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- MeshCore-based Simple Sensor firmware - Heltec T114 without display - BME280 sensor support (temp/humidity/pressure) - Radio: 868.856018 MHz, SF7, BW62.5 kHz, CR4/7 - 2-byte path hash - PlatformIO project
67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
#include <Arduino.h>
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#include <Wire.h>
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#include "RAK3401Board.h"
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#ifdef NRF52_POWER_MANAGEMENT
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// Static configuration for power management
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// Values set in variant.h defines
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const PowerMgtConfig power_config = {
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.lpcomp_ain_channel = PWRMGT_LPCOMP_AIN,
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.lpcomp_refsel = PWRMGT_LPCOMP_REFSEL,
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.voltage_bootlock = PWRMGT_VOLTAGE_BOOTLOCK
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};
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void RAK3401Board::initiateShutdown(uint8_t reason) {
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// Disable SKY66122 FEM (CSD+CPS LOW = shutdown, <1 uA)
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digitalWrite(SX126X_POWER_EN, LOW);
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// Disable 3V3 switched peripherals and 5V boost
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digitalWrite(PIN_3V3_EN, LOW);
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if (reason == SHUTDOWN_REASON_LOW_VOLTAGE ||
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reason == SHUTDOWN_REASON_BOOT_PROTECT) {
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configureVoltageWake(power_config.lpcomp_ain_channel, power_config.lpcomp_refsel);
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}
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enterSystemOff(reason);
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}
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#endif
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void RAK3401Board::begin() {
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NRF52BoardDCDC::begin();
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pinMode(PIN_VBAT_READ, INPUT);
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#ifdef PIN_USER_BTN
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pinMode(PIN_USER_BTN, INPUT_PULLUP);
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#endif
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#ifdef PIN_USER_BTN_ANA
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pinMode(PIN_USER_BTN_ANA, INPUT_PULLUP);
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#endif
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#if defined(PIN_BOARD_SDA) && defined(PIN_BOARD_SCL)
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Wire.setPins(PIN_BOARD_SDA, PIN_BOARD_SCL);
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#endif
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Wire.begin();
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// PIN_3V3_EN (WB_IO2, P0.34) controls the 3V3_S switched peripheral rail
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// AND the 5V boost regulator (U5) on the RAK13302 that powers the SKY66122 PA.
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// Must stay HIGH during radio operation — do not toggle for power saving.
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pinMode(PIN_3V3_EN, OUTPUT);
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digitalWrite(PIN_3V3_EN, HIGH);
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// Enable SKY66122-11 FEM on the RAK13302 module.
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// CSD and CPS are tied together on the RAK13302 PCB, routed to IO3 (P0.21).
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// HIGH = FEM active (LNA for RX, PA path available for TX).
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// TX/RX switching (CTX) is handled by SX1262 DIO2 via SetDIO2AsRfSwitchCtrl.
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pinMode(SX126X_POWER_EN, OUTPUT);
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#ifdef NRF52_POWER_MANAGEMENT
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// Boot voltage protection check (may not return if voltage too low)
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// We need to call this after we configure SX126X_POWER_EN as output but before we pull high
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checkBootVoltage(&power_config);
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#endif
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digitalWrite(SX126X_POWER_EN, HIGH);
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delay(1); // SKY66122 turn-on settling time (tON = 3us typ)
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}
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