mirror of
https://github.com/meshcore-dev/MeshCore.git
synced 2026-08-14 09:29:49 +00:00
Jody Bentley
5c534c4399
The M6's L76K GPS streams NMEA at 9600 baud on its own, but the firmware reported no GPS. Root cause: pin 29 (PIN_GPS_RESET / the module's REINIT line) was driven HIGH, which holds the L76K silent so it never emits any sentences and detection fails. variant.cpp drove pin 29 HIGH at boot, and because PIN_GPS_RESET was defined, MicroNMEALocationProvider also drove it HIGH in begin(). Bench testing on a sealed M6 (passive NMEA capture, no logic analyzer) confirmed: pin 29 driven HIGH = 0 bytes; pin 29 floating = full NMEA stream. Define GPS_RESET (-1) so the location provider never touches pin 29, and stop driving it in initVariant. This matches the Meshtastic M6 variant, which leaves the same pin as a floating input.
114 lines
3.6 KiB
C
114 lines
3.6 KiB
C
/*
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* variant.h
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* Copyright (C) 2023 Seeed K.K.
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* MIT License
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*/
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#pragma once
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#include "WVariant.h"
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////////////////////////////////////////////////////////////////////////////////
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// Low frequency clock source
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#define USE_LFXO // 32.768 kHz crystal oscillator
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#define VARIANT_MCK (64000000ul)
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#define WIRE_INTERFACES_COUNT (1)
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////////////////////////////////////////////////////////////////////////////////
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// Power
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#define PIN_PWR_EN (27)
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#define BATTERY_PIN (28)
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#define ADC_MULTIPLIER (1.75F)
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#define PIN_ADC_CTRL (11)
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#define ADC_RESOLUTION (12)
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#define BATTERY_SENSE_RES (12)
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#define AREF_VOLTAGE (3.0)
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////////////////////////////////////////////////////////////////////////////////
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// Number of pins
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#define PINS_COUNT (48)
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#define NUM_DIGITAL_PINS (48)
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#define NUM_ANALOG_INPUTS (1)
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#define NUM_ANALOG_OUTPUTS (0)
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////////////////////////////////////////////////////////////////////////////////
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// UART pin definition
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#define PIN_SERIAL1_RX PIN_GPS_TX
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#define PIN_SERIAL1_TX PIN_GPS_RX
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#define PIN_SERIAL2_RX (22)
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#define PIN_SERIAL2_TX (24)
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////////////////////////////////////////////////////////////////////////////////
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// I2C pin definition
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#define PIN_WIRE_SDA (41) // P1.9
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#define PIN_WIRE_SCL (8) // P0.8
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////////////////////////////////////////////////////////////////////////////////
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// SPI pin definition
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#define SPI_INTERFACES_COUNT (1)
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#define PIN_SPI_MISO (47)
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#define PIN_SPI_MOSI (46)
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#define PIN_SPI_SCK (45)
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//#define PIN_SPI_NSS (24)
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////////////////////////////////////////////////////////////////////////////////
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// Builtin LEDs
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#define PIN_LED_RED (12)
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#define PIN_LED_BLUE (7)
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#define LED_BLUE (-1)
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#define LED_BUILTIN PIN_LED_BLUE
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#define PIN_LED LED_BUILTIN
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#define LED_PIN LED_BUILTIN
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#define LED_STATE_ON HIGH
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////////////////////////////////////////////////////////////////////////////////
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// Builtin buttons
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#define PIN_BUTTON1 (17)
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#define BUTTON_PIN PIN_BUTTON1
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#define PIN_USER_BTN BUTTON_PIN
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////////////////////////////////////////////////////////////////////////////////
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// QSPI
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#define EXTERNAL_FLASH_DEVICES MX25R1635F
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#define EXTERNAL_FLASH_USE_QSPI
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#define PIN_QSPI_SCK (35)
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#define PIN_QSPI_CS (23)
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#define PIN_QSPI_IO0 (33) // MOSI if using two bit interface
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#define PIN_QSPI_IO1 (34) // MISO if using two bit interface
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#define PIN_QSPI_IO2 (36) // WP if using two bit interface (i.e. not used)
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#define PIN_QSPI_IO3 (37) // HOLD if using two bit interface (i.e. not used)
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#define QSPI_FLASH_EN (21)
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////////////////////////////////////////////////////////////////////////////////
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// GPS
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#define GPS_L76K
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#define PIN_GPS_RX (2)
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#define PIN_GPS_TX (3)
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#define PIN_GPS_EN (6) // EN
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#define PIN_GPS_RESET (29) // REINIT - must FLOAT; driving it (esp. HIGH) silences the L76K
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// The M6's L76K streams NMEA on its own and must not have its REINIT pin driven.
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// Tell the location provider there is no reset pin so it never touches pin 29
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// (driving it HIGH holds the module silent). Matches Meshtastic, which leaves
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// this pin as an input. See variant.cpp (pin 29 is intentionally not configured).
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#define GPS_RESET (-1)
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#define PIN_GPS_STANDBY (30) // STANDBY
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#define PIN_GPS_PPS (31)
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#define GPS_BAUD_RATE 9600
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