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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
74 lines
2.0 KiB
C++
74 lines
2.0 KiB
C++
#ifdef XIAO_NRF52
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#include <Arduino.h>
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#include <Wire.h>
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#include "XiaoNrf52Board.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 XiaoNrf52Board::initiateShutdown(uint8_t reason) {
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bool enable_lpcomp = (reason == SHUTDOWN_REASON_LOW_VOLTAGE ||
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reason == SHUTDOWN_REASON_BOOT_PROTECT);
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pinMode(VBAT_ENABLE, OUTPUT);
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digitalWrite(VBAT_ENABLE, enable_lpcomp ? LOW : HIGH);
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if (enable_lpcomp) {
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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 // NRF52_POWER_MANAGEMENT
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void XiaoNrf52Board::begin() {
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NRF52BoardDCDC::begin();
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// Configure battery voltage ADC
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pinMode(PIN_VBAT, INPUT);
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pinMode(VBAT_ENABLE, OUTPUT);
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digitalWrite(VBAT_ENABLE, LOW); // Enable VBAT divider for reading
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analogReadResolution(12);
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analogReference(AR_INTERNAL_3_0);
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delay(50); // Allow ADC to settle
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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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#if defined(PIN_WIRE_SDA) && defined(PIN_WIRE_SCL)
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Wire.setPins(PIN_WIRE_SDA, PIN_WIRE_SCL);
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#endif
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Wire.begin();
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#ifdef P_LORA_TX_LED
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pinMode(P_LORA_TX_LED, OUTPUT);
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digitalWrite(P_LORA_TX_LED, HIGH);
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#endif
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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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checkBootVoltage(&power_config);
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#endif
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delay(10); // Give sx1262 some time to power up
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}
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uint16_t XiaoNrf52Board::getBattMilliVolts() {
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// https://wiki.seeedstudio.com/XIAO_BLE#q3-what-are-the-considerations-when-using-xiao-nrf52840-sense-for-battery-charging
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// VBAT_ENABLE must be LOW to read battery voltage
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digitalWrite(VBAT_ENABLE, LOW);
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int adcvalue = analogRead(PIN_VBAT);
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return (adcvalue * ADC_MULTIPLIER * AREF_VOLTAGE) / 4.096;
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}
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#endif |