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+#include "malveke_gb_emulator.h"
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+#include <malveke_gb_emulator_icons.h>
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+
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+static void malveke_gb_emulator_view_draw_callback(Canvas* canvas, void* _model) {
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+ UartDumpModel* model = _model;
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+
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+ // Prepare canvas
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+ canvas_set_color(canvas, ColorBlack);
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+ canvas_draw_frame(canvas, 0, 0, FRAME_WIDTH, FRAME_HEIGTH);
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+
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+ for(size_t p = 0; p < FRAME_BUFFER_LENGTH; ++p) {
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+ uint8_t x = p % ROW_BUFFER_LENGTH; // 0 .. 15
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+ uint8_t y = p / ROW_BUFFER_LENGTH; // 0 .. 63
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+
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+ for(uint8_t i = 0; i < 8; ++i) {
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+ if((model->pixels[p] & (1 << (7 - i))) != 0) {
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+ canvas_draw_dot(canvas, (x * 8) + i, y);
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+ }
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+ }
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+ }
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+
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+ if(!model->initialized) {
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+ canvas_draw_icon(canvas, 60, 7, &I_malveke_67x49);
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+ canvas_set_font(canvas, FontSecondary);
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+
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+ canvas_draw_str(canvas, 4, 25, "Connect");
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+ canvas_set_font(canvas, FontPrimary);
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+ canvas_draw_str(canvas, 4, 35, "MALVEKE");
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+ canvas_set_font(canvas, FontSecondary);
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+ canvas_draw_str(canvas, 4, 44, "into Flipper");
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+ elements_button_center(canvas, "Ok");
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+ // canvas_set_font(canvas, FontPrimary);
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+ // canvas_draw_str(canvas, 8, 28, "GAME BOY");
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+ // canvas_draw_icon(canvas, 76, 8, &I_gbcam_48x49);
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+ // canvas_set_font(canvas, FontSecondary);
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+ // canvas_draw_str(canvas, 8, 18, "WAITING");
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+ // canvas_set_font(canvas, FontPrimary);
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+ // canvas_draw_str(canvas, 8, 38, "CAMERA...");
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+ // canvas_set_font(canvas, FontSecondary);
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+ // canvas_draw_str(canvas, 9, 47, "Insert Cartridge");
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+ // elements_button_center(canvas, "Ok");
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+ }
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+}
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+
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+static bool malveke_gb_emulator_view_input_callback(InputEvent* event, void* context) {
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+ UartEchoApp* instance = context;
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+ UNUSED(instance);
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+ if(event->type == InputTypePress) {
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+ if(event->key == InputKeyUp) {
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+ const char gbemulator_command_up[] = "U\n";
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+ furi_hal_serial_tx(
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+ instance->serial_handle_uart,
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+ (uint8_t*)gbemulator_command_up,
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+ strlen(gbemulator_command_up));
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+
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+ } else if(event->key == InputKeyDown) {
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+ const char gbemulator_command_down[] = "D\n";
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+ furi_hal_serial_tx(
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+ instance->serial_handle_uart,
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+ (uint8_t*)gbemulator_command_down,
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+ strlen(gbemulator_command_down));
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+ } else if(event->key == InputKeyRight) {
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+ const char gbemulator_command_right[] = ">\n";
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+ furi_hal_serial_tx(
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+ instance->serial_handle_uart,
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+ (uint8_t*)gbemulator_command_right,
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+ strlen(gbemulator_command_right));
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+ } else if(event->key == InputKeyLeft) {
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+ const char gbemulator_command_left[] = "<\n";
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+ furi_hal_serial_tx(
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+ instance->serial_handle_uart,
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+ (uint8_t*)gbemulator_command_left,
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+ strlen(gbemulator_command_left));
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+ } else if(event->key == InputKeyOk) {
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+ with_view_model(
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+ instance->view,
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+ UartDumpModel * model,
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+ {
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+ UNUSED(model);
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+ const char gbemulator_command_OK[] = "S\n";
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+ furi_hal_serial_tx(
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+ instance->serial_handle_uart,
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+ (uint8_t*)gbemulator_command_OK,
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+ strlen(gbemulator_command_OK));
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+ },
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+ false);
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+ }
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+ }
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+ return false;
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+}
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+
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+static uint32_t malveke_gb_emulator_exit(void* context) {
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+ UartEchoApp* instance = context;
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+ const char stop_command[] = "stopgblivecamera\n";
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+ furi_hal_serial_tx(instance->serial_handle_uart, (uint8_t*)stop_command, strlen(stop_command));
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+ return VIEW_NONE;
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+}
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+
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+static void malveke_gb_emulator_on_irq_cb(
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+ FuriHalSerialHandle* handle,
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+ FuriHalSerialRxEvent event,
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+ void* context) {
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+ furi_assert(context);
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+ UartEchoApp* app = context;
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+
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+ if(event == FuriHalSerialRxEventData) {
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+ uint8_t data = furi_hal_serial_async_rx(handle);
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+ furi_stream_buffer_send(app->rx_stream, &data, 1, 0);
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+ furi_thread_flags_set(furi_thread_get_id(app->worker_thread), WorkerEventRx);
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+ }
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+}
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+
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+static void process_ringbuffer(UartDumpModel* model, uint8_t byte) {
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+ //// 1. Phase: filling the ringbuffer
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+ if(model->ringbuffer_index == 0 && byte != 'Y') { // First char has to be 'Y' in the buffer.
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+ return;
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+ }
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+
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+ if(model->ringbuffer_index == 1 &&
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+ byte != ':') { // Second char has to be ':' in the buffer or reset.
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+ model->ringbuffer_index = 0;
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+ process_ringbuffer(model, byte);
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+ return;
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+ }
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+
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+ model->row_ringbuffer[model->ringbuffer_index] =
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+ byte; // Assign current byte to the ringbuffer;
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+ ++model->ringbuffer_index; // Increment the ringbuffer index
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+
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+ if(model->ringbuffer_index < RING_BUFFER_LENGTH) { // Let's wait 'till the buffer fills.
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+ return;
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+ }
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+
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+ //// 2. Phase: flushing the ringbuffer to the framebuffer
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+ model->ringbuffer_index = 0; // Let's reset the ringbuffer
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+ model->initialized = true; // We've successfully established the connection
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+ size_t row_start_index =
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+ model->row_ringbuffer[2] * ROW_BUFFER_LENGTH; // Third char will determine the row number
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+
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+ if(row_start_index > LAST_ROW_INDEX) { // Failsafe
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+ row_start_index = 0;
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+ }
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+
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+ for(size_t i = 0; i < ROW_BUFFER_LENGTH; ++i) {
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+ model->pixels[row_start_index + i] =
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+ model->row_ringbuffer[i + 3]; // Writing the remaining 16 bytes into the frame buffer
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+ }
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+}
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+
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+static int32_t malveke_gb_emulator_worker(void* context) {
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+ furi_assert(context);
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+ UartEchoApp* app = context;
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+
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+ while(1) {
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+ uint32_t events =
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+ furi_thread_flags_wait(WORKER_EVENTS_MASK, FuriFlagWaitAny, FuriWaitForever);
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+ furi_check((events & FuriFlagError) == 0);
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+
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+ if(events & WorkerEventStop) break;
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+ if(events & WorkerEventRx) {
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+ size_t length = 0;
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+ do {
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+ size_t intended_data_size = 64;
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+ uint8_t data[intended_data_size];
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+ length = furi_stream_buffer_receive(app->rx_stream, data, intended_data_size, 0);
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+
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+ if(length > 0) {
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+ with_view_model(
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+ app->view,
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+ UartDumpModel * model,
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+ {
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+ for(size_t i = 0; i < length; i++) {
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+ process_ringbuffer(model, data[i]);
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+ }
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+ },
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+ false);
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+ }
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+ } while(length > 0);
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+
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+ notification_message(app->notification, &sequence_notification);
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+ with_view_model(
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+ app->view, UartDumpModel * model, { UNUSED(model); }, true);
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+ }
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+ }
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+
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+ return 0;
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+}
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+
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+static UartEchoApp* malveke_gb_emulator_app_alloc() {
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+ UartEchoApp* app = malloc(sizeof(UartEchoApp));
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+
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+ app->rx_stream = furi_stream_buffer_alloc(2048, 1);
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+
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+ // Gui
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+ app->gui = furi_record_open(RECORD_GUI);
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+ app->notification = furi_record_open(RECORD_NOTIFICATION);
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+
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+ // View dispatcher
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+ app->view_dispatcher = view_dispatcher_alloc();
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+ view_dispatcher_enable_queue(app->view_dispatcher);
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+ view_dispatcher_attach_to_gui(app->view_dispatcher, app->gui, ViewDispatcherTypeFullscreen);
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+
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+ // Views
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+ app->view = view_alloc();
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+ view_set_context(app->view, app);
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+ view_set_draw_callback(app->view, malveke_gb_emulator_view_draw_callback);
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+ view_set_input_callback(app->view, malveke_gb_emulator_view_input_callback);
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+ view_allocate_model(app->view, ViewModelTypeLocking, sizeof(UartDumpModel));
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+
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+ with_view_model(
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+ app->view,
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+ UartDumpModel * model,
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+ {
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+ for(size_t i = 0; i < FRAME_BUFFER_LENGTH; i++) {
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+ model->pixels[i] = 0;
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+ }
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+ },
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+ true);
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+
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+ view_set_previous_callback(app->view, malveke_gb_emulator_exit);
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+ view_dispatcher_add_view(app->view_dispatcher, 0, app->view);
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+ view_dispatcher_switch_to_view(app->view_dispatcher, 0);
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+
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+ app->worker_thread =
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+ furi_thread_alloc_ex("UsbUartWorker", 2048, malveke_gb_emulator_worker, app);
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+ furi_thread_start(app->worker_thread);
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+
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+ // Enable uart listener (UART & UART1)
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+ app->serial_handle_uart = furi_hal_serial_control_acquire(FuriHalSerialIdUsart);
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+ if(!app->serial_handle_uart) {
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+ furi_delay_ms(5000);
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+ }
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+ furi_check(app->serial_handle_uart);
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+ furi_hal_serial_init(app->serial_handle_uart, 115200);
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+
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+ app->serial_handle_lp_uart = furi_hal_serial_control_acquire(FuriHalSerialIdLpuart);
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+ if(!app->serial_handle_lp_uart) {
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+ furi_delay_ms(5000);
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+ }
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+ furi_check(app->serial_handle_lp_uart);
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+ furi_hal_serial_init(app->serial_handle_lp_uart, 250000);
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+ furi_hal_serial_async_rx_start(
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+ app->serial_handle_lp_uart, malveke_gb_emulator_on_irq_cb, app, false);
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+
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+ furi_hal_power_enable_otg();
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+ furi_delay_ms(1);
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+ return app;
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+}
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+
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+static void malveke_gb_emulator_app_free(UartEchoApp* app) {
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+ furi_assert(app);
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+
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+ furi_thread_flags_set(furi_thread_get_id(app->worker_thread), WorkerEventStop);
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+ furi_thread_join(app->worker_thread);
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+ furi_thread_free(app->worker_thread);
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+
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+ furi_hal_serial_deinit(app->serial_handle_uart);
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+ furi_hal_serial_control_release(app->serial_handle_uart);
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+
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+ furi_hal_serial_deinit(app->serial_handle_lp_uart);
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+ furi_hal_serial_control_release(app->serial_handle_lp_uart);
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+
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+ // Free views
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+ view_dispatcher_remove_view(app->view_dispatcher, 0);
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+
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+ view_free(app->view);
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+ view_dispatcher_free(app->view_dispatcher);
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+
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+ // Close gui record
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+ furi_record_close(RECORD_GUI);
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+ furi_record_close(RECORD_NOTIFICATION);
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+ app->gui = NULL;
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+
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+ furi_stream_buffer_free(app->rx_stream);
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+
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+ // Free rest
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+ free(app);
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+}
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+
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+int32_t malveke_gb_emulator_app(void* p) {
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+ UNUSED(p);
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+ // Disable expansion protocol to avoid interference with UART Handle
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+ Expansion* expansion = furi_record_open(RECORD_EXPANSION);
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+ expansion_disable(expansion);
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+
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+ UartEchoApp* app = malveke_gb_emulator_app_alloc();
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+ view_dispatcher_run(app->view_dispatcher);
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+ malveke_gb_emulator_app_free(app);
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+
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+ furi_hal_power_disable_otg();
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+
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+ // Return previous state of expansion
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+ expansion_enable(expansion);
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+ furi_record_close(RECORD_EXPANSION);
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+
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+ return 0;
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+}
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Willy-JL
