/**+
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  ******************************************************************************+
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  * @file    data_exchange_main.c+
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  * @author  heinrichs weikamp gmbh+
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  * @date    13-Oct-2014+
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  * @version V0.0.2+
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  * @since   27-May-2015+
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+
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	* @brief   Communication with the second CPU == RTE system+
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  *+
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  @verbatim+
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  ==============================================================================+
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                        ##### How to use #####+
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  ==============================================================================+
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+
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  ==============================================================================+
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                        ##### Device Data #####+
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  ==============================================================================+
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	+
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	main CPU always sends the device data info that it has at the moment+
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+
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		on start it is INT32_MIN, INT32_MAX and 0 +
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		as initialized  in data_central.c variable declaration+
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	+
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	second small CPU gets request to send its device data+
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		+
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		on receiption the data is merged with the data in externLogbookFlash,+
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		stored on the externLogbookFlash and from now on send to small CPU+
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+
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	@endverbatim+
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  ******************************************************************************+
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  * @attention+
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  *+
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  * <h2><center>&copy; COPYRIGHT(c) 2014 heinrichs weikamp</center></h2>+
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  *+
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  ******************************************************************************+
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  */+
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+
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/* Includes ------------------------------------------------------------------*/+
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#include <string.h> // for memcopy+
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#include "stm32f4xx_hal.h"+
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#include "stdio.h"+
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#include "ostc.h"+
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#include "data_central.h"+
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#include "data_exchange_main.h"+
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#include "base.h"+
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#include "externLogbookFlash.h"+
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+
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+
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/* Expoted variables --------------------------------------------------------*/+
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+
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/* Private variables ---------------------------------------------------------*/+
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+
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SDataReceiveFromMaster dataOut;+
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SDataExchangeSlaveToMaster dataIn;+
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+
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uint8_t data_old__lost_connection_to_slave_counter_temp = 0;+
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/* Private types -------------------------------------------------------------*/+
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+
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uint8_t DataEX_check_header_and_footer_ok(void);+
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void DataEX_control_connection_while_asking_for_sleep(void);+
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+
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/* Exported functions --------------------------------------------------------*/+
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+
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uint8_t DataEX_call(void)+
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{+
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	DataEX_control_connection_while_asking_for_sleep();+
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	+
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	for(int i=0;i<EXCHANGE_BUFFERSIZE;i++)+
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		*(uint8_t *)(((uint32_t)&dataOut) + i)  = 0;+
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+
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	dataOut.mode = MODE_SHUTDOWN;+
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+
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	dataOut.header.checkCode[0] = 0xBB;+
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	dataOut.header.checkCode[1] = 0x01;+
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	dataOut.header.checkCode[2] = 0x01;+
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	dataOut.header.checkCode[3] = 0xBB;+
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+
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	dataOut.footer.checkCode[0] = 0xF4;+
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	dataOut.footer.checkCode[1] = 0xF3;+
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	dataOut.footer.checkCode[2] = 0xF2;+
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	dataOut.footer.checkCode[3] = 0xF1;+
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+
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	HAL_GPIO_WritePin(SMALLCPU_CSB_GPIO_PORT,SMALLCPU_CSB_PIN,GPIO_PIN_SET);+
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	delayMicros(10);+
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+
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	if(data_old__lost_connection_to_slave_counter_temp >= 3)+
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	{+
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		data_old__lost_connection_to_slave_counter_temp = 0;+
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	}+
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	else+
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	{+
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		HAL_GPIO_WritePin(SMALLCPU_CSB_GPIO_PORT,SMALLCPU_CSB_PIN,GPIO_PIN_RESET);+
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	}+
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+
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	HAL_SPI_TransmitReceive_DMA(&cpu2DmaSpi, (uint8_t *)&dataOut, (uint8_t *)&dataIn, EXCHANGE_BUFFERSIZE+1);+
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	return 1;+
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}+
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+
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+
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void DataEX_control_connection_while_asking_for_sleep(void)+
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{+
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 	if(!DataEX_check_header_and_footer_ok())+
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	{+
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		data_old__lost_connection_to_slave_counter_temp += 1;+
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	}+
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}+
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+
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uint8_t DataEX_check_header_and_footer_ok(void)+
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{+
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	if(dataIn.header.checkCode[0] != 0xA1)+
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		return 0;+
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	if(dataIn.header.checkCode[1] != 0xA2)+
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		return 0;+
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	if(dataIn.header.checkCode[2] != 0xA3)+
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		return 0;+
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	if(dataIn.header.checkCode[3] != 0xA4)+
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		return 0;+
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	if(dataIn.footer.checkCode[0] != 0xE1)+
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		return 0;+
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	if(dataIn.footer.checkCode[1] != 0xE2)+
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		return 0;+
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	if(dataIn.footer.checkCode[2] != 0xE3)+
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		return 0;+
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	if(dataIn.footer.checkCode[3] != 0xE4)+
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		return 0;+
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+
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	return 1;+
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}+
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+
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