/* Initialize all configured peripherals */

    init_gpio();

    MX_USB_DEVICE_Init();

    // USB startup delay

    HAL_Delay(1000);

    HAL_GPIO_WritePin(LED_POWER, 1);

    // TODO: Awesome pwm of power LED 

    // Configure 1ms SysTick (change if more temporal resolution needed) 

    //RCC_ClocksTypeDef RCC_Clocks;

    //RCC_GetClocksFreq(&RCC_Clocks);

    //SysTick_Config(RCC_Clocks.HCLK_Frequency / 1000);

    // Init SPI busses

    init_spi();

    // Init OLED over SPI

    ssd1306_Init();

    ssd1306_clearscreen();

    // Default settings 

    set.boottobrew = 0;

    set.temp_units = TEMP_UNITS_CELSIUS;

    set.windup_guard = 1;

    set.k_p = 1;

    set.k_i = 1;

    set.k_d = 1;

    set.ignore_tc_error = 0;

    set.setpoint_brew = 0;

    set.setpoint_steam = 0;

    // Default status

    status.temp = 0;

    status.temp_frac = 0;

    status.state_resume = 0;

    status.state = STATE_IDLE;

    status.setpoint = 0;

    status.pid_enabled = 0;

    // Load settings (if any) from EEPROM

    restore_settings();

    if(set.boottobrew)

      status.state = STATE_PREHEAT_BREW; // Go to brew instead of idle if configured thusly

    // Startup screen 

    ssd1306_DrawString("protofusion.org/therm", 3, 0);

    HAL_Delay(1500);

    ssd1306_clearscreen();

    // Main loop

    while(1)

    {

        // Process sensor inputs

        process();

        // Run state machine

        display_process(&set, &status); 

    }

}

/** System Clock Configuration

*/

void SystemClock_Config(void)

{

  RCC_OscInitTypeDef RCC_OscInitStruct;

  RCC_ClkInitTypeDef RCC_ClkInitStruct;

  RCC_PeriphCLKInitTypeDef PeriphClkInit;

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48;

  RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;

  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;

  HAL_RCC_OscConfig(&RCC_OscInitStruct);

  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK;

  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI48;

  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;

  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

  HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1);

  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;

  PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;

  HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit);

  __SYSCFG_CLK_ENABLE();

}

void update_temp() {