Initial Wiegand application

2023-04-06 23:46:18 -04:00
parent e9b37d5b50
commit 25caf3752c
12 changed files with 884 additions and 0 deletions
--- a/gpio/wiegand/scenes/wiegand_read.c
+++ b/gpio/wiegand/scenes/wiegand_read.c
@@ -0,0 +1,99 @@
+#include "..\wiegand.h"
+
+void wiegand_isr_d0(void* context) {
+    UNUSED(context);
+    uint32_t time = DWT->CYCCNT;
+    bool rise = furi_hal_gpio_read(pinD0);
+
+    data[bit_count] = 0;
+
+    if(rise) {
+        data_rise[bit_count] = time;
+        if(bit_count < MAX_BITS) {
+            bit_count++;
+        }
+    } else {
+        data_fall[bit_count] = time;
+    }
+}
+
+void wiegand_isr_d1(void* context) {
+    UNUSED(context);
+    uint32_t time = DWT->CYCCNT;
+    bool rise = furi_hal_gpio_read(pinD1);
+
+    data[bit_count] = 1;
+
+    if(rise) {
+        data_rise[bit_count] = time;
+        if(bit_count < MAX_BITS) {
+            bit_count++;
+        }
+    } else {
+        data_fall[bit_count] = time;
+    }
+}
+
+void wiegand_start_read(void* context) {
+    App* app = context;
+    data_saved = false;
+    bit_count = 0;
+    furi_hal_gpio_init_simple(pinD0, GpioModeInterruptRiseFall);
+    furi_hal_gpio_init_simple(pinD1, GpioModeInterruptRiseFall);
+    furi_hal_gpio_add_int_callback(pinD0, wiegand_isr_d0, NULL);
+    furi_hal_gpio_add_int_callback(pinD1, wiegand_isr_d1, NULL);
+    furi_timer_start(app->timer, 100);
+}
+
+void wiegand_stop_read(void* context) {
+    App* app = context;
+    furi_hal_gpio_remove_int_callback(pinD0);
+    furi_hal_gpio_remove_int_callback(pinD1);
+    furi_hal_gpio_init_simple(pinD0, GpioModeAnalog);
+    furi_hal_gpio_init_simple(pinD1, GpioModeAnalog);
+    furi_timer_stop(app->timer);
+}
+
+void wiegand_timer_callback(void* context) {
+    App* app = context;
+    uint32_t duration = DWT->CYCCNT;
+    const uint32_t one_millisecond = 64000;
+
+    if(bit_count == 0) {
+        return;
+    }
+
+    duration -= data_fall[bit_count - 1];
+
+    FURI_CRITICAL_ENTER();
+    if(duration > 25 * one_millisecond) {
+        if(bit_count == 4 || bit_count == 8 || bit_count == 24 || bit_count == 26 ||
+           bit_count == 32 || bit_count == 34 || bit_count == 37 || bit_count == 40) {
+            wiegand_stop_read(app);
+            scene_manager_next_scene(app->scene_manager, WiegandDataScene);
+        } else {
+            // No data, clear
+            bit_count = 0;
+        }
+    }
+    FURI_CRITICAL_EXIT();
+}
+
+void wiegand_read_scene_on_enter(void* context) {
+    App* app = context;
+    widget_reset(app->widget);
+    widget_add_string_element(app->widget, 0, 0, AlignLeft, AlignTop, FontPrimary, "Read Wiegand");
+    widget_add_string_element(
+        app->widget, 0, 25, AlignLeft, AlignTop, FontSecondary, "Waiting for signal...");
+    widget_add_string_element(
+        app->widget, 0, 45, AlignLeft, AlignTop, FontSecondary, "D0/Green/A4");
+    widget_add_string_element(
+        app->widget, 0, 53, AlignLeft, AlignTop, FontSecondary, "D1/White/A7");
+    wiegand_start_read(app);
+    view_dispatcher_switch_to_view(app->view_dispatcher, WiegandWidgetView);
+}
+
+void wiegand_read_scene_on_exit(void* context) {
+    App* app = context;
+    wiegand_stop_read(app);
+}