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
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
|
/**
* \file
*
* \brief SAM Sigma-Delta Analog-to-Digital Converter Driver
*
* Copyright (C) 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>
*/
#include "sdadc_callback.h"
struct sdadc_module *_sdadc_instances[SDADC_INST_NUM];
static void _sdadc_interrupt_handler(const uint8_t instance)
{
struct sdadc_module *module = _sdadc_instances[instance];
/* get interrupt flags and mask out enabled callbacks */
uint32_t flags = module->hw->INTFLAG.reg;
if (flags & SDADC_INTFLAG_RESRDY) {
if ((module->enabled_callback_mask & (1 << SDADC_CALLBACK_READ_BUFFER)) &&
(module->registered_callback_mask & (1 << SDADC_CALLBACK_READ_BUFFER))) {
/* clear interrupt flag */
module->hw->INTFLAG.reg = SDADC_INTFLAG_RESRDY;
/* store SDADC result in job buffer */
*(module->job_buffer++) = ((int32_t)(module->hw->RESULT.reg << 8)) >> 8;
if (--module->remaining_conversions > 0) {
if (module->software_trigger == true) {
sdadc_start_conversion(module);
}
} else {
if (module->job_status == STATUS_BUSY) {
/* job is complete. update status,disable interrupt
*and call callback */
module->job_status = STATUS_OK;
sdadc_disable_interrupt(module, SDADC_INTERRUPT_RESULT_READY);
(module->callback[SDADC_CALLBACK_READ_BUFFER])(module);
}
}
}
}
if (flags & SDADC_INTFLAG_WINMON) {
module->hw->INTFLAG.reg = SDADC_INTFLAG_WINMON;
if ((module->enabled_callback_mask & (1 << SDADC_CALLBACK_WINDOW)) &&
(module->registered_callback_mask & (1 << SDADC_CALLBACK_WINDOW))) {
(module->callback[SDADC_CALLBACK_WINDOW])(module);
}
}
if (flags & SDADC_INTFLAG_OVERRUN) {
module->hw->INTFLAG.reg = SDADC_INTFLAG_OVERRUN;
if ((module->enabled_callback_mask & (1 << SDADC_CALLBACK_ERROR)) &&
(module->registered_callback_mask & (1 << SDADC_CALLBACK_ERROR))) {
(module->callback[SDADC_CALLBACK_ERROR])(module);
}
}
}
/** Interrupt handler for the SDADC module. */
void SDADC_Handler(void)
{
_sdadc_interrupt_handler(0);
}
/**
* \brief Registers a callback.
*
* Registers a callback function which is implemented by the user.
*
* \note The callback must be enabled by for the interrupt handler to call it
* when the condition for the callback is met.
*
* \param[in] module Pointer to SDADC software instance struct
* \param[in] callback_func Pointer to callback function
* \param[in] callback_type Callback type given by an enum
*
*/
void sdadc_register_callback(
struct sdadc_module *const module,
sdadc_callback_t callback_func,
enum sdadc_callback callback_type)
{
/* Sanity check arguments */
Assert(module);
Assert(callback_func);
/* Register callback function */
module->callback[callback_type] = callback_func;
/* Set the bit corresponding to the callback_type */
module->registered_callback_mask |= (1 << callback_type);
}
/**
* \brief Unregisters a callback.
*
* Unregisters a callback function which is implemented by the user.
*
* \param[in] module Pointer to SDADC software instance struct
* \param[in] callback_type Callback type given by an enum
*
*/
void sdadc_unregister_callback(
struct sdadc_module *const module,
enum sdadc_callback callback_type)
{
/* Sanity check arguments */
Assert(module);
/* Unregister callback function */
module->callback[callback_type] = NULL;
/* Clear the bit corresponding to the callback_type */
module->registered_callback_mask &= ~(1 << callback_type);
}
/**
* \brief Read multiple samples from SDADC.
*
* Read \c samples from the SDADC into the \c buffer.
* If there is no hardware trigger defined (event action) the
* driver will retrigger the SDADC conversion whenever a conversion
* is complete until \c samples has been acquired. To avoid
* jitter in the sampling frequency using an event trigger is advised.
*
* \param[in] module_inst Pointer to the SDADC software instance struct
* \param[in] samples Number of samples to acquire
* \param[out] buffer Buffer to store the SDADC samples
*
* \return Status of the job start.
* \retval STATUS_OK The conversion job was started successfully and is
* in progress
* \retval STATUS_BUSY The SDADC is already busy with another job
*/
enum status_code sdadc_read_buffer_job(
struct sdadc_module *const module_inst,
int32_t *buffer,
uint16_t samples)
{
Assert(module_inst);
Assert(samples);
Assert(buffer);
if(module_inst->remaining_conversions != 0 ||
module_inst->job_status == STATUS_BUSY){
return STATUS_BUSY;
}
module_inst->job_status = STATUS_BUSY;
module_inst->remaining_conversions = samples;
module_inst->job_buffer = buffer;
sdadc_enable_interrupt(module_inst, SDADC_INTERRUPT_RESULT_READY);
if(module_inst->software_trigger == true) {
sdadc_start_conversion(module_inst);
}
return STATUS_OK;
}
/**
* \brief Gets the status of a job.
*
* Gets the status of an ongoing or the last job.
*
* \param [in] module_inst Pointer to the SDADC software instance struct
* \param [in] type Type of job to abort
*
* \return Status of the job.
*/
enum status_code sdadc_get_job_status(
struct sdadc_module *module_inst,
enum sdadc_job_type type)
{
/* Sanity check arguments */
Assert(module_inst);
if (type == SDADC_JOB_READ_BUFFER ) {
return module_inst->job_status;
} else {
return STATUS_ERR_INVALID_ARG;
}
}
/**
* \brief Aborts an ongoing job.
*
* Aborts an ongoing job with given type.
*
* \param [in] module_inst Pointer to the SDADC software instance struct
* \param [in] type Type of job to abort
*/
void sdadc_abort_job(
struct sdadc_module *module_inst,
enum sdadc_job_type type)
{
/* Sanity check arguments */
Assert(module_inst);
if (type == SDADC_JOB_READ_BUFFER) {
/* Disable interrupt */
sdadc_disable_interrupt(module_inst, SDADC_INTERRUPT_RESULT_READY);
/* Mark job as aborted */
module_inst->job_status = STATUS_ABORTED;
module_inst->remaining_conversions = 0;
}
}
|
