1 /*!
2 \file gd32e10x_exti.c
3 \brief EXTI driver
4
5 \version 2017-12-26, V1.0.0, firmware for GD32E10x
6 \version 2020-09-30, V1.1.0, firmware for GD32E10x
7 \version 2020-12-31, V1.2.0, firmware for GD32E10x
8 \version 2022-06-30, V1.3.0, firmware for GD32E10x
9 */
10
11 /*
12 Copyright (c) 2022, GigaDevice Semiconductor Inc.
13
14 Redistribution and use in source and binary forms, with or without modification,
15 are permitted provided that the following conditions are met:
16
17 1. Redistributions of source code must retain the above copyright notice, this
18 list of conditions and the following disclaimer.
19 2. Redistributions in binary form must reproduce the above copyright notice,
20 this list of conditions and the following disclaimer in the documentation
21 and/or other materials provided with the distribution.
22 3. Neither the name of the copyright holder nor the names of its contributors
23 may be used to endorse or promote products derived from this software without
24 specific prior written permission.
25
26 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
27 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
28 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29 IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
30 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
31 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
32 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
33 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
35 OF SUCH DAMAGE.
36 */
37
38 #include "gd32e10x_exti.h"
39
40 /*!
41 \brief deinitialize the EXTI
42 \param[in] none
43 \param[out] none
44 \retval none
45 */
exti_deinit(void)46 void exti_deinit(void)
47 {
48 /* reset the value of all the EXTI registers */
49 EXTI_INTEN = (uint32_t)0x00000000U;
50 EXTI_EVEN = (uint32_t)0x00000000U;
51 EXTI_RTEN = (uint32_t)0x00000000U;
52 EXTI_FTEN = (uint32_t)0x00000000U;
53 EXTI_SWIEV = (uint32_t)0x00000000U;
54 }
55
56 /*!
57 \brief initialize the EXTI
58 \param[in] linex: EXTI line number, refer to exti_line_enum
59 only one parameter can be selected which is shown as below:
60 \arg EXTI_x (x=0..18): EXTI line x
61 \param[in] mode: interrupt or event mode, refer to exti_mode_enum
62 only one parameter can be selected which is shown as below:
63 \arg EXTI_INTERRUPT: interrupt mode
64 \arg EXTI_EVENT: event mode
65 \param[in] trig_type: interrupt trigger type, refer to exti_trig_type_enum
66 only one parameter can be selected which is shown as below:
67 \arg EXTI_TRIG_RISING: rising edge trigger
68 \arg EXTI_TRIG_FALLING: falling trigger
69 \arg EXTI_TRIG_BOTH: rising and falling trigger
70 \param[out] none
71 \retval none
72 */
exti_init(exti_line_enum linex,exti_mode_enum mode,exti_trig_type_enum trig_type)73 void exti_init(exti_line_enum linex, exti_mode_enum mode, exti_trig_type_enum trig_type)
74 {
75 /* reset the EXTI line x */
76 EXTI_INTEN &= ~(uint32_t)linex;
77 EXTI_EVEN &= ~(uint32_t)linex;
78 EXTI_RTEN &= ~(uint32_t)linex;
79 EXTI_FTEN &= ~(uint32_t)linex;
80
81 /* set the EXTI mode and enable the interrupts or events from EXTI line x */
82 switch(mode){
83 case EXTI_INTERRUPT:
84 EXTI_INTEN |= (uint32_t)linex;
85 break;
86 case EXTI_EVENT:
87 EXTI_EVEN |= (uint32_t)linex;
88 break;
89 default:
90 break;
91 }
92
93 /* set the EXTI trigger type */
94 switch(trig_type){
95 case EXTI_TRIG_RISING:
96 EXTI_RTEN |= (uint32_t)linex;
97 EXTI_FTEN &= ~(uint32_t)linex;
98 break;
99 case EXTI_TRIG_FALLING:
100 EXTI_RTEN &= ~(uint32_t)linex;
101 EXTI_FTEN |= (uint32_t)linex;
102 break;
103 case EXTI_TRIG_BOTH:
104 EXTI_RTEN |= (uint32_t)linex;
105 EXTI_FTEN |= (uint32_t)linex;
106 break;
107 default:
108 break;
109 }
110 }
111
112 /*!
113 \brief enable the interrupts from EXTI line x
114 \param[in] linex: EXTI line number, refer to exti_line_enum
115 only one parameter can be selected which is shown as below:
116 \arg EXTI_x (x=0..18): EXTI line x
117 \param[out] none
118 \retval none
119 */
exti_interrupt_enable(exti_line_enum linex)120 void exti_interrupt_enable(exti_line_enum linex)
121 {
122 EXTI_INTEN |= (uint32_t)linex;
123 }
124
125 /*!
126 \brief enable the events from EXTI line x
127 \param[in] linex: EXTI line number, refer to exti_line_enum
128 only one parameter can be selected which is shown as below:
129 \arg EXTI_x (x=0..18): EXTI line x
130 \param[out] none
131 \retval none
132 */
exti_event_enable(exti_line_enum linex)133 void exti_event_enable(exti_line_enum linex)
134 {
135 EXTI_EVEN |= (uint32_t)linex;
136 }
137
138 /*!
139 \brief disable the interrupt from EXTI line x
140 \param[in] linex: EXTI line number, refer to exti_line_enum
141 only one parameter can be selected which is shown as below:
142 \arg EXTI_x (x=0..18): EXTI line x
143 \param[out] none
144 \retval none
145 */
exti_interrupt_disable(exti_line_enum linex)146 void exti_interrupt_disable(exti_line_enum linex)
147 {
148 EXTI_INTEN &= ~(uint32_t)linex;
149 }
150
151 /*!
152 \brief disable the events from EXTI line x
153 \param[in] linex: EXTI line number, refer to exti_line_enum
154 only one parameter can be selected which is shown as below:
155 \arg EXTI_x (x=0..18): EXTI line x
156 \param[out] none
157 \retval none
158 */
exti_event_disable(exti_line_enum linex)159 void exti_event_disable(exti_line_enum linex)
160 {
161 EXTI_EVEN &= ~(uint32_t)linex;
162 }
163
164 /*!
165 \brief get EXTI lines flag
166 \param[in] linex: EXTI line number, refer to exti_line_enum
167 only one parameter can be selected which is shown as below:
168 \arg EXTI_x (x=0..18): EXTI line x
169 \param[out] none
170 \retval FlagStatus: SET or RESET
171 */
exti_flag_get(exti_line_enum linex)172 FlagStatus exti_flag_get(exti_line_enum linex)
173 {
174 if(RESET != (EXTI_PD & (uint32_t)linex)){
175 return SET;
176 }else{
177 return RESET;
178 }
179 }
180
181 /*!
182 \brief clear EXTI lines pending flag
183 \param[in] linex: EXTI line number, refer to exti_line_enum
184 only one parameter can be selected which is shown as below:
185 \arg EXTI_x (x=0..18): EXTI line x
186 \param[out] none
187 \retval none
188 */
exti_flag_clear(exti_line_enum linex)189 void exti_flag_clear(exti_line_enum linex)
190 {
191 EXTI_PD = (uint32_t)linex;
192 }
193
194 /*!
195 \brief get EXTI lines interrupt flag
196 \param[in] linex: EXTI line number, refer to exti_line_enum
197 only one parameter can be selected which is shown as below:
198 \arg EXTI_x (x=0..18): EXTI line x
199 \param[out] none
200 \retval FlagStatus: SET or RESET
201 */
exti_interrupt_flag_get(exti_line_enum linex)202 FlagStatus exti_interrupt_flag_get(exti_line_enum linex)
203 {
204 uint32_t flag_left, flag_right;
205
206 flag_left = EXTI_PD & (uint32_t)linex;
207 flag_right = EXTI_INTEN & (uint32_t)linex;
208
209 if((RESET != flag_left) && (RESET != flag_right)){
210 return SET;
211 }else{
212 return RESET;
213 }
214 }
215
216 /*!
217 \brief clear EXTI lines pending flag
218 \param[in] linex: EXTI line number, refer to exti_line_enum
219 only one parameter can be selected which is shown as below:
220 \arg EXTI_x (x=0..18): EXTI line x
221 \param[out] none
222 \retval none
223 */
exti_interrupt_flag_clear(exti_line_enum linex)224 void exti_interrupt_flag_clear(exti_line_enum linex)
225 {
226 EXTI_PD = (uint32_t)linex;
227 }
228
229 /*!
230 \brief enable EXTI software interrupt event
231 \param[in] linex: EXTI line number, refer to exti_line_enum
232 only one parameter can be selected which is shown as below:
233 \arg EXTI_x (x=0..18): EXTI line x
234 \param[out] none
235 \retval none
236 */
exti_software_interrupt_enable(exti_line_enum linex)237 void exti_software_interrupt_enable(exti_line_enum linex)
238 {
239 EXTI_SWIEV |= (uint32_t)linex;
240 }
241
242 /*!
243 \brief disable EXTI software interrupt event
244 \param[in] linex: EXTI line number, refer to exti_line_enum
245 only one parameter can be selected which is shown as below:
246 \arg EXTI_x (x=0..18): EXTI line x
247 \param[out] none
248 \retval none
249 */
exti_software_interrupt_disable(exti_line_enum linex)250 void exti_software_interrupt_disable(exti_line_enum linex)
251 {
252 EXTI_SWIEV &= ~(uint32_t)linex;
253 }
254
