1 files changed, 63 insertions, 0 deletions
diff --git a/src/Heating/Sensors/SpiTemperatureSensor.cpp b/src/Heating/Sensors/SpiTemperatureSensor.cpp
new file mode 100644
index 00000000..dbf6c5b7
--- /dev/null
+++ b/src/Heating/Sensors/SpiTemperatureSensor.cpp
@@ -0,0 +1,63 @@
+/*
+ * SpiTemperatureSensor.cpp
+ *
+ *  Created on: 8 Jun 2017
+ *      Author: David
+ */
+
+#include "SpiTemperatureSensor.h"
+
+SpiTemperatureSensor::SpiTemperatureSensor(unsigned int channel, const char *name, unsigned int relativeChannel, uint8_t spiMode, uint32_t clockFrequency)
+	: TemperatureSensor(channel, name)
+{
+	device.csPin = SpiTempSensorCsPins[relativeChannel];
+	device.spiMode = spiMode;
+	device.clockFrequency = clockFrequency;
+	lastTemperature = 0.0;
+	lastResult = TemperatureError::notInitialised;
+}
+
+void SpiTemperatureSensor::InitSpi()
+{
+	sspi_master_init(&device, 8);
+	lastReadingTime = millis();
+}
+
+// Send and receive 1 to 4 bytes of data and return the result as a single 32-bit word
+TemperatureError SpiTemperatureSensor::DoSpiTransaction(const uint8_t dataOut[], size_t nbytes, uint32_t& rslt) const
+{
+	if (!sspi_acquire())
+	{
+		return TemperatureError::busBusy;
+	}
+
+	sspi_master_setup_device(&device);
+	delayMicroseconds(1);
+	sspi_select_device(&device);
+	delayMicroseconds(1);
+
+	uint8_t rawBytes[4];
+	spi_status_t sts = sspi_transceive_packet(dataOut, rawBytes, nbytes);
+
+	delayMicroseconds(1);
+	sspi_deselect_device(&device);
+	delayMicroseconds(1);
+
+	sspi_release();
+
+	if (sts != SPI_OK)
+	{
+		return TemperatureError::timeout;
+	}
+
+	rslt = rawBytes[0];
+	for (size_t i = 1; i < nbytes; ++i)
+	{
+		rslt <<= 8;
+		rslt |= rawBytes[i];
+	}
+
+	return TemperatureError::success;
+}
+
+// End