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SX1262 LDO Support

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- Added build flag "SX126X_USE_REGULATOR_LDO" (set to 1 to enable) to use LDO for the SX1262 radio instead of DC-DC when the DCDC pin isn't wired up (e.g. t-echo lite)
- Added additional debug mode diagnostic messages during SX1262 init to better highlight faults
This commit is contained in:
entr0p1
2026-06-30 16:55:16 +10:00
parent 1869b57d62
commit 2cb3a29fa8
1 changed files with 14 additions and 2 deletions
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src/helpers/radiolib/CustomSX1262.h
+14 -2
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@@ -1,6 +1,7 @@
#pragma once
#include <RadioLib.h>
#include "MeshCore.h"
#define SX126X_IRQ_HEADER_VALID 0b0000010000 // 4 4 valid LoRa header received
#define SX126X_IRQ_PREAMBLE_DETECTED 0x04
@@ -27,6 +28,14 @@ class CustomSX1262 : public SX1262 {
uint8_t cr = 5;
#endif
#ifdef SX126X_USE_REGULATOR_LDO
constexpr bool useRegulatorLDO = SX126X_USE_REGULATOR_LDO;
#else
constexpr bool useRegulatorLDO = false;
#endif
MESH_DEBUG_PRINTLN("SX1262 regulator requested: %s", useRegulatorLDO ? "LDO" : "DC-DC");
#if defined(P_LORA_SCLK)
#ifdef NRF52_PLATFORM
if (spi) { spi->setPins(P_LORA_MISO, P_LORA_SCLK, P_LORA_MOSI); spi->begin(); }
@@ -42,11 +51,12 @@ class CustomSX1262 : public SX1262 {
if (spi) spi->begin(P_LORA_SCLK, P_LORA_MISO, P_LORA_MOSI);
#endif
#endif
int status = begin(LORA_FREQ, LORA_BW, LORA_SF, cr, RADIOLIB_SX126X_SYNC_WORD_PRIVATE, LORA_TX_POWER, 16, tcxo);
int status = begin(LORA_FREQ, LORA_BW, LORA_SF, cr, RADIOLIB_SX126X_SYNC_WORD_PRIVATE, LORA_TX_POWER, 16, tcxo, useRegulatorLDO);
// if radio init fails with -707/-706, try again with tcxo voltage set to 0.0f
if (status == RADIOLIB_ERR_SPI_CMD_FAILED || status == RADIOLIB_ERR_SPI_CMD_INVALID) {
MESH_DEBUG_PRINTLN("SX1262 init failed with error %d, retrying with TCXO at 0.0V", status);
tcxo = 0.0f;
status = begin(LORA_FREQ, LORA_BW, LORA_SF, cr, RADIOLIB_SX126X_SYNC_WORD_PRIVATE, LORA_TX_POWER, 16, tcxo);
status = begin(LORA_FREQ, LORA_BW, LORA_SF, cr, RADIOLIB_SX126X_SYNC_WORD_PRIVATE, LORA_TX_POWER, 16, tcxo, useRegulatorLDO);
}
if (status != RADIOLIB_ERR_NONE) {
Serial.print("ERROR: radio init failed: ");
@@ -83,6 +93,8 @@ class CustomSX1262 : public SX1262 {
writeRegister(0x8B5, &r_data, 1);
#endif
MESH_DEBUG_PRINTLN("SX1262 status=0x%02X device_errors=0x%04X", getStatus(), getDeviceErrors());
return true; // success
}