[e1eeb883] | 1 | /* ---------------------------------------------------------------------------- */ |
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| 2 | /* Atmel Microcontroller Software Support */ |
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| 3 | /* SAM Software Package License */ |
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| 4 | /* ---------------------------------------------------------------------------- */ |
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| 5 | /* Copyright (c) 2015, Atmel Corporation */ |
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| 6 | /* */ |
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| 7 | /* All rights reserved. */ |
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| 8 | /* */ |
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| 9 | /* Redistribution and use in source and binary forms, with or without */ |
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| 10 | /* modification, are permitted provided that the following condition is met: */ |
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| 11 | /* */ |
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| 12 | /* - Redistributions of source code must retain the above copyright notice, */ |
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| 13 | /* this list of conditions and the disclaimer below. */ |
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| 14 | /* */ |
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| 15 | /* Atmel's name may not be used to endorse or promote products derived from */ |
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| 16 | /* this software without specific prior written permission. */ |
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| 17 | /* */ |
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| 18 | /* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR */ |
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| 19 | /* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */ |
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| 20 | /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE */ |
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| 21 | /* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, */ |
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| 22 | /* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT */ |
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| 23 | /* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, */ |
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| 24 | /* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF */ |
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| 25 | /* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING */ |
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| 26 | /* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, */ |
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| 27 | /* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ |
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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 |
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| 52 | status register value.*/ |
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| 53 | #define TWI_STATUS_TXRDY(status) ((status & TWIHS_SR_TXRDY) == TWIHS_SR_TXRDY) |
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| 54 | |
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| 55 | /* Returns 1 if the RXRDY bit (ready to receive data) is set in the given |
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| 56 | status register value.*/ |
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| 57 | #define TWI_STATUS_RXRDY(status) ((status & TWIHS_SR_RXRDY) == TWIHS_SR_RXRDY) |
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| 58 | |
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| 59 | /* Returns 1 if the TXCOMP bit (transfer complete) is set in the given |
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| 60 | status register value.*/ |
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| 61 | #define TWI_STATUS_TXCOMP(status) ((status & TWIHS_SR_TXCOMP) == TWIHS_SR_TXCOMP) |
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| 62 | |
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| 63 | #ifdef __cplusplus |
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| 64 | extern "C" { |
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| 65 | #endif |
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| 66 | |
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| 67 | /*---------------------------------------------------------------------------- |
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| 68 | * External function |
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| 69 | *----------------------------------------------------------------------------*/ |
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| 70 | |
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| 71 | extern void TWI_ConfigureMaster(Twihs *pTwi, uint32_t twck, uint32_t mck); |
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| 72 | |
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| 73 | extern void TWI_ConfigureSlave(Twihs *pTwi, uint8_t slaveAddress); |
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| 74 | |
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| 75 | extern void TWI_Stop(Twihs *pTwi); |
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| 76 | |
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| 77 | extern void TWI_StartRead( |
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| 78 | Twihs *pTwi, |
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| 79 | uint8_t address, |
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| 80 | uint32_t iaddress, |
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| 81 | uint8_t isize); |
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| 82 | |
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| 83 | extern uint8_t TWI_ReadByte(Twihs *pTwi); |
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| 84 | |
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| 85 | extern void TWI_WriteByte(Twihs *pTwi, uint8_t byte); |
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| 86 | |
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| 87 | extern void TWI_StartWrite( |
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| 88 | Twihs *pTwi, |
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| 89 | uint8_t address, |
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| 90 | uint32_t iaddress, |
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| 91 | uint8_t isize, |
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| 92 | uint8_t byte); |
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| 93 | |
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| 94 | extern uint8_t TWI_ByteReceived(Twihs *pTwi); |
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| 95 | |
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| 96 | extern uint8_t TWI_ByteSent(Twihs *pTwi); |
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| 97 | |
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| 98 | extern uint8_t TWI_TransferComplete(Twihs *pTwi); |
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| 99 | |
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| 100 | extern void TWI_EnableIt(Twihs *pTwi, uint32_t sources); |
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| 101 | |
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| 102 | extern void TWI_DisableIt(Twihs *pTwi, uint32_t sources); |
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| 103 | |
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| 104 | extern uint32_t TWI_GetStatus(Twihs *pTwi); |
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| 105 | |
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| 106 | extern uint32_t TWI_GetMaskedStatus(Twihs *pTwi); |
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| 107 | |
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| 108 | extern void TWI_SendSTOPCondition(Twihs *pTwi); |
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| 109 | |
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| 110 | #ifdef __cplusplus |
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| 111 | } |
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| 112 | #endif |
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| 113 | |
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| 114 | #endif /* #ifndef _TWI_ */ |
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