47 lines
1.7 KiB
C
47 lines
1.7 KiB
C
#include <furi.h>
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#include <gui/gui.h>
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// For list of pins see \firmware\targets\f18\furi_hal\furi_hal_resources.c
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const GpioPin* const pin_led = &gpio_ext_pa7;
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const GpioPin* const pin_back = &gpio_button_back;
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static void my_draw_callback(Canvas* canvas, void* context) {
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UNUSED(context);
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canvas_set_font(canvas, FontPrimary);
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canvas_draw_str(canvas, 5, 8, "GPIO - BLINK LED DEMO");
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canvas_draw_str(canvas, 5, 22, "Connect long LED to pin");
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canvas_draw_str(canvas, 5, 32, "A7. Connect short LED");
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canvas_draw_str(canvas, 5, 42, "to 220 ohm resistor.");
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canvas_draw_str(canvas, 5, 52, "Connect other end of");
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canvas_draw_str(canvas, 5, 62, "resistor to pin GND.");
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}
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int gpio_blink_app(void* p) {
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UNUSED(p);
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// Show directions to user.
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Gui* gui = furi_record_open(RECORD_GUI);
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ViewPort* view_port = view_port_alloc();
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view_port_draw_callback_set(view_port, my_draw_callback, NULL);
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gui_add_view_port(gui, view_port, GuiLayerFullscreen);
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// Initialize the LED pin as output.
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// GpioModeOutputPushPull means true = +3.3V, false = 0V.
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// GpioModeOutputOpenDrain means true = floating, false = 0V.
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furi_hal_gpio_init_simple(pin_led, GpioModeOutputOpenDrain);
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do {
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furi_hal_gpio_write(pin_led, true);
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furi_delay_ms(500);
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furi_hal_gpio_write(pin_led, false);
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furi_delay_ms(500);
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// Hold the back button to exit (since we only scan it when restarting loop).
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} while(furi_hal_gpio_read(pin_back));
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// Typically when a pin is no longer in use, it is set to analog mode.
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furi_hal_gpio_init_simple(pin_led, GpioModeAnalog);
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// Remove the directions from the screen.
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gui_remove_view_port(gui, view_port);
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return 0;
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} |