MUSTARDTIGERFPV
a413a361dd
An ExpressLRS 900 MHz transmitter module: ESP32-D0WDQ6, 4 MB flash, SX1276 driving an external PA through a DAC gain input on GPIO26. Pin values come from the ExpressLRS hardware layout for this target (Unified_ESP32_900_TX). The board brings out only RX_EN, so RadioLib's single-pin RF switch handling covers it. Note GPIO12 is both RX_EN and the MTDI flash-voltage strapping pin, so it must stay low through reset. Verified on hardware: boots, radio initialises, TX power changes take effect and are rejected outside the configured range, and the node repeats flood traffic. Uses dual_ota_1536k.csv, and 115200 for upload because the CH340 on this board corrupts transfers above 230400.
52 lines
1.8 KiB
C++
52 lines
1.8 KiB
C++
#include <Arduino.h>
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#include "target.h"
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ELRSTxBoard board;
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static SPIClass spi;
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RADIO_CLASS radio = new Module(P_LORA_NSS, P_LORA_DIO_0, P_LORA_RESET, P_LORA_DIO_1, spi);
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// The "power_values" array from the ExpressLRS hardware layout for this
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// module (ExpressLRS target "GEPRC LINKFLOW 900M TX", firmware
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// Unified_ESP32_900_TX), paired with the PowerLevels_e step each index maps
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// to. power_min is 0 on this board, so index 0 is PWR_10mW.
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static const DacPaLevel POWER_LEVELS[] = {
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{ 10, 30 }, // 10 mW
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{ 14, 40 }, // 25 mW
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{ 17, 50 }, // 50 mW <- ExpressLRS "power_default"
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{ 20, 60 }, // 100 mW
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{ 24, 80 }, // 250 mW
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{ 27, 90 }, // 500 mW
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{ 30, 130 }, // 1000 mW
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{ 33, 225 }, // 2000 mW <- above MAX_LORA_TX_POWER, see platformio.ini
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};
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// MAX_LORA_TX_POWER is the single definition of this board's ceiling: the CLI
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// validates against it, and the wrapper enforces it independently so a request
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// that gets past the CLI cannot saturate the amplifier at its top table entry.
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WRAPPER_CLASS radio_driver(radio, board, PIN_PA_APC2,
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POWER_LEVELS,
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sizeof(POWER_LEVELS) / sizeof(POWER_LEVELS[0]),
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MAX_LORA_TX_POWER);
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ESP32RTCClock fallback_clock;
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AutoDiscoverRTCClock rtc_clock(fallback_clock);
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SensorManager sensors;
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bool radio_init() {
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fallback_clock.begin();
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rtc_clock.begin(Wire);
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if (!radio.std_init(&spi)) return false;
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// std_init() left the SX1276 at LORA_TX_POWER, which on this board is a
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// post-amplifier number. Hand power control over to the amplifier instead.
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radio_driver.beginPowerControl(LORA_TX_POWER);
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return true;
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}
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mesh::LocalIdentity radio_new_identity() {
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RadioNoiseListener rng(radio);
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return mesh::LocalIdentity(&rng); // create new random identity
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}
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