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RH_STM32WLx.cpp

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+// RH_STM32WLx.cpp
+//
+// Copyright (C) 2023 Mike McCauley
+// $Id: RH_STM32WLx.cpp,v 1.27 2020/07/05 08:52:21 mikem Exp $
+//
+
+#include <RH_STM32WLx.h>
+#include <RHSUBGHZSPI.h>
+
+// Are we building for a suitable STM processor
+#if defined(SUBGHZSPI_BASE)
+
+// On this chip, the radio is connected by a dedicated, internal SPI interface  called SubGhz,
+// and accessed via our RHSUBGHZSPI
+static RHSUBGHZSPI subghzspi;
+
+// Set up radio management pins for various modes for your specific radio wiring
+// YOU MUST DO THIS FOR YOUR PARTICULAR RADIO. FAILURE TO SET
+// THIS UP PROPERLY WILL CERTAINLY PREVENT TRANSMISSION AT FULL
+// POWER AND POSSIBLY RECEPTION TOO
+#if (RH_PLATFORM == RH_PLATFORM_ARDUINO && defined(ARDUINO_LORA_E5_MINI))
+    // EG: Seeed WiO-E5 mini
+    // These LoRa-E5 modules have an RF switch but only use the high power PA
+    // Only 2 control pins are used
+
+    static RH_SX126x::RadioPinConfig radioPinConfig = {
+	.pinNumber = {PA4, PA5, RH_INVALID_PIN},
+	.configState = {
+	    {RH_SX126x::RadioPinConfigMode_IDLE,          LOW,  LOW},
+	    {RH_SX126x::RadioPinConfigMode_RX,            HIGH, LOW},
+	    {RH_SX126x::RadioPinConfigMode_TX_HIGH_POWER, LOW,  HIGH}, // low power not supported on this module
+	    {RH_SX126x::RadioPinConfigMode_EOT},
+	}
+    };
+#elif (RH_PLATFORM == RH_PLATFORM_ARDUINO && defined(ARDUINO_NUCLEO_WL55JC1))
+    // These devices have an RF switch and low and high power PAs
+    // 3 control pins are used
+	.pinNumber = {PC3, PC4, PC5},
+	.configState = {
+	    {RH_SX126x::RadioPinConfigMode_IDLE,          LOW,  LOW,   LOW},
+	    {RH_SX126x::RadioPinConfigMode_RX,            HIGH, HIGH,  LOW},
+	    {RH_SX126x::RadioPinConfigMode_TX_LOW_POWER,  HIGH, HIGH,  HIGH},
+	    {RH_SX126x::RadioPinConfigMode_TX_HIGH_POWER, HIGH, LOW,   HIGH},
+	    {RH_SX126x::RadioPinConfigMode_EOT},
+	}
+    };
+#else
+#warning RH_STM32WLx Do not know how to set radio control pins for this processor
+#endif
+
+RH_STM32WLx::RH_STM32WLx()
+    :
+    RH_SX126x(RH_INVALID_PIN, RH_INVALID_PIN, RH_INVALID_PIN, RH_INVALID_PIN, subghzspi, &radioPinConfig)
+{
+    SubGhz.setResetActive(true);
+    delay(2);
+    SubGhz.setResetActive(false);
+    delay(200); // After reset: else can get runt transmission during startup FIXME: wait until ready? No doesnt work
+}
+
+// Override the init() function becaue we need to adjust some things afterwards to suit this radio module
+bool RH_STM32WLx::init()
+{
+    bool ret = RH_SX126x::init(); // In STDBY mode after this
+    
+    setDIO2AsRfSwitchCtrl(false); // Dont use DIO2 as RF control for Wio-E5, which uses separate pins  FIXME: not correct for NICERF
+    setTCXO(1.7, 5000); // MUST do this (in standby mode) else get no output. volts, us
+    return ret;
+}
+
+bool RH_STM32WLx::setupInterruptHandler()
+{
+    // It is necessary to use the SUBGHZ SPI radio interface and its built-in interrupt support
+    // BUT: only the first one can be used if RHSUBGHZSPI is in use
+    // This is is a modern lambda to attach a C++ function as an ordinary C callback
+    // Hopefuly this will compile successfully everywhere. If not let us know and we will
+    // change it to something more backwards compatible
+    SubGhz.attachInterrupt([this]() {
+	handleInterrupt();
+    });
+
+    return true;
+}
+
+
+#endif