diff options
Diffstat (limited to 'lib/lufa/LUFA/Drivers/Peripheral/XMEGA/TWI_XMEGA.c')
| -rw-r--r-- | lib/lufa/LUFA/Drivers/Peripheral/XMEGA/TWI_XMEGA.c | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/TWI_XMEGA.c b/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/TWI_XMEGA.c deleted file mode 100644 index 92cc643b9e..0000000000 --- a/lib/lufa/LUFA/Drivers/Peripheral/XMEGA/TWI_XMEGA.c +++ /dev/null @@ -1,185 +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_XMEGA) - -#define __INCLUDE_FROM_TWI_C -#include "../TWI.h" - -uint8_t TWI_StartTransmission(TWI_t* const TWI, - const uint8_t SlaveAddress, - const uint8_t TimeoutMS) -{ - uint16_t TimeoutRemaining; - - TWI->MASTER.ADDR = SlaveAddress; - - TimeoutRemaining = (TimeoutMS * 100); - while (TimeoutRemaining) - { - uint8_t status = TWI->MASTER.STATUS; - - if ((status & (TWI_MASTER_WIF_bm | TWI_MASTER_ARBLOST_bm)) == (TWI_MASTER_WIF_bm | TWI_MASTER_ARBLOST_bm)) - { - TWI->MASTER.ADDR = SlaveAddress; - } - else if ((status & (TWI_MASTER_WIF_bm | TWI_MASTER_RXACK_bm)) == (TWI_MASTER_WIF_bm | TWI_MASTER_RXACK_bm)) - { - TWI_StopTransmission(TWI); - return TWI_ERROR_SlaveResponseTimeout; - } - else if (status & (TWI_MASTER_WIF_bm | TWI_MASTER_RIF_bm)) - { - return TWI_ERROR_NoError; - } - - _delay_us(10); - TimeoutRemaining--; - } - - if (!(TimeoutRemaining)) { - if (TWI->MASTER.STATUS & TWI_MASTER_CLKHOLD_bm) { - TWI_StopTransmission(TWI); - } - } - - return TWI_ERROR_BusCaptureTimeout; -} - -bool TWI_SendByte(TWI_t* const TWI, - const uint8_t Byte) -{ - TWI->MASTER.DATA = Byte; - - while (!(TWI->MASTER.STATUS & TWI_MASTER_WIF_bm)); - - return (TWI->MASTER.STATUS & TWI_MASTER_WIF_bm) && !(TWI->MASTER.STATUS & TWI_MASTER_RXACK_bm); -} - -bool TWI_ReceiveByte(TWI_t* const TWI, - uint8_t* const Byte, - const bool LastByte) -{ - if ((TWI->MASTER.STATUS & (TWI_MASTER_BUSERR_bm | TWI_MASTER_ARBLOST_bm)) == (TWI_MASTER_BUSERR_bm | TWI_MASTER_ARBLOST_bm)) { - return false; - } - - while (!(TWI->MASTER.STATUS & TWI_MASTER_RIF_bm)); - - *Byte = TWI->MASTER.DATA; - - if (LastByte) - TWI->MASTER.CTRLC = TWI_MASTER_ACKACT_bm | TWI_MASTER_CMD_STOP_gc; - else - TWI->MASTER.CTRLC = TWI_MASTER_CMD_RECVTRANS_gc; - - return true; -} - -uint8_t TWI_ReadPacket(TWI_t* const TWI, - 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(TWI, (SlaveAddress & TWI_DEVICE_ADDRESS_MASK) | TWI_ADDRESS_WRITE, - TimeoutMS)) == TWI_ERROR_NoError) - { - while (InternalAddressLen--) - { - if (!(TWI_SendByte(TWI, *(InternalAddress++)))) - { - ErrorCode = TWI_ERROR_SlaveNAK; - break; - } - } - - if ((ErrorCode = TWI_StartTransmission(TWI, (SlaveAddress & TWI_DEVICE_ADDRESS_MASK) | TWI_ADDRESS_READ, - TimeoutMS)) == TWI_ERROR_NoError) - { - while (Length--) - { - if (!(TWI_ReceiveByte(TWI, Buffer++, (Length == 0)))) - { - ErrorCode = TWI_ERROR_SlaveNAK; - break; - } - } - } - - TWI_StopTransmission(TWI); - } - - return ErrorCode; -} - -uint8_t TWI_WritePacket(TWI_t* const TWI, - 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(TWI, (SlaveAddress & TWI_DEVICE_ADDRESS_MASK) | TWI_ADDRESS_WRITE, - TimeoutMS)) == TWI_ERROR_NoError) - { - while (InternalAddressLen--) - { - if (!(TWI_SendByte(TWI, *(InternalAddress++)))) - { - ErrorCode = TWI_ERROR_SlaveNAK; - break; - } - } - - while (Length--) - { - if (!(TWI_SendByte(TWI, *(Buffer++)))) - { - ErrorCode = TWI_ERROR_SlaveNAK; - break; - } - } - - TWI_StopTransmission(TWI); - } - - return ErrorCode; -} - -#endif |