NHD-0216KZW/ 0216SZW/ 0220DZW/ 0420DZW - (8-bit)

Example code for Newhaven OLED display NHD-0216KZW/ 0220DZW/ 0420DZW - (8-bit)

#include <reg52.h>
//---------------------------------------------------------

sbit R_S = P3^0;
sbit R_W = P3^7;
sbit E   = P3^4;

char const text1[] = {"Newhaven Display"};
char const text2[] = {"Character LCD   "};

void Delayms(int n){
	int i;
	int j;
	for (i=0;i<n;i++)
		for (j=0;j<1000;j++)
		{;}
}

void command(char i){
	P1 = i;
	R_S =0;
	R_W =0;
	E  = 1;
	//Delayms(5);
    E  = 0;
}
void write(char i){
	P1 = i;
	R_S =1;
	R_W =0;
	E  = 1;
	//Delayms(5);
	E  = 0;
}

void init(){
	E = 0;
	//Delayms(5);
	command(0x30);
	//Delayms(100);
	command(0x30);
	//Delayms(10);
	command(0x30);
	//Delayms(10);
	command(0x38);
	command(0x10);
	command(0x0c);
	command(0x06);
}

void disp_pic(){
	int i;
	command(0x02);
	for (i=0;i<16;i++){
		write(text1[i]);
	}
	 command(0xC0);
	 for (i=0;i<16;i++){
		write(text2[i]);
	}
}


void main(void) {
	P1=0;
	P3=0;
	init();
	command(0x01);
	//Delayms(50);
	while(1){
		disp_pic();
		//Delayms(1000);
	}
}