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
|
#ifndef I2C_EXPORT_H
#define I2C_EXPORT_H
/****************************************************
*
* Copyright Motrola 1999
*
****************************************************/
/* These are the defined return values for the I2C_do_transaction function.
* Any non-zero value indicates failure. Failure modes can be added for
* more detailed error reporting.
*/
typedef enum _i2c_status
{
I2C_SUCCESS = 0,
I2C_ERROR,
} I2C_Status;
/* These are the defined tasks for I2C_do_transaction.
* Modes for SLAVE_RCV and SLAVE_XMIT will be added.
*/
typedef enum _i2c_transaction_mode
{
I2C_MASTER_RCV = 0,
I2C_MASTER_XMIT = 1,
} I2C_TRANSACTION_MODE;
typedef enum _i2c_interrupt_mode
{
I2C_INT_DISABLE = 0,
I2C_INT_ENABLE = 1,
} I2C_INTERRUPT_MODE;
typedef enum _i2c_stop
{
I2C_NO_STOP = 0,
I2C_STOP = 1,
} I2C_STOP_MODE;
typedef enum _i2c_restart
{
I2C_NO_RESTART = 0,
I2C_RESTART = 1,
} I2C_RESTART_MODE;
/******************** App. API ********************
* The application API is for user level application
* to use the functionality provided by I2C driver.
* This is a "generic" I2C interface, it should contain
* nothing specific to the Kahlua implementation.
* Only the generic functions are exported by the library.
*
* Note: Its App.s responsibility to swap the data
* byte. In our API, we just transfer whatever
* we are given
**************************************************/
/* Initialize I2C unit with the following:
* driver's slave address
* interrupt enabled
* optional pointer to application layer print function
*
* These parameters may be added:
* desired clock rate
* digital filter frequency sampling rate
*
* This function must be called before I2C unit can be used.
*/
extern I2C_Status I2C_Initialize(
unsigned char addr, /* driver's I2C slave address */
I2C_INTERRUPT_MODE en_int, /* 1 - enable I2C interrupt
* 0 - disable I2C interrupt
*/
int (*app_print_function)(char *,...)); /* pointer to optional "printf"
* provided by application
*/
/* Perform the given I2C transaction, only MASTER_XMIT and MASTER_RCV
* are implemented. Both are only in polling mode.
*
* en_int controls interrupt/polling mode
* act is the type of transaction
* addr is the I2C address of the slave device
* len is the length of data to send or receive
* buffer is the address of the data buffer
* stop = I2C_NO_STOP, don't signal STOP at end of transaction
* I2C_STOP, signal STOP at end of transaction
* retry is the timeout retry value, currently ignored
* rsta = I2C_NO_RESTART, this is not continuation of existing transaction
* I2C_RESTART, this is a continuation of existing transaction
*/
extern I2C_Status I2C_do_transaction( I2C_INTERRUPT_MODE en_int,
I2C_TRANSACTION_MODE act,
unsigned char i2c_addr,
unsigned char data_addr,
int len,
char *buffer,
I2C_STOP_MODE stop,
int retry,
I2C_RESTART_MODE rsta);
#endif
|
