--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Small_CPU/Src/spi.c	Sat Apr 28 11:52:34 2018 +0200
@@ -0,0 +1,435 @@
+/**
+  ******************************************************************************
+  * @file    spi.c 
+  * @author  heinrichs weikamp gmbh
+  * @version V0.0.1
+  * @date    16-Sept-2014
+  * @brief   Source code for spi control
+  *           
+  @verbatim                 
+  ============================================================================== 
+                        ##### How to use #####
+  ============================================================================== 
+  @endverbatim
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT(c) 2014 heinrichs weikamp</center></h2>
+  *
+  ******************************************************************************
+  */ 
+
+/* Includes ------------------------------------------------------------------*/
+#include "spi.h"
+//#include "gpio.h"
+
+/* USER CODE BEGIN 0 */
+#include "scheduler.h"
+
+extern void GPIO_new_DEBUG_LOW(void);
+extern void GPIO_new_DEBUG_HIGH(void);
+
+
+uint8_t	data_error = 0;
+uint32_t	data_error_time = 0;
+
+static void SPI_Error_Handler(void);
+
+/* USER CODE END 0 */
+
+static uint8_t SPI_check_header_and_footer_ok(void);
+
+SPI_HandleTypeDef hspi1;
+SPI_HandleTypeDef hspi3;
+
+DMA_HandleTypeDef hdma_tx;
+DMA_HandleTypeDef hdma_rx;
+
+// SPI3 init function
+void MX_SPI3_Init(void)
+{
+  hspi3.Instance 								= SPI3;
+  hspi3.Init.Mode 							= SPI_MODE_MASTER;
+  hspi3.Init.Direction 					= SPI_DIRECTION_2LINES;
+  hspi3.Init.DataSize 					= SPI_DATASIZE_8BIT;
+  hspi3.Init.CLKPolarity 				= SPI_POLARITY_HIGH;
+  hspi3.Init.CLKPhase 					= SPI_PHASE_1EDGE;
+  hspi3.Init.NSS 								= SPI_NSS_SOFT;
+  hspi3.Init.BaudRatePrescaler	= SPI_BAUDRATEPRESCALER_256;
+  hspi3.Init.FirstBit 					= SPI_FIRSTBIT_MSB;
+  hspi3.Init.TIMode 						= SPI_TIMODE_DISABLED;
+  hspi3.Init.CRCCalculation 		= SPI_CRCCALCULATION_DISABLED;
+  hspi3.Init.CRCPolynomial			= 7;
+  HAL_SPI_Init(&hspi3);
+}
+
+void MX_SPI3_DeInit(void)
+{
+  HAL_SPI_DeInit(&hspi3);
+}
+
+uint8_t SPI3_ButtonAdjust(uint8_t *arrayInput, uint8_t *arrayOutput)
+{
+	HAL_StatusTypeDef status;
+	uint8_t answer[10];
+	uint8_t rework[10];
+	uint8_t wait = 0;
+
+	rework[0] = 0xFF;
+	for(int i = 0; i < 3; i++)
+	{
+		// limiter
+		if(arrayInput[i] == 0xFF)
+			arrayInput[i] = 0xFE;
+		if(arrayInput[i] >= 15)
+		{
+			// copy - auslöse-schwelle
+			rework[i+1] = arrayInput[i];
+			// wieder-scharf-schalte-schwelle
+			rework[i+3+1] = arrayInput[i] - 10;
+		}
+		else
+		if(arrayInput[i] >= 10)
+		{
+			// copy - auslöse-schwelle
+			rework[i+1] = arrayInput[i];
+			// wieder-scharf-schalte-schwelle
+			rework[i+3+1] = arrayInput[i] - 5;
+		}
+		else
+		{
+			// copy - auslöse-schwelle
+			rework[i+1] = 7;
+			// wieder-scharf-schalte-schwelle
+			rework[i+3+1] = 6;
+		}
+	}
+
+	status = HAL_OK; /* = 0 */
+	HAL_GPIO_WritePin(GPIOC, GPIO_PIN_9,GPIO_PIN_SET);
+	for(int i=0;i<7;i++)
+	{
+		for(int iiii = 0; iiii < 400; iiii++)
+			wait++;
+		HAL_GPIO_WritePin(GPIOC, GPIO_PIN_9,GPIO_PIN_RESET);
+		for(int iiii = 0; iiii < 400; iiii++)
+			wait++;
+		status += HAL_SPI_TransmitReceive(&hspi3, &rework[i], &answer[i], 1,20);
+		for(int iiii = 0; iiii < 400; iiii++)
+			wait++;
+		HAL_GPIO_WritePin(GPIOC, GPIO_PIN_9,GPIO_PIN_SET);
+	}
+	
+	if(status == HAL_OK)
+	{
+		for(int i = 0; i < 3; i++)
+		{
+			arrayOutput[i] = answer[i+2]; // first not, return of 0xFF not
+		}	
+		return 1;
+	}
+	else
+		
+		return 0;
+}
+
+
+// SPI5 init function
+void MX_SPI1_Init(void)
+{
+  hspi1.Instance 								= SPI1;
+  hspi1.Init.Mode 							= SPI_MODE_SLAVE;
+  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_HARD_INPUT;//SPI_NSS_SOFT;
+  hspi1.Init.BaudRatePrescaler	= SPI_BAUDRATEPRESCALER_128;
+  hspi1.Init.FirstBit 					= SPI_FIRSTBIT_MSB;
+  hspi1.Init.TIMode 						= SPI_TIMODE_DISABLED;
+  hspi1.Init.CRCCalculation 		= SPI_CRCCALCULATION_DISABLED;//_DISABLED; _ENABLED;
+  hspi1.Init.CRCPolynomial			= 7;
+  HAL_SPI_Init(&hspi1);
+}
+
+void MX_SPI_DeInit(void)
+{
+  HAL_SPI_DeInit(&hspi1);
+}
+
+
+void HAL_SPI_MspInit(SPI_HandleTypeDef* hspi)
+{
+
+  GPIO_InitTypeDef GPIO_InitStruct;
+
+  if(hspi->Instance==SPI1)
+  {
+    // Peripheral clock enable
+    __SPI1_CLK_ENABLE();
+    __GPIOA_CLK_ENABLE();
+		//SPI1 GPIO Configuration  
+		//PA4   ------> SPI1_CS 
+		//PA5   ------> SPI1_SCK
+		//PA6   ------> SPI1_MISO 
+		//PA7   ------> SPI1_MOSI 
+		
+    GPIO_InitStruct.Pin = GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7;
+//    GPIO_InitStruct.Pin = GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7;
+    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+    GPIO_InitStruct.Pull = GPIO_PULLUP;
+    GPIO_InitStruct.Speed = GPIO_SPEED_MEDIUM;
+    GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
+    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+		//##-3- Configure the DMA streams ##########################################
+		// Configure the DMA handler for Transmission process 
+		hdma_tx.Instance                 = DMA2_Stream3;
+		hdma_tx.Init.Channel             = DMA_CHANNEL_3;
+		hdma_tx.Init.Direction           = DMA_MEMORY_TO_PERIPH;
+		hdma_tx.Init.PeriphInc           = DMA_PINC_DISABLE;
+		hdma_tx.Init.MemInc              = DMA_MINC_ENABLE;
+		hdma_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
+		hdma_tx.Init.MemDataAlignment    = DMA_MDATAALIGN_BYTE;
+		hdma_tx.Init.Mode                = DMA_NORMAL;
+		hdma_tx.Init.Priority            = DMA_PRIORITY_LOW;
+		hdma_tx.Init.FIFOMode            = DMA_FIFOMODE_DISABLE;         
+		hdma_tx.Init.FIFOThreshold       = DMA_FIFO_THRESHOLD_FULL;
+		hdma_tx.Init.MemBurst            = DMA_MBURST_INC4;
+		hdma_tx.Init.PeriphBurst         = DMA_PBURST_INC4;
+		
+		HAL_DMA_Init(&hdma_tx);   
+		
+		// Associate the initialized DMA handle to the the SPI handle
+		__HAL_LINKDMA(hspi, hdmatx, hdma_tx);
+			
+		// Configure the DMA handler for Transmission process
+		hdma_rx.Instance                 = DMA2_Stream0;
+		hdma_rx.Init.Channel             = DMA_CHANNEL_3;
+		hdma_rx.Init.Direction           = DMA_PERIPH_TO_MEMORY;
+		hdma_rx.Init.PeriphInc           = DMA_PINC_DISABLE;
+		hdma_rx.Init.MemInc              = DMA_MINC_ENABLE;
+		hdma_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
+		hdma_rx.Init.MemDataAlignment    = DMA_MDATAALIGN_BYTE;
+		hdma_rx.Init.Mode                = DMA_NORMAL;
+		hdma_rx.Init.Priority            = DMA_PRIORITY_HIGH;
+		hdma_rx.Init.FIFOMode            = DMA_FIFOMODE_DISABLE;         
+		hdma_rx.Init.FIFOThreshold       = DMA_FIFO_THRESHOLD_FULL;
+		hdma_rx.Init.MemBurst            = DMA_MBURST_INC4;
+		hdma_rx.Init.PeriphBurst         = DMA_PBURST_INC4; 
+
+		HAL_DMA_Init(&hdma_rx);
+    
+  // Associate the initialized DMA handle to the the SPI handle
+  __HAL_LINKDMA(hspi, hdmarx, hdma_rx);
+    
+  //##-4- Configure the NVIC for DMA #########################################
+  //NVIC configuration for DMA transfer complete interrupt (SPI3_RX)
+  HAL_NVIC_SetPriority(DMA2_Stream0_IRQn, 1, 0);   
+  HAL_NVIC_EnableIRQ(DMA2_Stream0_IRQn);
+
+	// NVIC configuration for DMA transfer complete interrupt (SPI1_TX)
+  HAL_NVIC_SetPriority(DMA2_Stream3_IRQn, 1, 1);
+  HAL_NVIC_EnableIRQ(DMA2_Stream3_IRQn);
+	}
+	else
+  if(hspi->Instance==SPI3)
+  {
+    __GPIOC_CLK_ENABLE();
+    __SPI3_CLK_ENABLE();
+
+		//SPI1 GPIO Configuration  
+		//PC10   ------> SPI3_SCK
+		//PC11   ------> SPI3_MISO 
+		//PC12   ------> SPI3_MOSI 
+		//PA15   ------> SPI3_NSS (official)
+		//PC9    ------> SPI3_NSS (hw)
+		
+    GPIO_InitStruct.Pin = GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12;
+    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+    GPIO_InitStruct.Pull = GPIO_PULLUP;
+    GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
+    GPIO_InitStruct.Alternate = GPIO_AF6_SPI3;
+    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
+
+		GPIO_InitStruct.Pin = GPIO_PIN_9;
+		GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+		GPIO_InitStruct.Pull = GPIO_PULLUP;
+		GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
+		HAL_GPIO_Init(GPIOC, &GPIO_InitStruct); 
+
+		HAL_GPIO_WritePin(GPIOC, GPIO_PIN_9,GPIO_PIN_SET);
+	}
+}
+
+void HAL_SPI_MspDeInit(SPI_HandleTypeDef* hspi){
+  if(hspi->Instance==SPI1)
+  {
+		__SPI1_FORCE_RESET();
+		__SPI1_RELEASE_RESET();
+
+		//SPI1 GPIO Configuration  
+		//PA5   ------> SPI1_SCK
+		//PA6   ------> SPI1_MISO 
+		//PA7   ------> SPI1_MOSI 
+		
+			HAL_GPIO_DeInit(GPIOA, GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7);
+
+		HAL_DMA_DeInit(&hdma_tx);
+		HAL_DMA_DeInit(&hdma_rx);
+		
+		HAL_NVIC_DisableIRQ(DMA2_Stream3_IRQn);
+		HAL_NVIC_DisableIRQ(DMA2_Stream0_IRQn);
+	}
+	else
+  if(hspi->Instance==SPI3)
+  {
+		__SPI3_FORCE_RESET();
+		__SPI3_RELEASE_RESET();
+
+		//SPI1 GPIO Configuration  
+		//PC10   ------> SPI3_SCK
+		//PC11   ------> SPI3_MISO 
+		//PC12   ------> SPI3_MOSI 
+		//PA15   ------> SPI3_NSS (official)
+		//PC9    ------> SPI3_NSS (hw)
+		HAL_GPIO_DeInit(GPIOC, GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12);
+	}
+}
+
+void SPI_synchronize_with_Master(void)
+{
+  GPIO_InitTypeDef GPIO_InitStruct;
+
+		__GPIOA_CLK_ENABLE();
+	/**SPI1 GPIO Configuration  
+	PA5   ------> SPI1_SCK
+	*/
+	GPIO_InitStruct.Pin = GPIO_PIN_4|GPIO_PIN_5;
+	GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
+	GPIO_InitStruct.Pull = GPIO_PULLUP;
+	GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
+	HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+	HAL_Delay(10);
+	while(HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_4) == 0);
+	HAL_Delay(10);
+	while(HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_5) == 1);
+	HAL_Delay(50);
+}
+
+
+void SPI_Start_single_TxRx_with_Master(void)
+{
+	uint8_t * pOutput;
+
+	if(global.dataSendToSlave.getDeviceDataNow)
+	{
+		global.dataSendToSlave.getDeviceDataNow = 0;
+		pOutput = (uint8_t*)&(global.deviceDataSendToMaster);
+	}
+	else
+	{
+		pOutput = (uint8_t*)&(global.dataSendToMaster);
+	}
+
+	if(HAL_SPI_TransmitReceive_DMA(&hspi1,pOutput, (uint8_t*)&(global.dataSendToSlave), EXCHANGE_BUFFERSIZE+1) != HAL_OK)
+	{
+		// Transfer error in transmission process 
+		SPI_Error_Handler();
+	}
+}
+
+
+void HAL_SPI_TxRxCpltCallback(SPI_HandleTypeDef *hspi)
+{
+	global.check_sync_not_running = 0;
+	/* stop data exchange? */
+	if(global.mode == MODE_SHUTDOWN)
+	{
+		global.mode = MODE_SLEEP;
+		global.dataSendToSlavePending = 0;
+		global.dataSendToSlaveIsValid = 1;
+		global.dataSendToSlaveIsNotValidCount = 0;
+		return;
+	}
+	
+	/* data consistent? */
+	if(SPI_check_header_and_footer_ok())
+	{
+		GPIO_new_DEBUG_HIGH();
+		global.dataSendToSlaveIsValid = 1;
+		global.dataSendToSlaveIsNotValidCount = 0;
+	}
+	else
+	{
+		GPIO_new_DEBUG_LOW();
+		global.dataSendToSlaveIsValid = 0;
+		global.dataSendToSlaveIsNotValidCount++;
+	}
+	global.dataSendToMaster.power_on_reset = 0;
+	global.deviceDataSendToMaster.power_on_reset = 0;
+	/* no i2c or other time critical threads? */
+	if(global.dataSendToSlaveIsValid)
+	{
+		if(!global.dataSendToSlaveStopEval)
+		{
+			scheduleSpecial_Evaluate_DataSendToSlave();
+		}
+		else
+		{
+			global.dataSendToSlavePending = 1;
+		}
+	}
+	else
+	{
+		global.dataSendToSlavePending = 0;
+	}
+	
+	/* restart SPI */
+	if(hspi == &hspi1)
+	{
+		if(global.dataSendToSlaveIsValid)
+			SPI_Start_single_TxRx_with_Master();
+	}
+}
+
+
+static uint8_t SPI_check_header_and_footer_ok(void)
+{
+	if(global.dataSendToSlave.header.checkCode[0] != 0xBB)
+		return 0;
+	if(global.dataSendToSlave.header.checkCode[1] != 0x01)
+		return 0;
+	if(global.dataSendToSlave.header.checkCode[2] != 0x01)
+		return 0;
+	if(global.dataSendToSlave.header.checkCode[3] != 0xBB)
+		return 0;
+	if(global.dataSendToSlave.footer.checkCode[0] != 0xF4)
+		return 0;
+	if(global.dataSendToSlave.footer.checkCode[1] != 0xF3)
+		return 0;
+	if(global.dataSendToSlave.footer.checkCode[2] != 0xF2)
+		return 0;
+	if(global.dataSendToSlave.footer.checkCode[3] != 0xF1)
+		return 0;
+
+	return 1;
+}
+
+static void SPI_Error_Handler(void)
+{
+  while(1)
+  {
+  }
+}
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/