seedvmp642_esambios.c

本程序是在CCS开发环境下

/********************************************************************/
/*  Copyright 2004 by SEED Incorporated.							*/
/*  All rights reserved. Property of SEED Incorporated.				*/
/*  Restricted rights to use, duplicate or disclose this code are	*/
/*  granted through contract.									    */
/*  															    */
/********************************************************************/
/*
 *---------SEEDVMP642_esambios.c---------
 * This example uses a timer to read and write the ESAM.
 */
#include <stdio.h>
#include <std.h>
#include <log.h>
#include <sys.h>
#include <mem.h>
#include <sio.h>
#include <csl.h>
#include <csl_cache.h>
#include <csl_timer.h>
#include <csl_irq.h>
#include <hwi.h>

#include "seeddm642.h"
#include "seeddm642_esam.h"
#include "SEEDVMP642_esambioscfg.h"

Uint8 buffer[100];
Bool NewDataFlag = FALSE;
Bool NextDataBit = FALSE;
Uint8 ReadFlag = 0;
Uint8 esambit =0;
Uint8 reciveCnt = 0;
Uint8 esamcheck;
Uint8 esamdata;

Uns oldmask;


Uint32 intcnt=0;
Uint32 Timerintcnt =0;

Uint32 cnt=0;
Bool cntfirst = FALSE; 

static Int TimerEventId1;
Int i;
extern far LOG_Obj trace;

Void main()
{
	
	LOG_printf(&trace, "Test Esam!");
	
}

Void ext4_isr()
{
	IRQ_disable(IRQ_EVT_EXTINT4);
	HWI_disable();
	IRQ_globalDisable();
	
	
	cntfirst = TRUE;
	NewDataFlag = TRUE;
	intcnt++;

	
	TimerEventId1 = TIMER_getEventId(hTimer1);
	IRQ_reset(TimerEventId1);	
    IRQ_enable(TimerEventId1);
    TIMER_start(hTimer1);
    return;
	
}

Void timer_isr()
{
	Timerintcnt++;
	
	if(cntfirst == TRUE)
		{
			cnt++;
			if(cnt ==3)
			{
				NextDataBit = TRUE;
				cntfirst = FALSE;
				cnt= 0;
			}	
		}
		else
		{
			cnt++;
			if(cnt == 2)
			{
				cnt = 0;
				NextDataBit = TRUE;
			}  
		}
		

}

Void GetEsamDataTsk()
{
	/* Reset ESAM */
	SEEDDM642_rset(SEEDDM642_ESAMW, 0x0);
	SEEDDM642_waitusec(10000);
	SEEDDM642_rset(SEEDDM642_ESAMW, 0x4);

	IRQ_reset(IRQ_EVT_EXTINT4);
    IRQ_enable(IRQ_EVT_EXTINT4);

    
    do//无数据接收到，继续等待
	{
		ReadFlag =  seeddm642_esam_read((Uint32)(&buffer),(Uint32)(&reciveCnt));
	}while(ReadFlag == 1);
	for(i = 0;i<reciveCnt;i++)
	{
		LOG_printf(&trace,"recieve data is : 0x%x\n",buffer[i]);
	}
	
	for(;;)
	{

	}


}

int seeddm642_esam_read(Uint32 src, Uint32 length )
{
	Uint8 *pdst;
	Uint8 *plength;
	Uint8 esamdata = 0;
	Uint8 esambit  = 0;
	Uint8 esamcheck = 0;
	Uint8 esamcount =0;
    Uint32 i;
    Uint32 n= 0;
    Uint32 esamCnt =0;
    
    /* Establish ricieve pointer */
    pdst = (Uint8 *)src;
    plength = (Uint8 *)length;
    *plength = 0;
    //打开中断
	IRQ_enable(IRQ_EVT_EXTINT4);
	//将IO口配置成为输入模式
	SEEDDM642_rset(SEEDDM642_ESAMW, 0x4);
	//如果读取标志置1，读取数据的一个BIT,共读9次，拼成一个字节
	//第九个BIT为偶较验位
	while(1)
	{
		if(NewDataFlag == FALSE)
		{
			//超时即数据接收完成，再无新数据产生
			n++;
			if(n == 1000)
			{
				n = 0;
				esamCnt++;
			}		
			if(esamCnt == 300)
			{
				esamCnt = 0;
				if(esamcount ==0)
				{
					return 1;//无数据接收到
				}
				else
				{
					*plength = esamcount;
					return 2;
				}
			} 
		}
		else
		{
			//有新数据的产生，启动计数器
			NewDataFlag = FALSE;
			IRQ_disable(IRQ_EVT_EXTINT4);			
			//记数重新开始
			esamCnt = 0;
			for(i = 0;i<8;i++)
			{
				while(NextDataBit == FALSE){}
				NextDataBit = FALSE;
				esambit = SEEDDM642_rget(SEEDDM642_ESAMR);
				esamcheck = esamcheck + (esambit & 0x1);
				esamdata = esamdata + ((esambit & 0x1)<<i);
			}
			/*读较验位*/
			while(NextDataBit == FALSE){}
			NextDataBit = FALSE;
			esambit = SEEDDM642_rget(SEEDDM642_ESAMR);
			esamcheck = esamcheck + (esambit & 0x1);

			if((esamcheck & 0x1) == 1)
			{           
				*plength = esamcount;
				TIMER_pause(hTimer1);
				return 0;
			}           
			*pdst++ = esamdata;
			esamcount++;
			esamdata = 0;
			esamcheck = 0;
			esambit = 0;
			//停止计数器
			TIMER_pause(hTimer1);

			//打开中断
			IRQ_reset(IRQ_EVT_EXTINT4);
			IRQ_enable(IRQ_EVT_EXTINT4);

		}			
	}		
}