sysinit.c

LPC2220的Bootloader自己写的,和 周立功的模版实现完全不一样

//***************************************************************
//  ARM BOOT ROUTE VER1.0@0x0C000000 for 44B0X release
//  [e-mail]
//  chenjun @ 2005-6-10
//***************************************************************


#include "..\inc\NXP_ARM.h"
#include "..\inc\usart.h"
#include "..\inc\sysinit.h"
#include "..\inc\common.h"

unsigned int MCLK;
unsigned int PCLK;

void SetPll(unsigned char M, unsigned char P)
{
	unsigned int MCLK_Value;
	unsigned int TempFV;
	unsigned int i;
	unsigned char VPBDIV;
	
	switch(P)
	{
		case 0:i=1;break;
		case 1:i=2;break;
		case 2:i=4;break;
		case 3:i=8;break;
		default:i=2;break;
	}
	
	MCLK_Value = EXT_OSC_CLK * M;
	if ((MCLK_Value > 75000000) || (MCLK_Value < 10000000)) 
	{
		puts("Set PLL is no correct!MCLK no changed!\n");
		return;
	}
	else
	{
		TempFV = MCLK_Value * 2 * i;
		if((TempFV < 156000000) || (TempFV > 320000000))
		{
			puts("Set PLL is no correct!MCLK no changed!\n");
			return;
		}
		else
		{
			rPLLCON = 0x1;
			
			if(MCLK_Value > 40000000)
			{
				VPBDIV = 2;
				PCLK = MCLK_Value >> 1;
			}
			else
			{
				VPBDIV = 1;
				PCLK = MCLK_Value;
			}
			
			rVPBDIV = VPBDIV;
			rPLLCFG = ((M - 1) | (P << 5));
		    rPLLFEED = 0xaa;
		    rPLLFEED = 0x55;
		    while((rPLLSTAT & (1 << 10)) == 0);
		    rPLLCON = 0x3;
		    rPLLFEED = 0xaa;
		    rPLLFEED = 0x55;
		    Delay(0x10000);
		    MCLK = MCLK_Value;
			return;
		}
	}
}

void PortInit(void)
{
	//***************************** PORT 0 GROUP ******************************
	//  	 15		  14	  13        12	      11	  10	  9		  8	
	//  00	P0.15    P0.14   P0.13     P0.12     P0.11   P0.10   P0.9    P0.8		
	//  01	RI1      CD1     DTR1      DSR1      CTS1    RTS1	 RXD1    TXD1
	//  10	EINT2    EINT1   MATCH1.1  MATCH1.0  CAP1.1  CAP1.0  PWM6    PWM4
	//  11	 --       --      --		--	      --      --     EINT3	  --
	//  VAL: 10       10      00        00        00      00      01      01
	//	 RE_PULSE2 RE_PULSE1 P0.13     P0.12     P0.11   P0.10   RXD1    TXD1
	//-------------------------------------------------------------------------
	//  	 7		6		5		  4		  3			2		1		0	
	//  00	P0.7   P0.6	   P0.5	     P0.4	 P0.3	   P0.2	   P0.1    P0.0		
	//  01	SSEL0  MOSI0   MISO0     SCK0    SDA	   SCL 	   RXD0    TXD0
	//  10	PWM2   CAP0.2  MATCH0.1  CAP0.1  MATCH0.0  CAP0.0  PWM3    PWM1
	//  11	EINT2   --      --		  --	 EINT1	    --	   EINT0	--
	//  VAL: 00     00      00        00      00        00      01      01
	//      P0.7   P0.6	   P0.5	     P0.4    P0.3      P0.2    RXD0    TXD0
	//*************************************************************************     
	rPINSEL0 = 0xA0050005;
	//***************************** PORT 0 GROUP ******************************
	//  	 31		  30	  29        28	      27	   26	  25	  24	
	//  00	 --      P0.30   P0.29     P0.28     P0.27     --    P0.25   P0.24		
	//  01	 --      AIN3    AIN2      AIN1      AIN0      -- 	  --      --
	//  10	 --      EINT3   CAP0.3    CAP0.2    CAP0.1    --     --      --
	//  11	 --      CAP0.0  MATCH0.3  MATCH0.2  MATCH0.1  --     -- 	  --
	//  VAL: 00       01      01        01        01       00     00      00
	//	     --      RM_R    RM_L      RM_3V3    Bais      --    P0.25   AMP_SD
	//-------------------------------------------------------------------------
	//  	 23		22	      21		20	      19	    18	      17	    16	
	//  00	P0.23  P0.22     P0.21     P0.20     P0.19     P0.18     P0.17     P0.16		
	//  01	 --     --       PWM5      MATCH1.3  MATCH0.0  CAP1.3    CAP1.2    EINT0
	//  10	 --    CAP0.0     --       SSEL1     MOSI1     MISO1     SCK1      MATCH0.2
	//  11	 --    MATCH0.0  MATCH1.3  EINT3     MATCH1.3  MATCH1.3  MATCH1.2  CAP0.2
	//  VAL: 00     00        00        00        00        00        00        01
	//    RM_TEST  AM_ANT    LCD_BL    RM_nINT   P0.19     P0.18     P0.17     RE_PUSH
	//*************************************************************************   
	rPINSEL1 = 0x15400001;

	//************************ PORT 1,2,3 GROUP ************************
	//	BIT31..28:----
	//  BIT27..25:CTRLAB: 111 [A23:2 are address line]
	//  BIT24    :CTRLP301 : 1 [P3.1 is an address line]
	//  BIT23    :CTRLP300 : 0 [P3.0 is a GPIO Pin]
	//  BIT22    :CTRLP231 : 0 [P2.31 is a GPIO Pin]
	//  BIT21    :CTRLP230 : 0 [P2.30 is a GPIO Pin] 
	//  BIT20    :CTRLP229_28 : 0 [P2.29..28 is GPIOs]
	//  BIT19..18:--
	//  BIT17..16:CTRLP324 : 01 [P3.24 is nCS3 pin]
	//  BIT15..14:CTRLP325 : 01 [P3.25 is nCS2 pin]
	//  BIT13    :CTRLP323 : 0 [P3.23 is an address line] 
	//  BIT12    :- 
	//  BIT11    :CTRLP326 : 1 [P3.26 is nCS1 pin] 
	//  BIT10..9 :-- 
	//  BIT8     :CTRLP327 : 1 [P3.27 is nWE pin]
	//  BIT7     :CTRLP328 : 0 [P3.28 is a GPIO pin]
	//  BIT6     :CTRLP329 : 0 [P3.29 is a GPIO pin]
	//  BIT5..4  :CTRLPDBP : 01 [P1.1(OE),P2.7..0(D7..0),P2.15..8(D15..8),P2.27..16(GPIO),
	//                           P2.29..28(GPIO),P2.30(GPIO),P2.31(GPIO),P1.0(CS0),P3.31(BLS0),
	//                           P3.30(BLS1),P3.28(GPIO),P3.29(GPIO)]
	//  BIT3     :GPIO/TRACE : 0 [Pins P1.25..16 are used as GPIO port]
	//  BIT2     :GPIO/DEBUG : 1 [Pins P1.31..26 are used as JTAGDebug port]
	//  BIT1..0  :--
	//***************************************************************           
	rPINSEL2 = 0x0f014914;
                     
    rSCS = 0x0; //use VPB GPIO
    rIO0DIR = 0x036e3cfc; //0 is input;1 is output
    rIO0PIN = 0x01000000;
    
    rIO1DIR = 0x03ff0000;
    rIO1PIN = 0x00fd0000;
    
    rIO2DIR = 0xfff00000;
    rIO2PIN = 0x00000000;
    
    rIO3DIR = 0x30000001;
    rIO3PIN = 0x00000000;
    
    SetPll(6,1);	
	ConsoleInit();
}