/**
  ******************************************************************************
  * File Name          : main.c
  * Description        : Main program body
  ******************************************************************************
  *
  * COPYRIGHT(c) 2016 STMicroelectronics
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  */
/* Includes ------------------------------------------------------------------*/
#include "stm32f1xx_hal.h"
#include "cmsis_os.h"

/* USER CODE BEGIN Includes */
#include "gfx.h"
extern void tft_init(void);
/* USER CODE END Includes */

/* Private variables ---------------------------------------------------------*/
CRC_HandleTypeDef hcrc;

SPI_HandleTypeDef hspi1;
DMA_HandleTypeDef hdma_spi1_tx;

UART_HandleTypeDef huart1;
DMA_HandleTypeDef hdma_usart1_tx;

osThreadId ClockPrinterHandle;

/* USER CODE BEGIN PV */
static __IO struct DISPLAY_CONTEXT lcd_ctx;
static __IO uint8_t hour;
static __IO uint8_t min;
static __IO uint8_t sec;
static __IO uint8_t msec;
static __IO uint8_t changed;
static __IO uint8_t running;
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
void Error_Handler(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_CRC_Init(void);
static void MX_SPI1_Init(void);
static void MX_USART1_UART_Init(void);
void TaskClock(void const * argument);

/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*/

/* USER CODE END PFP */

/* USER CODE BEGIN 0 */
int strlen(const char* str)
{
  int n = 0;
  for(;str && *str; ++str, ++n);
  return n;
}


void print_string(const char* s)
{
  while(HAL_UART_Transmit_DMA(&huart1, (uint8_t*)s, strlen(s))==HAL_BUSY);
}
/* USER CODE END 0 */

int main(void)
{

  /* USER CODE BEGIN 1 */
  running = 0;

  /* USER CODE END 1 */

  /* MCU Configuration----------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* Configure the system clock */
  SystemClock_Config();

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DMA_Init();
  MX_CRC_Init();
  MX_SPI1_Init();
  MX_USART1_UART_Init();

  /* USER CODE BEGIN 2 */
  init_display_context(&lcd_ctx);
  tft_init();
//  text(&lcd_ctx, "AAA", 2, 1, 0xFF0000);
  /* USER CODE END 2 */

  /* USER CODE BEGIN RTOS_MUTEX */
  /* USER CODE END RTOS_MUTEX */

  /* USER CODE BEGIN RTOS_SEMAPHORES */
  /* add semaphores, ... */
  /* USER CODE END RTOS_SEMAPHORES */

  /* USER CODE BEGIN RTOS_TIMERS */
  /* start timers, add new ones, ... */
  /* USER CODE END RTOS_TIMERS */

  /* Create the thread(s) */
  /* definition and creation of Display */
  osThreadDef(ClockPrinter, TaskClock, osPriorityNormal, 0, 200);
  ClockPrinterHandle = osThreadCreate(osThread(ClockPrinter), NULL);

  /* USER CODE BEGIN RTOS_THREADS */
  /* add threads, ... */
  /* USER CODE END RTOS_THREADS */

  /* USER CODE BEGIN RTOS_QUEUES */
  /* add queues, ... */
  /* USER CODE END RTOS_QUEUES */
 

  /* Start scheduler */
  osKernelStart();
  
  /* We should never get here as control is now taken by the scheduler */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
  /* 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;

  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_DIV2;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL4;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  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_DIV2;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
  {
    Error_Handler();
  }

  HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

  HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

  /* SysTick_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(SysTick_IRQn, 15, 0);
}

/* CRC init function */
static void MX_CRC_Init(void)
{

  hcrc.Instance = CRC;
  if (HAL_CRC_Init(&hcrc) != HAL_OK)
  {
    Error_Handler();
  }

}

/* SPI1 init function */
static void MX_SPI1_Init(void)
{

  hspi1.Instance = SPI1;
  hspi1.Init.Mode = SPI_MODE_MASTER;
  hspi1.Init.Direction = SPI_DIRECTION_2LINES;
  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_2;
  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();
  }

}

/* USART1 init function */
static void MX_USART1_UART_Init(void)
{

  huart1.Instance = USART1;
  huart1.Init.BaudRate = 9600;
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.Mode = UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
    Error_Handler();
  }

}

/** 
  * Enable DMA controller clock
  */
static void MX_DMA_Init(void) 
{
  /* DMA controller clock enable */
  __HAL_RCC_DMA1_CLK_ENABLE();

  /* DMA interrupt init */
  /* DMA1_Channel3_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel3_IRQn, 5, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel3_IRQn);
  /* DMA1_Channel4_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel4_IRQn, 5, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel4_IRQn);

}

/** Configure pins as 
        * Analog 
        * Input 
        * Output
        * EVENT_OUT
        * EXTI
        * Free pins are configured automatically as Analog (this feature is enabled through 
        * the Code Generation settings)
*/
static void MX_GPIO_Init(void)
{

  GPIO_InitTypeDef GPIO_InitStruct;

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOD_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();

  /*Configure GPIO pins : PC13 PC14 PC15 PC0 
                           PC1 PC2 PC3 PC4 
                           PC5 PC6 PC7 PC8 
                           PC9 PC10 PC11 PC12 */
  GPIO_InitStruct.Pin = GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15|GPIO_PIN_0 
                          |GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_4 
                          |GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7|GPIO_PIN_8 
                          |GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

  /*Configure GPIO pins : PD0 PD1 PD2 */
  GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);

  /*Configure GPIO pins : PA0 PA1 PA2 PA3 PA4 
                           PA6 PA8 PA11 PA12 
                           PA13 PA14 PA15 */
  GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_4 
                          |GPIO_PIN_6|GPIO_PIN_8|GPIO_PIN_11|GPIO_PIN_12 
                          |GPIO_PIN_13|GPIO_PIN_14;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pin : PA15 */
  GPIO_InitStruct.Pin = GPIO_PIN_15;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pins : PB0 PB1 PB2 PB10 
                           PB11 PB12 PB13 PB14 
                           PB15 PB3 PB4 PB5 
                           PB6 PB7 PB8 PB9 */
  GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_10 
                          |GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14 
                          |GPIO_PIN_15|GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5 
                          |GPIO_PIN_6|GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /*Configure peripheral I/O remapping */
  __HAL_AFIO_REMAP_PD01_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOA, GPIO_PIN_15, GPIO_PIN_RESET);

}

/* USER CODE BEGIN 4 */
const char* itoa(int16_t v, char* txt, int sz, int mindig)
{
  if (v)
  {
    int8_t isneg = v < 0 ? 1 : 0;
    char* s = &txt[sz-1];
    *s = 0;
    s--;
    for(;v;v/=10)
    {
      uint8_t res = v%10;
      *s = res + '0';
      s--; 
      mindig--;
    }
    for(int i=0; i<mindig; i++)
    {
      *s = '0';
      --s;
    } 
    if (isneg) 
    {
      *s = '-';
      s--;
    }
    return s+1;
  }
  else
  {
    for(int i=0; i<mindig; i++)
      txt[i] = '0';
    txt[mindig] = 0;
  }
  return txt;
}
/* USER CODE END 4 */

/* TaskClock function */
void TaskClock(void const * argument)
{
  /* USER CODE BEGIN 5 */
  hour = 0;
  min = 0;
  sec = 0;
  msec = 0;

  uint8_t hour_input = 0;
  uint8_t min_input = 0;
  uint8_t sec_input = 0;

  line(3,3,3,LCD_HEIGHT-3, 0x505050);
  line(3,LCD_HEIGHT-3,LCD_WIDTH-3,LCD_HEIGHT-3, 0x505050);
  line(LCD_WIDTH-3,LCD_HEIGHT-3,LCD_WIDTH-3,3, 0x505050);
  line(LCD_WIDTH-3,3,3,3, 0x505050);
  print_string("Enter time (h:m:s): ");

  const char* str = "Clock on FreeRTOS";
  struct SIZE sz = get_text_size(&lcd_ctx, str);
  text(&lcd_ctx, str, (LCD_WIDTH - sz.cx)/2, 45, 0x0FAA7F);

  sz = get_text_size(&lcd_ctx, "00:00:00.0");
  uint8_t xhour = (LCD_WIDTH - sz.cx)/2;
  uint8_t y = (LCD_HEIGHT - sz.cy)/2;
  text(&lcd_ctx, "00", xhour, y, 0xFF0000);
  text(&lcd_ctx, ":", -1, -1, 0x00AF00);
  uint8_t xmin = lcd_ctx.x;
  text(&lcd_ctx, "00", -1, -1, 0x0000FF);
  text(&lcd_ctx, ":", -1, -1, 0x00AF00);
  uint8_t xsec = lcd_ctx.x;
  text(&lcd_ctx, "00", -1, -1, 0xFF00FF);
  text(&lcd_ctx, ".", -1, -1, 0x00AF00);
  uint8_t xmsec = lcd_ctx.x;
  text(&lcd_ctx, "0", -1, -1, 0xFF008F);

  changed = 0;
  running = 1;
  uint8_t stage = 0;

  #define VC_ENTER  13

  /* Infinite loop */
  for(;;)
  {
    uint8_t dt;
    if (HAL_UART_Receive(&huart1, &dt, 1, 10) == HAL_OK)
    {
      if (dt>='0' && dt<='9')
      {
        running = 0;      // user input suspends the clock
        switch(stage)
        {
          case 0: hour_input = hour_input*10 + dt-'0'; break; 
          case 1: min_input = min_input*10 + dt-'0'; break;
          case 2: sec_input = sec_input*10 + dt-'0'; break;
        }
      }
      else
      if (dt==':')
      { stage = (stage+1)%3;
        switch(stage)
        {
          case 0: hour_input = 0; break;
          case 1: min_input = 0; break; 
          case 2: sec_input = 0; break;
        }
      }  
      else
      if(dt == VC_ENTER)
      {
        msec = 0;
        hour = hour_input > 23 ? 23 : hour_input;
        min = min_input > 59 ? 59 : min_input;
        sec = sec_input > 59 ? 59 : sec_input;
        hour_input = 0;
        min_input = 0;
        sec_input = 0;
        changed = 0xF;
        stage = 0;
        running = 1;
        print_string("Clock is set and running. ");
        print_string("Enter time (h:m:s): ");
      }
    }
    if (changed) 
    { char txt[6];
      if (changed&8)
      { changed &= ~8;
        text(&lcd_ctx, itoa(hour, txt, 6, 2), xhour, -1, 0xFF0000);
      }
      //text(&lcd_ctx, ":", -1, -1, 0x00FF00);
      if (changed&4)
      { changed &= ~4;
        text(&lcd_ctx, itoa(min, txt, 6, 2), xmin, -1, 0x0000FF);
      }
      //text(&lcd_ctx, ":", -1, -1, 0x00FF00);
      if (changed&2)
      { changed &= ~2;
        text(&lcd_ctx, itoa(sec, txt, 6, 2), xsec, -1, 0xFF00FF);
      }
      if (changed&1)
      { changed &= ~1;
        text(&lcd_ctx, itoa(msec, txt, 6, 1), xmsec, -1, 0xFF008F);
      }
    }
  }
  /* USER CODE END 5 */ 
}

/**
  * @brief  Period elapsed callback in non blocking mode
  * @note   This function is called  when TIM1 interrupt took place, inside
  * HAL_TIM_IRQHandler(). It makes a direct call to HAL_IncTick() to increment
  * a global variable "uwTick" used as application time base.
  * @param  htim : TIM handle
  * @retval None
  */
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
/* USER CODE BEGIN Callback 0 */

/* USER CODE END Callback 0 */
  if (htim->Instance == TIM1) {
    HAL_IncTick();
    if (!running)
      return;
    if ((HAL_GetTick() % 100) == 0)
    {
      msec++;
      changed |= 1;
      if (msec==10)
      { msec = 0;        
        sec++;
        changed |= 2;
        if (sec==60)
        {
          sec = 0;
          min++;
          changed |= 4;
          if (min==60)
          {
            min = 0;
            hour++;
            changed |= 8;
          }
        }
      }
    }
  }
/* USER CODE BEGIN Callback 1 */

/* USER CODE END Callback 1 */
}

/**
  * @brief  This function is executed in case of error occurrence.
  * @param  None
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler */
  /* User can add his own implementation to report the HAL error return state */
  while(1) 
  {
  }
  /* USER CODE END Error_Handler */ 
}

#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****/