1 /* ----------------------------------------------------------------------------
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2 * ATMEL Microcontroller Software Support
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3 * ----------------------------------------------------------------------------
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4 * Copyright (c) 2008, Atmel Corporation
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6 * All rights reserved.
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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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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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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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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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33 //------------------------------------------------------------------------------
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35 //------------------------------------------------------------------------------
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39 //------------------------------------------------------------------------------
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40 // Global definitions
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41 //------------------------------------------------------------------------------
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43 // Missing AT91C_TWI_TXRDY definition.
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44 #ifndef AT91C_TWI_TXRDY
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45 #define AT91C_TWI_TXRDY AT91C_TWI_TXRDY_MASTER
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48 // Missing AT91C_TWI_TXCOMP definition.
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49 #ifndef AT91C_TWI_TXCOMP
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50 #define AT91C_TWI_TXCOMP AT91C_TWI_TXCOMP_MASTER
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53 //------------------------------------------------------------------------------
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55 //------------------------------------------------------------------------------
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57 /// Returns 1 if the TXRDY bit (ready to transmit data) is set in the given
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58 /// status register value.
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59 #define TWI_STATUS_TXRDY(status) ((status & AT91C_TWI_TXRDY) == AT91C_TWI_TXRDY)
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61 /// Returns 1 if the RXRDY bit (ready to receive data) is set in the given
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62 /// status register value.
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63 #define TWI_STATUS_RXRDY(status) ((status & AT91C_TWI_RXRDY) == AT91C_TWI_RXRDY)
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65 /// Returns 1 if the TXCOMP bit (transfer complete) is set in the given
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66 /// status register value.
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67 #define TWI_STATUS_TXCOMP(status) ((status & AT91C_TWI_TXCOMP) == AT91C_TWI_TXCOMP)
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69 //------------------------------------------------------------------------------
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71 //------------------------------------------------------------------------------
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73 extern void TWI_Configure(AT91S_TWI *pTwi, unsigned int twck, unsigned int mck);
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75 extern void TWI_Stop(AT91S_TWI *pTwi);
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77 extern void TWI_StartRead(
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79 unsigned char address,
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80 unsigned int iaddress,
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81 unsigned char isize);
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83 extern unsigned char TWI_ReadByte(AT91S_TWI *pTwi);
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85 extern void TWI_WriteByte(AT91S_TWI *pTwi, unsigned char byte);
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87 extern void TWI_StartWrite(
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89 unsigned char address,
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90 unsigned int iaddress,
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91 unsigned char isize,
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92 unsigned char byte);
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94 extern unsigned char TWI_ByteReceived(AT91S_TWI *pTwi);
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96 extern unsigned char TWI_ByteSent(AT91S_TWI *pTwi);
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98 extern unsigned char TWI_TransferComplete(AT91S_TWI *pTwi);
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100 extern void TWI_EnableIt(AT91S_TWI *pTwi, unsigned int sources);
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102 extern void TWI_DisableIt(AT91S_TWI *pTwi, unsigned int sources);
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104 extern unsigned int TWI_GetStatus(AT91S_TWI *pTwi);
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106 extern unsigned int TWI_GetMaskedStatus(AT91S_TWI *pTwi);
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108 #endif //#ifndef TWI_H
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