kevin
325bc2b2c4
DIY Meshtastic node using an Ebyte nRF52840 MCU module with LFXO crystal and E22-400M33S LoRa module (SX1268, 433MHz, 33dBm). Pin assignments: - LED (LED_PAIRING): P0.15, LED_LORA DIO1: P1.10, BUSY: P0.28 (AIN4) - LORA_CS: P0.17, RESET: P1.13, RXEN: P1.09, SPI: P0.20/P0.22/P1.00 - VBAT_ADC: P0.03 (0.5 divider), CHAG_DET: P0.13, BUZZER: P1.11 - BUTTON: P0.24, I2C: SDA=P0.08/SCL=P0.04 (wired, no devices) PA parameters derived from E22-M UserManual V1.2 power curve (not from E22-900M33S which uses a different PA with 25dB gain): - SX126X_MAX_POWER=21, TX_GAIN_LORA=12 (chip 21dBm -> module ~33.5dBm) - DIO2_AS_RF_SWITCH with MCU-controlled RXEN, TCXO 1.8V (TCXO_OPTIONAL) USB CDC serial enabled by default (nRF52840 built-in). No GPS/screen/ I2C devices. Uses S140 v6 SoftDevice (matches nice!nano bootloader). Flashable via USB (1200bps touch DFU) or UF2 drag-and-drop.
65 lines
2.7 KiB
C++
65 lines
2.7 KiB
C++
/*
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Copyright (c) 2014-2015 Arduino LLC. All right reserved.
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Copyright (c) 2016 Sandeep Mistry All right reserved.
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Copyright (c) 2018, Adafruit Industries (adafruit.com)
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "variant.h"
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#include "nrf.h"
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#include "wiring_constants.h"
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#include "wiring_digital.h"
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const uint32_t g_ADigitalPinMap[] = {
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// P0
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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// P1
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32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47};
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void initVariant()
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{
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// Configure P0.18 as RESET pin (UICR->PSELRESET).
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// nrf52_recover (ERASEALL) clears UICR to 0xFFFFFFFF, disabling reset.
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// SystemInit() already handles this via CONFIG_GPIO_AS_PINRESET; this is a
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// safety net that runs before SoftDevice is enabled, so NVMC is accessible.
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if ((NRF_UICR->PSELRESET[0] != 18) || (NRF_UICR->PSELRESET[1] != 18)) {
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NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos;
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while (NRF_NVMC->READY == NVMC_READY_READY_Busy) {}
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NRF_UICR->PSELRESET[0] = 18;
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while (NRF_NVMC->READY == NVMC_READY_READY_Busy) {}
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NRF_UICR->PSELRESET[1] = 18;
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while (NRF_NVMC->READY == NVMC_READY_READY_Busy) {}
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NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos;
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while (NRF_NVMC->READY == NVMC_READY_READY_Busy) {}
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NVIC_SystemReset(); // Reboot to apply PSELRESET (hardware reconfigures P0.18)
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}
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// Initialize pairing LED pin (StatusLEDModule only calls digitalWrite, not pinMode)
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pinMode(LED_PAIRING, OUTPUT);
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digitalWrite(LED_PAIRING, LED_STATE_ON ^ 1); // OFF
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}
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void variant_shutdown()
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{
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// Turn off pairing LED
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nrf_gpio_pin_write(LED_PAIRING, LED_STATE_ON ^ 1);
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nrf_gpio_cfg_input(BUTTON_PIN, NRF_GPIO_PIN_PULLUP); // Enable internal pull-up on the button pin
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nrf_gpio_pin_sense_t sense = NRF_GPIO_PIN_SENSE_LOW; // Configure SENSE signal on low edge
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nrf_gpio_cfg_sense_set(BUTTON_PIN, sense); // Apply SENSE to wake up the device from the deep sleep
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}
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