v0.0.29 - Feather firmware: auto-approve sign_event and always return explicit JSON-RPC errors for unhandled/oversized requests

firmware/feather_s3_tft/main/buttons.c

@@ -0,0 +1,155 @@
+#include "buttons.h"
+
+#include <stdbool.h>
+
+#include "driver/gpio.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+#define BTN_D0_GPIO 0 /* D0/BOOT, active LOW */
+#define BTN_D1_GPIO 1 /* D1, active HIGH */
+#define BTN_D2_GPIO 2 /* D2, active HIGH */
+
+#define BTN_DEBOUNCE_MS 30
+#define BTN_LONG_MS 1000
+#define BTN_POLL_MS 10
+
+static bool s_buttons_inited = false;
+
+static bool button_pressed(btn_id_t id)
+{
+    if (id == BTN_D0) {
+        return gpio_get_level(BTN_D0_GPIO) == 0;
+    }
+    if (id == BTN_D1) {
+        return gpio_get_level(BTN_D1_GPIO) == 1;
+    }
+    if (id == BTN_D2) {
+        return gpio_get_level(BTN_D2_GPIO) == 1;
+    }
+    return false;
+}
+
+static bool any_pressed(void)
+{
+    return button_pressed(BTN_D0) || button_pressed(BTN_D1) || button_pressed(BTN_D2);
+}
+
+void buttons_init(void)
+{
+    if (s_buttons_inited) {
+        return;
+    }
+
+    gpio_config_t d0_cfg = {
+        .pin_bit_mask = 1ULL << BTN_D0_GPIO,
+        .mode = GPIO_MODE_INPUT,
+        .pull_up_en = GPIO_PULLUP_ENABLE,
+        .pull_down_en = GPIO_PULLDOWN_DISABLE,
+        .intr_type = GPIO_INTR_DISABLE,
+    };
+    gpio_config(&d0_cfg);
+
+    gpio_config_t d1d2_cfg = {
+        .pin_bit_mask = (1ULL << BTN_D1_GPIO) | (1ULL << BTN_D2_GPIO),
+        .mode = GPIO_MODE_INPUT,
+        .pull_up_en = GPIO_PULLUP_DISABLE,
+        .pull_down_en = GPIO_PULLDOWN_ENABLE,
+        .intr_type = GPIO_INTR_DISABLE,
+    };
+    gpio_config(&d1d2_cfg);
+
+    s_buttons_inited = true;
+}
+
+btn_event_t buttons_poll(void)
+{
+    btn_event_t evt = {.id = BTN_NONE, .kind = BTN_EVT_NONE};
+
+    if (!s_buttons_inited) {
+        buttons_init();
+    }
+
+    if (button_pressed(BTN_D0)) {
+        evt.id = BTN_D0;
+        evt.kind = BTN_EVT_PRESS;
+        return evt;
+    }
+    if (button_pressed(BTN_D1)) {
+        evt.id = BTN_D1;
+        evt.kind = BTN_EVT_PRESS;
+        return evt;
+    }
+    if (button_pressed(BTN_D2)) {
+        evt.id = BTN_D2;
+        evt.kind = BTN_EVT_PRESS;
+        return evt;
+    }
+
+    return evt;
+}
+
+btn_event_t buttons_wait(uint32_t timeout_ms)
+{
+    btn_event_t evt = {.id = BTN_NONE, .kind = BTN_EVT_NONE};
+    uint32_t elapsed = 0;
+    const bool wait_forever = (timeout_ms == 0xFFFFFFFFu);
+
+    if (!s_buttons_inited) {
+        buttons_init();
+    }
+
+    while (any_pressed()) {
+        vTaskDelay(pdMS_TO_TICKS(BTN_POLL_MS));
+        if (!wait_forever) {
+            elapsed += BTN_POLL_MS;
+            if (elapsed >= timeout_ms) {
+                return evt;
+            }
+        }
+    }
+
+    while (wait_forever || elapsed < timeout_ms) {
+        btn_id_t id = BTN_NONE;
+
+        if (button_pressed(BTN_D0)) {
+            id = BTN_D0;
+        } else if (button_pressed(BTN_D1)) {
+            id = BTN_D1;
+        } else if (button_pressed(BTN_D2)) {
+            id = BTN_D2;
+        }
+
+        if (id != BTN_NONE) {
+            uint32_t held_ms = 0;
+
+            vTaskDelay(pdMS_TO_TICKS(BTN_DEBOUNCE_MS));
+            if (!button_pressed(id)) {
+                continue;
+            }
+
+            while (button_pressed(id)) {
+                vTaskDelay(pdMS_TO_TICKS(BTN_POLL_MS));
+                held_ms += BTN_POLL_MS;
+                if (!wait_forever) {
+                    elapsed += BTN_POLL_MS;
+                    if (elapsed >= timeout_ms) {
+                        return evt;
+                    }
+                }
+            }
+
+            vTaskDelay(pdMS_TO_TICKS(BTN_DEBOUNCE_MS));
+            evt.id = id;
+            evt.kind = (held_ms >= BTN_LONG_MS) ? BTN_EVT_LONG_PRESS : BTN_EVT_PRESS;
+            return evt;
+        }
+
+        vTaskDelay(pdMS_TO_TICKS(BTN_POLL_MS));
+        if (!wait_forever) {
+            elapsed += BTN_POLL_MS;
+        }
+    }
+
+    return evt;
+}