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RHSUBGHZSPI.h

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+// RHSUBGHZSPI.h
+// Author: Mike McCauley (mikem@airspayce.com)
+// Copyright (C) 2023 Mike McCauley
+
+#ifndef RHSUBGHZSPI_h
+#define RHSUBGHZSPI_h
+
+#include <RHGenericSPI.h>
+
+// Are we building for a suitable STM processor
+#if defined(SUBGHZSPI_BASE)
+
+/////////////////////////////////////////////////////////////////////
+/// \class RHSUBGHZSPI RHSUBGHZSPI.h <RHSUBGHZSPI.h>
+/// \brief Base class for SPI interfacesInterface for SUBGHZSPIClass
+/// as used on eg Wio-E5 mini and other boards that use the Seeed LoRa-E5-HF, LoRa-E5-LF modules
+/// which use the  STM32WLE5JC family processors.
+///
+/// SubGhz is the SPI interface used on the STM32WLE5JC to communicate with the internal SX1261 radio,
+/// and it has some special methods needed to talk to the chip.
+///
+class RHSUBGHZSPI : public RHGenericSPI
+{
+public:
+    uint8_t transfer(uint8_t data) { return SubGhz.SPI.transfer(data); };
+
+    /// Initialise the software SPI library
+    /// Call this after configuring the SPI interface and before using it to transfer data.
+    /// Initializes the SPI bus by setting SCK, MOSI, and SS to outputs, pulling SCK and MOSI low, and SS high. 
+    void begin() { SubGhz.SPI.begin(); };
+
+    /// Disables the SPI bus usually, in this case
+    /// there is no hardware controller to disable.
+    void end() { SubGhz.SPI.end(); };
+
+    void beginTransaction() {
+	SubGhz.SPI.beginTransaction(SubGhz.spi_settings);
+	SubGhz.setNssActive(true);
+	while (SubGhz.isBusy()) /* wait */;
+    };
+    void endTransaction() {
+	SubGhz.setNssActive(false);
+	SubGhz.SPI.endTransaction();
+    };
+};
+
+#endif
+#endif