text: #include "main.h"
  #include "stm32f4xx_hal.h"
  
  /* USER CODE BEGIN Includes */
  /* vim: set ai et ts=4 sw=4: */
  #include <string.h>
  #include <stdarg.h>
  #include "ssd1351.h"
  #include "fonts.h"
  #include "testimg.h"
  /* USER CODE END Includes */
  
  /* Private variables ---------------------------------------------------------*/
  SPI_HandleTypeDef hspi1;
  
  UART_HandleTypeDef huart2;
  
  /* USER CODE BEGIN PV */
  /* Private variables ---------------------------------------------------------*/
  
  /* USER CODE END PV */
  
  /* Private function prototypes -----------------------------------------------*/
  void SystemClock_Config(void);
  static void MX_GPIO_Init(void);
  static void MX_SPI1_Init(void);
  static void MX_USART2_UART_Init(void);
  
  /* USER CODE BEGIN PFP */
  /* Private function prototypes -----------------------------------------------*/
  
  /* USER CODE END PFP */
  
  /* USER CODE BEGIN 0 */
  
  void UART_Printf(const char* fmt, ...) {
      char buff[256];
      va_list args;
      va_start(args, fmt);
      vsnprintf(buff, sizeof(buff), fmt, args);
      HAL_UART_Transmit(&huart2, (uint8_t*)buff, strlen(buff),
                        HAL_MAX_DELAY);
      va_end(args);
  }
  
  void init() {
      SSD1351_Unselect();
      SSD1351_Init();
      UART_Printf("Init done!\r\n");
  }
  
  void loop() {
      // Check border
      SSD1351_FillScreen(SSD1351_BLACK);
  
      for(int x = 0; x < SSD1351_WIDTH; x++) {
          SSD1351_DrawPixel(x, 0, SSD1351_RED);
          SSD1351_DrawPixel(x, SSD1351_HEIGHT-1, SSD1351_RED);
      }
  
      for(int y = 0; y < SSD1351_HEIGHT; y++) {
          SSD1351_DrawPixel(0, y, SSD1351_RED);
          SSD1351_DrawPixel(SSD1351_WIDTH-1, y, SSD1351_RED);
      }
  
      HAL_Delay(3000);
  
      // Check fonts
      SSD1351_FillScreen(SSD1351_BLACK);
      SSD1351_WriteString(0, 0, "Font_7x10, red on black, lorem ipsum dolor sit amet", Font_7x10, SSD1351_RED, SSD1351_BLACK);
      SSD1351_WriteString(0, 3*10, "Font_11x18, green, lorem ipsum", Font_11x18, SSD1351_GREEN, SSD1351_BLACK);
      SSD1351_WriteString(0, 3*10+3*18, "Font_16x26, blue, lorem ipsum dolor sit amet", Font_16x26, SSD1351_BLUE, SSD1351_BLACK);
  
      HAL_Delay(1000);
      SSD1351_InvertColors(true);
      HAL_Delay(1000);
      SSD1351_InvertColors(false);
  
      HAL_Delay(5000);
  
      // Check colors
      SSD1351_FillScreen(SSD1351_WHITE);
      SSD1351_WriteString(0, 0, "WHITE", Font_11x18, SSD1351_BLACK, SSD1351_WHITE);
      HAL_Delay(500);
  
      SSD1351_FillScreen(SSD1351_BLUE);
      SSD1351_WriteString(0, 0, "BLUE", Font_11x18, SSD1351_BLACK, SSD1351_BLUE);
      HAL_Delay(500);
  
      SSD1351_FillScreen(SSD1351_RED);
      SSD1351_WriteString(0, 0, "RED", Font_11x18, SSD1351_BLACK, SSD1351_RED);
      HAL_Delay(500);
  
      SSD1351_FillScreen(SSD1351_GREEN);
      SSD1351_WriteString(0, 0, "GREEN", Font_11x18, SSD1351_BLACK, SSD1351_GREEN);
      HAL_Delay(500);
  
      SSD1351_FillScreen(SSD1351_CYAN);
      SSD1351_WriteString(0, 0, "CYAN", Font_11x18, SSD1351_BLACK, SSD1351_CYAN);
      HAL_Delay(500);
  
      SSD1351_FillScreen(SSD1351_MAGENTA);
      SSD1351_WriteString(0, 0, "MAGENTA", Font_11x18, SSD1351_BLACK, SSD1351_MAGENTA);
      HAL_Delay(500);
  
      SSD1351_FillScreen(SSD1351_YELLOW);
      SSD1351_WriteString(0, 0, "YELLOW", Font_11x18, SSD1351_BLACK, SSD1351_YELLOW);
      HAL_Delay(500);
  
      SSD1351_FillScreen(SSD1351_BLACK);
      SSD1351_WriteString(0, 0, "BLACK", Font_11x18, SSD1351_WHITE, SSD1351_BLACK);
      HAL_Delay(500);
  
      SSD1351_DrawImage(0, 0, 128, 128, (const uint16_t*)test_img_128x128);
  
      HAL_Delay(10000);
  }
  
  /* USER CODE END 0 */
  
  int main(void)
  {
  
    /* USER CODE BEGIN 1 */
  
    /* USER CODE END 1 */
  
    /* MCU Configuration----------------------------------------------------------*/
  
    /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
    HAL_Init();
  
    /* USER CODE BEGIN Init */
  
    /* USER CODE END Init */
  
    /* Configure the system clock */
    SystemClock_Config();
  
    /* USER CODE BEGIN SysInit */
  
    /* USER CODE END SysInit */
  
    /* Initialize all configured peripherals */
    MX_GPIO_Init();
    MX_SPI1_Init();
    MX_USART2_UART_Init();
  
    /* USER CODE BEGIN 2 */
  
    /* USER CODE END 2 */
  
    /* Infinite loop */
    /* USER CODE BEGIN WHILE */
    init();
    while (1)
    {
      loop();
    /* USER CODE END WHILE */
  
    /* USER CODE BEGIN 3 */
  
    }
    /* USER CODE END 3 */
  
  }
  
  /** System Clock Configuration
  */
  void SystemClock_Config(void)
  {
  
    RCC_OscInitTypeDef RCC_OscInitStruct;
    RCC_ClkInitTypeDef RCC_ClkInitStruct;
  
      /**Configure the main internal regulator output voltage 
      */
    __HAL_RCC_PWR_CLK_ENABLE();
  
    __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  
      /**Initializes the CPU, AHB and APB busses clocks 
      */
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
    RCC_OscInitStruct.HSIState = RCC_HSI_ON;
    RCC_OscInitStruct.HSICalibrationValue = 16;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
    RCC_OscInitStruct.PLL.PLLM = 16;
    RCC_OscInitStruct.PLL.PLLN = 336;
    RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
    RCC_OscInitStruct.PLL.PLLQ = 4;
    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
    {
      _Error_Handler(__FILE__, __LINE__);
    }
  
      /**Initializes the CPU, AHB and APB busses clocks 
      */
    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                                |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
  
    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
    {
      _Error_Handler(__FILE__, __LINE__);
    }
  
      /**Configure the Systick interrupt time 
      */
    HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
  
      /**Configure the Systick 
      */
    HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
  
    /* SysTick_IRQn interrupt configuration */
    HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
  }
  
  /* SPI1 init function */
  static void MX_SPI1_Init(void)
  {
  
    /* SPI1 parameter configuration*/
    hspi1.Instance = SPI1;
    hspi1.Init.Mode = SPI_MODE_MASTER;
    hspi1.Init.Direction = SPI_DIRECTION_1LINE;
    hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
    hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
    hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
    hspi1.Init.NSS = SPI_NSS_SOFT;
    hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_16;
    hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
    hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
    hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
    hspi1.Init.CRCPolynomial = 10;
    if (HAL_SPI_Init(&hspi1) != HAL_OK)
    {
      _Error_Handler(__FILE__, __LINE__);
    }
  
  }
  
  /* USART2 init function */
  static void MX_USART2_UART_Init(void)
  {
  
    huart2.Instance = USART2;
    huart2.Init.BaudRate = 9600;
    huart2.Init.WordLength = UART_WORDLENGTH_8B;
    huart2.Init.StopBits = UART_STOPBITS_1;
    huart2.Init.Parity = UART_PARITY_NONE;
    huart2.Init.Mode = UART_MODE_TX_RX;
    huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
    huart2.Init.OverSampling = UART_OVERSAMPLING_16;
    if (HAL_UART_Init(&huart2) != HAL_OK)
    {
      _Error_Handler(__FILE__, __LINE__);
    }
  
  }
  
  /** Configure pins as 
          * Analog 
          * Input 
          * Output
          * EVENT_OUT
          * EXTI
  */
  static void MX_GPIO_Init(void)
  {
  
    GPIO_InitTypeDef GPIO_InitStruct;
  
    /* GPIO Ports Clock Enable */
    __HAL_RCC_GPIOC_CLK_ENABLE();
    __HAL_RCC_GPIOH_CLK_ENABLE();
    __HAL_RCC_GPIOA_CLK_ENABLE();
    __HAL_RCC_GPIOB_CLK_ENABLE();
  
    /*Configure GPIO pin Output Level */
    HAL_GPIO_WritePin(GPIOC, GPIO_PIN_0|GPIO_PIN_1, GPIO_PIN_RESET);
  
    /*Configure GPIO pin Output Level */
    HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0, GPIO_PIN_RESET);
  
    /*Configure GPIO pin : B1_Pin */
    GPIO_InitStruct.Pin = B1_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct);
  
    /*Configure GPIO pins : PC0 PC1 */
    GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
  
    /*Configure GPIO pin : PB0 */
    GPIO_InitStruct.Pin = GPIO_PIN_0;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
  
  }
  
  /* USER CODE BEGIN 4 */
  
  /* USER CODE END 4 */
  
  /**
    * @brief  This function is executed in case of error occurrence.
    * @param  None
    * @retval None
    */
  void _Error_Handler(char * file, int line)
  {
    /* USER CODE BEGIN Error_Handler_Debug */
    /* User can add his own implementation to report the HAL error return state */
    while(1) 
    {
    }
    /* USER CODE END Error_Handler_Debug */ 
  }
  
  #ifdef USE_FULL_ASSERT
  
  /**
     * @brief Reports the name of the source file and the source line number
     * where the assert_param error has occurred.
     * @param file: pointer to the source file name
     * @param line: assert_param error line source number
     * @retval None
     */
  void assert_failed(uint8_t* file, uint32_t line)
  {
    /* USER CODE BEGIN 6 */
    /* User can add his own implementation to report the file name and line number,
      ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
    /* USER CODE END 6 */
  
  }
  
  #endif
  
  /**
    * @}
    */ 
  
  /**
    * @}
  */ 
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  