]> git.scottworley.com Git - tattlekey/blob - client/tattlekey.c
aadf49dd9b58d1ad36c175128583d648c4a136c8
[tattlekey] / client / tattlekey.c
1 #include "pico/cyw43_arch.h"
2 #include "pico/stdlib.h"
3 #include "pico/util/queue.h"
4
5 #include "blink.h"
6 #include "button.h"
7 #include "config.h"
8 #include "net.h"
9
10 enum event_type { BUTTONPRESS };
11 typedef struct {
12 enum event_type type;
13 union {
14 struct {
15 uint32_t timestamp;
16 } buttonpress;
17 };
18 } event_t;
19
20 queue_t queue;
21
22 uint32_t time_s() { return time_us_64() / 1000000ul; }
23
24 static void button_pressed() {
25 /* This runs in interrupt context; don't linger. */
26 static uint64_t last_button_press_time = 0;
27 uint32_t now = time_s();
28 uint32_t time_since_last_press = now - last_button_press_time;
29 if (time_since_last_press >= config_minimum_seconds_between_button_presses) {
30 last_button_press_time = now;
31 event_t e;
32 e.type = BUTTONPRESS;
33 e.buttonpress.timestamp = now;
34 /* We don't check for failure (full queue) here because there's not much to
35 * be done about it. */
36 queue_try_add(&queue, &e);
37 }
38 }
39
40 int main() {
41 stdio_init_all();
42 if (cyw43_arch_init_with_country(CYW43_COUNTRY_USA))
43 signal_error_by_blinking();
44 cyw43_arch_enable_sta_mode();
45 signal(3, 100);
46 if (cyw43_arch_wifi_connect_timeout_ms(config_wifi_ssid, config_wifi_pass,
47 CYW43_AUTH_WPA2_AES_PSK, 90000))
48 signal_error_by_blinking();
49 signal(2, 300);
50
51 queue_init(&queue, sizeof(event_t), 99);
52
53 begin_listening_for_button_press(button_pressed);
54
55 u16_t seq = 0;
56 while (1) {
57 event_t e;
58 queue_remove_blocking(&queue, &e);
59 switch (e.type) {
60 case BUTTONPRESS:
61 seq++;
62 for (int i = 0; i < config_resend_count; i++) {
63 uint32_t now = time_s();
64 uint32_t ago = now - e.buttonpress.timestamp;
65 send_report(seq, ago);
66 signal(i == 0 ? 2 : 1, 100);
67 sleep_ms(config_resend_interval_ms);
68 }
69 break;
70 default:
71 signal_error_by_blinking();
72 }
73 }
74 }