sbit rs=p2^6； //bit definition defines the sixth bit of P2 as RS, and then the operation of RS is equivalent to the operation of P2^6.
sbit rw=p2^5； //ditto
sbit e=p2^7； //ditto
Unsigned characters are busy; //Define the variable busy as an unsigned character variable.
Void delay(unsigned char asf) // This is a delay function, and asf in brackets is the delay time.
{ while(ASF-)； }//When asf>= 1 has been in this loop until ASF.
Lcd_busy()// This is to write a function, but it needs to be preceded by void to become void lcd_busy ().
{ RS = 0； RW = 1； e = 1； P0 = 0X80 delay (0xff); //Assign 0 to RS, 1 to RW, 1 to E, and output 0x80 at P0 port is delayed by 0xff for such a long time.
If(P0==0X00)//if Judgment Statement When P0=0x00, execute the following busy=0x00 statement.
Busy = 0x00// Assign 0 to busy.
Else // if the above if judgment is not true, execute busy = 0x00 1.
busy = 0x 0 1； //ditto
}
Write_cmd(unsigned char cmd)// Creates a subfunction whose slogan defines cmd as an unsigned character variable.
{
Busy =1; //ditto
While(busy) Because busy= 1, it will always execute the following statement in braces. You are missing a bracket here.
{
LCD _ busy()； //Call the lcd_busy () function on it.
RS = 0； RW = 0； e = 0； P0 = cmd// The first three are assignment statements, as above, followed by giving the value of cmd to P0.
Delay (0xff); The delay function is as above
e = 1； //General allocation
Delay (0xff); The delay function is as above
e = 0； //General assignment
}
Lcd_cmd()// Create a subfunction as above.
{
write _ cmd(0x 38)； Call the write_cmd(unsigned char cmd) function above, where cmd is assigned 0x38.
write _ cmd(0x 08)； //ditto
write _ cmd(0x 0 1)； //ditto
write _ cmd(0x 06)； //ditto
write _ cmd(0x0c)； //ditto
write _ cmd(0x 84)； //ditto
}
Lcd_date()// This function refers to lcd_busy () above.
{
Busy =1;
When (busy)
LCD _ busy()；
RS = 1； RW = 0； e = 0； P0 = 0X62
Delay (0xff); e = 1； Delay (0xff); e = 0；
}
Main () main function
{ LCD _ cmd()； LCD _ date()； while( 1)； } Call LCD _ cmd () respectively; LCD _ date()； These two subfunctions. And (1) is an infinite loop, and the function has been executed until now.