+    void setTCXOVoltage(float voltage) { tcxoVoltage = voltage; }
+
   protected:
     float currentLimit = 140; // Higher OCP limit for SX126x PA
+    float tcxoVoltage = 0.0;
 
     /**
      * Specific module instance

variants/diy/nrf52_promicro_diy_tcxo/variant.h

@@ -184,7 +184,6 @@ settings.
 
 #define SX126X_DIO3_TCXO_VOLTAGE 1.8
 #define TCXO_OPTIONAL // make it so that the firmware can try both TCXO and XTAL
-extern float tcxoVoltage; // make this available everywhere
 
 #ifdef __cplusplus
 }

variants/seeed-sensecap-indicator/variant.h

@@ -70,5 +70,8 @@
 #define SX126X_RESET LORA_RESET
 #define SX126X_DIO2_AS_RF_SWITCH
 
+#define TCXO_OPTIONAL // handle Indicator V1 and V2
+#define SX126X_DIO3_TCXO_VOLTAGE 1.8
+
 #define USE_VIRTUAL_KEYBOARD 1
 #define DISPLAY_CLOCK_FRAME 1