main.c

此程序为DP256的SPI实验程序,已经通过实验证明

#include "LIN_Header.h"
void PowerON(void);
/*
SPI Communication Module Test Project
2005-07-07
Wang Junpeng
Update date: 2005 - 07 -11
Author: Wang junpeng
Contents: use interrupt method to reliaze spi communication
	1. function SPI_Enable's parameters is modified to SPI_ENABLE, MC33993_INT_ENABLE
	2. modified main function's state machine
	3. spi communication timeout state checked in main funciton
Update 2005 - 07 - 12
Author: Wang junpeng
Contents: 
	1. switch state debounce and signal conversion process moved out from the spi data receiving process	
	2. Add sci communication in the single mcu process by call LIN_Send funciton
*/
void main(void) 
{
	L_U16	wTime;
	PowerON();
#if LIN_DEBUG_MODE == 1	
	LIN_TEST_PIN_IC_MASK	= 1;
	LIN_TEST_PIN_SCI_MASK	= 1;
	LIN_TEST_PIN_IC			= 0;
	LIN_TEST_PIN_SCI		= 0;
	LIN_Debug_PIN_BREAK_MASK	= 1;
	LIN_Debug_PIN_SYNCH_MASK	= 1;
	LIN_Debug_PIN_ID_MASK		= 1;
	LIN_Debug_PIN_DATA_MASK		= 1;
	LIN_Debug_PIN_CHECK_MASK	= 1;
	LIN_Debug_PIN_BREAK		= 0;
	LIN_Debug_PIN_SYNCH		= 0;
	LIN_Debug_PIN_ID		= 0;
	LIN_Debug_PIN_DATA		= 0;
	LIN_Debug_PIN_CHECK		= 0;
#endif
	CmbSwt_Init();
		
	SPI_Init();
	

	LIN_Sys_Init();
	LIN_Connect();
	
	MC33993_stInitialized	= MC33993_INIT_NONE;
	wTime	= LIN_GetCurrentTime();

	SPI_Enable(SPI_ENABLE, SPI_INT_SEL);	
	while(1)
	{
		//MC33993_SG_Wet(nSGLSetting,nSGHSetting);
		//1. we are waiting for MC33993's data	

	
   		 if(SPIBuf.mState != SPI_XMT_IDLE) 
   		 {
   		 	//1.1 Check MC33993 Communication status
			if(LIN_CheckTimeOut(SPIBuf.mTimer, LIN_GetCurrentTime(), SPI_ERR_TIMEOUT)) 	
			{
				//1.1.1 MC33993 communicating timeout
				//Clear all tx/rx flag & error flag
				//SPIBuf.mState 	|= SPI_ERR_NORESPONSE;
				//SPIBuf.mState 	&= ~SPI_RX_REQ;
				//SPIBuf.mState 	&= ~SPI_TX_REQ;
				SPCR_SPTIE	= 0;
				Select_MC33993(MC33993_DESEL);
				SPIBuf.mState	= SPI_XMT_IDLE;   			
				//1.1.2 should we reset MC33993? No. we can't communicate with MC33993
				//		so all the command we send out are invalid.
				//KeyBoard_INT_Enable(); 
			}			
   		}
//  		else if((SPIBuf.mState & SPI_OVRF) == SPI_OVRF) 
//		{
//			SPIBuf.mState	= SPI_XMT_IDLE;   				
//			SPCR_SPTIE	= 0;
//			Select_MC33993(MC33993_DESEL);
//		}
	
   		//2. data received by spi, this can be move to SPI_Rx_Indicator
   		//else if((SPIBuf.mState & SPI_RX_FULL) == SPI_RX_FULL) 
   		//{//this condition was not occured
			//TEST_PIN_SG8	= ~TEST_PIN_SG8;
				
			//MC33993_Data_Processing();
			//1. all data are received, do extract work now.
			//MC33993_Data_Received();
			
			//2. Clear spibuf state
			//SPIBuf.mState	= SPI_XMT_IDLE;   			
			
			//3. add sci debug code, send spi data through sci interface
			//LIN_SendData(SPI_Rx_Buf[MC33993_DATA_LOW]);
   		//}
		
		//3. should we start debounce work here ? No. we should start debounce in the main loop
		
		//4. should we start signal conversion process here? No. we should start signal conversion in the main loop
		
		//set test pin to see what we got 
		TEST_PIN_SG7	= SW_TurnRight;	
   		
   		//5. switch state sample phase should be less the debounce time
   		// 	 switch state debounce time is 20 ms
   		//   so we sample switch status every 10 ms 
		if(LIN_CheckTimeOut(wTime, LIN_GetCurrentTime(), 10))		
		{
			wTime	= LIN_GetCurrentTime();
			TEST_PIN_SG0	= ~TEST_PIN_SG0;
			//5.1 MC33993 communication is in idle state?
			if(SPIBuf.mState == SPI_XMT_IDLE) 
			{
				//5.1.1 update currenttime
//				wTime	= LIN_GetCurrentTime();
				
//				//5.1.2 Start spi communication with MC33993
				TEST_PIN_SG1	= 1;
				MC33993_GetInput();//this sentence was executed					
			}
		}
#if SPI_DEBUG_MODE	== 1
//		SPI_Debug();
#endif	
			
	}
	
	//The Following Code about LINs Add
	//-----------------------------------------------------------------------------
	KeyBoard_Init();
	//-----------------------------------------------------------------------------
	KeyBoard_INT_Enable();
}

void PowerON(void)
{
	CONFIG2	= CFG2_OSCENINSTOP ;//+ CFG2_ESCIBDSRC;
			  //1. Disable MSCAN08
			  //2. Disables extra divide-by-128 prescaler in timebase module
			  //3. OSC Enabled in STOP Mode
			  //4. ESCI use internal Data bus clock?External OSC Clock
	CONFIG1	= CFG1_COPRS + CFG1_LVIPWRD + CFG1_LVI5OR3 + CFG1_STOP + CFG1_COPD;
			  //1. timeout period = 2^13 - 2 ^ 4 COPCLK cycles 
			  //2. LVI disabled during stop mode
			  //3. LVI module resets enabled
			  //4. LVI module power Disabled
			  //5. LVI operates in 5-V mode
			  //6. Stop mode recovery after 4096 CGMXCLCK cycles
			  //7. STOP instruction enabled
			  //8. COP module disabled
}