tpms_monitor.c

#include <furi.h>
#include <furi-hal.h>
#include <gui/gui.h>
#include <gui/view_port.h>
#include <subghz/subghz.h>

// Define the plugin state
typedef struct {
    SubGhzProtocolCommon* protocol;
    uint8_t tire_pressure;
    uint16_t model_year;
} TpmsMonitorState;

void subghz_protocol_common_load(SubGhzProtocolCommon* instance, const SubGhzProtocolCommonEncoder* encoder) {
    furi_assert(instance);
    furi_assert(encoder);

    instance->common_encoder = encoder;

    // Set modulation settings
    instance->modulation = FuriHalSubGhzModulationFSK;
    instance->real_frequency = 433.92f; // Carrier frequency
    instance->real_bitrate = 125.0f; // Data rate
    instance->real_frequency_deviation = 10.0f; // Frequency deviation
    instance->real_packet_duration = 1000.0f / instance->real_bitrate; // Packet duration
}

// The main function for the plugin
int32_t tpms_monitor_app(void* p) {
    // Allocate and initialize the plugin state
    TpmsMonitorState* state = furi_alloc(sizeof(TpmsMonitorState));

    // Initialize the Sub-GHz module
    state->protocol = subghz_protocol_common_alloc();
    subghz_protocol_load(state->protocol, "TPMS Ford");  // Load the Ford TPMS protocol

    // Set the frequency based on the model year
    if (state->model_year >= 2003 && state->model_year <= 2004) {
        subghz_protocol_set_frequency(state->protocol, 433000000);  // Set frequency to 433 MHz
    } else if (state->model_year >= 2005) {
        subghz_protocol_set_frequency(state->protocol, 315000000);  // Set frequency to 315 MHz
    }

    // Create a view port for the plugin
    ViewPort* view_port = view_port_alloc();

    // Set up the input and render callbacks
    // You will need to implement these functions
    view_port_input_callback_set(view_port, tpms_monitor_input_callback, state);
    view_port_draw_callback_set(view_port, tpms_monitor_render_callback, state);

    // Register the view port with the GUI
    Gui* gui = furi_record_open("gui");
    gui_add_view_port(gui, view_port, GuiLayerFullscreen);

    // Main loop
    while(1) {
        // Handle input and update the state here

        // Analyze the TPMS signal
        uint32_t signal = subghz_protocol_get_raw_data(state->protocol);
        state->tire_pressure = (uint8_t)(signal & 0xFF);  // Extract the tire pressure from the signal

        // Trigger a screen update
        view_port_update(view_port);
    }

    // Clean up
    view_port_free(view_port);
    furi_record_close("gui");
    subghz_protocol_free(state->protocol);
    free(state);

    return 0;
}