diff options
Diffstat (limited to 'lib/lufa/LUFA/Drivers/Peripheral/AVR8/TWI_AVR8.c')
| -rw-r--r-- | lib/lufa/LUFA/Drivers/Peripheral/AVR8/TWI_AVR8.c | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/lib/lufa/LUFA/Drivers/Peripheral/AVR8/TWI_AVR8.c b/lib/lufa/LUFA/Drivers/Peripheral/AVR8/TWI_AVR8.c deleted file mode 100644 index eb08687be3..0000000000 --- a/lib/lufa/LUFA/Drivers/Peripheral/AVR8/TWI_AVR8.c +++ /dev/null @@ -1,209 +0,0 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2017. - - dean [at] fourwalledcubicle [dot] com - www.lufa-lib.org -*/ - -/* - Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com) - - Permission to use, copy, modify, distribute, and sell this - software and its documentation for any purpose is hereby granted - without fee, provided that the above copyright notice appear in - all copies and that both that the copyright notice and this - permission notice and warranty disclaimer appear in supporting - documentation, and that the name of the author not be used in - advertising or publicity pertaining to distribution of the - software without specific, written prior permission. - - The author disclaims all warranties with regard to this - software, including all implied warranties of merchantability - and fitness. In no event shall the author be liable for any - special, indirect or consequential damages or any damages - whatsoever resulting from loss of use, data or profits, whether - in an action of contract, negligence or other tortious action, - arising out of or in connection with the use or performance of - this software. -*/ - -#include "../../../Common/Common.h" -#if (ARCH == ARCH_AVR8) && defined(TWCR) - -#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); - TimeoutRemaining--; - } - - 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); - TimeoutRemaining--; - } - - 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; - } - } -} - -bool TWI_SendByte(const uint8_t Byte) -{ - TWDR = Byte; - TWCR = ((1 << TWINT) | (1 << TWEN)); - while (!(TWCR & (1 << TWINT))); - - return ((TWSR & TW_STATUS_MASK) == TW_MT_DATA_ACK); -} - -bool TWI_ReceiveByte(uint8_t* const Byte, - const bool LastByte) -{ - uint8_t TWCRMask; - - if (LastByte) - TWCRMask = ((1 << TWINT) | (1 << TWEN)); - else - TWCRMask = ((1 << TWINT) | (1 << TWEN) | (1 << TWEA)); - - TWCR = TWCRMask; - while (!(TWCR & (1 << TWINT))); - *Byte = TWDR; - - uint8_t Status = (TWSR & TW_STATUS_MASK); - - return ((LastByte) ? (Status == TW_MR_DATA_NACK) : (Status == TW_MR_DATA_ACK)); -} - -uint8_t TWI_ReadPacket(const uint8_t SlaveAddress, - const uint8_t TimeoutMS, - const uint8_t* InternalAddress, - uint8_t InternalAddressLen, - uint8_t* Buffer, - uint16_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; - } - } - - 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, - uint16_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; -} - -#endif |