串行通信dsptms320c6713源，采用轮询方式RS232端口传输…

#define UART_BASE_ADDR 0x90120000 #define OFFSET 2 #define RBR *((short *)(UART_BASE_ADDR+0*OFFSET)) #define THR *((short *)(UART_BASE_ADDR+0*OFFSET)) #define IER *((short *)(UART_BASE_ADDR+1*OFFSET)) #define IIR *((short *)(UART_BASE_ADDR+2*OFFSET)) #define FCR *((short *)(UART_BASE_ADDR+2*OFFSET)) #define LCR *((short *)(UART_BASE_ADDR+3*OFFSET)) #define MCR *((short *)(UART_BASE_ADDR+4*OFFSET)) #define LSR *((short *)(UART_BASE_ADDR+5*OFFSET)) #define MSR *((short *)(UART_BASE_ADDR+6*OFFSET)) #define SCR *((short *)(UART_BASE_ADDR+7*OFFSET)) #define DLL *((short *)(UART_BASE_ADDR+0*OFFSET)) #define DLM *((short *)(UART_BASE_ADDR+1*OFFSET)) #define CECTL1 *((long *)0x01800004) void wait(int nWait); char cString[17]={ "Hello PC!,Over|" },cReceive,cBuffer[17],cAnswer[16]={"Oh,you say"}; int bReceive,nLen; main() { unsigned int uWork; int i,k; bReceive=0; LCR = 0x80; DLL = 0x18; DLM = 0x00; LCR = 0x03; FCR = 0x01; MCR = 0x20; IER = 0x00; while ( 1 ) { if ( bReceive==0 ) { for ( i=0;i<16;i++ ) { do { uWork=LSR; } while ( uWork&0x040 != 0x040 ); THR=cString[i]; wait(1024); } } else { for ( i=0;i<10;i++ ) { do { uWork=LSR; } while ( uWork&0x040 != 0x040 ); THR=cAnswer[i]; wait(1024); } do { uWork=LSR; } while ( uWork&0x040 != 0x040 ); THR='\"'; for ( i=0;i<nLen;i++ ) { do { uWork=LSR; } while ( uWork&0x040 != 0x040 ); THR=cBuffer[i]; wait(1024); } do { uWork=LSR; } while ( uWork&0x040 != 0x040 ); THR='\"'; wait(1024); for ( i=9;i<16;i++ ) { do { uWork=LSR; } while ( uWork&0x040 != 0x040 ); THR=cString[i]; wait(1024); } } k=0; bReceive=0; while ( 1 ) { do { uWork=LSR; } while ( (uWork&1)==0 ); cReceive=RBR; cBuffer[k]=cReceive&0x0ff; if ( cReceive=='.' ) { cBuffer[k+1]='\0'; nLen=k+1; bReceive=1; break; } k++; k%=16; } } } void wait(int nWait) { int i,j,k=0; for ( i=0;i<nWait;i++ ) for ( j=0;j<64;j++ ) k++; }