43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
#include <furi_hal.h>
|
|
#include <furi_hal_pwm.h>
|
|
#include <gui/gui.h>
|
|
|
|
// Pin A7 is FuriHalPwmOutputIdTim1PA7, pin A4 is FuriHalPwmOutputIdLptim2PA4.
|
|
const FuriHalPwmOutputId channel_led = FuriHalPwmOutputIdTim1PA7;
|
|
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 - BLINK PWM LED");
|
|
canvas_draw_str(canvas, 5, 22, "Connect long LED to pin");
|
|
canvas_draw_str(canvas, 5, 32, "A7. Connect short LED");
|
|
canvas_draw_str(canvas, 5, 42, "to 220 ohm resistor.");
|
|
canvas_draw_str(canvas, 5, 52, "Connect other end of");
|
|
canvas_draw_str(canvas, 5, 62, "resistor to pin GND.");
|
|
}
|
|
|
|
int gpio_blink_pwm_app(void* p) {
|
|
UNUSED(p);
|
|
|
|
// Show directions to user.
|
|
Gui* gui = furi_record_open(RECORD_GUI);
|
|
ViewPort* view_port = view_port_alloc();
|
|
view_port_draw_callback_set(view_port, my_draw_callback, NULL);
|
|
gui_add_view_port(gui, view_port, GuiLayerFullscreen);
|
|
|
|
// Start blinking LED at 1 Hz, 20% duty cycle
|
|
furi_hal_pwm_start(channel_led, 1, 20);
|
|
|
|
// Hold the back button to exit (since we only scan it when restarting loop).
|
|
while(furi_hal_gpio_read(pin_back)) {
|
|
furi_delay_ms(100);
|
|
}
|
|
|
|
// Stop blinking LED (floating input)
|
|
furi_hal_pwm_stop(channel_led);
|
|
|
|
// Remove the directions from the screen.
|
|
gui_remove_view_port(gui, view_port);
|
|
return 0;
|
|
} |