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67 lines
2.6 KiB
C++
67 lines
2.6 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 "Arduino.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 - pins 0 and 1 are hardwired for xtal and should never be enabled
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0xff, 0xff, 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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// No plain GPIO LEDs on this board (only WS2812 addressable LEDs, not driven here).
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}
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// Reproduces the vendor firmware's boot sequence from
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// examples/original_test/original_test.ino. Runs before Meshtastic touches
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// PIN_POWER_EN, so the RT9080 LDO gets a clean reset pulse and peripherals
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// whose EN pins must be LOW at boot (GPS_EN, GPS_RF_EN, BUZZER) aren't left
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// floating while the 3V3 rail is ramping.
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void earlyInitVariant()
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{
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// 3.3V rail: toggle RT9080_EN HIGH → LOW → HIGH with 100 ms dwell so the
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// LDO enters enable from a known state. The single-shot HIGH in main.cpp
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// is not enough on this hardware — if the chip was in a half-enabled
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// state from a previous reset, the rail brown-outs once LoRa TX fires.
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pinMode(PIN_POWER_EN, OUTPUT);
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digitalWrite(PIN_POWER_EN, HIGH);
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delay(100);
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digitalWrite(PIN_POWER_EN, LOW);
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delay(100);
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digitalWrite(PIN_POWER_EN, HIGH);
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delay(100);
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// Park peripherals with active-high enables LOW so they don't sink
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// current while the rest of setup() runs.
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pinMode(PIN_GPS_STANDBY, OUTPUT);
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digitalWrite(PIN_GPS_STANDBY, LOW);
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pinMode(PIN_GPS_RESET, OUTPUT);
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digitalWrite(PIN_GPS_RESET, LOW);
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pinMode(PIN_BUZZER, OUTPUT);
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digitalWrite(PIN_BUZZER, LOW);
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}
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