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I am using 8051 Microcontroller and connecting it with Bluetooth and LCD. I am able to send data from mobile to LCD Display and can also print pre-written lines in code on mobile Bluetooth Terminal and LCD Display. How can I write AT Commands in the code, so that I can access the GPIO Pins of Bluetooth ?
/* Port 2 rs, rw, en of LCD Port 1 LCD Output Port 3 Bluetooth */
#include<reg51.h> void Baud(); sbit rs = P2^5; sbit rw = P2^6; sbit en = P2^7; void lcdcmd(unsigned char ); void lcddata(unsigned char); void msdelay(unsigned char); void run(unsigned char *l); char String[10]="SCIENTECH"; void SerTx(unsigned char); void at_command_send(unsigned char *str); void enter(); int i;
unsigned char a; unsigned char var_tfr;
void EINT() interrupt 4 { a=SBUF; lcdcmd(0xcd); lcddata(a); // Put value of Serial Buffer at Port 1, which is LCD
RI=0; TI=0; }
void main() { Baud(); lcdcmd(0x38); // 2 lines and 5 x 7 matrix lcdcmd(0x01); // Clear Display lcdcmd(0x0E); // Display on, cursor blinking lcdcmd(0x06); // Increment Cursor lcdcmd(0x80);
run("BT - Interface : "); lcdcmd(0xc0); run("Data Receive: ");
at_command_send("AT+AB GPIOConfig 2 'O'"); enter(); msdelay(1); at_command_send("AT+AB GPIOWrite 2 1"); enter(); IE=0x90; while(1) { msdelay(1); } }
void at_command_send(unsigned char *str) { EA=0; while(*str!='\0') { TI=0; SBUF=(*str++); while(!TI); TI=0; } } void lcdcmd(unsigned char value) { P1 = value; rs=0; rw=0; en=1; msdelay(10); en=0; }
//void SerTx(unsigned char value1) //{ // SBUF=value1; // while(TI==0); // TI=0; // // RI=0; //}
void lcddata(unsigned char value) { P1 = value; rs=1; rw=0; en=1; msdelay(1); en=0;
}
void msdelay(unsigned char time) { unsigned int i,j; for(i=0; i<time; i++) { for (j=0; j<1275; j++); } }
void run(unsigned char *l) { while(*l) { var_tfr=*l++; P1= var_tfr; SBUF=var_tfr; rs=1; rw=0; en=1; msdelay(10); en=0; while(TI==0); TI=0; } }
void Baud() { TMOD=0x20; // Timer 1, Mode 2 SCON=0x50; // Mode 1 TH1=0xFD; // 9600 TR1=1; } void enter() {
SBUF=0x0a; while(TI==0); TI=0; RI=0; SBUF=0x0d; while(TI==0); TI=0; RI=0;
www.danlhenry.com/.../keil_code.png
/* Port 2 rs, rw, en of LCD Port 1 LCD Output Port 3 Bluetooth */ #include<reg51.h> void Baud(); sbit rs = P2^5; sbit rw = P2^6; sbit en = P2^7; void lcdcmd(unsigned char ); void lcddata(unsigned char); void msdelay(unsigned char); void run(unsigned char *l); char String[10]="SCIENTECH"; void SerTx(unsigned char); void at_command_send(unsigned char *str); void enter(); int i; unsigned char a; unsigned char var_tfr; void EINT() interrupt 4 { a=SBUF; lcdcmd(0xcd); lcddata(a); // Put value of Serial Buffer at Port 1, which is LCD RI=0; TI=0; } void main() { Baud(); lcdcmd(0x38); // 2 lines and 5 x 7 matrix lcdcmd(0x01); // Clear Display lcdcmd(0x0E); // Display on, cursor blinking lcdcmd(0x06); // Increment Cursor lcdcmd(0x80); run("BT - Interface : "); lcdcmd(0xc0); run("Data Receive: "); at_command_send("AT+AB GPIOConfig 2 'O'"); enter(); msdelay(1); at_command_send("AT+AB GPIOWrite 2 1"); enter(); IE=0x90; while(1) { msdelay(1); } } void at_command_send(unsigned char *str) { EA=0; while(*str!='\0') { TI=0; SBUF=(*str++); while(!TI); TI=0; } } void lcdcmd(unsigned char value) { P1 = value; rs=0; rw=0; en=1; msdelay(10); en=0; } //void SerTx(unsigned char value1) //{ // SBUF=value1; // while(TI==0); // TI=0; // // RI=0; //} void lcddata(unsigned char value) { P1 = value; rs=1; rw=0; en=1; msdelay(1); en=0; } void msdelay(unsigned char time) { unsigned int i,j; for(i=0; i<time; i++) { for (j=0; j<1275; j++); } } void run(unsigned char *l) { while(*l) { var_tfr=*l++; P1= var_tfr; SBUF=var_tfr; rs=1; rw=0; en=1; msdelay(10); en=0; while(TI==0); TI=0; } } void Baud() { TMOD=0x20; // Timer 1, Mode 2 SCON=0x50; // Mode 1 TH1=0xFD; // 9600 TR1=1; } void enter() { SBUF=0x0a; while(TI==0); TI=0; RI=0; SBUF=0x0d; while(TI==0); TI=0; RI=0; }
What BlueTooth part? What does the manual/data sheet describe?