Artificial UART (SOFT UART)

Transmission // Here i am sending 2(ascii of 2 =00110010) //baud rate is 9600 //time of single bit = 1/baud rate  = 1/9600 =104 Micro Seconds //take time delay always less than to avoid distortion in data. i have taken 102 Micro Seconds // Similarly for 19200 baud rate time = 52 Micro Seconds #include<pic.h> #define _XTAL_FREQ 16000000 void main() { TRISA=0; PORTA=0xff;  //Stop bit PORTA=0;                 //Start bit __delay_us(102); PORTA=0;                //0th bit (LSB) __delay_us(102); PORTA=0xff;            //1st bit __delay_us(102); PORTA=0;  //2nd bit __delay_us(102); PORTA=0;   //3rd bit __delay_us(102); PORTA=0xff;   //4th bit __delay_us(102); PORTA=0xff;   //5th bit __delay_us(102); PORTA=0;  //6thbit __delay_us(102); PORTA=0;  //7th bit (MSB) __delay_us(102); while(1) { PORTA=0xff; //Stop bit } } SOFT-UART Header file for pin RA0 (Transmission) #include<pic.h> #define _XTAL_FREQ 16000000 void uartsinglewrite (short int);  //you can select any data type of 8-bit.                                               //Because here we are using bit level logic for sending data void uartsinglewrite (short int a) { TRISA=0; PORTA=0;  //Start bit __delay_us(102); PORTA=a&1;  //Lsb of bit -0th bit __delay_us(102); PORTA= (a&2)>>1; //1st bit __delay_us(102); PORTA= (a&4)>>2; //2nd bit __delay_us(102); PORTA=(a&8)>>3;  //3rd bit __delay_us(102); PORTA= ((a&16)>>4); //4th bit __delay_us(102); PORTA=(a&32)>>5; //5th bit __delay_us(102); PORTA=(a&64)>>6; //6thbit __delay_us(102); PORTA=(a&128)>>7;  //7th bit __delay_us(102); PORTA=1; //Stop bit } Reception  //baud rate is 9600 // Received data is shown in PORTB #include<pic.h> #define _XTAL_FREQ 16000000 void main() { short int a=0; ADCON1=0x7; //setting PORTA as digital pins TRISA=1; TRISB=0; PORTA=0; PORTB=0; while(1) { if(RA0==0) //checks starting of signal { __delay_us(102); if(RA0==0)PORTB |= 0; else{PORTB |= 1;} __delay_us(102); if(RA0==0)PORTB |= 0; else{PORTB |= 2;} __delay_us(102); if(RA0==0)PORTB |= 0; else{PORTB |= 4;} __delay_us(102); if(RA0==0)PORTB |= 0; else{PORTB |= 8;} __delay_us(102); if(RA0==0)PORTB |= 0; else{PORTB |= 16;} __delay_us(102); if(RA0==0)PORTB |= 0; else{PORTB |= 32;} __delay_us(102); if(RA0==0)PORTB |= 0; else{PORTB |= 64;} __delay_us(102); if(RA0==0)PORTB |= 0; else{PORTB |= 128;} __delay_ms(1000); PORTB=0; }