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101 lines
2.8 KiB
101 lines
2.8 KiB
#include <Arduino.h>
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#include <Wire.h>
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#include "nrf_gpio.h"
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#include "RAK4631Board.h"
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#ifdef ETHERNET_ENABLED
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// Drive WB_IO2 HIGH as early as possible using direct register access.
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// WB_IO2 (P1.02, Arduino pin 34) controls the WisBlock slot power switch.
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// With POE through RAK13800, this must be enabled before the framework
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// initializes or the board will brownout from insufficient power delivery.
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// Priority 102 runs just after SystemInit.
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static void __attribute__((constructor(102))) rak4631_early_poe_power() {
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nrf_gpio_cfg_output(NRF_GPIO_PIN_MAP(1, 2)); // WB_IO2 = P1.02
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nrf_gpio_pin_set(NRF_GPIO_PIN_MAP(1, 2));
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}
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#endif
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#ifdef BOOT_DIAG
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// Diagnostic LED blink: N short blinks on green LED to indicate boot stage
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static void diag_blink(uint8_t count) {
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pinMode(PIN_LED1, OUTPUT);
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for (uint8_t i = 0; i < count; i++) {
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digitalWrite(PIN_LED1, HIGH);
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delay(100);
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digitalWrite(PIN_LED1, LOW);
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delay(150);
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}
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delay(300);
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}
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#else
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#define diag_blink(n) ((void)0)
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#endif
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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 RAK4631Board::initiateShutdown(uint8_t reason) {
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// Disable LoRa module power before shutdown
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digitalWrite(SX126X_POWER_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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if (!configureVoltageWake(power_config.lpcomp_ain_channel, power_config.lpcomp_refsel)) {
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NVIC_SystemReset();
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}
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}
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enterSystemOff(reason);
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}
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#endif // NRF52_POWER_MANAGEMENT
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void RAK4631Board::begin() {
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diag_blink(1); // Stage 1: entering begin()
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#ifdef DISABLE_DCDC
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NRF52Board::begin();
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#else
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NRF52BoardDCDC::begin();
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#endif
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diag_blink(2); // Stage 2: board base init done
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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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diag_blink(3); // Stage 3: I2C done, about to configure LoRa power
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pinMode(SX126X_POWER_EN, OUTPUT);
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#if defined(NRF52_POWER_MANAGEMENT) && !defined(DISABLE_BOOT_PROTECTION)
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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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diag_blink(4); // Stage 4: power check passed
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digitalWrite(SX126X_POWER_EN, HIGH);
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delay(10); // give sx1262 some time to power up
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diag_blink(5); // Stage 5: board.begin() complete
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}
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