boot_ucos.c

英蓓特Embest EduKit-III基础实验源码及教程 基于ARM7和ARM9

/*********************************************************************************************
* File：	boot_ucos.c
* Author:	embest
* Desc：	
* History:	
*********************************************************************************************/
#include "44b.h"
#include "44blib.h"

void beep(int BeepStatus);

/*********************************************************************************************
* name:		main
* func:		c code entry
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void Main(void)//int argc, char **argv
{
	port_init();
	beep(1);
	delay(10000);
	beep(0);
	while(1);
}                              

/*********************************************************************************************
* name:		delay
* func:		delay time
* para:		nTime -- input: the number of loop time, 100us resolution.
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void delay(int nTime)
{
	int i;
	
	for(i=100000;i>0;i--);
		for(i=nTime;i>0;i--);
}

void beep(int BeepStatus)
{
	if (BeepStatus==0)
		rPDATE=rPDATE|0x8;
	else
		rPDATE=rPDATE&0x1f7;

}
/*********************************************************************************************
* name:		port_init
* func:		initialize io port for Embest teach kit ii
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void port_init(void)
{
	// 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
	// 	9	8	7	6	5	4	3	2	1	0
	// 	A24	A23	A22	A21	A20	A19	A18	A17	A16	A0
	//	0	1	1	1	1	1	1	1	1	1
	rPCONA = 0x1ff;	

	// PORT B GROUP
	// 	10		9		8		7		6		5		4		3		2		1		0
	//	/CS5	/CS4	/CS3	/CS2	/CS1	GPB5	GPB4	/SRAS	/SCAS	SCLK	SCKE
	//	EXT		NIC		USB		IDE		SMC		NC		NC		Sdram	Sdram	Sdram	Sdram
	//	?		?		?		?		?		Out		Out		?		?		?		?
	//  1 		1   	1   	1    	1    	0       0     	1    	1    	1   	1	
	rPDATB = 0x7ff;				
	rPCONB = 0x1cf;
    
	// PORT C GROUP, BUSWIDTH=16
	//  15		14		13		12		11		10		9		8		7		6		5		4		3		2		1		0
	//	NC		NC		Uart1	Uart1	NC		NC		NC		NC		NC		NC		NC		NC		out		out		out		out
	//	?		?		?		?		?		?		?		?		?		?		?		?		*		*		*		*																													*						
	//	00		00		11		11		00		00		01		01		00		00		00		00		01		01		01		01
	rPDATC = 0xfc00;
	rPCONC = 0x0FF5FF55;	
//	rPCONC = 0x0ff0ff55;	// EduKit-II
//	rPCONC = 0x0ff0ffff;	// S3CEV40
	rPUPC  = 0x30ff;										// PULL UP RESISTOR should be enabled to I/O

	// PORT D GROUP
	// 	BIT7	6		5		4		3		2		1		0
	//	VF		VM		VLINE	VCLK	VD3		VD2		VD1		VD0
	//	00		00		00		00		00		00		00		00
	rPDATD = 0xff;
	rPCOND = 0xaaaa;	
	rPUPD  = 0x0;
	// These pins must be set only after CPU's internal LCD controller is enable
	
	// PORT E GROUP 
	// 	8		7		6		5		4		3			2		1		0
	// 	CODECLK	Out		Out		Out		?		Out(Beep)	RXD0	TXD0	?
	//  *		*		*		*				*			*		*
	// 	10		01		01		01		00		01			10		10		00
	rPDATE = 0x1ff;
	rPCONE = 0x25468;	
	rPUPE  = 0x6;
	
	// PORT F GROUP
	// 	8		7		6		5		 4		3		2		1		0
	// 	IISCLK	IISDI	IISDO	IISLRCK	Out		Out		Input	IICSDA	IICSCL
	//	*		*		*		*		*		*		*		*		*
	// 	100		100		100		100		01		01		00		10		10
	rPDATF = 0xe7;
	rPCONF = 0x24914A;										// PF3:LED4 PF4:LED3 PF2:nWait
//	rPCONF = 0x252A; //S3CEV40
	rPUPF  = 0x0;

	// PORT G GROUP
	// 	7		6		5		4		3		2		1		0
	// 	INT7	INT6	INT5	INT4	INT3	INT2	INT1	INT0
	//	S3		S4		S5		S6		NIC				IDE		USB
	//											*
	//	11      11      11      11      11      11      11      11
	rPDATG = 0xff;
	rPCONG = 0xffff;
	rPUPG  = 0x0;											// should be enabled  
	rSPUCR = 0x7;  											// D15-D0 pull-up disable

	// Non Cache area
	rNCACHBE0 = ((NON_CACHE_END>>12)<<16) | (NON_CACHE_START>>12); 

	// Low level default
	rEXTINT = 0x0;
}