1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
/* This file has been prepared for Doxygen automatic documentation generation.*/
/*! \file *********************************************************************
*
* \brief XMEGA TWI slave driver header file.
*
* This file contains the function prototypes and enumerator definitions
* for various configuration parameters for the XMEGA TWI slave driver.
*
* The driver is not intended for size and/or speed critical code, since
* most functions are just a few lines of code, and the function call
* overhead would decrease code performance. The driver is intended for
* rapid prototyping and documentation purposes for getting started with
* the XMEGA TWI slave module.
*
* For size and/or speed critical code, it is recommended to copy the
* function contents directly into your application instead of making
* a function call.
*
* \par Application note:
* AVR1307: Using the XMEGA TWI
*
* \par Documentation
* For comprehensive code documentation, supported compilers, compiler
* settings and supported devices see readme.html
*
* \author
* Atmel Corporation: http://www.atmel.com \n
* Support email: avr@atmel.com
*
* $Revision: 1569 $
* $Date: 2008-04-22 13:03:43 +0200 (ti, 22 apr 2008) $ \n
*
* Copyright (c) 2008, Atmel Corporation All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The name of ATMEL may not be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY AND
* SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/
#ifndef TWI_DRIVER_H
#define TWI_DRIVER_H
#include "avr_compiler.h"
/* Transaction status defines.*/
#define TWIS_STATUS_READY 0
#define TWIS_STATUS_BUSY 1
/* Transaction result enumeration */
typedef enum TWIS_RESULT_enum {
TWIS_RESULT_UNKNOWN = (0x00<<0),
TWIS_RESULT_OK = (0x01<<0),
TWIS_RESULT_BUFFER_OVERFLOW = (0x02<<0),
TWIS_RESULT_TRANSMIT_COLLISION = (0x03<<0),
TWIS_RESULT_BUS_ERROR = (0x04<<0),
TWIS_RESULT_FAIL = (0x05<<0),
TWIS_RESULT_ABORTED = (0x06<<0),
} TWIS_RESULT_t;
struct TWI_Slave;
typedef void (*TWI_SlaveProc)(struct TWI_Slave*);
/*! \brief TWI slave driver struct.
*
* TWI slave struct. Holds pointer to TWI module and data processing routine,
* buffers and necessary varibles.
*/
typedef struct TWI_Slave {
TWI_t *interface; /*!< Pointer to what interface to use*/
TWI_SlaveProc Process_Data; /*!< Pointer to process data function*/
uint8_t *recvData;
uint8_t const *sendData; /*!< Data to write*/
uint8_t bytesMaxRecv;
uint8_t bytesToSend; /*!< Number of bytes to send */
uint8_t bytesReceived; /*!< Number of bytes received*/
uint8_t bytesSent; /*!< Number of bytes sent*/
uint8_t status; /*!< Status of transaction*/
uint8_t result; /*!< Result of transaction*/
bool abort; /*!< Strobe to abort*/
} TWI_Slave_t;
void TWI_SlaveInitializeDriver(TWI_Slave_t *twi,
TWI_t *module,
TWI_SlaveProc processDataFunction);
void TWI_SlaveInitializeModule(TWI_Slave_t *twi,
uint8_t address,
TWI_SLAVE_INTLVL_t intLevel,
uint8_t *recvData,
uint8_t bytesMaxRecv );
void TWI_SlaveInterruptHandler(TWI_Slave_t *twi);
void TWI_SlaveAddressMatchHandler(TWI_Slave_t *twi);
void TWI_SlaveStopHandler(TWI_Slave_t *twi);
void TWI_SlaveDataHandler(TWI_Slave_t *twi);
void TWI_SlaveReadHandler(TWI_Slave_t *twi);
void TWI_SlaveWriteHandler(TWI_Slave_t *twi);
void TWI_SlaveTransactionFinished(TWI_Slave_t *twi, uint8_t result);
/*! TWI slave interrupt service routine.
*
* Interrupt service routine for the TWI slave. Copy the interrupt vector
* into your code if needed.
*
ISR(TWIC_TWIS_vect)
{
TWI_SlaveInterruptHandler(&twiSlaveC);
}
*
*/
#endif /* TWI_DRIVER_H */
|
