1 /*
2 * Copyright (c) 2022 - 2024, Nordic Semiconductor ASA
3 * All rights reserved.
4 *
5 * SPDX-License-Identifier: BSD-3-Clause
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice, this
11 * list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the copyright holder nor the names of its
18 * contributors may be used to endorse or promote products derived from this
19 * software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include <nrfx_example.h>
35 #include <nrfx_egu.h>
36
37 #define NRFX_LOG_MODULE EXAMPLE
38 #define NRFX_EXAMPLE_CONFIG_LOG_ENABLED 1
39 #define NRFX_EXAMPLE_CONFIG_LOG_LEVEL 3
40 #include <nrfx_log.h>
41
42 /**
43 * @defgroup nrfx_egu_example Basic EGU example
44 * @{
45 * @ingroup nrfx_egu_examples
46 *
47 * @brief Example showing basic functionality of nrfx_egu driver.
48 *
49 * @details Application initializes nrfx_egu driver instance and triggers
50 * three subsequent EGU channels. Then @ref egu_handler() is executed once
51 * for each triggered channel with relevant log message.
52 */
53
54 /** @brief Symbol specifying EGU instance to use. */
55 #define EGU_INST_IDX 0
56
57 /**
58 * @brief Function for handling EGU driver events.
59 *
60 * @param[in] event_idx Index of the event that generated the interrupt.
61 * @param[in] p_context Context passed to the event handler. Set on initialization.
62 */
egu_handler(uint8_t event_idx,void * p_context)63 static void egu_handler(uint8_t event_idx, void * p_context)
64 {
65 char * p_msg = p_context;
66 NRFX_LOG_INFO("EGU handler triggered on channel: %u. "
67 "Context passed to the handler: >%s<",
68 event_idx, p_msg);
69 }
70
71 /**
72 * @brief Function for application main entry.
73 *
74 * @return Nothing.
75 */
main(void)76 int main(void)
77 {
78 nrfx_err_t status;
79 (void)status;
80
81 #if defined(__ZEPHYR__)
82 IRQ_CONNECT(NRFX_IRQ_NUMBER_GET(NRF_EGU_INST_GET(EGU_INST_IDX)), IRQ_PRIO_LOWEST,
83 NRFX_EGU_INST_HANDLER_GET(EGU_INST_IDX), 0, 0);
84 #endif
85
86 NRFX_EXAMPLE_LOG_INIT();
87
88 NRFX_LOG_INFO("Starting nrfx_egu example");
89 NRFX_EXAMPLE_LOG_PROCESS();
90
91 nrfx_egu_t egu_inst = NRFX_EGU_INSTANCE(EGU_INST_IDX);
92 void * p_context = "Some context";
93 status = nrfx_egu_init(&egu_inst, NRFX_EGU_DEFAULT_CONFIG_IRQ_PRIORITY, egu_handler, p_context);
94 NRFX_ASSERT(status == NRFX_SUCCESS);
95
96 uint32_t ch0_idx = 0;
97 uint32_t ch1_idx = 1;
98 uint32_t ch2_idx = 2;
99
100 uint32_t channels_to_trigger = (1 << ch0_idx) | (1 << ch1_idx) | (1 << ch2_idx);
101 nrfx_egu_int_enable(&egu_inst, channels_to_trigger);
102
103 nrfx_egu_trigger(&egu_inst, ch0_idx);
104 nrfx_egu_trigger(&egu_inst, ch1_idx);
105 nrfx_egu_trigger(&egu_inst, ch2_idx);
106
107 while (1)
108 {
109 NRFX_EXAMPLE_LOG_PROCESS();
110 }
111 }
112
113 /** @} */
114
