xmain.c

arm9 s3c2440与zlg7290的接口程序。在 ADS1.2下通过编译并能运行。

//====================================================================
// File Name : xmain.c
// Function  : S3C2440 Test Main Menu
// Program   : Junon
// Date      : Nov 29, 2003
// Version   : 0.0
// History
//   0.0 : Programming start (February 20,2002) -> 
//====================================================================

#include <stdlib.h>
#include <string.h>

#include "def.h"
#include "option.h"
#include "2440addr.h"
#include "2440lib.h" // 03.11.27 junon


#if USE_MAIN
#include <stdio.h>
#endif




void Isr_Init(void);
void HaltUndef(void);
void HaltSwi(void);
void HaltPabort(void);
void HaltDabort(void);

void Clk0_Enable(int clock_sel);	
void Clk1_Enable(int clock_sel);
void Clk0_Disable(void);
void Clk1_Disable(void);
int SST39VF160_CheckId(void);

extern void Calc_Clock(int print_msg);
extern U32 Mdiv, Pdiv, Sdiv, Fclk, Hclk, Pclk, Hdivn, Pdivn, Hclk_Ratio, Pclk_Ratio, Ref_Cnt;
unsigned char const  LED_TAB[] = { 0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
							0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71 };


// Clock select argument.
#define	UCLK_SEL	(1)
#define	HCLK_SEL	(3)
#define	PCLK_SEL	(4)
#define	DCLK_SEL	(5)
// Hidden
#define	MPLL_SEL	(0)
#define	FCLK_SEL	(2)

//===================================================================

void xmain(void)
{
	int i, voltage=120;
	unsigned int mpll_val;

	// GPIO port init.
	Port_Init();

	//Led_Display(0xf);
	
	// MMU init. I/D cache on.
       // MMU_Init();
   
	//Led_Display(0x1);

	//////// user can set clock again.	/////////
#if 0
	Delay(0);
	voltage=110;
	Max1718_Set(voltage);		// set proper voltage after clock changed.
	Delay(1);

	#if FIN==12000000	//When 12MHz.
	ChangeUPllValue(56,2,2);		// 48MHz
	for(i=0; i<7; i++);
	ChangeClockDivider(13,12);
	ChangeMPllValue(68,1,1);		//2440x
	#else	// else xtal_in=16.9344MHz.
	ChangeUPllValue(60,4,2);		// 48MHz
	for(i=0; i<7; i++);
	ChangeClockDivider(13,12);
	//ChangeMPllValue(118,2,2);	//265Mhz
	ChangeMPllValue(97,1,2);		//295Mhz
	//ChangeMPllValue(110,3,1);	//398Mhz
	//ChangeMPllValue(120,2,1);	//531Mhz
	#endif
#endif
	/////////////////////////////////////////

	//Led_Display(0x2);
	
	Calc_Clock(0);
	UPDATE_REFRESH(Hclk);
    //Led_Display(0x3);    
	// ISR init
	Isr_Init();

	Uart_Init(Pclk, 115200);
	Uart_Select(0);
	Uart_TxEmpty(0);
   // Led_Display(0x7);
    
	// timer setting for delay 100us unit.
	//Check whether or not the POWER_OFF wake-up.
	Delay(0);	//calibrate Delay()


	//rIISPSR=(2<<5)|(2<<0); //IIS_LRCK=44.1Khz @384fs,PCLK=50Mhz.

	// Set I/O strength control.
	rDSC0 = (0<<31)|(0x3<<8)|(0xff<<0);
//	rDSC0 = (0<<31)|(0x0<<8)|(0x00<<0);
	// nEN_DSC	[31]	: 0:I/O drive strength enable, 1:Disable
	// DSC_ADR	[9:8]	: Addr drive strength, 0:10mA, 1:8mA, 2:6mA, 3:4mA
	// DSC_DATA	[7:0]	: DATA drive strength, 0:12mA, 1:10mA, 2:8mA, 3:6mA
	rDSC1 = (0x3<<28)|(0x3<<26)|(0xfffff<<0);

	
	// CLKOUT0/1 select.
	
	Uart_Printf("CLKOUT0:MPLL in, CLKOUT1:RTC clock.\n");
	Clk0_Enable(2);	// 0:MPLLin, 1:UPLL, 2:FCLK, 3:HCLK, 4:PCLK, 5:DCLK0
	Clk1_Enable(3);	// 0:MPLLout, 1:UPLL, 2:RTC, 3:HCLK, 4:PCLK, 5:DCLK1	
   
	//Test_Iic2();
	
while(1);

} // end of xmain().

//===================================================================
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
//    rINTCON=0x5;						   //Non-vectored,IRQ enable,FIQ disable    
    rINTMSK     = BIT_ALLMSK;			  //All interrupt is masked.
    rINTSUBMSK  = BIT_SUB_ALLMSK;		  //All sub-interrupt is masked. <- April 01, 2002 SOP

//    rINTSUBMSK  = ~(BIT_SUB_RXD0);		 //Enable Rx0 Default value=0x7ff
//    rINTMSK     = ~(BIT_UART0);			//Enable UART0 Default value=0xffffffff    
	
//    pISR_UART0=(unsigned)RxInt;			//pISR_FIQ,pISR_IRQ must be initialized
}

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

//===================================================================
void HaltSwi(void)
{
#if !SEMIHOSTING	
		Uart_Printf("SWI exception!!!\n");
		while(1);
#endif	
}

//===================================================================
void HaltPabort(void)
{
    Uart_Printf("Pabort exception.\n");
    while(1);
}

//===================================================================
void HaltDabort(void)
{
    Uart_Printf("Dabort exception.\n");
    while(1);
}

void Clk0_Enable(int clock_sel)	
{	// 0:MPLLin, 1:UPLL, 2:FCLK, 3:HCLK, 4:PCLK, 5:DCLK0
	rMISCCR = rMISCCR&~(7<<4) | (clock_sel<<4);
	rGPHCON = rGPHCON&~(3<<18) | (2<<18);
}
void Clk1_Enable(int clock_sel)
{	// 0:MPLLout, 1:UPLL, 2:RTC, 3:HCLK, 4:PCLK, 5:DCLK1	
	rMISCCR = rMISCCR&~(7<<8) | (clock_sel<<8);
	rGPHCON = rGPHCON&~(3<<20) | (2<<20);
}
void Clk0_Disable(void)
{
	rGPHCON = rGPHCON&~(3<<18);	// GPH9 Input
}
void Clk1_Disable(void)
{
	rGPHCON = rGPHCON&~(3<<20);	// GPH10 Input
}