UART初始化函数及其使用

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 + -1 ); }

void UART1_Init(int mclk,int baud) {

if(mclk==0) mclk=MCLK; rPCONE = 0x28; rULCON0=0x3; rUCON0=0x245;

rUBRDIV0=( (int)(mclk/16./baud + -1 ); }

查询方式发送数据

void 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 \"\" #include \"\" #include \"\" void Main(void);

extern void Eint4567Isr(void) __attribute__ ((interrupt (\"IRQ\"))); void init_Eint(void)； void Main(void)

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{

sys_init(); /* 初始化s3c44B0XInterrupt,Port and UART */ _Link();

init_Eint() ; }

#include \"\" #include \"\"

void Eint4567Isr(void) __attribute__ ((interrupt (\"IRQ\"))); void init_Eint(void)； extern void Delay(int time); void init_Eint(void) {

rI_ISPC = 0x3ffffff;

if(which_int == 4) {

Uart_Printf(\"发送：\\n\"); Uart_SendByte('*'); }

else if(which_int == 8) i=Uart_Getch(); Uart_Printf(\" %c \\n\ } }

// SB3

{ Uart_Printf(\"接收：\\n\");

// SB2

rEXTINTPND = 0xf;

//clear pending_bit

rI_ISPC=BIT_EINT4567;

Uart_Printf(\"\\n\\rEmbest 44B0X Evaluation Board(S3CEV40)\");

Uart_Printf(\"\\n\\r8-segment Digit LED Test Example(Please look at LED)\\n\"); for( ; ; ) { ; }

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