1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
#include "heartbeat.hpp"
static int led_pin;
#if (USE_FREERTOS != 1)
static repeating_timer_t heartbeat_timer;
static bool heartbeat_callback(repeating_timer_t *rt) {
static volatile uint8_t led_counter = 0;
const bool sequence[] = {true, false, true, false, false};
const uint8_t sequence_length = 5;
bool led_status = sequence[led_counter];
gpio_put(led_pin, led_status);
led_counter++;
led_counter %= sequence_length;
return true;
}
#endif
void heartbeat_initialize(int gpio) {
led_pin = gpio;
gpio_init(led_pin);
gpio_set_dir(led_pin, GPIO_OUT);
gpio_put(led_pin, 0);
#if (USE_FREERTOS != 1)
add_repeating_timer_us(-1000000 / HEART_RATE_HZ, &heartbeat_callback, NULL, &heartbeat_timer);
#endif
}
#if (USE_FREERTOS == 1)
void heartbeat_task( void *pvParameters ) {
TickType_t xLastWakeTime;
const TickType_t xFrequency = pdMS_TO_TICKS(1000 / HEART_RATE_HZ);
static volatile uint8_t led_counter = 0;
const bool sequence[] = {true, false, true, false, false};
const uint8_t sequence_length = 5;
xLastWakeTime = xTaskGetTickCount();
while (1) {
vTaskDelayUntil(&xLastWakeTime, xFrequency);
bool led_status = sequence[led_counter];
gpio_put(PICO_DEFAULT_LED_PIN, led_status);
led_counter++;
led_counter %= sequence_length;
}
}
#endif
|
