Rename architecture specific driver files, to make them appear with uniquely identifying filenames in the documentation.

1 files changed, 144 insertions, 0 deletions

diff --git a/LUFA/Drivers/Peripheral/AVR8/TWI_AVR8.c b/LUFA/Drivers/Peripheral/AVR8/TWI_AVR8.c
new file mode 100644
index 000000000..b5f258dd3
--- /dev/null
+++ b/LUFA/Drivers/Peripheral/AVR8/TWI_AVR8.c
@@ -0,0 +1,144 @@
+/*
+     Copyright (C) Dean Camera, 2011.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+#define  __INCLUDE_FROM_TWI_C
+#include "TWI.h"
+
+uint8_t TWI_StartTransmission(const uint8_t SlaveAddress,
+                              const uint8_t TimeoutMS)
+{
+	for (;;)
+	{
+		bool     BusCaptured = false;
+		uint16_t TimeoutRemaining;
+
+		TWCR = ((1 << TWINT) | (1 << TWSTA) | (1 << TWEN));
+
+		TimeoutRemaining = (TimeoutMS * 100);
+		while (TimeoutRemaining-- && !(BusCaptured))
+		{
+			if (TWCR & (1 << TWINT))
+			{
+				switch (TWSR & TW_STATUS_MASK)
+				{
+					case TW_START:
+					case TW_REP_START:
+						BusCaptured = true;
+						break;
+					case TW_MT_ARB_LOST:
+						TWCR = ((1 << TWINT) | (1 << TWSTA) | (1 << TWEN));
+						continue;
+					default:
+						TWCR = (1 << TWEN);
+						return TWI_ERROR_BusFault;
+				}
+			}
+
+			_delay_us(10);
+		}
+
+		if (!(TimeoutRemaining))
+		{
+			TWCR = (1 << TWEN);
+			return TWI_ERROR_BusCaptureTimeout;
+		}
+
+		TWDR = SlaveAddress;
+		TWCR = ((1 << TWINT) | (1 << TWEN));
+
+		TimeoutRemaining = (TimeoutMS * 100);
+		while (TimeoutRemaining--)
+		{
+			if (TWCR & (1 << TWINT))
+			  break;
+
+			_delay_us(10);
+		}
+
+		if (!(TimeoutRemaining))
+		  return TWI_ERROR_SlaveResponseTimeout;
+
+		switch (TWSR & TW_STATUS_MASK)
+		{
+			case TW_MT_SLA_ACK:
+			case TW_MR_SLA_ACK:
+				return TWI_ERROR_NoError;
+			default:
+				TWCR = ((1 << TWINT) | (1 << TWSTO) | (1 << TWEN));
+				return TWI_ERROR_SlaveNotReady;
+		}
+	}
+}
+
+uint8_t TWI_ReadPacket(const uint8_t SlaveAddress,
+                       const uint8_t TimeoutMS,
+                       const uint8_t* InternalAddress,
+                       uint8_t InternalAddressLen,
+                       uint8_t* Buffer,
+                       uint8_t Length)
+{
+	uint8_t ErrorCode;
+	
+	if ((ErrorCode = TWI_WritePacket(SlaveAddress, TimeoutMS, InternalAddress, InternalAddressLen,
+	                                 NULL, 0)) != TWI_ERROR_NoError)
+	{
+		return ErrorCode;
+	}
+
+	if ((ErrorCode = TWI_StartTransmission((SlaveAddress & TWI_DEVICE_ADDRESS_MASK) | TWI_ADDRESS_READ,
+										   TimeoutMS)) == TWI_ERROR_NoError)
+	{
+		while (Length--)
+		{
+			if (!(TWI_ReceiveByte(Buffer++, (Length == 0))))
+			{
+				ErrorCode = TWI_ERROR_SlaveNAK;
+				break;
+			}
+		}
+		
+		TWI_StopTransmission();
+	}
+	
+	return ErrorCode;
+}
+
+uint8_t TWI_WritePacket(const uint8_t SlaveAddress,
+                        const uint8_t TimeoutMS,
+                        const uint8_t* InternalAddress,
+                        uint8_t InternalAddressLen,
+                        const uint8_t* Buffer,
+                        uint8_t Length)
+{
+	uint8_t ErrorCode;
+
+	if ((ErrorCode = TWI_StartTransmission((SlaveAddress & TWI_DEVICE_ADDRESS_MASK) | TWI_ADDRESS_WRITE,
+	                                       TimeoutMS)) == TWI_ERROR_NoError)
+	{
+		while (InternalAddressLen--)
+		{
+			if (!(TWI_SendByte(*(InternalAddress++))))
+			{
+				ErrorCode = TWI_ERROR_SlaveNAK;
+				break;
+			}
+		}
+
+		while (Length--)
+		{
+			if (!(TWI_SendByte(*(Buffer++))))
+			{
+				ErrorCode = TWI_ERROR_SlaveNAK;
+				break;
+			}
+		}
+		
+		TWI_StopTransmission();
+	}
+	
+	return ErrorCode;
+}