1 /*
2 * Copyright (c) 2022 Espressif Systems (Shanghai) Co., Ltd.
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6 #include <zephyr/kernel.h>
7 #include <zephyr/drivers/gpio.h>
8 #include <zephyr/sys/poweroff.h>
9 #include "esp_sleep.h"
10
11 #define WAKEUP_TIME_SEC (20)
12
13 #ifdef CONFIG_EXAMPLE_EXT1_WAKEUP
14 #define EXT_WAKEUP_PIN_1 (2)
15 #define EXT_WAKEUP_PIN_2 (4)
16 #endif
17
18 #ifdef CONFIG_EXAMPLE_GPIO_WAKEUP
19 #if !DT_NODE_HAS_STATUS(DT_ALIAS(wakeup_button), okay)
20 #error "Unsupported: wakeup-button alias is not defined"
21 #else
22 static const struct gpio_dt_spec wakeup_button = GPIO_DT_SPEC_GET(DT_ALIAS(wakeup_button), gpios);
23 #endif
24 #endif
25
main(void)26 int main(void)
27 {
28 switch (esp_sleep_get_wakeup_cause()) {
29 #ifdef CONFIG_EXAMPLE_EXT1_WAKEUP
30 case ESP_SLEEP_WAKEUP_EXT1:
31 {
32 uint64_t wakeup_pin_mask = esp_sleep_get_ext1_wakeup_status();
33
34 if (wakeup_pin_mask != 0) {
35 int pin = __builtin_ffsll(wakeup_pin_mask) - 1;
36
37 printk("Wake up from GPIO %d\n", pin);
38 } else {
39 printk("Wake up from GPIO\n");
40 }
41 break;
42 }
43 #endif /* CONFIG_EXAMPLE_EXT1_WAKEUP */
44 #ifdef CONFIG_EXAMPLE_GPIO_WAKEUP
45 case ESP_SLEEP_WAKEUP_GPIO:
46 {
47 uint64_t wakeup_pin_mask = esp_sleep_get_gpio_wakeup_status();
48
49 if (wakeup_pin_mask != 0) {
50 int pin = __builtin_ffsll(wakeup_pin_mask) - 1;
51
52 printk("Wake up from GPIO %d\n", pin);
53 } else {
54 printk("Wake up from GPIO\n");
55 }
56 break;
57 }
58 #endif /* CONFIG_EXAMPLE_GPIO_WAKEUP */
59 case ESP_SLEEP_WAKEUP_TIMER:
60 printk("Wake up from timer.\n");
61 break;
62 case ESP_SLEEP_WAKEUP_UNDEFINED:
63 default:
64 printk("Not a deep sleep reset\n");
65 }
66
67 k_busy_wait(1000000);
68
69 const int wakeup_time_sec = WAKEUP_TIME_SEC;
70
71 printk("Enabling timer wakeup, %ds\n", wakeup_time_sec);
72 esp_sleep_enable_timer_wakeup(wakeup_time_sec * 1000000);
73
74 #ifdef CONFIG_EXAMPLE_EXT1_WAKEUP
75 const int ext_wakeup_pin_1 = EXT_WAKEUP_PIN_1;
76 const uint64_t ext_wakeup_pin_1_mask = BIT64(ext_wakeup_pin_1);
77 const int ext_wakeup_pin_2 = EXT_WAKEUP_PIN_2;
78 const uint64_t ext_wakeup_pin_2_mask = BIT64(ext_wakeup_pin_2);
79
80 printk("Enabling EXT1 wakeup on pins GPIO%d, GPIO%d\n",
81 ext_wakeup_pin_1, ext_wakeup_pin_2);
82 esp_sleep_enable_ext1_wakeup(ext_wakeup_pin_1_mask | ext_wakeup_pin_2_mask,
83 ESP_EXT1_WAKEUP_ANY_HIGH);
84 #endif /* CONFIG_EXAMPLE_EXT1_WAKEUP */
85 #ifdef CONFIG_EXAMPLE_GPIO_WAKEUP
86 if (!gpio_is_ready_dt(&wakeup_button)) {
87 printk("Error: wakeup button device %s is not ready\n", wakeup_button.port->name);
88 return 0;
89 }
90
91 int ret = gpio_pin_configure_dt(&wakeup_button, GPIO_INPUT);
92
93 if (ret != 0) {
94 printk("Error %d: failed to configure %s pin %d\n",
95 ret, wakeup_button.port->name, wakeup_button.pin);
96 return 0;
97 }
98
99 esp_deep_sleep_enable_gpio_wakeup(BIT(wakeup_button.pin), ESP_GPIO_WAKEUP_GPIO_HIGH);
100 printk("Enabling GPIO wakeup on pins GPIO%d\n", wakeup_button.pin);
101 #endif /* CONFIG_EXAMPLE_GPIO_WAKEUP */
102
103 printk("Powering off\n");
104 sys_poweroff();
105
106 return 0;
107 }
108
