121 lines
3.0 KiB
C
121 lines
3.0 KiB
C
#include "../wiegand.h"
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void wiegand_isr_d0(void *context)
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{
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UNUSED(context);
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uint32_t time = DWT->CYCCNT;
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bool rise = furi_hal_gpio_read(pinD0);
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data[bit_count] = 0;
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if (rise)
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{
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data_rise[bit_count] = time;
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if (bit_count < MAX_BITS)
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{
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bit_count++;
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}
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}
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else
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{
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data_fall[bit_count] = time;
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}
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}
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void wiegand_isr_d1(void *context)
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{
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UNUSED(context);
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uint32_t time = DWT->CYCCNT;
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bool rise = furi_hal_gpio_read(pinD1);
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data[bit_count] = 1;
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if (rise)
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{
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data_rise[bit_count] = time;
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if (bit_count < MAX_BITS)
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{
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bit_count++;
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}
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}
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else
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{
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data_fall[bit_count] = time;
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}
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}
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void wiegand_start_read(void *context)
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{
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App *app = context;
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data_saved = false;
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bit_count = 0;
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furi_hal_gpio_init_simple(pinD0, GpioModeInterruptRiseFall);
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furi_hal_gpio_init_simple(pinD1, GpioModeInterruptRiseFall);
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furi_hal_gpio_add_int_callback(pinD0, wiegand_isr_d0, NULL);
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furi_hal_gpio_add_int_callback(pinD1, wiegand_isr_d1, NULL);
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furi_timer_start(app->timer, 100);
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}
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void wiegand_stop_read(void *context)
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{
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App *app = context;
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furi_hal_gpio_remove_int_callback(pinD0);
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furi_hal_gpio_remove_int_callback(pinD1);
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furi_hal_gpio_init_simple(pinD0, GpioModeAnalog);
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furi_hal_gpio_init_simple(pinD1, GpioModeAnalog);
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furi_timer_stop(app->timer);
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}
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void wiegand_timer_callback(void *context)
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{
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App *app = context;
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uint32_t duration = DWT->CYCCNT;
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const uint32_t one_millisecond = 64000;
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if (bit_count == 0)
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{
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return;
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}
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duration -= data_fall[bit_count - 1];
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FURI_CRITICAL_ENTER();
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if (duration > 25 * one_millisecond)
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{
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if (bit_count == 4 || bit_count == 8 || bit_count == 24 || bit_count == 26 ||
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bit_count == 32 || bit_count == 34 || bit_count == 35 || bit_count == 36 ||
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bit_count == 37 || bit_count == 40 || bit_count == 48)
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{
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wiegand_stop_read(app);
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scene_manager_next_scene(app->scene_manager, WiegandDataScene);
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}
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else
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{
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// No data, clear
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bit_count = 0;
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}
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}
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FURI_CRITICAL_EXIT();
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}
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void wiegand_read_scene_on_enter(void *context)
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{
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App *app = context;
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widget_reset(app->widget);
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widget_add_string_element(app->widget, 0, 0, AlignLeft, AlignTop, FontPrimary, "Read Wiegand");
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widget_add_string_element(
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app->widget, 0, 25, AlignLeft, AlignTop, FontSecondary, "Waiting for signal...");
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widget_add_string_element(
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app->widget, 0, 45, AlignLeft, AlignTop, FontSecondary, "D0/Green/A4");
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widget_add_string_element(
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app->widget, 0, 53, AlignLeft, AlignTop, FontSecondary, "D1/White/A7");
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wiegand_start_read(app);
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view_dispatcher_switch_to_view(app->view_dispatcher, WiegandWidgetView);
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}
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void wiegand_read_scene_on_exit(void *context)
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{
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App *app = context;
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wiegand_stop_read(app);
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}
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