main.c

嵌入式开发板使用ARM9对一些IO口操作

#define	GLOBAL_CLK
#include <stdlib.h>
#include <string.h>
#include "def.h"
#include "option.h"
#include "2440addr.h"
#include "2440lib.h"
#include "2440slib.h"
#include "mmu.h"
#include "profile.h"
#include "memtest.h"

#include "usbmain.h"
#include "usbout.h"
#include "usblib.h"
#include "2440usb.h"
/*延时函数*/
void DD(unsigned int x)
{
	unsigned int i,j,k;
	for(i=0;i<=x;i++)
		for(j=0;j<0xff;j++)
			for(k=0;k<0xff;k++);
}

void HaltUndef(void)
{
	Uart_Printf("Undefined instruction exception!!!\n");
	while(1);
}

void HaltSwi(void)
{
	Uart_Printf("SWI exception!!!\n");
	while(1);
}

void HaltPabort(void)
{
	Uart_Printf("Pabort exception!!!\n");
	while(1);
}

void HaltDabort(void)
{
	Uart_Printf("Dabort exception!!!\n");
	while(1);
}


void Isr_Init(void)
{
	pISR_UNDEF=(unsigned)HaltUndef;
	pISR_SWI  =(unsigned)HaltSwi;
	pISR_PABORT=(unsigned)HaltPabort;
	pISR_DABORT=(unsigned)HaltDabort;
	rINTMOD=0x0;	  // All=IRQ mode
	rINTMSK=BIT_ALLMSK;	  // All interrupt is masked.

	//pISR_URXD0=(unsigned)Uart0_RxInt;	
	//rINTMSK=~(BIT_URXD0);   //enable UART0 RX Default value=0xffffffff

	
		//Why doesn't it receive the big file if use this. (???)
		//It always stops when 327680 bytes are received.
	
	ClearPending(BIT_DMA2);
	ClearPending(BIT_USBD);
	//rINTMSK&=~(BIT_USBD);  
   
	//pISR_FIQ,pISR_IRQ must be initialized
}

static U32 UPLL;
static U32 cpu_freq;
static void cal_cpu_bus_clk(void)
{
	U32 val;
	U8 m, p, s;
	
	val = rMPLLCON;
	m = (val>>12)&0xff;
	p = (val>>4)&0x3f;
	s = val&3;

	//(m+8)*FIN*2 不要超出32位数!
	FCLK = ((m+8)*(FIN/100)*2)/((p+2)*(1<<s))*100;
	
	val = rCLKDIVN;
	m = (val>>1)&3;
	p = val&1;	
	val = rCAMDIVN;
	s = val>>8;
	
	switch (m) {
	case 0:
		HCLK = FCLK;
		break;
	case 1:
		HCLK = FCLK>>1;
		break;
	case 2:
		if(s&2)
			HCLK = FCLK>>3;
		else
			HCLK = FCLK>>2;
		break;
	case 3:
		if(s&1)
			HCLK = FCLK/6;
		else
			HCLK = FCLK/3;
		break;
	}
	
	if(p)
		PCLK = HCLK>>1;
	else
		PCLK = HCLK;
	
	if(s&0x10)
		cpu_freq = HCLK;
	else
		cpu_freq = FCLK;
		
	val = rUPLLCON;
	m = (val>>12)&0xff;
	p = (val>>4)&0x3f;
	s = val&3;
	UPLL = ((m+8)*FIN)/((p+2)*(1<<s));
	UCLK = (rCLKDIVN&8)?(UPLL>>1):UPLL;
}
int LedMain()
{
	
	int i;
	U8 key;
	U32 mpll_val = 0 ;
	int consoleNum;
	
	unsigned char ledtab[]={0xff,0xbf,0x0f};
	
	//U32 divn_upll = 0 ;
    

	Port_Init();
	
	Isr_Init();
	
	i = 2 ;	//don't use 100M!
		//boot_params.cpu_clk.val = 3;
	switch ( i ) {
	case 0:	//200
		key = 14;
		mpll_val = (100<<12)|(2<<4)|(2);
		break;
	case 1:	//300
		key = 14;
		mpll_val = (60<<12)|(1<<4)|(1);
		break;
	case 2:	//400
		key = 14;
		mpll_val = (92<<12)|(1<<4)|(1);
		break;
	case 3:	//440!!!
		key = 14;
		mpll_val = (102<<12)|(1<<4)|(1);
		break;
	default:
		key = 14;
		mpll_val = (92<<12)|(1<<4)|(1);
		break;
	}
	
	//init FCLK=400M, so change MPLL first
	//ChangeMPllValue((mpll_val>>12)&0xff, (mpll_val>>4)&0x3f, mpll_val&3);
	//ChangeClockDivider(key, 12);
	
	//串口发送数据一定要有   注意一下这个函数的用处
	cal_cpu_bus_clk();
	
	



	consoleNum = 0;	// Uart 1 select for debug. 
	Uart_Init( 0,115200 );
	Uart_Select( consoleNum );
	
	//Beep(2000, 100);
	
	Uart_SendByte('\n');
	Uart_Printf("<***********************************************>\n");

	rGPFUP&= 0xffffff1f;//IO使能
	rGPFCON&= 0xffff0000;//清零
	rGPFCON|= 0x5400;//输出有效
   
	while(1)
	{
		for(i=0;i<3;i++)
		{
			rGPFDAT=ledtab[i];
			DD(5);
		}
	}	
	

	return(0);
}