1 files changed, 48 insertions, 0 deletions
diff --git a/src/Hardware/I2C.h b/src/Hardware/I2C.h
new file mode 100644
index 00000000..46fe135f
--- /dev/null
+++ b/src/Hardware/I2C.h
@@ -0,0 +1,48 @@
+/*
+ * I2C.h
+ *
+ *  Created on: 13 May 2019
+ *      Author: David
+ */
+
+#ifndef SRC_HARDWARE_I2C_H_
+#define SRC_HARDWARE_I2C_H_
+
+#include "Wire.h"
+#include "RepRapFirmware.h"
+#include "Tasks.h"
+
+namespace I2C
+{
+	void Init();
+
+#ifdef I2C_IFACE
+
+#ifdef RTOS
+
+	uint32_t statusWaitFunc(Twi *twi, uint32_t bitsToWaitFor);
+
+	// Transfer data to/from an I2C peripheral.
+	// If the caller needs to do multiple I2C transactions without being interrupted, it should own the i2C mutex before calling this.
+	// Otherwise the caller need nort own the mutex because it will be acquired here.
+	inline size_t Transfer(uint16_t address, uint8_t *buffer, size_t numToWrite, size_t numToRead)
+	{
+		MutexLocker Lock(Tasks::GetI2CMutex());
+		return I2C_IFACE.Transfer(address, buffer, numToWrite, numToRead, statusWaitFunc);
+	}
+
+#else
+
+	// Transfer data to/from an I2C peripheral
+	inline size_t Transfer(uint16_t address, uint8_t *buffer, size_t numToWrite, size_t numToRead)
+	{
+		return I2C_IFACE.Transfer(address, buffer, numToWrite, numToRead);
+	}
+
+#endif
+
+#endif
+
+}
+
+#endif /* SRC_HARDWARE_I2C_H_ */