Source code of LCD2004 driven by ATmega16

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Source code of LCD2004 driven by ATmega16 [Copy link]

* ===========================================================
20x4 character LCD main program, compilation software (ICCAVR_6.31) CPU internal
crystal oscillator 8M data lines
B0~B7 are connected to PORTB, E=D7 RW = D6 RS = D5
=== ... PB0|--------7|D0 LCD20x4 | PB1|--------8|D1 | PB2|--------9|D2 | PB3|-------10|D3 | PB4|-------11|D4 | PB5|-------12|D5 | PB6|-------13|D6 | PB7|-------14|D7 | | | | | --15|+LED | | --16|-LED | _______________| |______________| ============================================================*/ #include<ioM16V.h> //CPU_ATmmega16L #define RS_H asm("sbi 0x12,5") //RS is set to high level #define RS_L asm("cbi 0x12,5") //RS is set to low level #define RW_H asm("sbi 0x12,6") //RW is set to high level #define RW_L asm("cbi 0x12,6") //RW is set to low level #define E_H asm("sbi 0x12,7") //E is set to high level #define E_L asm("cbi 0x12,7") //E is set to low level //========================================================== //Microsecond delay program void delay_us(int time) { do { time--; } while (time > 1); } //========================================================= //Millisecond delay program void delay_ms(unsigned int time) { while(time != 0) { delay_us(1000); time--; } } //=========================================================== //Read whether the LCD is in internal operation (busy) status char Lcd_Busy() { char r; DDRB = 0x00; //Port B is set to input mode E_L;RS_L;RW_H; //E=0(enable),RS=0(command),RW=1(read) delay_us(2); //LCD delay subroutine E_H; delay_us(2); //LCD delay subroutine r = PINB & 0x80; //Read the eighth bit of lcd_data E_L;
































































DDRB=0xff; //Port B is set to output modereturn
r; //Read result and return
}

//==========================================================
//Send command program to LCDvoid
Lcd_Command(unsigned char Command)
{
while(Lcd_Busy()); //Judge whether LCD is in internal operation stateE_L
;RS_L;RW_L; //E=0(enable),RS=0(command),RW=0(write)
delay_us(2); //LCD delay subroutine
E_H;
PORTB = Command; //Send command to
LCDdelay_us(2); //LCD delay subroutineE_L
;
}

//=======================================================
//Program to write a character to the LCD
void Lcd_Write(unsigned char Data)
{
while(Lcd_Busy()); //Judge whether the LCD is in internal operation status
E_L;RS_H;RW_L; //E=0(enable),RS=1(data),RW=0(write)
delay_us(2); //LCD delay subroutine
E_H;
PORTB = Data; //Write a character to the LCD
delay_us(2); //LCD delay subroutine
E_L;
}


/*==========================================================
LCD line 1 displays address 1~20 (0x80~0x93)
LCD line 2 displays address 1~20 (0xc0~
0xd3) LCD line 3 displays address 1~20 ( 0x94 ~0xa7) LCD line 4 displays address 1
~20 (0xd4~ 0xe7 ) ===
... Lcd_Command(0x38); // Lcd_Command(0x08); //Set the display off Lcd_Command(0x01); //Clear the display Lcd_Command(0x06); //Set the LCD to automatically increase the AC by 1 after receiving 1Byte of data Lcd_Command(0x0C); //Set the cursor, 0x0c=no display, 0x0d=flash display. } //=========================================================== //Write ASCII string program void asc_tran(unsigned char *asc) { while((*asc) != 0) //Judge whether the word ends { Lcd_Write(*asc); //Write a string to the LCD asc++; //Move to the next character } } //======================================================== //Test main LCD main program void main() { Lcd_Init(); //Initialize LCD while(1) { Lcd_Command(0x83); //Set display address asc_tran("-----@_@------"); //Display string Lcd_Command(0x97); //Set display address asc_tran("www.ouravr.com"); //Display string delay_ms(1000); //Delay 1 second Lcd_Command(0x01); //Clear display Lcd_Command(0x83); //Set display address









































asc_tran("-----^_^------"); //Display string
Lcd_Command(0x94); //Set display address
asc_tran("http://59.36.96.196"); //Display string
delay_ms(1000); //Delay
Lcd_Command(0x01); //Clear display
}
}

yzwangrong

You can use it directly! You are such a good person @! Selfless person!