Embeddee System & Electronics

Interfacing the AD0803 to the 8051 micro controller       This is the parallel port connector to the micro controller. The adc reading is transmitted to the serial port. Code: #include <reg51.h> #include <stdio.h> #define     adc_port    P1 sbit     rd = P2^0; sbit    wr = P2^1; sbit    cs = P2^2; sbit    intr = P2^3; //unsigned int adc; float adc1; void serial_init() {     TMOD = 0x20;     SCON = 0x50;     TH1  = 0xFD;     TR1  = 1;     TI   = 1;     RI   = 0;       }                    void delay(unsigned int i) {     unsigned int j,k;     for(j=0;j<=i;j++)     {         for(k=0;k<256;k++);     } } void adc_conv() {     cs = 0;     wr = 0;     wr = 1;     cs = 1;     while(intr); } void adc_read() {     cs = 0;     rd = 0;     adc1 = adc_port;     delay(1);     cs = 1;     rd = 1; } void main() {     serial_init();     printf("Hello World\n");     delay(5);     while(1)     {         adc_conv();         //printf("Hello\n");         adc_read

Hear the interfacing of general input device with P89V51RD2 controller        when ever the input enabled that time the output connected to the port 1 of MSB will be high. Code: #include <reg51.h> //sbit switch1 = P1^1; void delay() {     unsigned int i,j;     for(i=0;i<=256;i++)     {         for(j=0;j<=10000;j++);     } } void main(void) {         //P1 = 0xfe;     delay();     while(1)     {         if(P1==0xfe)         {             P1 = 0xf0;             delay();         }     } }

1: LED with 8051 #include <reg51.h> //sfr P1 = 0x90; //sfr P3 = 0xB0; void delay(unsigned int i) {     unsigned int j,k;     for(j=0;j<=i;j++)     {         for(k=0;k<256;k++);     } } void main(void) {     unsigned int i,j;     P1 = 0xff;     P3 = 0xff;     while(1)     {         P1 = 0x01;         delay(4000);         for(i=0;i<=10;i++)         {                P1 = P1 << 1;                delay(4000);         }         //P1 = 0x00;         delay(4000);         P1 = 0x80;         delay(4000);         for(j=0;j<=10;j++)         {             P1 = P1 >> 1;             delay(4000);         }                } }

#include <reg51.h> sbit Led0=P1^0; void delay(unsigned int i) {     unsigned int j,k;     for(j=0;j<=i;j++)     {         for(k=0;k<256;k++);     } } void main(void) {     P1 = 0xff;     while(1)     {         Led0 = 0;         delay(5);         Led0 = 1;         delay(5);     } }

The interfacing of serial communication (UART) with 8051 micro controller, with the baud rate of 9600bps.  Code: #include <reg51.h> #include <stdio.h> unsigned char c; void Serial_Init() {     TMOD = 0x20;     SCON = 0x50;     TH1  = 0xFD;     TR1  = 1;     TI   = 1;     RI   = 0;       } void delay(unsigned int i) {     unsigned int j,k;     for(j=0;j<=i;j++)     {         for(k=0;k<256;k++);     } } void main(void) {     Serial_Init();     printf("Hello World \n");     while(1)     {                 delay(5);         c = getchar();         delay(5);         //putchar(c);         delay(5);            }                    } Design Proteus: