view OtherSources/data_exchange_main_mini.c @ 466:538eb1c976e9 Improve_Logtansfer

Removed invalidate header function because it is no lonnger needed Added new function allowing to read the profile length from sample data Added function which validates the wrap around detection In older versions a corruption of the sample index could occure reseting the sample index to its start. For some code sections this looks like a wrap around of the sample ring. To avoid problems a function to check this by reading the last bytes of the sample ring (should be != 0xff if used) has been added
author ideenmodellierer
date Tue, 14 Apr 2020 19:27:04 +0200
parents 7801c5d8a562
children
line wrap: on
line source

/**
  ******************************************************************************
  * @file    data_exchange_main.c
  * @author  heinrichs weikamp gmbh
  * @date    13-Oct-2014
  * @version V0.0.2
  * @since   27-May-2015

	* @brief   Communication with the second CPU == RTE system
  *
  @verbatim
  ==============================================================================
                        ##### How to use #####
  ==============================================================================

  ==============================================================================
                        ##### Device Data #####
  ==============================================================================
	
	main CPU always sends the device data info that it has at the moment

		on start it is INT32_MIN, INT32_MAX and 0 
		as initialized  in data_central.c variable declaration
	
	second small CPU gets request to send its device data
		
		on receiption the data is merged with the data in externLogbookFlash,
		stored on the externLogbookFlash and from now on send to small CPU

	@endverbatim
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT(c) 2014 heinrichs weikamp</center></h2>
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include <string.h> // for memcopy
#include "stm32f4xx_hal.h"
#include "stdio.h"
#include "ostc.h"
#include "data_central.h"
#include "data_exchange_main.h"
#include "base.h"
#include "externLogbookFlash.h"


/* Expoted variables --------------------------------------------------------*/

/* Private variables ---------------------------------------------------------*/

SDataReceiveFromMaster dataOut;
SDataExchangeSlaveToMaster dataIn;

uint8_t data_old__lost_connection_to_slave_counter_temp = 0;
/* Private types -------------------------------------------------------------*/

uint8_t DataEX_check_header_and_footer_ok(void);
void DataEX_control_connection_while_asking_for_sleep(void);

/* Exported functions --------------------------------------------------------*/

uint8_t DataEX_call(void)
{
	DataEX_control_connection_while_asking_for_sleep();
	
	for(int i=0;i<EXCHANGE_BUFFERSIZE;i++)
		*(uint8_t *)(((uint32_t)&dataOut) + i)  = 0;

	dataOut.mode = MODE_SHUTDOWN;

	dataOut.header.checkCode[0] = 0xBB;
	dataOut.header.checkCode[1] = 0x01;
	dataOut.header.checkCode[2] = 0x01;
	dataOut.header.checkCode[3] = 0xBB;

	dataOut.footer.checkCode[0] = 0xF4;
	dataOut.footer.checkCode[1] = 0xF3;
	dataOut.footer.checkCode[2] = 0xF2;
	dataOut.footer.checkCode[3] = 0xF1;

	HAL_GPIO_WritePin(SMALLCPU_CSB_GPIO_PORT,SMALLCPU_CSB_PIN,GPIO_PIN_SET);
	delayMicros(10);

	if(data_old__lost_connection_to_slave_counter_temp >= 3)
	{
		data_old__lost_connection_to_slave_counter_temp = 0;
	}
	else
	{
		HAL_GPIO_WritePin(SMALLCPU_CSB_GPIO_PORT,SMALLCPU_CSB_PIN,GPIO_PIN_RESET);
	}

	HAL_SPI_TransmitReceive_DMA(&cpu2DmaSpi, (uint8_t *)&dataOut, (uint8_t *)&dataIn, EXCHANGE_BUFFERSIZE+1);
	return 1;
}


void DataEX_control_connection_while_asking_for_sleep(void)
{
 	if(!DataEX_check_header_and_footer_ok())
	{
		data_old__lost_connection_to_slave_counter_temp += 1;
	}
}

uint8_t DataEX_check_header_and_footer_ok(void)
{
	if(dataIn.header.checkCode[0] != 0xA1)
		return 0;
	if(dataIn.header.checkCode[1] != 0xA2)
		return 0;
	if(dataIn.header.checkCode[2] != 0xA3)
		return 0;
	if(dataIn.header.checkCode[3] != 0xA4)
		return 0;
	if(dataIn.footer.checkCode[0] != 0xE1)
		return 0;
	if(dataIn.footer.checkCode[1] != 0xE2)
		return 0;
	if(dataIn.footer.checkCode[2] != 0xE3)
		return 0;
	if(dataIn.footer.checkCode[3] != 0xE4)
		return 0;

	return 1;
}