/**
  ******************************************************************************
  * 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"

/* USER CODE BEGIN Includes */
#include "ap_math.h"
#include "serial.h"
#include "SSD1306.h"
#include "Font.h"
#include "dials.h"
#include "switches.h"
#include <math.h>
#include "plx.h"
#include "eeprom.h"

/* USER CODE END Includes */

/* Private variables ---------------------------------------------------------*/
SPI_HandleTypeDef hspi1;

UART_HandleTypeDef huart1;
UART_HandleTypeDef huart2;

/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/
#define MAXRDG 32

int OldObservation[2] =
{ -1, -1 }; // illegal initial value
int OldObservationIndex[2] =
{ -1, -1 }; // if more than one sensor this will be printed
int16_t dial0[2] =
{ 0, 0 };
int16_t dial1[2] =
{ -1, -1 };

uint16_t dial_timer[2] =
{ 0, 0 };

static const int DialTimeout = 50; // about 20 seconds after twiddle, save the dial position.

/* Virtual address defined by the user: 0xFFFF value is prohibited */
uint16_t VirtAddVarTab[NumbOfVar] = {0x1111,0x2222 }  ;

union
{
	PLX_SensorInfo Sensor[MAXRDG];
	char Bytes[MAXRDG * sizeof(PLX_SensorInfo)];
} Data;
int Max[MAXRDG];
int Min[MAXRDG];
int PLXItems;
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
void Error_Handler(void);
static void MX_GPIO_Init(void);
static void MX_SPI1_Init(void);
static void MX_USART2_UART_Init(void);
static void MX_USART1_UART_Init(void);

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

/* USER CODE END PFP */

/* USER CODE BEGIN 0 */
/* dummy function */
void _init(void)
{

}
// the dial is the switch number we are using.
// suppress is the ItemIndex we wish to suppress on this display
int  DisplayCurrent(int dial,int suppress)
{
	char buff[10];
	int i;
	int rc;
	select_display(dial); // pick the display we are using
	int ItemIndex = dial_pos[dial]/4;

	// wrap around count if dial too far to the right
	if (ItemIndex >= PLXItems)
	{
		dial_pos[dial] = 0;
		ItemIndex = 0;
	}
	if (ItemIndex < 0)
	{
		ItemIndex = PLXItems-1;
		dial_pos[dial] = (PLXItems-1)*4;
	}



	// check for item suppression
	if(ItemIndex == suppress)
	{
		dial1[dial] = -1;
		OldObservation[dial] = -1;
		OldObservationIndex[dial] = -1;

		clearDisplay();
		display();
		return -1; // we suppressed this display
	}
	// do not try to convert if no items in buffer
	if (PLXItems > 0)
	{
		int DataVal = ConvPLX(Data.Sensor[ItemIndex].ReadingH,
				Data.Sensor[ItemIndex].ReadingL); // data reading
		int Observation = ConvPLX(Data.Sensor[ItemIndex].AddrH,
				Data.Sensor[ItemIndex].AddrL);
		int ObservationIndex = ConvPLX(0, Data.Sensor[ItemIndex].Instance);
		// now to convert the readings and format strings
		// find out limits
		char * msg;
		int len;

		// if the user presses the dial then reset min/max to current value
		if(push_pos[dial] == 1)
		{
				Max[ItemIndex] = DataVal;
				Min[ItemIndex] = DataVal; // 12 bit max value
		}



		if (Observation < PLX_MAX_OBS)
		{
			if (Observation != OldObservation[dial]
					|| ObservationIndex != OldObservationIndex[dial])
			{

                dial_timer[dial] = DialTimeout;

				dial1[dial] = -1;
				clearDisplay();
				dial_draw_scale(
						DisplayInfo[Observation].Low,
						DisplayInfo[Observation].High,
					    12, 1,DisplayInfo[Observation].TickScale);

				msg = DisplayInfo[Observation].name;
				len = 7;
				int len1  = ObservationIndex > 0 ? len-1: len;
				for (i = 0; i < len1 && msg[i]; i++)
				{
					buff[i] = msg[i];
				}
				if (ObservationIndex > 0 && i<len)
				{
					buff[i++] = ObservationIndex + '1';
				}

				print_large_string(buff, 64-i*4, 48, i); // this prints spaces for \0 at end of string

				OldObservation[dial] = Observation;
				OldObservationIndex[dial] = ObservationIndex;
				//
				display();

			}
			else
			{
				// check for timer timeout on consistent timer
				if(dial_timer[dial])
				{
					dial_timer[dial]--;

					if(dial_timer[dial]==0  )
					{
						uint16_t curr_val = dial_pos[dial];
						rc = EE_ReadVariable(VirtAddVarTab[dial],&curr_val);
						if((rc !=0) || (curr_val != dial_pos[dial]))
						{
						  EE_WriteVariable(VirtAddVarTab[dial],dial_pos[dial]);
  					    }
					}
				}

			}

			double max_rdg;
			double min_rdg;
			double cur_rdg;
			int int_rdg;
			int int_max;
			int int_min;

			max_rdg = ConveriMFDRaw2Data(Observation,
					DisplayInfo[Observation].Units, Max[ItemIndex]);
			min_rdg = ConveriMFDRaw2Data(Observation,
					DisplayInfo[Observation].Units, Min[ItemIndex]);
			cur_rdg = ConveriMFDRaw2Data(Observation,
					DisplayInfo[Observation].Units, DataVal);

			int dp_pos;  // where to print the decimal place
			switch (DisplayInfo[Observation].DP)
			{
			case 0:
				int_rdg = (int) (cur_rdg);
				int_max = (int) (max_rdg);
				int_min = (int) (min_rdg);
				dp_pos = 100;
				break;
			case 1:
				int_rdg = (int) (cur_rdg * 10.0);
				int_max = (int) (max_rdg * 10.0);
				int_min = (int) (min_rdg * 10.0);
				dp_pos = 3;
				break;
			case 2:
				int_rdg = (int) (cur_rdg * 100.0);
				int_max = (int) (max_rdg * 100.0);
				int_min = (int) (min_rdg * 100.0);
				dp_pos = 2;
				break;
			}

			cur_rdg -= DisplayInfo[Observation].Low;
			cur_rdg = 100 * cur_rdg
					/ (DisplayInfo[Observation].High
							- DisplayInfo[Observation].Low);

			dial0[dial] = (int) cur_rdg  ;

			/* old needle un-draw */
			if (dial1[dial] >= 0)
			{
				dial_draw_needle(dial1[dial]);
			}
			dial_draw_needle(dial0[dial]);
			// print value overlaid by needle
			// this is actual reading
			print_digits(20, 30, 5, dp_pos, int_rdg);
			font_gotoxy(0,0);
			font_digits(5,dp_pos,int_min);

			font_gotoxy(0,1);
			font_puts("Min");

			font_gotoxy(15,0);
			font_digits(5,dp_pos,int_max);
			font_gotoxy(18,1);
			font_puts("Max");

			dial1[dial] = dial0[dial];

			display();

		}
	}
	return ItemIndex;
}
/* USER CODE END 0 */

int main(void)
{

  /* USER CODE BEGIN 1 */

	GPIO_InitTypeDef GPIO_InitStruct;

	__HAL_RCC_SPI1_CLK_ENABLE()
	;
	__HAL_RCC_USART1_CLK_ENABLE()
	; // PLX main port
	__HAL_RCC_USART2_CLK_ENABLE()
	; // debug port
  /* 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_SPI1_Init();
  MX_USART2_UART_Init();
  MX_USART1_UART_Init();

  /* USER CODE BEGIN 2 */
	/* SPI bus AF pin selects */


  /* Turn on USART2 IRQ  */
	HAL_NVIC_SetPriority(USART2_IRQn, 4, 0);
	HAL_NVIC_EnableIRQ(USART2_IRQn);

	/* Turn on USART1 IRQ */
	HAL_NVIC_SetPriority(USART1_IRQn, 2, 0);
	HAL_NVIC_EnableIRQ(USART1_IRQn);

	/* setup the USART control blocks */
	init_usart_ctl(&uc1, huart1.Instance);
	init_usart_ctl(&uc2, huart2.Instance);

	EnableSerialRxInterrupt(&uc1);
	EnableSerialRxInterrupt(&uc2);
	/* Unlock the Flash to enable the flash control register access *************/
	HAL_FLASH_Unlock();

	EE_Init();



	int i;
	uint16_t rc;
	for(i=0;i<2;i++)
	{
	  uint16_t val;

	  uint16_t rc =  EE_ReadVariable(VirtAddVarTab[i], &val);

	  if (rc == 0)
	  {
		  dial_pos[i] = val;
	  }
	  else
	  {
		  break;
	  }
	}



	ap_init(); // set up the approximate math library

	int disp;

	ssd1306_begin(1, 0);
	dial_origin(64, 60);
	dial_size(60);


	// sort out the switch positions




	for (disp = 0; disp < 2; disp++)
	{
		select_display(disp);
		clearDisplay();
		dim(0);
		//font_puts(
		//		"Hello world !!\rThis text is a test of the text rendering library in a 5*7 font");

		dial_draw_scale(0, 10, 12, 5,1);
		char  buffer[] = "Display  ";
		buffer[8] = disp+'1';
		print_large_string(buffer, 20,30, 9);

		display();

	}


	InitSwitches();

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
	uint32_t Ticks = HAL_GetTick() + 100;


	// PLX decoder protocol
	char PLXPacket = 0;
	for (i = 0; i < MAXRDG; i++)
	{
		Max[i] = 0;
		Min[i] = 0xFFF; // 12 bit max value
	}

	int PLXPtr = 0;

	while (1)
	{
// poll switches
		HandleSwitches();




		uint16_t cc = SerialCharsReceived(&uc1);
		int chr;
		for (chr = 0; chr < cc; chr++)
		{
			char c = GetCharSerial(&uc1);
			if (c == PLX_Start) // at any time if the start byte appears, reset the pointers
			{
				PLXPtr = 0;    // reset the pointer
				PLXPacket = 1;
			}
			else if (c == PLX_Stop)
			{
				if (PLXPacket)
				{
					// we can now decode the selected parameter
					PLXItems = PLXPtr / sizeof(PLX_SensorInfo); // total
					// saturate the rotary switch position

					int DataVal;
					// process min/max
					for (i = 0; i < PLXItems; i++)
					{
						DataVal = ConvPLX(Data.Sensor[i].ReadingH,
								Data.Sensor[i].ReadingL);
						if (DataVal > Max[i])
						{
							Max[i] = DataVal;
						}
						if (DataVal < Min[i])
						{
							Min[i] = DataVal;
						}
					}

					// now to display the information
				    int suppress = DisplayCurrent(0,-1);
					DisplayCurrent(1, suppress);
				}
				PLXPtr = 0;
				PLXPacket = 0;
			}
			else if (c > PLX_Stop) // illegal char, restart reading
			{
				PLXPacket = 0;
				PLXPtr = 0;
			}
			else if (PLXPtr < sizeof(Data.Bytes))
			{
				Data.Bytes[PLXPtr++] = c;
			}
		}

		HAL_Delay(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_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
  RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
  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_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();
  }

  HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

  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)
{

  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_HIGH;
  hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
  hspi1.Init.NSS = SPI_NSS_SOFT;
  hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_8;
  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 = 19200;
  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();
  }

}

/* USART2 init function */
static void MX_USART2_UART_Init(void)
{

  huart2.Instance = USART2;
  huart2.Init.BaudRate = 115200;
  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();
  }

}

/** 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_GPIOD_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(SPI_NSS1_GPIO_Port, SPI_NSS1_Pin, GPIO_PIN_SET);

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(SPI1CD_GPIO_Port, SPI1CD_Pin, GPIO_PIN_RESET);

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOC, SPI_RESET_Pin|USART3_INVERT_Pin|USB_PWR_Pin, GPIO_PIN_RESET);

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(SPI_NSS2_GPIO_Port, SPI_NSS2_Pin, GPIO_PIN_SET);

  /*Configure GPIO pins : SPI_NSS1_Pin SPI1CD_Pin */
  GPIO_InitStruct.Pin = SPI_NSS1_Pin|SPI1CD_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pins : SPI_RESET_Pin SPI_NSS2_Pin USART3_INVERT_Pin USB_PWR_Pin */
  GPIO_InitStruct.Pin = SPI_RESET_Pin|SPI_NSS2_Pin|USART3_INVERT_Pin|USB_PWR_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

  /*Configure GPIO pins : SW1_PUSH_Pin SW1_I_Pin SW1_Q_Pin SW2_PUSH_Pin */
  GPIO_InitStruct.Pin = SW1_PUSH_Pin|SW1_I_Pin|SW1_Q_Pin|SW2_PUSH_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /*Configure GPIO pins : SW2_I_Pin SW2_Q_Pin */
  GPIO_InitStruct.Pin = SW2_I_Pin|SW2_Q_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  HAL_GPIO_Init(GPIOC, &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(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****/