| Christina Quast | 637ace9 | 2014-11-28 13:28:37 +0100 | [diff] [blame] | 1 | /* ----------------------------------------------------------------------------
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| 2 | * ATMEL Microcontroller Software Support
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| 3 | * ----------------------------------------------------------------------------
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| 4 | * Copyright (c) 2009, Atmel Corporation
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| 5 | *
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| 6 | * All rights reserved.
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| 7 | *
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| 8 | * Redistribution and use in source and binary forms, with or without
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| 9 | * modification, are permitted provided that the following conditions are met:
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| 10 | *
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| 11 | * - Redistributions of source code must retain the above copyright notice,
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| 12 | * this list of conditions and the disclaimer below.
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| 13 | *
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| 14 | * Atmel's name may not be used to endorse or promote products derived from
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| 15 | * this software without specific prior written permission.
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| 16 | *
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| 17 | * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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| 19 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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| 20 | * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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| 22 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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| 23 | * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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| 24 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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| 25 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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| 26 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | * ----------------------------------------------------------------------------
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| 28 | */
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| 29 |
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| 30 | /**
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| 31 | * \file
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| 32 | *
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| 33 | * Interface for configuration the Two Wire Interface (TWI) peripheral.
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| 34 | *
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| 35 | */
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| 36 |
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| 37 | #ifndef _TWI_
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| 38 | #define _TWI_
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| 39 |
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| 40 | /*------------------------------------------------------------------------------
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| 41 | * Headers
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| 42 | *------------------------------------------------------------------------------*/
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| 43 |
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| 44 | #include "chip.h"
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| 45 |
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| 46 | #include <stdint.h>
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| 47 |
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| 48 | /*----------------------------------------------------------------------------
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| 49 | * Macros
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| 50 | *----------------------------------------------------------------------------*/
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| 51 | /* Returns 1 if the TXRDY bit (ready to transmit data) is set in the given status register value.*/
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| 52 | #define TWI_STATUS_TXRDY(status) ((status & TWI_SR_TXRDY) == TWI_SR_TXRDY)
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| 53 |
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| 54 | /* Returns 1 if the RXRDY bit (ready to receive data) is set in the given status register value.*/
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| 55 | #define TWI_STATUS_RXRDY(status) ((status & TWI_SR_RXRDY) == TWI_SR_RXRDY)
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| 56 |
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| 57 | /* Returns 1 if the TXCOMP bit (transfer complete) is set in the given status register value.*/
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| 58 | #define TWI_STATUS_TXCOMP(status) ((status & TWI_SR_TXCOMP) == TWI_SR_TXCOMP)
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| 59 |
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| 60 | #ifdef __cplusplus
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| 61 | extern "C" {
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| 62 | #endif
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| 63 |
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| 64 | /*----------------------------------------------------------------------------
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| 65 | * External function
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| 66 | *----------------------------------------------------------------------------*/
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| 67 |
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| 68 | extern void TWI_ConfigureMaster(Twi *pTwi, uint32_t twck, uint32_t mck);
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| 69 |
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| 70 | extern void TWI_ConfigureSlave(Twi *pTwi, uint8_t slaveAddress);
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| 71 |
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| 72 | extern void TWI_Stop(Twi *pTwi);
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| 73 |
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| 74 | extern void TWI_StartRead(
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| 75 | Twi *pTwi,
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| 76 | uint8_t address,
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| 77 | uint32_t iaddress,
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| 78 | uint8_t isize);
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| 79 |
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| 80 | extern uint8_t TWI_ReadByte(Twi *pTwi);
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| 81 |
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| 82 | extern void TWI_WriteByte(Twi *pTwi, uint8_t byte);
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| 83 |
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| 84 | extern void TWI_StartWrite(
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| 85 | Twi *pTwi,
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| 86 | uint8_t address,
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| 87 | uint32_t iaddress,
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| 88 | uint8_t isize,
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| 89 | uint8_t byte);
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| 90 |
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| 91 | extern uint8_t TWI_ByteReceived(Twi *pTwi);
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| 92 |
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| 93 | extern uint8_t TWI_ByteSent(Twi *pTwi);
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| 94 |
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| 95 | extern uint8_t TWI_TransferComplete(Twi *pTwi);
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| 96 |
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| 97 | extern void TWI_EnableIt(Twi *pTwi, uint32_t sources);
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| 98 |
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| 99 | extern void TWI_DisableIt(Twi *pTwi, uint32_t sources);
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| 100 |
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| 101 | extern uint32_t TWI_GetStatus(Twi *pTwi);
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| 102 |
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| 103 | extern uint32_t TWI_GetMaskedStatus(Twi *pTwi);
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| 104 |
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| 105 | extern void TWI_SendSTOPCondition(Twi *pTwi);
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| 106 |
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| 107 | #ifdef __cplusplus
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| 108 | }
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| 109 | #endif
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| 110 |
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| 111 | #endif /* #ifndef _TWI_ */
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