Low frequency RFID app [Read stage] (#385)

* App Lfrfid: init
* HAL-resources: add external gpios
* HAL-pwm: fix frequency calculation
* App LFRFID: generic manchester decoder
* App LFRFID: em-marine decoder
* App iButton: fix dwt timing acquire
* App LFRFID: rfid reader
* App LFRFID: temporary read keys on read scene
* App LFRFID: remove atomic bool init.
* App LFRFID: add *.c to build
* App LFRFID: unstable HID decoder
* App LFRFID: HID-26 reading
* HAL OS: disable sleep
* App LFRFID: HID-26 reader: remove debug
* App LFRFID: static data decoder-analyzer
* App LFRFID: very raw Indala decoder
* App LFRFID: multiprotocol reader
* App LFRFID: more reliable HID decoder
* App LFRFID: syntax fix
* App LFRFID: simple read scene
* Gui: force redraw on screen stream connect
* HAL-OS: allow sleep
* App LFRFID: notify api, tune view, tune scene
* App LFRFID: simple rfid emulator
* App LFRFID: more scenes, more reliable EM decoder.
* App LFRFID: format fix
* App LFRFID: warning fix
* Api-hal-resources: add rfid pins, rename external pins
* App LFRFID: remove unused emulator
* App LFRFID: use new gpio hal api
* App accessor: use new ext gpio name
* App LFRFID: remove unused emulator
* App LFRFID: remove debug gpio
* Api-hal-resources: alternate functions init
* Api-hal-rfid: new api
* Api-hal-ibutton: new api
* Api-hal: new headers
* App LFRFID: use new api in reader subroutines
* App LFRFID: use new api in emulator subroutines
* App LFRFID: remove old app
* App LFRFID, App iButton: fix memleak
* Api-hal-rfid: comments
* App LFRFID: pulse joiner helper, it combines pulses of different polarity into one pulse suitable for a timer
* App LFRFID: pulse joiner, now can accept only ne pulse
* App LFRFID: pulse joiner, fixes
* App LFRFID: EM encoder and emulation
* App LFRFID: format fixes
* App LFRFID: emmarine encoder cleanup
* App LFRFID: HID Encoder blank
* App LFRFID: Indala Encoder blank

applications/lf-rfid/view/lf-rfid-view-tune.cpp

@@ -0,0 +1,202 @@
+#include "lf-rfid-view-tune.h"
+#include <callback-connector.h>
+#include <gui/elements.h>
+#include <variant>
+#include <list>
+
+struct LfRfidViewTuneModel {
+    bool dirty;
+    bool fine;
+    uint32_t ARR;
+    uint32_t CCR;
+    int pos;
+};
+
+void LfRfidViewTune::view_draw_callback(Canvas* canvas, void* _model) {
+    LfRfidViewTuneModel* model = reinterpret_cast<LfRfidViewTuneModel*>(_model);
+    canvas_clear(canvas);
+    canvas_set_color(canvas, ColorBlack);
+
+    if(model->fine) {
+        canvas_draw_box(
+            canvas,
+            128 - canvas_string_width(canvas, "Fine") - 4,
+            0,
+            canvas_string_width(canvas, "Fine") + 4,
+            canvas_current_font_height(canvas) + 1);
+        canvas_set_color(canvas, ColorWhite);
+    }
+    canvas_draw_str_aligned(canvas, 128 - 2, 2, AlignRight, AlignTop, "Fine");
+    canvas_set_color(canvas, ColorBlack);
+
+    constexpr uint8_t buffer_size = 128;
+    char buffer[buffer_size + 1];
+    snprintf(
+        buffer,
+        buffer_size,
+        "%sARR: %lu\n"
+        "freq = %.4f\n"
+        "%sCCR: %lu\n"
+        "duty = %.4f",
+        model->pos == 0 ? ">" : "",
+        model->ARR,
+        (float)SystemCoreClock / ((float)model->ARR + 1),
+        model->pos == 1 ? ">" : "",
+        model->CCR,
+        ((float)model->CCR + 1) / ((float)model->ARR + 1) * 100.0f);
+    elements_multiline_text_aligned(canvas, 2, 2, AlignLeft, AlignTop, buffer);
+}
+
+bool LfRfidViewTune::view_input_callback(InputEvent* event, void* context) {
+    LfRfidViewTune* _this = reinterpret_cast<LfRfidViewTune*>(context);
+    bool consumed = false;
+
+    // Process key presses only
+    if(event->type == InputTypeShort || event->type == InputTypeRepeat) {
+        consumed = true;
+
+        switch(event->key) {
+        case InputKeyLeft:
+            _this->button_left();
+            break;
+        case InputKeyRight:
+            _this->button_right();
+            break;
+        case InputKeyUp:
+            _this->button_up();
+            break;
+        case InputKeyDown:
+            _this->button_down();
+            break;
+        case InputKeyOk:
+            _this->button_ok();
+            break;
+        default:
+            consumed = false;
+            break;
+        }
+    }
+
+    return consumed;
+}
+
+void LfRfidViewTune::button_up() {
+    with_view_model_cpp(view, LfRfidViewTuneModel, model, {
+        if(model->pos > 0) model->pos--;
+        return true;
+    });
+}
+
+void LfRfidViewTune::button_down() {
+    with_view_model_cpp(view, LfRfidViewTuneModel, model, {
+        if(model->pos < 1) model->pos++;
+        return true;
+    });
+}
+
+void LfRfidViewTune::button_left() {
+    with_view_model_cpp(view, LfRfidViewTuneModel, model, {
+        if(model->pos == 0) {
+            if(model->fine) {
+                model->ARR -= 1;
+            } else {
+                model->ARR -= 10;
+            }
+        } else if(model->pos == 1) {
+            if(model->fine) {
+                model->CCR -= 1;
+            } else {
+                model->CCR -= 10;
+            }
+        }
+
+        model->dirty = true;
+        return true;
+    });
+}
+
+void LfRfidViewTune::button_right() {
+    with_view_model_cpp(view, LfRfidViewTuneModel, model, {
+        if(model->pos == 0) {
+            if(model->fine) {
+                model->ARR += 1;
+            } else {
+                model->ARR += 10;
+            }
+        } else if(model->pos == 1) {
+            if(model->fine) {
+                model->CCR += 1;
+            } else {
+                model->CCR += 10;
+            }
+        }
+
+        model->dirty = true;
+        return true;
+    });
+}
+
+void LfRfidViewTune::button_ok() {
+    with_view_model_cpp(view, LfRfidViewTuneModel, model, {
+        model->fine = !model->fine;
+        return true;
+    });
+}
+
+LfRfidViewTune::LfRfidViewTune() {
+    view = view_alloc();
+    view_set_context(view, this);
+    view_allocate_model(view, ViewModelTypeLocking, sizeof(LfRfidViewTuneModel));
+
+    with_view_model_cpp(view, LfRfidViewTuneModel, model, {
+        model->dirty = true;
+        model->fine = false;
+        model->ARR = 511;
+        model->CCR = 255;
+        model->pos = 0;
+        return true;
+    });
+
+    view_set_draw_callback(view, cbc::obtain_connector(this, &LfRfidViewTune::view_draw_callback));
+    view_set_input_callback(
+        view, cbc::obtain_connector(this, &LfRfidViewTune::view_input_callback));
+}
+
+LfRfidViewTune::~LfRfidViewTune() {
+    view_free(view);
+}
+
+View* LfRfidViewTune::get_view() {
+    return view;
+}
+
+bool LfRfidViewTune::is_dirty() {
+    bool result;
+    with_view_model_cpp(view, LfRfidViewTuneModel, model, {
+        result = model->dirty;
+        model->dirty = false;
+        return false;
+    });
+
+    return result;
+}
+
+uint32_t LfRfidViewTune::get_ARR() {
+    uint32_t result;
+    with_view_model_cpp(view, LfRfidViewTuneModel, model, {
+        result = model->ARR;
+        return false;
+    });
+
+    return result;
+}
+
+uint32_t LfRfidViewTune::get_CCR() {
+    uint32_t result;
+    with_view_model_cpp(view, LfRfidViewTuneModel, model, {
+        result = model->CCR;
+        return false;
+    });
+
+    return result;
+}

applications/lf-rfid/view/lf-rfid-view-tune.h

@@ -0,0 +1,25 @@
+#pragma once
+#include <gui/view.h>
+
+class LfRfidViewTune {
+public:
+    LfRfidViewTune();
+    ~LfRfidViewTune();
+
+    View* get_view();
+
+    bool is_dirty();
+    uint32_t get_ARR();
+    uint32_t get_CCR();
+
+private:
+    View* view;
+    void view_draw_callback(Canvas* canvas, void* _model);
+    bool view_input_callback(InputEvent* event, void* context);
+
+    void button_up();
+    void button_down();
+    void button_left();
+    void button_right();
+    void button_ok();
+};