s3c2440 realview 串口的通讯源码

//=================================================================== // File Name : 2440lib.c // Function : S3C2440 PLL,Uart, LED, Port Init // Date : March 20, 2002 // Version : 0.0 // History // 0.0 : Programming start (February 20,2002) -> SOP //=================================================================== #include "def.h" #include "option.h" #include "2440addr.h" #include "2440lib.h" #include "2440slib.h" #include <stdarg.h> #include <string.h> #include <stdlib.h> #include <stdio.h> #include <ctype.h> extern char Image$$RW_RAM1$$RW$$Limit[]; void *mallocPt=Image$$RW_RAM1$$RW$$Limit; //***************************[ SYSTEM ]*************************************************** static int delayLoopCount; void Delay(int time) { // time=0: adjust the Delay function by WatchDog timer. // time>0: the number of loop time // resolution of time is 100us. int i,j, adjust=0; if(time==0) { time = 200; adjust = 1; delayLoopCount = 800; //PCLK/1M,Watch-dog disable,1/64,interrupt disable,reset disable rWTCON = ((PCLK/1000000-1)<<8)|(2<<3); rWTDAT = 0xffff; //for first update rWTCNT = 0xffff; //resolution=64us @any PCLK rWTCON = ((PCLK/1000000-1)<<8)|(2<<3)|(1<<5); //Watch-dog timer start } for(j=0;j<time;j++) { for(i=0;i<delayLoopCount;i++){} } if(adjust==1) { rWTCON = ((PCLK/1000000-1)<<8)|(2<<3); //Watch-dog timer stop i = 0xffff - rWTCNT; //1count->64us, 200*800 cycle runtime = 64*i us Uart_Printf("\nrWTCNT=%x ", rWTCNT); Uart_Printf("\ni (0xffff -rWTCNT)=%d", i); delayLoopCount = 16000000/(i*64); //200*800:64*i=1*x:100 -> x=160000*100/(64*i) Uart_Printf("\ndelayLoopCount=%d", delayLoopCount); } } //***************************[ PORTS ]**************************************************** void Port_Init(void) { //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: OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT //Binary : 01 , 01 01 , 01 01 , 01 01 , 01 01 , 01 01 rGPBCON = 0x155555; rGPBUP = 0x7ff; // The pull up function is disabled GPB[10:0] //*** 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 10 , 10 10 , 10 10 , 10 10 , 10 10 rGPCCON = 0xaaaaaaaa; 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 I2SSDO //Binary : 10 10 , 10 10 , 10 10 , 10 10 , 10 10 , 10 10 , //------------------------------------------------------------------------------------------------------- //Ports : GPE3 GPE2 GPE1 GPE0 //Signal : I2SSDI CDCLK I2SSCLK I2SLRCK //Binary : 10 10 , 10 10 rGPECON = 0xaaaaaaaa; rGPEUP = 0xffff; // The pull up function is disabled GPE[15:0] //*** 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 = 0xff95ffba; 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 = 0x2afaaa; rGPHUP = 0x7ff; // The pull up function is disabled GPH[10:0] // Added for S3C2440, DonGo //PORT J GROUP //Ports : GPJ12 GPJ11 GPJ10 GPJ9 GPJ8 GPJ7 GPJ6 GPJ5 GPJ4 GPJ3 GPJ2 GPJ1 GPJ0 //Signal : CAMRESET CAMCLKOUT CAMHREF CAMVS CAMPCLKIN CAMD7 CAMD6 CAMD5 CAMD4 CAMD3 CAMD2 CAMD1 CAMD0 //Setting: Out Out CAMHREF CAMVS CAMPCLKIN CAMD7 CAMD6 CAMD5 CAMD4 CAMD3 CAMD2 CAMD1 CAMD0 //Binary : 01 01 10 10 10 10 10 10 10 10 10 10 10 //PU_OFF : 1 0 1 1 1 1 1 1 1 1 1 1 1 //--------------------------------------------------------------------------------------- rGPJDAT = (1<<12)|(0<<11); rGPJCON = 0x016aaaa; rGPJUP = ~((0<<12)|(1<<11)); rGPJDAT = (0<<12)|(0<<11); rGPJCON = 0x016aaaa; rGPJUP = 0x1fff;//~((1<<12)|(1<<11)); //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] } //***************************[ UART ]****************************** static int whichUart=1;