#include #include using namespace std; #define ULCON1 (*(volatile unsigned *)0x50004000) #define ULCON2 (*(volatile unsigned *)0x50008000) #define UCON1 (*(volatile unsigned *)0x50004004) #define UCON2 (*(volatile unsigned *)0x50008004) #define UBRDIV1 (*(volatile unsigned *)0x50004028) #define UBRDIV2 (*(volatile unsigned *)0x50008028) #define UFCON1 (*(volatile unsigned *)0x50004008) #define UFCON2 (*(volatile unsigned *)0x50008008) #define UFSTAT1 (*(volatile unsigned *)0x50004018) #define UFSTAT2 (*(volatile unsigned *)0x50008018) int main() { *ULCON1 &=128; *ULCON1 &=~(1<<6);//0 = Normal mode operation *ULCON2 &=~(1<<6);//0 = Normal mode operation *ULCON1 |=(5<<3);//101 = Even parity *ULCON2 |=(5<<3);//101 = Even parity *ULCON1 |=(1<<2);//1 = Two stop bit per frame *ULCON2 |=(1<<2);//1 = Two stop bit per frame *ULCON1 |=3; //11 = 8-bits *ULCON2 |=3; //11 = 8-bits *UCON1 &=~(3<<10);//00, 10 = PCLK *UCON2 &=~(3<<10);//00, 10 = PCLK *UCON1 &=~(0xf<<6);//Interrupt request type *UCON2 &=~(0xf<<6);//Interrupt request type *UCON1 |=(1<<5);//1 = Loopback mode *UCON2 |=(1<<5);//1 = Loopback mode int brdiv=(int)(50000000.0/(115200*16))-1; *UBRDIV1 =brdiv ; *UBRDIV1 =brdiv ; *UFCON1 |=(0xf<<4);//Determine the trigger level 11 = 48-byte *UFCON2 |=(0xf<<4);//Determine the trigger level 11 = 48-byte *UFCON1 |=1;//FIFO Enable *UFCON2 |=1;//FIFO Enable char tBuff[100],rBuff1[100],rBuff2[100]; printf("\nType something\n"); scanf("%s",tBuff); int i=0; while (tBuff[i]!='\0'){ if(!((*UFSTAT1)&~(1<<14)&&(*UFSTAT2)&~(1<<14))){ *UTXH1=tBuff[i]; *UTXH2=tBuff[i]; rBuff1[i]=URXH1; rBuff2[i]=URXH2; i++; } } rBuff1[i+1]='\0'; rBuff2[i+1]='\0'; printf("\nChanal 1:\n%s",rBuff1); printf("\nChanal 2:\n%s",rBuff2); return 0; }

UART loop mode