//CAUTION:Follow the configuration order for setting the ports.
     // 1) setting value(GPnDAT) 
     // 2) setting control register  (GPnCON)
     // 3) configure pull-up resistor(GPnUP)      //32bit data bus configuration  
     //*** PORT A GROUP
     //Ports  : GPA22 GPA21  GPA20 GPA19 GPA18 GPA17 GPA16 GPA15 GPA14 GPA13 GPA12 
     //Signal : nFCE nRSTOUT nFRE   nFWE  ALE   CLE  nGCS5 nGCS4 nGCS3 nGCS2 nGCS1
     //Binary :  1     1      1  , 1   1   1    1   ,  1     1     1     1
     //Ports  : GPA11   GPA10  GPA9   GPA8   GPA7   GPA6   GPA5   GPA4   GPA3   GPA2   GPA1  GPA0
     //Signal : ADDR26 ADDR25 ADDR24 ADDR23 ADDR22 ADDR21 ADDR20 ADDR19 ADDR18 ADDR17 ADDR16 ADDR0
     //Binary :  1       1      1      1   , 1       1      1      1   ,  1       1     1      1        
     rGPACON = 0x7fffff;     //**** PORT B GROUP
     //Ports  : GPB10    GPB9    GPB8    GPB7    GPB6     GPB5    GPB4   GPB3   GPB2     GPB1      GPB0
     //Signal : nXDREQ0 nXDACK0 nXDREQ1 nXDACK1 nSS_KBD nDIS_OFF L3CLOCK L3DATA L3MODE nIrDATXDEN Keyboard
     //Setting: INPUT  OUTPUT   INPUT  OUTPUT   INPUT   OUTPUT   OUTPUT OUTPUT OUTPUT   OUTPUT    OUTPUT
     //Binary :   00  ,  01       00  ,   01      00   ,  01       01  ,   01     01   ,  01        01 
     //rGPBCON = 0x000150;(youlong)
     rGPBCON = 0x015550;
     rGPBUP  = 0x7ff;     // The pull up function is disabled GPB[10:0]    //*** PORT C GROUP for youlong
     //Ports  : GPC15 GPC14 GPC13 GPC12 GPC11 GPC10 GPC9 GPC8  GPC7   GPC6   GPC5 GPC4 GPC3  GPC2  GPC1 GPC0
     //Signal : VD7   VD6   VD5   VD4   VD3   VD2   VD1  VD0 LCDVF2 LCDVF1 LCDVF0 VM VFRAME VLINE VCLK LEND 
     //Binary :  10   10  , 10    10  , 10    10  , 10   10  , 10     10  ,  10   10 , 10     10 , 10   10
     //rGPCCON = 0xaaaaaaaa;       
     //rGPCUP  = 0xffff;     // The pull up function is disabled GPC[15:0] 
     
     //*** PORT C GROUP
     //Ports  : GPC15 GPC14 GPC13 GPC12 GPC11 GPC10 GPC9 GPC8  GPC7   GPC6   GPC5 GPC4 GPC3  GPC2  GPC1 GPC0
     //Signal : VD7   VD6   VD5   VD4   VD3   VD2   VD1  VD0 LCDVF2 LCDVF1 LCDVF0 VM VFRAME VLINE VCLK LEND 
     //Binary :  10   10  , 10    10  , 10    10  , 10   01  , 01     01  ,  01   10 , 10     10 , 10   10
     rGPCCON = 0xaaa956aa;       
     rGPCUP  = 0xffff;     // The pull up function is disabled GPC[15:0]         //*** PORT D GROUP
     //Ports  : GPD15 GPD14 GPD13 GPD12 GPD11 GPD10 GPD9 GPD8 GPD7 GPD6 GPD5 GPD4 GPD3 GPD2 GPD1 GPD0
     //Signal : VD23  VD22  VD21  VD20  VD19  VD18  VD17 VD16 VD15 VD14 VD13 VD12 VD11 VD10 VD9  VD8
     //Binary : 10    10  , 10    10  , 10    10  , 10   10 , 10   10 , 10   10 , 10   10 ,10   10
     rGPDCON = 0xaaaaaaaa;       
     rGPDUP  = 0xffff;     // The pull up function is disabled GPD[15:0]    //*** PORT E GROUP
     //Ports  : GPE15  GPE14 GPE13   GPE12   GPE11   GPE10   GPE9    GPE8     GPE7  GPE6  GPE5   GPE4 
     //Signal : IICSDA IICSCL SPICLK SPIMOSI SPIMISO SDDATA3 SDDATA2 SDDATA1 SDDATA0 SDCMD SDCLK IN
     //Binary :  10     10  ,  10      10  ,  10      10   ,  10      10   ,   10    10  , 10     00  ,    
     //-------------------------------------------------------------------------------------------------------
     //Ports  :  GPE3   GPE2  GPE1    GPE0    
     //Signal :  IN     IN    IN      IN  
     //Binary :  00     00  ,  00      00 
     //rGPECON = 0xaaaaaaaa;       
     //rGPEUP  = 0xffff;     // The pull up function is disabled GPE[15:0]
  rGPECON = 0xa02aa800; // For added AC97 setting      
     rGPEUP  = 0xffff;          //*** PORT F GROUP
     //Ports  : GPF7   GPF6   GPF5   GPF4      GPF3     GPF2  GPF1   GPF0
     //Signal : nLED_8 nLED_4 nLED_2 nLED_1 nIRQ_PCMCIA EINT2 KBDINT EINT0
     //Setting: Output Output Output Output    EINT3    EINT2 EINT1  EINT0
     //Binary :  01      01 ,  01     01  ,     10       10  , 10     10
     rGPFCON = 0x55aa;
     rGPFUP  = 0xff;     // The pull up function is disabled GPF[7:0]    //*** PORT G GROUP
     //Ports  : GPG15 GPG14 GPG13 GPG12 GPG11    GPG10    GPG9     GPG8     GPG7      GPG6   
     //Signal : nYPON  YMON nXPON XMON  EINT19 DMAMODE1 DMAMODE0 DMASTART KBDSPICLK KBDSPIMOSI
     //Setting: nYPON  YMON nXPON XMON  EINT19  Output   Output   Output   SPICLK1    SPIMOSI1
     //Binary :   11    11 , 11    11  , 10      01    ,   01       01   ,    11         11
     //-----------------------------------------------------------------------------------------
     //Ports  :    GPG5       GPG4    GPG3    GPG2    GPG1    GPG0    
     //Signal : KBDSPIMISO LCD_PWREN EINT11 nSS_SPI IRQ_LAN IRQ_PCMCIA
     //Setting:  SPIMISO1  LCD_PWRDN EINT11   nSS0   EINT9    EINT8
     //Binary :     11         11   ,  10      11  ,  10        10
     rGPGCON = 0x00a2aaaa;// GPG9 input without pull-up
     rGPGUP  = 0xffff;    // The pull up function is disabled GPG[15:0]    //*** PORT H GROUP
     //Ports  :  GPH10    GPH9  GPH8 GPH7  GPH6  GPH5 GPH4 GPH3 GPH2 GPH1  GPH0 
     //Signal : CLKOUT1 CLKOUT0 UCLK nCTS1 nRTS1 RXD1 TXD1 RXD0 TXD0 nRTS0 nCTS0
     //Binary :   10   ,  10     10 , 11    11  , 10   10 , 10   10 , 10    10
     rGPHCON = 0x00faaa;
     rGPHUP  = 0x7ff;    // The pull up function is disabled GPH[10:0] // Added for S3C2440X, DonGo
  //*** PORT J GROUP
     //Ports  : GPJ12   GPJ11       GPJ10    GPJ9    GPJ8      GPJ7      GPJ6      GPJ5      GPJ4      GPJ3      GPJ2      GPJ1     GPJ0
     //Signal : CAMRESET CAMPCLKOUT CAMHREF CAMVSYNC CAMPCLKIN CAMDAT[7] CAMDAT[6] CAMDAT[5] CAMDAT[4] CAMDAT[3] CAMDAT[2] CAMDAT[1] CAMDAT[0]
     //Binary :   10      10       10        10       10        10        10        10       10         10        10        10      10
     rGPJCON = 0x02aaaaaa;
     rGPJUP  = 0x1fff;    // The pull up function is disabled GPH[10:0]
     
     //External interrupt will be falling edge triggered. 
     rEXTINT0 = 0x22222222;    // EINT[7:0]
     rEXTINT1 = 0x22222222;    // EINT[15:8]
     rEXTINT2 = 0x22222222;    // EINT[23:16]

TQ2440   led流水灯控制代码
void my_led_test(void)
 {
  int i, loop = 0;
  
  rGPBCON |= 0X015400; //config GPB5,GPB6,GPB7,GPB8 output
  rGPBUP |= 0X1E0;
  
  
  while (loop++ < 4)
  {
   for (i = 0; i < 4; i++)
   {
    rGPBDAT = 0X1E0; //SET OUTPUT '1  led off
    Delay(1000);
    rGPBDAT = ~0X1E0; //SET output '0' led on
    Delay(1000);
   }
   for (i = 0; i < 4; i++)
   {
    Delay(1000);
    rGPBDAT = 1 << (5 + i);
    Uart_Printf("GPBDAT%02d, rGPBDAT: %x\n", i, rGPBDAT);
    Delay(1000);
   }
   rGPBDAT = ~0X1E0; //SET output '0' led on
   for (i = 3; i >= 0; i--)
   {
    Delay(1000);
    rGPBDAT = 1 << (5 + i);
    Uart_Printf("GPBDAT%02d, rGPBDAT: %x\n", i, rGPBDAT);
    Delay(1000);
   }
  }
 }