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1、串口函数总结串口的初始化void UART0_Init(int mclk,int baud)if(mclk=0) mclk=MCLK;rPCONE = 0x28;rULCON0=0x3; rUCON0=0x245;rUBRDIV0=( (int)(mclk/16./baud + 0.5) -1 );void UART1_Init(int mclk,int baud)if(mclk=0) mclk=MCLK;rPCONE = 0x28;rULCON0=0x3; rUCON0=0x245;rUBRDIV0=( (int)(mclk/16./baud + 0.5) -1 );查询方式发送数据void
2、 UART0_SendByte(uint8 data)rUTXH0 = data;while(rUTRSTAT0 & 0x2) = 0);查询方式接收Void UART0_RcvByte(uint8 data)uint8 rcv_data; while(rUTRSTAT0 & 0x01) = 0);rcv_data = rURXH0;return(rcv_data);使用外部中断发送和接收字符的函数：#include 44blib.h#include 44b.h#include stdio.hvoid Main(void);extern void Eint4567Isr(void) _attr
3、ibute_ (interrupt (IRQ);void init_Eint(void)；void Main(void)sys_init(); /* 初始化 s3c44B0XInterrupt,Port and UART */_Link(); init_Eint() ; Uart_Printf(nrEmbest 44B0X Evaluation Board(S3CEV40);Uart_Printf(nr8-segment Digit LED Test Example(Please look at LED)n);for( ; ; ) ;#include 44b.h#include 44blib.
4、hvoid Eint4567Isr(void) _attribute_ (interrupt (IRQ);void init_Eint(void)；extern void Delay(int time);void init_Eint(void)rI_ISPC = 0x3ffffff;rEXTINTPND = 0xf; / clear EXTINTPND regrINTMOD = 0x0;rINTCON = 0x1;rINTMSK = (BIT_GLOBAL|BIT_EINT4567);pISR_EINT4567 = (int)Eint4567Isr;/* PORT G */rPCONG = 0
5、xffff; / EINT70rPUPG = 0x0; / pull up enable rEXTINT = rEXTINT|0x22220000; / EINT1、EINT4567 falling edge moderI_ISPC |= BIT_EINT4567;rEXTINTPND = 0xf; / clear EXTINTPND regvoid Eint4567Isr(void)char i;unsigned char which_int;which_int=rEXTINTPND; rEXTINTPND=0xf; /clear EXTINTPND reg.rI_ISPC=BIT_EINT4567; /clear pending_bitif(which_int = 4) / SB2Uart_Printf(发送：n);Uart_SendByte(*);else if(which_int = 8) / SB3 Uart_Printf(接收：n);i=Uart_Getch();Uart_Printf( %c n,i);
