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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
/**
* \file
*
* \brief SAM SERCOM I2C Slave Interrupt Driver
*
* Copyright (C) 2013-2015 Atmel Corporation. All rights reserved.
*
* \asf_license_start
*
* \page License
*
* 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.
*
* 4. This software may only be redistributed and used in connection with an
* Atmel microcontroller product.
*
* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT 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.
*
* \asf_license_stop
*
*/
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
*/
#ifndef I2C_SLAVE_INTERRUPT_H_INCLUDED
#define I2C_SLAVE_INTERRUPT_H_INCLUDED
#include "i2c_slave.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* \addtogroup asfdoc_sam0_sercom_i2c_group
* @{
*
*/
/**
* \name Address Match Functionality
* @{
*/
void i2c_slave_enable_nack_on_address(
struct i2c_slave_module *const module);
void i2c_slave_disable_nack_on_address(
struct i2c_slave_module *const module);
/** @} */
/**
* \name Callbacks
* @{
*/
#if !defined(__DOXYGEN__)
void _i2c_slave_interrupt_handler(uint8_t instance);
#endif
void i2c_slave_register_callback(
struct i2c_slave_module *const module,
i2c_slave_callback_t callback,
enum i2c_slave_callback callback_type);
void i2c_slave_unregister_callback(
struct i2c_slave_module *const module,
enum i2c_slave_callback callback_type);
/**
* \brief Enables callback
*
* Enables the callback specified by the callback_type.
*
* \param[in,out] module Pointer to the software module struct
* \param[in] callback_type Callback type to enable
*/
static inline void i2c_slave_enable_callback(
struct i2c_slave_module *const module,
enum i2c_slave_callback callback_type)
{
/* Sanity check */
Assert(module);
Assert(module->hw);
/* Mark callback as enabled */
module->enabled_callback |= (1 << callback_type);
/* Enable address callback */
SercomI2cs *const i2c_hw = &(module->hw->I2CS);
if (callback_type == I2C_SLAVE_CALLBACK_READ_REQUEST ||
callback_type == I2C_SLAVE_CALLBACK_WRITE_REQUEST) {
i2c_hw->INTENSET.reg = SERCOM_I2CS_INTFLAG_AMATCH;
}
}
/**
* \brief Disables callback
*
* Disables the callback specified by the callback_type.
*
* \param[in,out] module Pointer to the software module struct
* \param[in] callback_type Callback type to disable
*/
static inline void i2c_slave_disable_callback(
struct i2c_slave_module *const module,
enum i2c_slave_callback callback_type)
{
/* Sanity check */
Assert(module);
Assert(module->hw);
/* Mark callback as disabled */
module->enabled_callback &= ~(1 << callback_type);
SercomI2cs *const i2c_hw = &(module->hw->I2CS);
if (callback_type == I2C_SLAVE_CALLBACK_READ_REQUEST ||
callback_type == I2C_SLAVE_CALLBACK_WRITE_REQUEST ||
module->status != STATUS_BUSY) {
i2c_hw->INTENCLR.reg = SERCOM_I2CS_INTFLAG_AMATCH;
}
}
/** @} */
/**
* \name Read and Write, Interrupt-Driven
* @{
*/
enum status_code i2c_slave_read_packet_job(
struct i2c_slave_module *const module,
struct i2c_slave_packet *const packet);
enum status_code i2c_slave_write_packet_job(
struct i2c_slave_module *const module,
struct i2c_slave_packet *const packet);
/**
* \brief Cancels any currently ongoing operation
*
* Terminates the running transfer operation.
*
* \param[in,out] module Pointer to software module structure
*/
static inline void i2c_slave_cancel_job(
struct i2c_slave_module *const module)
{
/* Sanity check. */
Assert(module);
Assert(module->hw);
/* Set buffer to 0. */
module->buffer_remaining = 0;
module->buffer_length = 0;
}
/**
* \brief Gets status of ongoing job
*
* Will return the status of the ongoing job, or the error that occurred
* in the last transfer operation.
* The status will be cleared when starting a new job.
*
* \param[in,out] module Pointer to software module structure
*
* \return Status of job.
* \retval STATUS_OK No error has occurred
* \retval STATUS_BUSY Transfer is in progress
* \retval STATUS_ERR_IO A collision, timeout or bus error happened in
* the last transfer
* \retval STATUS_ERR_TIMEOUT A timeout occurred
* \retval STATUS_ERR_OVERFLOW Data from master overflows receive buffer
*/
static inline enum status_code i2c_slave_get_job_status(
struct i2c_slave_module *const module)
{
/* Check sanity. */
Assert(module);
Assert(module->hw);
/* Return current status code. */
return module->status;
}
/** @} */
/** @} */
#ifdef __cplusplus
}
#endif
#endif /* I2C_SLAVE_INTERRUPT_H_INCLUDED */
|
