353 lines
10 KiB
C
353 lines
10 KiB
C
#include <furi.h>
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#include <gui/gui.h>
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typedef enum { EventTypeTick, EventTypeKey, EventTypeRx } EventType;
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typedef struct {
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bool value;
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uint32_t dwt_value;
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} RxEvent;
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typedef struct {
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union {
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InputEvent input;
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RxEvent rx;
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} value;
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EventType type;
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} AppEvent;
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typedef struct {
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uint32_t freq_khz;
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bool on;
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uint8_t customer_id;
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uint32_t em_data;
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bool dirty;
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} State;
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static void render_callback(Canvas* canvas, void* ctx) {
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State* state = (State*)acquire_mutex((ValueMutex*)ctx, 25);
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canvas_clear(canvas);
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canvas_set_color(canvas, ColorBlack);
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canvas_set_font(canvas, FontPrimary);
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canvas_draw_str(canvas, 2, 12, "LF RFID");
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canvas_draw_str(canvas, 2, 24, state->on ? "Reading" : "Emulating");
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char buf[14];
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sprintf(buf, "%d kHz", (int)state->freq_khz);
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canvas_draw_str(canvas, 2, 36, buf);
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sprintf(buf, "%02d:%010ld", state->customer_id, state->em_data);
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canvas_draw_str(canvas, 2, 45, buf);
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release_mutex((ValueMutex*)ctx, state);
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}
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static void input_callback(InputEvent* input_event, void* ctx) {
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osMessageQueueId_t event_queue = ctx;
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AppEvent event;
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event.type = EventTypeKey;
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event.value.input = *input_event;
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osMessageQueuePut(event_queue, &event, 0, 0);
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}
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extern TIM_HandleTypeDef TIM_C;
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void em4100_emulation(uint8_t* data, GpioPin* pin);
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void prepare_data(uint32_t ID, uint32_t VENDOR, uint8_t* data);
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GpioPin debug_0 = {.pin = GPIO_PIN_2, .port = GPIOB};
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GpioPin debug_1 = {.pin = GPIO_PIN_3, .port = GPIOC};
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extern COMP_HandleTypeDef hcomp1;
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void comparator_trigger_callback(void* hcomp, void* comp_ctx) {
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if((COMP_HandleTypeDef*)hcomp != &hcomp1) return;
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// gpio_write(&debug_0, true);
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osMessageQueueId_t event_queue = comp_ctx;
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AppEvent event;
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event.type = EventTypeRx;
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event.value.rx.value = (HAL_COMP_GetOutputLevel(hcomp) == COMP_OUTPUT_LEVEL_HIGH);
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event.value.rx.dwt_value = DWT->CYCCNT;
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osMessageQueuePut(event_queue, &event, 0, 0);
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// gpio_write(&debug_0, false);
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}
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const uint8_t ROW_SIZE = 4;
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const uint8_t LINE_SIZE = 10;
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static bool even_check(uint8_t* buf) {
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uint8_t col_parity_sum[ROW_SIZE];
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for(uint8_t col = 0; col < ROW_SIZE; col++) {
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col_parity_sum[col] = 0;
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}
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// line parity
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for(uint8_t line = 0; line < LINE_SIZE; line++) {
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printf("%d: ", line);
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uint8_t parity_sum = 0;
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for(uint8_t col = 0; col < ROW_SIZE; col++) {
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parity_sum += buf[line * (ROW_SIZE + 1) + col];
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col_parity_sum[col] += buf[line * (ROW_SIZE + 1) + col];
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printf("%d ", buf[line * (ROW_SIZE + 1) + col]);
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}
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if((1 & parity_sum) != buf[line * (ROW_SIZE + 1) + ROW_SIZE]) {
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printf(
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"line parity fail at %d (%d : %d)\n",
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line,
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parity_sum,
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buf[line * (ROW_SIZE + 1) + ROW_SIZE]);
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return false;
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}
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printf("\n");
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}
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for(uint8_t col = 0; col < ROW_SIZE; col++) {
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if((1 & col_parity_sum[col]) != buf[LINE_SIZE * (ROW_SIZE + 1) + col]) {
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printf(
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"col parity fail at %d (%d : %d)\n",
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col,
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col_parity_sum[col],
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buf[LINE_SIZE * (ROW_SIZE + 1) + col]);
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return false;
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}
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}
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return true;
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}
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static void extract_data(uint8_t* buf, uint8_t* customer, uint32_t* em_data) {
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uint32_t data = 0;
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uint8_t offset = 0;
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printf("customer: ");
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for(uint8_t line = 0; line < 2; line++) {
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for(uint8_t col = 0; col < ROW_SIZE; col++) {
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uint32_t bit = buf[line * (ROW_SIZE + 1) + col];
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data |= bit << (7 - offset);
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printf("%d ", bit);
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offset++;
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}
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}
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printf("\n");
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*customer = data;
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data = 0;
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offset = 0;
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printf("data: ");
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for(uint8_t line = 2; line < LINE_SIZE; line++) {
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for(uint8_t col = 0; col < ROW_SIZE; col++) {
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uint32_t bit = buf[line * (ROW_SIZE + 1) + col];
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data |= bit << (31 - offset);
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printf("%d ", bit);
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offset++;
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}
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}
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printf("\n");
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*em_data = data;
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}
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void lf_rfid_workaround(void* p) {
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osMessageQueueId_t event_queue = osMessageQueueNew(1, sizeof(AppEvent), NULL);
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// create pin
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GpioPin pull_pin = {.pin = RFID_PULL_Pin, .port = RFID_PULL_GPIO_Port};
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// TODO open record
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GpioPin* pull_pin_record = &pull_pin;
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gpio_init(pull_pin_record, GpioModeOutputPushPull);
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gpio_init(&debug_0, GpioModeOutputPushPull);
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gpio_init(&debug_1, GpioModeOutputPushPull);
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// pulldown iBtn pin to prevent interference from ibutton
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gpio_init((GpioPin*)&ibutton_gpio, GpioModeOutputOpenDrain);
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gpio_write((GpioPin*)&ibutton_gpio, false);
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// init ctx
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void* comp_ctx = (void*)event_queue;
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// start comp
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HAL_COMP_Start(&hcomp1);
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uint8_t emulation_data[64];
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State _state;
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_state.freq_khz = 125;
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_state.on = false;
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_state.customer_id = 01;
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_state.em_data = 4378151;
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_state.dirty = true;
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ValueMutex state_mutex;
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if(!init_mutex(&state_mutex, &_state, sizeof(State))) {
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printf("cannot create mutex\n");
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furiac_exit(NULL);
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}
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Widget* widget = widget_alloc();
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widget_draw_callback_set(widget, render_callback, &state_mutex);
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widget_input_callback_set(widget, input_callback, event_queue);
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// Open GUI and register widget
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Gui* gui = furi_record_open("gui");
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gui_add_widget(gui, widget, GuiLayerFullscreen);
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AppEvent event;
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uint32_t prev_dwt;
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int8_t symbol = -1; // init state
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bool center = false;
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size_t symbol_cnt = 0;
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GpioPin* led_record = (GpioPin*)&led_gpio[1];
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gpio_init(led_record, GpioModeOutputOpenDrain);
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uint8_t buf[64];
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for(size_t i = 0; i < 64; i++) {
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buf[i] = 0;
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}
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while(1) {
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osStatus_t event_status = osMessageQueueGet(event_queue, &event, NULL, 100);
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if(event.type == EventTypeRx && event_status == osOK) {
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uint32_t dt = (event.value.rx.dwt_value - prev_dwt) / (SystemCoreClock / 1000000.0f);
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prev_dwt = event.value.rx.dwt_value;
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if(dt > 384) {
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// change symbol 0->1 or 1->0
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symbol = event.value.rx.value;
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center = true;
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} else {
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// same symbol as prev or center
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center = !center;
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}
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/*
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gpio_write(&debug_1, true);
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delay_us(center ? 10 : 30);
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gpio_write(&debug_1, false);
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*/
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if(center && symbol != -1) {
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/*
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gpio_write(&debug_0, true);
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delay_us(symbol ? 10 : 30);
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gpio_write(&debug_0, false);
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*/
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buf[symbol_cnt] = symbol;
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symbol_cnt++;
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}
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// check preamble
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if(symbol_cnt <= 9 && symbol == 0) {
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symbol_cnt = 0;
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symbol = -1;
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}
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// check stop bit
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if(symbol_cnt == 64 && symbol == 1) {
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symbol_cnt = 0;
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symbol = -1;
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}
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if(symbol_cnt == 64) {
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if(even_check(&buf[9])) {
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State* state = (State*)acquire_mutex_block(&state_mutex);
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extract_data(&buf[9], &state->customer_id, &state->em_data);
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printf("customer: %02d, data: %010lu\n", state->customer_id, state->em_data);
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release_mutex(&state_mutex, state);
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gpio_write(led_record, false);
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osDelay(100);
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gpio_write(led_record, true);
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}
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symbol_cnt = 0;
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}
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} else {
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State* state = (State*)acquire_mutex_block(&state_mutex);
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if(event_status == osOK) {
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if(event.type == EventTypeKey) {
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// press events
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if(event.value.input.state && event.value.input.input == InputBack) {
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hal_pwmn_stop(&TIM_C, TIM_CHANNEL_1); // TODO: move to furiac_onexit
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gpio_init(pull_pin_record, GpioModeInput);
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gpio_init((GpioPin*)&ibutton_gpio, GpioModeInput);
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// TODO remove all widgets create by app
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widget_enabled_set(widget, false);
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furiac_exit(NULL);
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}
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if(event.value.input.state && event.value.input.input == InputUp) {
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state->dirty = true;
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state->freq_khz += 10;
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}
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if(event.value.input.state && event.value.input.input == InputDown) {
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state->dirty = true;
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state->freq_khz -= 10;
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}
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if(event.value.input.state && event.value.input.input == InputLeft) {
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}
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if(event.value.input.state && event.value.input.input == InputRight) {
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}
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if(event.value.input.state && event.value.input.input == InputOk) {
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state->dirty = true;
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state->on = !state->on;
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}
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}
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} else {
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// event timeout
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}
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if(state->dirty) {
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if(!state->on) {
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prepare_data(state->em_data, state->customer_id, emulation_data);
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}
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if(state->on) {
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gpio_write(pull_pin_record, false);
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api_interrupt_add(
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comparator_trigger_callback, InterruptTypeComparatorTrigger, comp_ctx);
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} else {
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api_interrupt_remove(comparator_trigger_callback);
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}
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hal_pwmn_set(
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state->on ? 0.5 : 0.0, (float)(state->freq_khz * 1000), &LFRFID_TIM, LFRFID_CH);
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state->dirty = false;
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}
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if(!state->on) {
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em4100_emulation(emulation_data, pull_pin_record);
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}
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// common code, for example, force update UI
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widget_update(widget);
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release_mutex(&state_mutex, state);
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}
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}
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}
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