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| #include <8051.h>
#define true 1
#define false 0
#define HIGH 1
#define LOW 0
#define LCD1602_E P2_6
#define LCD1602_RS P2_4
#define LCD1602_RW P2_5
unsigned char line1[] = " hello world! ";
unsigned char line2[] = "~!@#$%^&*()_+[]?";
void delay(unsigned int multiple)
{
unsigned int i;
for(; multiple>0; multiple--)
for(i=100; i>0; i--);
}
void writeCommand(unsigned char command)
{
LCD1602_E = LOW;
LCD1602_RS = LOW;
LCD1602_RW = LOW;
P0 = command;
delay(10);
LCD1602_E = HIGH;
delay(20);
LCD1602_E = LOW;
}
void writeData(unsigned char data)
{
LCD1602_E = LOW;
LCD1602_RS = HIGH;
LCD1602_RW = LOW;
P0 = data;
delay(10);
LCD1602_E = HIGH;
delay(20);
LCD1602_E = LOW;
}
void initLCD1602()
{
delay(300);
writeCommand(0x38);
delay(100);
writeCommand(0x38);
delay(100);
writeCommand(0x38);
writeCommand(0x38);
writeCommand(0x08);
writeCommand(0x01);
writeCommand(0x06);
writeCommand(0x0C);
}
void setup()
{
unsigned char i;
initLCD1602();
for(i=0; i<16; i++)
{
writeCommand(0x80 + i);
writeData(line1[i]);
delay(10);
}
for(i=0; i<16; i++)
{
writeCommand(0x80 + 0x40 + i);
writeData(line2[i]);
delay(10);
}
}
void loop()
{
}
void main()
{
setup();
while(true) loop();
}
|
