1 /*
2 * Copyright (c) 2022 Espressif Systems (Shanghai) Co., Ltd.
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <stdio.h>
8 #include <zephyr/kernel.h>
9 #include <zephyr/device.h>
10 #include <zephyr/sys/printk.h>
11 #include <zephyr/drivers/ipm.h>
12
13 static const struct device *ipm_dev;
14 static char resp[64];
15 struct k_sem sync;
16
ipm_receive_callback(const struct device * ipmdev,void * user_data,uint32_t id,volatile void * data)17 static void ipm_receive_callback(const struct device *ipmdev, void *user_data, uint32_t id,
18 volatile void *data)
19 {
20 k_sem_give(&sync);
21 }
22
main(void)23 int main(void)
24 {
25 k_sem_init(&sync, 0, 1);
26
27 ipm_dev = DEVICE_DT_GET(DT_NODELABEL(ipm0));
28 if (!ipm_dev) {
29 printk("Failed to get IPM device.\n\r");
30 return 0;
31 }
32
33 ipm_register_callback(ipm_dev, ipm_receive_callback, NULL);
34
35 while (1) {
36 k_sem_take(&sync, K_FOREVER);
37 snprintf(resp, sizeof(resp), "APP_CPU uptime ticks %lli\n", k_uptime_ticks());
38 ipm_send(ipm_dev, -1, sizeof(resp), &resp, sizeof(resp));
39 }
40
41 return 0;
42 }
43
