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318 lines
6.1 KiB
318 lines
6.1 KiB
//LCD 4 Bit Mode 8051
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#include <8051.h>
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#include "delay.h"
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#define LCD P1
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#define ENABLE 0x10
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#define REG_SL 0x20
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/*
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LCD: DB4|DB5|DB6|DB7|EN |RS RW
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P1: 0 1 2 3 4 5 GND
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*/
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void lcd_reset() //Reset sequence as stated in the LCD datasheet
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{
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delay_ms(350);
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LCD = 0xFF;
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delay_ms(20);
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LCD = 0x03|ENABLE;
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LCD = 0x03;
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delay_ms(15);
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LCD = 0x03|ENABLE;
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LCD = 0x03;
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delay_ms(5);
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LCD = 0x03|ENABLE;
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LCD = 0x03;
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delay_ms(5);
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LCD = 0x02|ENABLE;
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LCD = 0x02;
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delay_ms(5);
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}
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void lcd_cmd(unsigned char cmd) //Subroutine to send command
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{
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LCD = ((cmd>>4)&0x0F)|ENABLE; //Sending higher nibble by shifting with Pulsing Enable high
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delay_us(20);
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LCD = ((cmd>>4)&0x0F);
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delay_us(20);
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LCD = (cmd & 0x0F)|ENABLE; //Sending lower nibble Enable low
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LCD = (cmd & 0x0F);
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delay_us(60);
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}
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void lcd_data (char *dat) //Subroutine to send data
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{
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while(*dat != '\0') {
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LCD = (((*dat>>4)&0x0F)|ENABLE|REG_SL); //Sending data by making RS=1
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delay_us(20);
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LCD = (((*dat>>4)&0x0F)|REG_SL);
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delay_us(20);
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LCD = ((*dat & 0x0F)|ENABLE|REG_SL);
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delay_us(20);
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LCD = ((*dat & 0x0F)|REG_SL);
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delay_us(20);
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dat++;
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}
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}
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void lcd_init ()
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{
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lcd_cmd(0x28); // 4-bit mode - 2 line - 5x7 font.
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lcd_cmd(0x0F); // Display cursor with blink.
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lcd_cmd(0x06); // Automatic Increment - No Display shift.
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lcd_cmd(0x01);
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lcd_cmd(0x02); //Clear screen and return home
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lcd_cmd(0x80); // First row first column
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}
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void achord(unsigned char count)
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{
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unsigned char y;
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unsigned char r;
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for(r=0;r<count;r++) {
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for(y=110;y>0;y--) { //0.25 sec, A 440Hz
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P3=0x55;
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delay_us(91);
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P3=0xAA;
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delay_us(91);
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}
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for(y=139;y>0;y--) { //0.25 sec, C# 554Hz
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P3=0x55;
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delay_us(72);
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P3=0xAA;
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delay_us(72);
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}
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for(y=165;y>0;y--) { //0.25 sec, E 659Hz
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P3=0x55;
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delay_us(60);
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P3=0xAA;
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delay_us(60);
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}
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for(y=220;y>0;y--) { //0.25 sec, A 880Hz
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P3=0x55;
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delay_us(44);
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P3=0xAA;
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delay_us(44);
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}
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}
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}
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void main()
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{
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//unsigned int freq;
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//unsigned int notes;
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//unsigned int cycles;
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unsigned int y;
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//unsigned int z;
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lcd_reset();
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lcd_init();
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lcd_data(" [RuhNet Labs] ");
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while(1) {
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delay_ms(1000);
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lcd_init(); //Clear screen and return home
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lcd_data(" [RuhNet Labs] ");
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P3 = 0xFF; //turn all P3 outputs on
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delay_ms(1000);
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lcd_cmd(0xC0); // Second row first column
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lcd_data("_Intel 8051 MCU_");
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delay_ms(1000);
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P3 = 0x00;
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delay_ms(1000);
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P3 = 0xFF;
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delay_ms(1000);
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lcd_cmd(0x80); // First row first column
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lcd_data(">LED/Audio Test<");
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P3 = 0x00;
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delay_ms(2000);
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lcd_cmd(0xC0); // Second row first column
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lcd_data("(Port P3: 0xAA) ");
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P3 = 0xAA;
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delay_ms(1000);
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lcd_cmd(0xC0); // Second row first column
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lcd_data("(Port P3: 0x55) ");
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P3 = 0x55;
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delay_ms(1000);
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lcd_cmd(0xC0); // Second row first column
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lcd_data("P3 rate: ~10Hz ");
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for(y=10;y>0;y--) { //0.2 seconds of 100Hz
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P3=0x55;
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delay_ms(5);
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P3=0xAA;
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delay_ms(5);
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}
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for (y=24;y>0;y--) {
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P3=0x55;
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delay_ms(50);
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P3=0xAA;
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delay_ms(50);
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}
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lcd_cmd(0xC0); // Second row first column
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lcd_data("P3 rate: ~100Hz ");
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for(y=100;y>0;y--) { //2 seconds, 100Hz
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P3=0x55;
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delay_ms(5);
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P3=0xAA;
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delay_ms(5);
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}
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lcd_cmd(0xC0);
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lcd_data("P3 rate: ~1000Hz");
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for(y=1000;y>0;y--) {
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P3=0x55;
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delay_us(40);
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P3=0xAA;
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delay_us(40);
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}
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lcd_cmd(0xC0); // Second row first column
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lcd_data("P3 rate: ~10kHz ");
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for(y=10000;y>0;y--) {
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P3=0x55;
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delay_us(4);
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P3=0xAA;
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delay_us(4);
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}
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lcd_cmd(0xC0);
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lcd_data("P3 rate: 220Hz~A");
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for(y=220;y>0;y--) {
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P3=0x55;
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delay_us(181);
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P3=0xAA;
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delay_us(181);
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}
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lcd_cmd(0xC0);
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lcd_data("P3 rate: 247Hz~B");
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for(y=247;y>0;y--) {
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P3=0x55;
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delay_us(161);
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P3=0xAA;
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delay_us(161);
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}
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lcd_cmd(0xC0);
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lcd_data("P3 rate: 262Hz~C");
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for(y=262;y>0;y--) {
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P3=0x55;
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delay_us(152);
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P3=0xAA;
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delay_us(152);
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}
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lcd_cmd(0xC0);
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lcd_data("P3 rate: 294Hz~D");
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for(y=294;y>0;y--) {
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P3=0x55;
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delay_us(136);
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P3=0xAA;
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delay_us(135);
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}
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lcd_cmd(0xC0);
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lcd_data("P3 rate: 329Hz~E");
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for(y=329;y>0;y--) {
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P3=0x55;
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delay_us(121);
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P3=0xAA;
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delay_us(121);
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}
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lcd_cmd(0xC0);
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lcd_data("P3 rate: 370Hz~F");
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for(y=370;y>0;y--) {
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P3=0x55;
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delay_us(108);
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P3=0xAA;
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delay_us(107);
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}
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lcd_cmd(0xC0);
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lcd_data("P3 rate: 415Hz~G");
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for(y=415;y>0;y--) {
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P3=0x55;
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delay_us(96);
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P3=0xAA;
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delay_us(96);
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}
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lcd_cmd(0xC0);
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lcd_data("P3 rate: 440Hz~A");
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for(y=440;y>0;y--) {
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P3=0x55;
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delay_us(91);
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P3=0xAA;
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delay_us(91);
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}
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lcd_cmd(0xC0);
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lcd_data("Wait for it... ");
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P3=0x00;
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delay_ms(500);
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lcd_cmd(0xC0); // Second row first column
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lcd_data("FruitFly 2167Hz!");
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for(y=4334;y>0;y--) { //2 seconds
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P3=0x55;
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delay_us(18);
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P3=0xAA;
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delay_us(18);
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}
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lcd_cmd(0x80);
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lcd_data("~Chord: A Major");
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lcd_cmd(0xC0); // Second row first column
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lcd_data("A -> C# -> E-> A");
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for(y=440;y>0;y--) { //1 sec, A 440Hz
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P3=0x55;
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delay_us(91);
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P3=0xAA;
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delay_us(91);
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}
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for(y=554;y>0;y--) { //1 sec, C# 554Hz
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P3=0x55;
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delay_us(72);
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P3=0xAA;
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delay_us(72);
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}
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for(y=659;y>0;y--) { //1 sec, E 659Hz
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P3=0x55;
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delay_us(60);
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P3=0xAA;
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delay_us(60);
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}
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for(y=880;y>0;y--) { //1 sec, A 880Hz
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P3=0x55;
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delay_us(44);
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P3=0xAA;
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delay_us(44);
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}
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achord(4);
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lcd_cmd(0x80);
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lcd_data(" -The|End- ");
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lcd_cmd(0xC0); // Second row first column
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lcd_data("https://ruel.io ");
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//delay_ms(1000);
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/*
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//Doesn't work for some reason:
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//Maintins 100Hz indefinitely... :-(
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freq=399;
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z=3985;
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for(notes=398;notes>2;notes--) {
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freq--;
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z=z-5;
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for(cycles=(z/40);cycles>0;cycles--) {
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//for(cycles=freq;cycles>0;cycles--) {
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P3=0x55;
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delay_us(freq);
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P3=0xAA;
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delay_us(freq);
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}
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}
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*/
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}
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}
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