wfunlib.c

44b0迷你boot

/**************************************************************************
NAME:WFUNLIB.C
copyright:wzz at Qingdao University  2008
**************************************************************************/

#include "..\inc\WOPTIONS.h"
/**************************************************************************************************/
void Port_Init(void)//add by eric rong
{
	//CAUTION:Follow the configuration order for setting the ports. 
	// 1) setting value 
	 // 2) setting control register 
	 // 3) configure pull-up resistor.  

	//16bit data bus configuration  

	// PORT A GROUP
	/*  BIT 9		8		7		6		5		4		3		2		1		0            */
	/*  ADDR24	ADDR23	ADDR22	ADDR21	ADDR20	ADDR19	ADDR18	ADDR17	ADDR16	ADDR0   */	      
	/*  1,			1,		1,          1,           1,      1,                 1,          1,          1,           1           */
	rPCONA = 0x3ff;

	// PORT B GROUP
	/*	BIT 10	9		8		7		6		5		4		3		2		1		0*/
	/*    /CS5	/CS4	/CS3	/CS2	/CS1	nWBE3	nWBE2	/SRAS	/SCAS	SCLK	SCKE*/
	/*	rtl8019	(Reserve)(Reserve)FLASH	D12 		Out		Out		Sdram	Sdram	Sdram	Sdram*/
	/*      1,        1,		1,		1,		1,		0,		0,		1,		1,		1,		1*/
	rPDATB = 0x7ff;
	rPCONB = 0x7cf;
    
	//PORT C GROUP
	//BUSWIDTH=16*/
	/*  PC    15		14		13		12		11		10		9		8                       */
	/*          O		O		RXD1	TXD1	O		O		O		O*/
	/*          Nand-CE	UDA-CE	Uart1	Uart1	NandCLE	NandALE	L3DATA	L3CLK*/
	/*          01		01		11		11		01		01		01		01		*/

	/*  PC	7		6		5		4		3		2		1		0*/
	/*		O		O		O		I		IISCLK	IISDI	IISDO	IISLRCK*/
	/*		VD4		VD5		VD6		VD7		[		for UDA1341			]*/
	/*		11		11		11		11		11		11		11		11*/
	rPDATC = 0x3fff;	//All IO is high
	rPCONC = 0x5f55ffff;	
	rPUPC  = 0x3000;	//PULL UP RESISTOR should be enabled to I/O

	//PORT D GROUP for LCD
	/*BIT 7	6	5		4		3		2		1		0*/
	/*      VF	VM	VLINE	VCLK	VD3		VD2		VD1		VD0*/
	/*	  10	10	10		10		10		10		10		10*/
	rPDATD= 0xff;
	rPCOND= 0xaaaa;
	rPUPD = 0x0;
	
	//PORT E GROUP
	/*  Bit	 	8		7		6		5		4		3		2		1		0	*/
	/*		CODECLK	TOUT4	TOUT3	TOUT2	TOUT1	TOUT0	RXD0	TXD0	SMRB(I)	*/
	/*			10		10		10		10		10		10		10		10		00	*/
	rPDATE = 0x1ff;
	rPCONE = 0x028;
	rPUPE  = 0x106;

	//PORT F GROUP
	/*  Bit	8		7		6		5		4		3		2		1	      0*/
	/*		SIOCLK	SIORxD	7843CS	SIOTxD	[Input(DMA)	]	Output	IICSDA	IICSCL*/
	/*		011		011		001		011		00		00		01		10     	10*/

	rPDATF = 0x1fb;	//GPF2=0
	rPCONF = 0x1B2C1A;	//0x9241A;
	rPUPF  = 0x3;

	//PORT G GROUP
	/*BIT	7		6		5		4		3		2		1		0*/
	/*		INT7		INT6		INT5		INT4		INT3		INT2		INT1		INT0*/
	/*		11		11		00		11		11		11		11		11*/
	//						~tch		~~input for bios
	rPDATG = 0xff;
	rPCONG = 0xf3ff;
	rPUPG  = 0x0;	//should be enabled  

	rSPUCR=0x7;  //D15-D0 pull-up disable

/*定义非Cache区*/
//NCACHBE0=(((unsigned int)Non_Cache_End>>12)<<16)|(Non_Cache_Start>>12); 
/*所有的外部硬件中断为低电平触发*/
//EXTINT=0x0;
}
/**************************************************************************************************/
static int delayLoopCount=400;
//1S=1,000,000 uS
//t_watchdog  = 1/( MCLK / (Prescaler value + 1) / Division_factor )
//Prescaler=MCLK/1000000-1
//t_watchdog=1/1000000/(1/64) s=64 us
void Delay(int time)
// time=0: adjust the Delay function by WatchDog timer.//
// time>0: the number of loop time//
// 100us resolution.//
{
	int i,adjust=0;
	if(time==0)
	{
		time=200;
		adjust=1;
		delayLoopCount=400;
		rWTCON=((MCLK/1000000-1)<<8)|(2<<3);		// 64us,Watch-dog,nRESET,interrupt disable//
		rWTDAT=0xffff;
		rWTCNT=0xffff;	 
		rWTCON=((MCLK/1000000-1)<<8)|(2<<3)|(1<<5); // 64us,Watch-dog enable,nRESET,interrupt disable //
	}
	for(;time>0;time--)
		for(i=0;i<delayLoopCount;i++);
	if(adjust==1)
	{
		rWTCON=((MCLK/1000000-1)<<8)|(2<<3);
		i=0xffff-rWTCNT;				/*aim at 100us*/
		delayLoopCount=8000000/(i*64);	/* (200*400):(64us*i)=(1*delayLoopCount):100us*/
	}									/*delayLoopCount=200*400*100*/
}
/**************************************************************************************************/