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| 1 | +#include "HeltecV4Board.h" |
| 2 | + |
| 3 | +void HeltecV4Board::begin() { |
| 4 | + ESP32Board::begin(); |
| 5 | + |
| 6 | + |
| 7 | + pinMode(PIN_ADC_CTRL, OUTPUT); |
| 8 | + digitalWrite(PIN_ADC_CTRL, LOW); // Initially inactive |
| 9 | + |
| 10 | + pinMode(P_LORA_PA_POWER, OUTPUT); |
| 11 | + digitalWrite(P_LORA_PA_POWER,HIGH); |
| 12 | + |
| 13 | + rtc_gpio_hold_dis((gpio_num_t)P_LORA_PA_EN); |
| 14 | + pinMode(P_LORA_PA_EN, OUTPUT); |
| 15 | + digitalWrite(P_LORA_PA_EN,HIGH); |
| 16 | + pinMode(P_LORA_PA_TX_EN, OUTPUT); |
| 17 | + digitalWrite(P_LORA_PA_TX_EN,LOW); |
| 18 | + |
| 19 | + |
| 20 | + periph_power.begin(); |
| 21 | + |
| 22 | + esp_reset_reason_t reason = esp_reset_reason(); |
| 23 | + if (reason == ESP_RST_DEEPSLEEP) { |
| 24 | + long wakeup_source = esp_sleep_get_ext1_wakeup_status(); |
| 25 | + if (wakeup_source & (1 << P_LORA_DIO_1)) { // received a LoRa packet (while in deep sleep) |
| 26 | + startup_reason = BD_STARTUP_RX_PACKET; |
| 27 | + } |
| 28 | + |
| 29 | + rtc_gpio_hold_dis((gpio_num_t)P_LORA_NSS); |
| 30 | + rtc_gpio_deinit((gpio_num_t)P_LORA_DIO_1); |
| 31 | + } |
| 32 | + } |
| 33 | + |
| 34 | + void HeltecV4Board::onBeforeTransmit(void) { |
| 35 | + digitalWrite(P_LORA_TX_LED, HIGH); // turn TX LED on |
| 36 | + digitalWrite(P_LORA_PA_TX_EN,HIGH); |
| 37 | + } |
| 38 | + |
| 39 | + void HeltecV4Board::onAfterTransmit(void) { |
| 40 | + digitalWrite(P_LORA_TX_LED, LOW); // turn TX LED off |
| 41 | + digitalWrite(P_LORA_PA_TX_EN,LOW); |
| 42 | + } |
| 43 | + |
| 44 | + void HeltecV4Board::enterDeepSleep(uint32_t secs, int pin_wake_btn) { |
| 45 | + esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH, ESP_PD_OPTION_ON); |
| 46 | + |
| 47 | + // Make sure the DIO1 and NSS GPIOs are hold on required levels during deep sleep |
| 48 | + rtc_gpio_set_direction((gpio_num_t)P_LORA_DIO_1, RTC_GPIO_MODE_INPUT_ONLY); |
| 49 | + rtc_gpio_pulldown_en((gpio_num_t)P_LORA_DIO_1); |
| 50 | + |
| 51 | + rtc_gpio_hold_en((gpio_num_t)P_LORA_NSS); |
| 52 | + |
| 53 | + rtc_gpio_hold_en((gpio_num_t)P_LORA_PA_EN); //It also needs to be enabled in receive mode |
| 54 | + |
| 55 | + if (pin_wake_btn < 0) { |
| 56 | + esp_sleep_enable_ext1_wakeup( (1L << P_LORA_DIO_1), ESP_EXT1_WAKEUP_ANY_HIGH); // wake up on: recv LoRa packet |
| 57 | + } else { |
| 58 | + esp_sleep_enable_ext1_wakeup( (1L << P_LORA_DIO_1) | (1L << pin_wake_btn), ESP_EXT1_WAKEUP_ANY_HIGH); // wake up on: recv LoRa packet OR wake btn |
| 59 | + } |
| 60 | + |
| 61 | + if (secs > 0) { |
| 62 | + esp_sleep_enable_timer_wakeup(secs * 1000000); |
| 63 | + } |
| 64 | + |
| 65 | + // Finally set ESP32 into sleep |
| 66 | + esp_deep_sleep_start(); // CPU halts here and never returns! |
| 67 | + } |
| 68 | + |
| 69 | + void HeltecV4Board::powerOff() { |
| 70 | + enterDeepSleep(0); |
| 71 | + } |
| 72 | + |
| 73 | + uint16_t HeltecV4Board::getBattMilliVolts() { |
| 74 | + analogReadResolution(10); |
| 75 | + digitalWrite(PIN_ADC_CTRL, HIGH); |
| 76 | + delay(10); |
| 77 | + uint32_t raw = 0; |
| 78 | + for (int i = 0; i < 8; i++) { |
| 79 | + raw += analogRead(PIN_VBAT_READ); |
| 80 | + } |
| 81 | + raw = raw / 8; |
| 82 | + |
| 83 | + digitalWrite(PIN_ADC_CTRL, LOW); |
| 84 | + |
| 85 | + return (5.42 * (3.3 / 1024.0) * raw) * 1000; |
| 86 | + } |
| 87 | + |
| 88 | + const char* HeltecV4Board::getManufacturerName() const { |
| 89 | + return "Heltec V4"; |
| 90 | + } |
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