1 /**
2 * \file
3 *
4 * \brief SAM Temperature Sensor Driver
5 *
6 * Copyright (C) 2015 Atmel Corporation. All rights reserved.
7 *
8 * \asf_license_start
9 *
10 * \page License
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions are met:
14 *
15 * 1. Redistributions of source code must retain the above copyright notice,
16 * this list of conditions and the following disclaimer.
17 *
18 * 2. Redistributions in binary form must reproduce the above copyright notice,
19 * this list of conditions and the following disclaimer in the documentation
20 * and/or other materials provided with the distribution.
21 *
22 * 3. The name of Atmel may not be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * 4. This software may only be redistributed and used in connection with an
26 * Atmel microcontroller product.
27 *
28 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
29 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
31 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
32 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
36 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
37 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38 * POSSIBILITY OF SUCH DAMAGE.
39 *
40 * \asf_license_stop
41 *
42 */
43 /*
44 * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
45 */
46
47 #include "tsens_callback.h"
48
49 struct tsens_module *_tsens_instances;
50
51 /** Interrupt handler for the TSENS module. */
TSENS_Handler(void)52 void TSENS_Handler(void)
53 {
54 struct tsens_module *module = _tsens_instances;
55 Assert(module);
56
57 /* get interrupt flags and mask out enabled callbacks */
58 uint32_t flags = TSENS->INTFLAG.reg;
59
60 /* store TSENS result in job buffer */
61 uint32_t temp = TSENS->VALUE.reg;
62 if(temp & 0x00800000) {
63 temp |= ~TSENS_VALUE_MASK;
64 }
65 #if (ERRATA_14476)
66 *(module->value) = temp * (-1);
67 #endif
68
69 for(uint8_t i = 0; i < TSENS_CALLBACK_NUM; i++)
70 {
71 if (flags & ((uint32_t)0x01 << i)) {
72 /* Clear the INTFLAG anyway */
73 TSENS->INTFLAG.reg = (uint32_t)0x01 << i;
74
75 if(module->callback[i] != NULL) {
76 module->callback[i]((enum tsens_callback)i);
77 }
78 }
79 }
80 }
81
82 /**
83 * \brief Registers a callback.
84 *
85 * Registers a callback function which is implemented by the user.
86 *
87 * \note The callback must be enabled by for the interrupt handler to call it
88 * when the condition for the callback is met.
89 *
90 * \param[in] module Pointer to TSENS software instance struct
91 * \param[in] callback_func Pointer to callback function
92 * \param[in] callback_type Callback type given by an enum
93 *
94 */
tsens_register_callback(struct tsens_module * const module,tsens_callback_t callback_func,enum tsens_callback callback_type)95 enum status_code tsens_register_callback(
96 struct tsens_module *const module,
97 tsens_callback_t callback_func,
98 enum tsens_callback callback_type)
99 {
100 /* Sanity check arguments */
101 Assert(module);
102 Assert(callback_func);
103
104 if(callback_type > TSENS_CALLBACK_NUM) {
105 return STATUS_ERR_INVALID_ARG;
106 }
107
108 /* Register callback function */
109 module->callback[callback_type] = callback_func;
110 _tsens_instances = module;
111
112 return STATUS_OK;
113 }
114
115 /**
116 * \brief Unregisters a callback.
117 *
118 * Unregisters a callback function which is implemented by the user.
119 *
120 * \param[in] module Pointer to TSENS software instance struct
121 * \param[in] callback_type Callback type given by an enum
122 *
123 */
tsens_unregister_callback(struct tsens_module * const module,enum tsens_callback callback_type)124 enum status_code tsens_unregister_callback(
125 struct tsens_module *const module,
126 enum tsens_callback callback_type)
127 {
128 /* Sanity check arguments */
129 Assert(module);
130
131 if(callback_type > TSENS_CALLBACK_NUM) {
132 return STATUS_ERR_INVALID_ARG;
133 }
134
135 /* Register callback function */
136 module->callback[callback_type] = NULL;
137
138 return STATUS_OK;
139 }
140
141 /**
142 * \brief Read result from TSENS.
143 *
144 * \param[in] module_inst Pointer to the TSENS software instance struct
145 * \param[out] result Pointer to store the TSENS result
146 *
147 */
tsens_read_job(struct tsens_module * const module_inst,int32_t * result)148 void tsens_read_job(
149 struct tsens_module *const module_inst,
150 int32_t *result)
151 {
152 Assert(module_inst);
153 Assert(result);
154
155 module_inst->value = result;
156
157 if(!(TSENS->CTRLC.reg & TSENS_CTRLC_FREERUN)) {
158 tsens_start_conversion();
159 }
160 }
161