// www.artem.ru // (C)2008 Artem Kuchin // // THIS IS NOT A COMPLETE CODE!!! // YOU MUST ADD YOU OWN LCD LIB AND REWRITE ALL CALLS TO LCD FUNCTIONS // **************************************** // *** SET FREQUENCY CORRECTLY ** #define F_CPU 1000000UL // **************************************** #include #include #include #include #define X_XTAL1 1 #define X_OE 2 #define X_WR 3 #define X_BS1 4 #define X_XA0 5 #define X_XA1 6 #define X_BS2 7 int main() { char i; unsigned char data[3]; char buf[32]; my44780 disp1; DDRD|=0b11111110; my44780_init(&disp1,MY44780_INIT_CHARSET1|MY44780_INIT_DISPLAY_ON); // display ON, blinking bottom line cursor my44780_send_command(&disp1,0b00001111); my44780_command_clear(&disp1); my44780_send_string(&disp1,"rst->gnd"); _delay_ms(5000); // toggle xtal1 at lease 6 times for(i=0;i<8;i++){ PORTD|=_BV(X_XTAL1); _delay_ms(10); PORTD&=~_BV(X_XTAL1); _delay_ms(10); } // set prog enable pins (pagel is gnd, xa0, xa1, bs1 - zero) // PD4,PD5,PD6 PORTD&=~(_BV(X_XA0)|_BV(X_XA1)|_BV(X_BS1)); PORTD|=_BV(X_WR); // write disables my44780_command_clear(&disp1); my44780_send_string(&disp1,"rst->12"); _delay_ms(5000); // read signature bytes // SET OE HIGH PORTD|=_BV(X_OE); DDRB=0xff; for(i=0;i<3;i++){ // load command //Set XA1 to 1, XA0 to 0. This enables command loading. PORTD|=_BV(X_XA1); PORTD&=~_BV(X_XA0); // Set BS1 to “0”, BS1 - PD4 PORTD&=~_BV(X_BS1); // Set DATA to command PORTB=0b00001000; // A: Load Command “0000 1000”. //Give XTAL1 a positive pulse. This loads the command., XTAL1 - PD1 PORTD|=_BV(X_XTAL1);_delay_ms(10);PORTD&=~_BV(X_XTAL1);_delay_ms(10); //load address //Set XA1 to 0, XA0 to 0. This enables address loading. // XA1 - PD6, XA0 - PD5 PORTD&=~_BV(X_XA1); PORTD&=~_BV(X_XA0); // Set BS1 to “0”, BS1 - PD4 PORTD&=~_BV(X_BS1); // Set DATA to command PORTB=i; // addr 0 //Give XTAL1 a positive pulse. This loads the address low byte , pd1 PORTD|=_BV(X_XTAL1);_delay_ms(10);PORTD&=~_BV(X_XTAL1);_delay_ms(10); // XA0=XA1=1 //PORTD|=_BV(X_XA0)|_BV(X_XA1); DDRB=0; //Set OE to “0” - OE - PD2 //the selected Signature byte can now be read at DATA. PORTD&=~_BV(X_OE); _delay_ms(10); // read data data[(int)i]=PINB; //Set OE to “1”. PORTD|=_BV(X_OE); DDRB=0xff; } my44780_command_clear(&disp1); itoa(data[0],buf,16); my44780_send_string(&disp1,buf); my44780_send_string(&disp1," "); itoa(data[1],buf,16); my44780_send_string(&disp1,buf); my44780_send_string(&disp1," "); itoa(data[2],buf,16); my44780_send_string(&disp1,buf); _delay_ms(5000); // read fuses and lock bits // load command //Set XA1 to 1, XA0 to 0. This enables command loading. PORTD|=_BV(X_XA1); PORTD&=~_BV(X_XA0); // Set BS1 to “0”, BS1 - PD4 PORTD&=~_BV(X_BS1); // Set DATA to command PORTB=0b00000100; // A: Load Command “0000 1000”. //Give XTAL1 a positive pulse. This loads the command., XTAL1 - PD1 PORTD|=_BV(X_XTAL1);_delay_ms(10);PORTD&=~_BV(X_XTAL1);_delay_ms(10); i=0; DDRB=0; PORTD&=~_BV(X_OE); // fuse low byte PORTD&=~_BV(X_BS1); PORTD&=~_BV(X_BS2); _delay_ms(10); // read data data[(int)i]=PINB; i++; // fuse high byte PORTD|=_BV(X_BS1); PORTD|=_BV(X_BS2); _delay_ms(10); // read data data[(int)i]=PINB; i++; // lock bits PORTD|=_BV(X_BS1); PORTD&=~_BV(X_BS2); _delay_ms(10); // read data data[(int)i]=PINB; // disable output PORTD|=_BV(X_OE); DDRB=0xff; my44780_command_clear(&disp1); itoa(data[0],buf,16); my44780_send_string(&disp1,buf); my44780_send_string(&disp1," "); itoa(data[1],buf,16); my44780_send_string(&disp1,buf); my44780_send_string(&disp1," "); itoa(data[2],buf,16); my44780_send_string(&disp1,buf); _delay_ms(5000); for(i=10;i>0;i--){ my44780_command_clear(&disp1); my44780_send_string(&disp1,"prog "); itoa(i,buf,10); my44780_send_string(&disp1,buf); _delay_ms(1000); } DDRD|=0b11111110; // chip erase //Set XA1 to 1, XA0 to 0. This enables command loading. PORTD|=_BV(X_XA1); PORTD&=~_BV(X_XA0); // Set BS1 to “0”, BS1 - PD4 PORTD&=~_BV(X_BS1); // Set DATA to command PORTB=0b10000000; //Give XTAL1 a positive pulse. This loads the command., XTAL1 - PD1 PORTD|=_BV(X_XTAL1);_delay_ms(10);PORTD&=~_BV(X_XTAL1);_delay_ms(10); // Give WR a negative pulse. This starts the Chip Erase. RDY/BSY goes low. PORTD&=~_BV(X_WR);_delay_ms(10);PORTD|=_BV(X_WR);_delay_ms(10); // Wait until RDY/BSY goes high before loading a new command. // load default data for FUSE low byte //Set XA1 to 1, XA0 to 0. This enables command loading. PORTD|=_BV(X_XA1); PORTD&=~_BV(X_XA0); // Set BS1 to “0”, BS1 - PD4 PORTD&=~_BV(X_BS1); // Set DATA to command PORTB=0b01000000; //Give XTAL1 a positive pulse. This loads the command., XTAL1 - PD1 PORTD|=_BV(X_XTAL1);_delay_ms(10);PORTD&=~_BV(X_XTAL1);_delay_ms(10); // load data PORTD&=~_BV(X_XA1); PORTD|=_BV(X_XA0); PORTB=0b11100001; // DEFAULT VALUE FOR LOW FUSE BYTE PORTD|=_BV(X_XTAL1);_delay_ms(10);PORTD&=~_BV(X_XTAL1);_delay_ms(10); // Set BS1 to “0” and BS2 to “0”. PORTD&=~_BV(X_BS1); PORTD&=~_BV(X_BS2); // Give WR a negative pulse. This starts the Chip Erase. RDY/BSY goes low. PORTD&=~_BV(X_WR);_delay_ms(10);PORTD|=_BV(X_WR);_delay_ms(10); // load default data for HIGH low byte //Set XA1 to 1, XA0 to 0. This enables command loading. PORTD|=_BV(X_XA1); PORTD&=~_BV(X_XA0); // Set BS1 to “0”, BS1 - PD4 PORTD&=~_BV(X_BS1); // Set DATA to command PORTB=0b01000000; //Give XTAL1 a positive pulse. This loads the command., XTAL1 - PD1 PORTD|=_BV(X_XTAL1);_delay_ms(10);PORTD&=~_BV(X_XTAL1);_delay_ms(10); // load data PORTD&=~_BV(X_XA1); PORTD|=_BV(X_XA0); PORTB=0b10011001; // DEFAULT VALUE FOR HIGH FUSE BYTE PORTD|=_BV(X_XTAL1);_delay_ms(10);PORTD&=~_BV(X_XTAL1);_delay_ms(10); // Set BS1 to “0” and BS2 to “0”. PORTD|=_BV(X_BS1); PORTD&=~_BV(X_BS2); // Give WR a negative pulse. This starts the Chip Erase. RDY/BSY goes low. PORTD&=~_BV(X_WR);_delay_ms(10);PORTD|=_BV(X_WR);_delay_ms(10); my44780_command_clear(&disp1); my44780_send_string(&disp1,"done"); while(1); }