GPIO Badge v1.0

README.md

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+#gpio_badge
+This is an app for the [GPIO Diagnostics Card](https://tindie.com/stores/MakeItHackin) by MakeItHackin.
+
+## Instructions
+Left/Right buttons to change speed.
+Back button to exit.

application.fam

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+App(
+    appid="gpio_badge",
+    name="GPIO Badge",
+    apptype=FlipperAppType.EXTERNAL,
+    entry_point="gpio_diag_lights_app",
+    requires=["gui", "subghz"],
+    stack_size=2 * 1024,
+    fap_icon="gpio_badge.png",
+    fap_category="Utilities",
+)

gpio_badge.c

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+#include <furi.h>
+#include <gui/gui.h>
+
+const GpioPin* const pin_leds[] = {
+    &gpio_ext_pa7,
+    &gpio_ext_pa6,
+    &gpio_ext_pa4,
+    &gpio_ext_pb3,
+    &gpio_ext_pb2,
+    &gpio_ext_pc3,
+    &gpio_swclk,
+    &gpio_swdio,
+    &gpio_usart_tx,
+    &gpio_usart_rx,
+    &gpio_ext_pc1,
+    &gpio_ext_pc0,
+    &gpio_ibutton,
+};
+
+uint32_t speed = 80;
+
+const GpioPin* const pin_back = &gpio_button_back;
+
+static void my_draw_callback(Canvas* canvas, void* context) {
+    UNUSED(context);
+    canvas_set_font(canvas, FontPrimary);
+    canvas_draw_str(canvas, 5, 8, "GPIO BADGE");
+}
+
+static void my_input_callback(InputEvent* event, void* context) {
+    UNUSED(context);
+    if(event->type == InputTypePress) {
+        uint32_t last_speed = speed;
+        if(event->key == InputKeyLeft) {
+            speed *= 0.8;
+            if(speed < 1) {
+                speed = 1;
+            }
+        } else if(event->key == InputKeyRight) {
+            speed *= 1.2;
+            if(speed < last_speed + 5) {
+                speed += 5;
+            }
+        }
+    }
+}
+
+int gpio_diag_lights_app(void* p) {
+    UNUSED(p);
+
+    Gui* gui = furi_record_open(RECORD_GUI);
+    ViewPort* view_port = view_port_alloc();
+    view_port_draw_callback_set(view_port, my_draw_callback, NULL);
+    view_port_input_callback_set(view_port, my_input_callback, NULL);
+    gui_add_view_port(gui, view_port, GuiLayerFullscreen);
+
+    for(size_t i = 0; i < COUNT_OF(pin_leds); i++) {
+        furi_hal_gpio_init_simple(pin_leds[i], GpioModeOutputPushPull);
+    }
+
+    int i = 0;
+    int d = 1;
+    do {
+        furi_hal_gpio_write(pin_leds[i], true);
+        furi_delay_ms(speed);
+        furi_hal_gpio_write(pin_leds[i], false);
+        i += d;
+        if(i == COUNT_OF(pin_leds) || i < 0) {
+            if(i < 1)
+                i++;
+            else
+                i--;
+            d = d * -1;
+        }
+
+        // Hold the back button to exit (since we only scan it when restarting loop).
+    } while(furi_hal_gpio_read(pin_back));
+
+    // Typically when a pin is no longer in use, it is set to analog mode.
+    // but we need to use open drain for the 1Wire pin.
+    for(size_t i = 0; i < COUNT_OF(pin_leds); i++) {
+        furi_hal_gpio_init_simple(pin_leds[i], GpioModeAnalog);
+    }
+    furi_hal_gpio_init_simple(&gpio_ibutton, GpioModeOutputOpenDrain);
+
+    // Remove the directions from the screen.
+    gui_remove_view_port(gui, view_port);
+    return 0;
+}