client: Calculate 'ago' with a clock

[tattlekey] / client / tattlekey.c

diff --git a/client/tattlekey.c b/client/tattlekey.c
index 910f6963b15ba10a647a2d42c1242398bb8d0d0d..b37773c490bfebc8409896f477531abbf285a501 100644 (file)
--- a/client/tattlekey.c
+++ b/client/tattlekey.c
@@ -1,22 +1,55 @@
-/**
- * Copyright (c) 2022 Raspberry Pi (Trading) Ltd.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
 #include "pico/cyw43_arch.h"
 #include "pico/stdlib.h"
+#include "pico/util/queue.h"
+
+#include "blink.h"
+#include "button.h"
+#include "config.h"
+#include "net.h"
+
+queue_t queue;
+
+uint32_t time_s() { return time_us_64() / 1000000ul; }
+
+static void button_pressed() {
+  /* This runs in interrupt context; don't linger.  */
+  static uint64_t last_button_press_time = 0;
+  uint32_t now = time_s();
+  uint32_t time_since_last_press = now - last_button_press_time;
+  if (time_since_last_press >= minimum_seconds_between_button_presses) {
+    last_button_press_time = now;
+    /* We don't check for failure (full queue) here because there's not much to
+     * be done about it. */
+    queue_try_add(&queue, &now);
+  }
+}
 
 int main() {
   stdio_init_all();
-  if (cyw43_arch_init()) {
-    printf("Wi-Fi init failed");
-    return -1;
-  }
-  while (true) {
-    cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, 1);
-    sleep_ms(250);
-    cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, 0);
-    sleep_ms(250);
+  if (cyw43_arch_init_with_country(CYW43_COUNTRY_USA))
+    signal_error_by_blinking();
+  cyw43_arch_enable_sta_mode();
+  signal(3, 100);
+  if (cyw43_arch_wifi_connect_timeout_ms(wifi_ssid, wifi_pass,
+                                         CYW43_AUTH_WPA2_AES_PSK, 90000))
+    signal_error_by_blinking();
+  signal(2, 300);
+
+  queue_init(&queue, sizeof(uint32_t), 99);
+
+  begin_listening_for_button_press(button_pressed);
+
+  u16_t seq = 0;
+  while (1) {
+    uint32_t t;
+    queue_remove_blocking(&queue, &t);
+    seq++;
+    for (int i = 0; i < resend_count; i++) {
+      uint32_t now = time_s();
+      uint32_t ago = now - t;
+      send_report(seq, ago);
+      signal(i == 0 ? 2 : 1, 100);
+      sleep_ms(resend_interval_ms);
+    }
   }
 }