【Arduino 动手做】DIY Arduino全息矩阵时钟
这是创建全息图的最简单方法，其中光源和屏幕以 45 度角放置。这是我的一系列不寻常的 DIY 时钟中的另一个，这次是基于全息效果实现的。看起来真的非常有趣，你会感觉到数字漂浮在空中。
否则，这是创建全息图最简单的方法，其中光源和屏幕以45度角放置。当我们有文本或数字信息时，我们需要知道光源的信息应该是原始图像的镜像，我们应该在屏幕上看到原始图像。
对于光源，我使用了一个非常简单的矩阵时钟，它实际上是我之前的一个项目“ Arduino Nano mini LED 矩阵时钟”的修改版本，我修改了原始代码以获得镜像。
【Arduino 动手做】DIY Arduino全息矩阵时钟
正如我提到的，时钟的构建非常简单，它由几个组件组成：Arduino nano微控制器
DS3231实时时钟模块
8x32 LED矩阵模块
和两个按钮
【Arduino 动手做】DIY Arduino全息矩阵时钟
这个小钟有各种各样的表面、工作模式和其他选项，您将在视频的后续部分看到。对于该设备的机械结构，必须遵守几条规则：
- 通过改变光源和屏幕之间的距离，全息图像的高度会发生变化，因此我们必须通过实验确定这个距离。
如果按照上述建议设置了信号源和屏幕，全息图像就会出现在屏幕中间。我们可以通过两个按钮来调整各种选项。
我从一开始就对这个设备进行了改造，使其也能显示来自智能手机的全息图。为此，需要将智能手机的灯光调到最大，然后选择专门为全息图演示设计的视频。这些视频通常采用黑色背景，以便更突出全息图效果。
【Arduino 动手做】DIY Arduino全息矩阵时钟
项目代码/***********************************************************************
Mini Clock v1.0, Jul 2014 by Nick Hall
Distributed under the terms of the GPL.
For help on how to build the clock see my blog:
http://123led.wordpress.com/
Tested on IDE v1.6.5
modified by Mirko Pavleski May 2023
***********************************************************************/
//include libraries:
#include "LedControl.h"
#include <FontLEDClock.h> // Font library
#include <Wire.h> // DS1307 clock
#include "RTClib.h" // DS1307 clock
#include <Button.h> // Button library by Alexander Brevig
// Setup LED Matrix
// pin 10 is connected to the DataIn on the display
// pin 12 is connected to the CLK on the display
// pin 11 is connected to LOAD on the display(cs)
LedControl lc = LedControl(10, 12, 11, 4); //sets the 3 pins as 12, 11 & 10 and then sets 4 displays (max is 8 displays)
//global variables
byte intensity = 7; // Default intensity/brightness (0-15)
byte clock_mode = 0; // Default clock mode. Default = 0 (basic_mode)
bool random_mode = 0; // Define random mode - changes the display type every few hours. Default = 0 (off)
byte old_mode = clock_mode; // Stores the previous clock mode, so if we go to date or whatever, we know what mode to go back to after.
bool ampm = 0; // Define 12 or 24 hour time. 0 = 24 hour. 1 = 12 hour
byte change_mode_time = 0; // Holds hour when clock mode will next change if in random mode.
unsigned long delaytime = 500; // We always wait a bit between updates of the display
int rtc; // Holds real time clock output
char days = {
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
}; //day array - used in slide, basic_mode and jumble modes (The DS1307 outputs 1-7 values for day of week)
char daysfull = {
"Sunday", "Monday", "Tuesday", "Wed", "Thursday", "Friday", "Saturday"
};
char suffix = {
"st", "nd", "rd", "th"
};//date suffix array, used in slide, basic_mode and jumble modes. e,g, 1st 2nd ...
//define constants
#define NUM_DISPLAY_MODES 3 // Number display modes (conting zero as the first mode)
#define NUM_SETTINGS_MODES 4 // Number settings modes = 6 (conting zero as the first mode)
#define SLIDE_DELAY 20 // The time in milliseconds for the slide effect per character in slide mode. Make this higher for a slower effect
#define cls clear_display // Clear display
RTC_DS1307 ds1307; // Create RTC object
Button buttonA = Button(2, BUTTON_PULLUP); // Setup button A (using button library)
Button buttonB = Button(3, BUTTON_PULLUP); // Setup button B (using button library)
void setup() {
digitalWrite(2, HIGH); // turn on pullup resistor for button on pin 2
digitalWrite(3, HIGH); // turn on pullup resistor for button on pin 3
digitalWrite(4, HIGH); // turn on pullup resistor for button on pin 4
Serial.begin(9600); //start serial
//initialize the 4 matrix panels
//we have already set the number of devices when we created the LedControl
int devices = lc.getDeviceCount();
//we have to init all devices in a loop
for (int address = 0; address < devices; address++) {
/*The MAX72XX is in power-saving mode on startup*/
lc.shutdown(address, false);
/* Set the brightness to a medium values */
lc.setIntensity(address, intensity);
/* and clear the display */
lc.clearDisplay(address);
}
//Setup DS1307 RTC
#ifdef AVR
Wire.begin();
#else
Wire1.begin(); // Shield I2C pins connect to alt I2C bus on Arduino
#endif
ds1307.begin(); //start RTC Clock
if (! ds1307.isrunning()) {
Serial.println("RTC is NOT running!");
ds1307.adjust(DateTime(__DATE__, __TIME__));// sets the RTC to the date & time this sketch was compiled
}
//Show software version & hello message
printver();
//enable red led
digitalWrite(13, HIGH);
}
void loop() {
//run the clock with whatever mode is set by clock_mode - the default is set at top of code.
switch (clock_mode){
case 0:
basic_mode();
break;
case 1:
small_mode();
break;
case 2:
slide();
break;
case 3:
word_clock();
break;
case 4:
setup_menu();
break;
}
}
//plot a point on the display
void plot (byte x, byte y, byte val) {
//select which matrix depending on the x coord
byte address;
if (x >= 0 && x <= 7) {
address = 3;
}
if (x >= 8 && x <= 15){
address = 2;
x = x - 8;
}
if (x >= 16 && x <= 23) {
address = 1;
x = x - 16;
}
if (x >= 24 && x <= 31) {
address = 0;
x = x - 24;
}
if (val == 1) {
// lc.setLed(address, y, x, true);
lc.setLed(address, 7-y, x, true);
} else {
//lc.setLed(address, y, x, false);
lc.setLed(address, 7-y, x, false);
}
}
//clear screen
void clear_display() {
for (byte address = 0; address < 4; address++) {
lc.clearDisplay(address);
}
}
//fade screen down
void fade_down() {
//fade from global intensity to 1
for (byte i = intensity; i > 0; i--) {
for (byte address = 0; address < 4; address++) {
lc.setIntensity(address, i);
}
delay(30); //change this to change fade down speed
}
clear_display(); //clear display completely (off)
//reset intentsity to global val
for (byte address = 0; address < 4; address++) {
lc.setIntensity(address, intensity);
}
}
//power up led test & display software version number
void printver() {
byte i = 0;
char ver_a = "Vers 1.0";
char ver_b = " Hello! ";
//test all leds.
for (byte x = 0; x <= 31; x++) {
for (byte y = 0; y <= 7; y++) {
plot(x, y, 1);
}
}
delay(500);
fade_down();
while (ver_a) {
puttinychar((i * 4), 1, ver_a);
delay(35);
i++;
}
delay(700);
fade_down();
i = 0;
while (ver_b) {
puttinychar((i * 4), 1, ver_b);
delay(35);
i++;
}
delay(700);
fade_down();
}
// puttinychar
// Copy a 3x5 character glyph from the myfont data structure to display memory, with its upper left at the given coordinate
// This is unoptimized and simply uses plot() to draw each dot.
void puttinychar(byte x, byte y, char c)
{
byte dots;
if (c >= 'A' && c <= 'Z' || (c >= 'a' && c <= 'z') ) {
c &= 0x1F; // A-Z maps to 1-26
}
else if (c >= '0' && c <= '9') {
c = (c - '0') + 32;
}
else if (c == ' ') {
c = 0; // space
}
else if (c == '.') {
c = 27; // full stop
}
else if (c == ':') {
c = 28; // colon
}
else if (c == '\'') {
c = 29; // single quote mark
}
else if (c == '!') {
c = 30; // single quote mark
}
else if (c == '?') {
c = 31; // single quote mark
}
for (byte col = 0; col < 3; col++) {
dots = pgm_read_byte_near(&mytinyfont);
for (char row = 0; row < 5; row++) {
if (dots & (16 >> row))
plot(x + col, y + row, 1);
else
plot(x + col, y + row, 0);
}
}
}
void putnormalchar(byte x, byte y, char c)
{
byte dots;
//if (c >= 'A' && c <= 'Z' || (c >= 'a' && c <= 'z') ) {
// c &= 0x1F; // A-Z maps to 1-26
//}
if (c >= 'A' && c <= 'Z' ) {
c &= 0x1F; // A-Z maps to 1-26
}
else if (c >= 'a' && c <= 'z') {
c = (c - 'a') + 41; // A-Z maps to 41-67
}
else if (c >= '0' && c <= '9') {
c = (c - '0') + 31;
}
else if (c == ' ') {
c = 0; // space
}
else if (c == '.') {
c = 27; // full stop
}
else if (c == '\'') {
c = 28; // single quote mark
}
else if (c == ':') {
c = 29; // clock_mode selector arrow
}
else if (c == '>') {
c = 30; // clock_mode selector arrow
}
else if (c >= -80 && c <= -67) {
c *= -1;
}
for (char col = 0; col < 5; col++) {
dots = pgm_read_byte_near(&myfont);
for (char row = 0; row < 7; row++) {
//check coords are on screen before trying to plot
//if ((x >= 0) && (x <= 31) && (y >= 0) && (y <= 7)){
if (dots & (64 >> row)) { // only 7 rows.
plot(x + col, y + row, 1);
} else {
plot(x + col, y + row, 0);
}
//}
}
}
}
//small_mode
//show the time in small 3x5 characters with seconds display
void small_mode() {
char textchar; // the 16 characters on the display
byte mins = 100; //mins
byte secs = rtc; //seconds
byte old_secs = secs; //holds old seconds value - from last time seconds were updated o display - used to check if seconds have changed
cls();
//run clock main loop as long as run_mode returns true
while (run_mode()) {
get_time();
//check for button press
if (buttonA.uniquePress()) {
switch_mode();
return;
}
if (buttonB.uniquePress()) {
display_date();
return;
}
//if secs changed then update them on the display
secs = rtc;
if (secs != old_secs) {
//secs
char buffer;
itoa(secs, buffer, 10);
//fix - as otherwise if num has leading zero, e.g. "03" secs, itoa coverts this to chars with space "3 ".
if (secs < 10) {
buffer = buffer;
buffer = '0';
}
puttinychar( 20, 1, ':'); //seconds colon
puttinychar( 24, 1, buffer); //seconds
puttinychar( 28, 1, buffer); //seconds
old_secs = secs;
}
//if minute changes change time
if (mins != rtc) {
//reset these for comparison next time
mins = rtc;
byte hours = rtc;
if (hours > 12) {
hours = hours - ampm * 12;
}
if (hours < 1) {
hours = hours + ampm * 12;
}
//byte dow= rtc; // the DS1307 outputs 0 - 6 where 0 = Sunday0 - 6 where 0 = Sunday.
//byte date = rtc;
//set characters
char buffer;
itoa(hours, buffer, 10);
//fix - as otherwise if num has leading zero, e.g. "03" hours, itoa coverts this to chars with space "3 ".
if (hours < 10) {
buffer = buffer;
//if we are in 12 hour mode blank the leading zero.
if (ampm) {
buffer = ' ';
}
else {
buffer = '0';
}
}
//set hours chars
textchar = buffer;
textchar = buffer;
textchar = ':';
itoa (mins, buffer, 10);
if (mins < 10) {
buffer = buffer;
buffer = '0';
}
//set mins characters
textchar = buffer;
textchar = buffer;
//do seconds
textchar = ':';
buffer;
secs = rtc;
itoa(secs, buffer, 10);
//fix - as otherwise if num has leading zero, e.g. "03" secs, itoa coverts this to chars with space "3 ".
if (secs < 10) {
buffer = buffer;
buffer = '0';
}
//set seconds
textchar = buffer;
textchar = buffer;
byte x = 0;
byte y = 0;
//print each char
for (byte x = 0; x < 6 ; x++) {
puttinychar( x * 4, 1, textchar);
}
}
delay(50);
}
fade_down();
}
// basic_mode()
// show the time in 5x7 characters
void basic_mode()
{
cls();
char buffer; //for int to char conversion to turn rtc values into chars we can print on screen
byte offset = 0;//used to offset the x postition of the digits and centre the display when we are in 12 hour mode and the clock shows only 3 digits. e.g. 3:21
byte x, y; //used to draw a clear box over the left hand "1" of the display when we roll from 12:59 -> 1:00am in 12 hour mode.
//do 12/24 hour conversion if ampm set to 1
byte hours = rtc;
if (hours > 12) {
hours = hours - ampm * 12;
}
if (hours < 1) {
hours = hours + ampm * 12;
}
//do offset conversion
if (ampm && hours < 10) {
offset = 2;
}
//set the next minute we show the date at
//set_next_date();
// initially set mins to value 100 - so it wll never equal rtc on the first loop of the clock, meaning we draw the clock display when we enter the function
byte secs = 100;
byte mins = 100;
int count = 0;
//run clock main loop as long as run_mode returns true
while (run_mode()) {
//get the time from the clock chip
get_time();
//check for button press
if (buttonA.uniquePress()) {
switch_mode();
return;
}
if (buttonB.uniquePress()) {
display_date();
return;
}
//check whether it's time to automatically display the date
//check_show_date();
//draw the flashing : as on if the secs have changed.
if (secs != rtc) {
//update secs with new value
secs = rtc;
//draw :
plot (15 - offset, 2, 1); //top point
plot (15 - offset, 5, 1); //bottom point
count = 400;
}
//if count has run out, turn off the :
if (count == 0) {
plot (15 - offset, 2, 0); //top point
plot (15 - offset, 5, 0); //bottom point
}
else {
count--;
}
//re draw the display if button pressed or if mins != rtc i.e. if the time has changed from what we had stored in mins, (also trigggered on first entering function when mins is 100)
if (mins != rtc) {
//update mins and hours with the new values
mins = rtc;
hours = rtc;
//adjust hours of ampm set to 12 hour mode
if (hours > 12) {
hours = hours - ampm * 12;
}
if (hours < 1) {
hours = hours + ampm * 12;
}
itoa(hours, buffer, 10);
//if hours < 10 the num e.g. "3" hours, itoa coverts this to chars with space "3 " which we dont want
if (hours < 10) {
buffer = buffer;
buffer = '0';
}
//print hours
//if we in 12 hour mode and hours < 10, then don't print the leading zero, and set the offset so we centre the display with 3 digits.
if (ampm && hours < 10) {
offset = 2;
//if the time is 1:00am clear the entire display as the offset changes at this time and we need to blank out the old 12:59
if ((hours == 1 && mins == 0) ) {
cls();
}
}
else {
//else no offset and print hours tens digit
offset = 0;
//if the time is 10:00am clear the entire display as the offset changes at this time and we need to blank out the old 9:59
if (hours == 10 && mins == 0) {
cls();
}
putnormalchar(1,0, buffer);
}
//print hours ones digit
putnormalchar(7 - offset, 0, buffer);
//print mins
//add leading zero if mins < 10
itoa (mins, buffer, 10);
if (mins < 10) {
buffer = buffer;
buffer = '0';
}
//print mins tens and ones digits
putnormalchar(19 - offset, 0, buffer);
putnormalchar(25 - offset, 0, buffer);
}
}
fade_down();
}
//like basic_mode but with slide effect
void slide() {
byte digits_old = {99, 99, 99, 99}; //old valueswe store time in. Set to somthing that will never match the time initially so all digits get drawn wnen the mode starts
byte digits_new; //new digits time will slide to reveal
byte digits_x_pos = {25, 19, 7, 1}; //x pos for which to draw each digit at
char old_char; //used when we use itoa to transpose the current digit (type byte) into a char to pass to the animation function
char new_char; //used when we use itoa to transpose the new digit (type byte) into a char to pass to the animation function
//old_chars - stores the 5 day and date suffix chars on the display. e.g. "mon" and "st". We feed these into the slide animation as the current char when these chars are updated.
//We sent them as A initially, which are used when the clocl enters the mode and no last chars are stored.
//char old_chars = "AAAAA";
//plot the clock colon on the display
cls();
putnormalchar( 13, 0, ':');
byte old_secs = rtc; //store seconds in old_secs. We compare secs and old secs. WHen they are different we redraw the display
//run clock main loop as long as run_mode returns true
while (run_mode()) {
get_time();
//check for button press
if (buttonA.uniquePress()) {
switch_mode();
return;
}
if (buttonB.uniquePress()) {
display_date();
return;
}
//if secs have changed then update the display
if (rtc != old_secs) {
old_secs = rtc;
//do 12/24 hour conversion if ampm set to 1
byte hours = rtc;
if (hours > 12) {
hours = hours - ampm * 12;
}
if (hours < 1) {
hours = hours + ampm * 12;
}
//split all date and time into individual digits - stick in digits_new array
//rtc = secs //array pos and digit stored
//digits_new = (rtc%10); //0 - secs ones
//digits_new = ((rtc/10)%10); //1 - secs tens
//rtc = mins
digits_new = (rtc % 10); //2 - mins ones
digits_new = ((rtc / 10) % 10);//3 - mins tens
//rtc = hours
digits_new = (hours % 10); //4 - hour ones
digits_new = ((hours / 10) % 10);//5 - hour tens
//rtc = date
//digits_new = (rtc%10); //6 - date ones
//digits_new = ((rtc/10)%10); //7 - date tens
//draw initial screen of all chars. After this we just draw the changes.
//compare digits 0 to 3 (mins and hours)
for (byte i = 0; i <= 3; i++) {
//see if digit has changed...
if (digits_old != digits_new) {
//run 9 step animation sequence for each in turn
for (byte seq = 0; seq <= 8 ; seq++) {
//convert digit to string
itoa(digits_old, old_char, 10);
itoa(digits_new, new_char, 10);
//if set to 12 hour mode and we're on digit 2 (hours tens mode) then check to see if this is a zero. If it is, blank it instead so we get 2.00pm not 02.00pm
if (ampm && i == 3) {
if (digits_new == 0) {
new_char = ' ';
}
if (digits_old == 0) {
old_char = ' ';
}
}
//draw the animation frame for each digit
slideanim(digits_x_pos, 0, seq, old_char, new_char);
delay(SLIDE_DELAY);
}
}
}
/*
//compare date digit 6 (ones) and (7) tens - if either of these change we need to update the date line. We compare date tens as say from Jan 31 -> Feb 01 then ones digit doesn't change
if ((digits_old != digits_new) || (digits_old != digits_new)) {
//change the day shown. Loop below goes through each of the 3 chars in turn e.g. "MON"
for (byte day_char = 0; day_char <=2 ; day_char++){
//run the anim sequence for each char
for (byte seq = 0; seq <=8 ; seq++){
//the day (0 - 6) Read this number into the days char array. the seconds number in the array 0-2 gets the 3 chars of the day name, e.g. m o n
slideanim(6*day_char,8,seq,old_chars,days]); //6 x day_char gives us the x pos for the char
delay(SLIDE_DELAY);
}
//save the old day chars into the old_chars array at array pos 0-2. We use this next time we change the day and feed it to the animation as the current char. The updated char is fed in as the new char.
old_chars = days];
}
//change the date tens digit (if needed) and ones digit. (the date ones digit wil alwaus change, but putting this in the 'if' loop makes it a bit neater code wise.)
for (byte i = 7; i >= 6; i--){
if (digits_old != digits_new) {
for (byte seq = 0; seq <=8 ; seq++){
itoa(digits_old,old_char,10);
itoa(digits_new,new_char,10);
slideanim(digits_x_pos,8,seq,old_char,new_char);
delay(SLIDE_DELAY);
}
}
}
//print the day suffix "nd" "rd" "th" etc. First work out date 2 letter suffix - eg st, nd, rd, th
byte s = 3; //the pos to read our suffix array from.
byte date = rtc;
if(date == 1 || date == 21 || date == 31) {
s = 0;
}
else if (date == 2 || date == 22) {
s = 1;
}
else if (date == 3 || date == 23) {
s = 2;
}
for (byte suffix_char = 0; suffix_char <=1 ; suffix_char++){
for (byte seq = 0; seq <=8 ; seq++){
slideanim((suffix_char*6)+36,8,seq,old_chars,suffix); // we pass in the old_char array char as the current char and the suffix array as the new char
delay(SLIDE_DELAY);
}
//save the suffic char in the old chars array at array pos 3 and 5.We use these chars next time we change the suffix and feed it to the animation as the current char. The updated char is fed in as the new char.
old_chars = suffix;
}
}//end do date line
*/
//save digita array tol old for comparison next loop
for (byte i = 0; i <= 3; i++) {
digits_old =digits_new;
}
}//secs/oldsecs
}//while loop
fade_down();
}
//called by slide
//this draws the animation of one char sliding on and the other sliding off. There are 8 steps in the animation, we call the function to draw one of the steps from 0-7
//inputs are are char x and y, animation frame sequence (0-7) and the current and new chars being drawn.
void slideanim(byte x, byte y, byte sequence, char current_c, char new_c) {
//To slide one char off and another on we need 9 steps or frames in sequence...
//seq# 0123456 <-rows of the display
// | |||||||
//seq0 0123456START - all rows of the display 0-6 show the current characters rows 0-6
//seq1012345current char moves down one row on the display. We only see it's rows 0-5. There are at display positions 1-6 There is a blank row inserted at the top
//seq2 6 01234current char moves down 2 rows. we now only see rows 0-4 at display rows 2-6 on the display. Row 1 of the display is blank. Row 0 shows row 6 of the new char
//seq3 56 0123
//seq4 456 012half old / half new char
//seq5 3456 01
//seq6 23456 0
//seq7 123456
//seq8 0123456END - all rows show the new char
//from above we can see...
//currentchar runs 0-6 then 0-5 then 0-4 all the way to 0. starting Y position increases by 1 row each time.
//new char runs 6 then 5-6 then 4-6 then 3-6. starting Y position increases by 1 row each time.
//if sequence number is below 7, we need to draw the current char
if (sequence < 7) {
byte dots;
// if (current_c >= 'A' &&|| (current_c >= 'a' && current_c <= 'z') ) {
// current_c &= 0x1F; // A-Z maps to 1-26
// }
if (current_c >= 'A' && current_c <= 'Z' ) {
current_c &= 0x1F; // A-Z maps to 1-26
}
else if (current_c >= 'a' && current_c <= 'z') {
current_c = (current_c - 'a') + 41; // A-Z maps to 41-67
}
else if (current_c >= '0' && current_c <= '9') {
current_c = (current_c - '0') + 31;
}
else if (current_c == ' ') {
current_c = 0; // space
}
else if (current_c == '.') {
current_c = 27; // full stop
}
else if (current_c == '\'') {
current_c = 28; // single quote mark
}
else if (current_c == ':') {
current_c = 29; //colon
}
else if (current_c == '>') {
current_c = 30; // clock_mode selector arrow
}
byte curr_char_row_max = 7 - sequence; //the maximum number of rows to draw is 6 - sequence number
byte start_y = sequence; //y position to start at - is same as sequence number. We inc this each loop
//plot each row up to row maximum (calculated from sequence number)
for (byte curr_char_row = 0; curr_char_row <= curr_char_row_max; curr_char_row++) {
for (byte col = 0; col < 5; col++) {
dots = pgm_read_byte_near(&myfont);
if (dots & (64 >> curr_char_row))
plot(x + col, y + start_y, 1); //plot led on
else
plot(x + col, y + start_y, 0); //else plot led off
}
start_y++;//add one to y so we draw next row one down
}
}
//draw a blank line between the characters if sequence is between 1 and 7. If we don't do this we get the remnants of the current chars last position left on the display
if (sequence >= 1 && sequence <= 8) {
for (byte col = 0; col < 5; col++) {
plot(x + col, y + (sequence - 1), 0); //the y position to draw the line is equivalent to the sequence number - 1
}
}
//if sequence is above 2, we also need to start drawing the new char
if (sequence >= 2) {
//work out char
byte dots;
//if (new_c >= 'A' && new_c <= 'Z' || (new_c >= 'a' && new_c <= 'z') ) {
//new_c &= 0x1F; // A-Z maps to 1-26
//}
if (new_c >= 'A' && new_c <= 'Z' ) {
new_c &= 0x1F; // A-Z maps to 1-26
}
else if (new_c >= 'a' && new_c <= 'z') {
new_c = (new_c - 'a') + 41; // A-Z maps to 41-67
}
else if (new_c >= '0' && new_c <= '9') {
new_c = (new_c - '0') + 31;
}
else if (new_c == ' ') {
new_c = 0; // space
}
else if (new_c == '.') {
new_c = 27; // full stop
}
else if (new_c == '\'') {
new_c = 28; // single quote mark
}
else if (new_c == ':') {
new_c = 29; // clock_mode selector arrow
}
else if (new_c == '>') {
new_c = 30; // clock_mode selector arrow
}
byte newcharrowmin = 6 - (sequence - 2); //minimumm row num to draw for new char - this generates an output of 6 to 0 when fed sequence numbers 2-8. This is the minimum row to draw for the new char
byte start_y = 0; //y position to start at - is same as sequence number. we inc it each row
//plot each row up from row minimum (calculated by sequence number) up to 6
for (byte newcharrow = newcharrowmin; newcharrow <= 6; newcharrow++) {
for (byte col = 0; col < 5; col++) {
dots = pgm_read_byte_near(&myfont);
if (dots & (64 >> newcharrow))
plot(x + col, y + start_y, 1); //plot led on
else
plot(x + col, y + start_y, 0); //else plot led off
}
start_y++;//add one to y so we draw next row one down
}
}
}
//print a clock using words rather than numbers
void word_clock() {
cls();
char numbers = {
"one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten",
"eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"
};
char numberstens = {
"ten", "twenty", "thirty", "forty", "fifty"
};
//potentially 3 lines to display
char str_a;
char str_b;
char str_c;
//byte hours_y, mins_y; //hours and mins and positions for hours and mins lines
byte hours = rtc;
if (hours > 12) {
hours = hours - ampm * 12;
}
if (hours < 1) {
hours = hours + ampm * 12;
}
get_time(); //get the time from the clock chip
byte old_mins = 100; //store mins in old_mins. We compare mins and old mins & when they are different we redraw the display. Set this to 100 initially so display is drawn when mode starts.
byte mins;
//run clock main loop as long as run_mode returns true
while (run_mode()) {
//check for button press
if (buttonA.uniquePress()) {
switch_mode();
return;
}
if (buttonB.uniquePress()) {
display_date();
}
get_time(); //get the time from the clock chip
mins = rtc;//get mins
//if mins is different from old_mins - redraw display
if (mins != old_mins) {
//update old_mins with current mins value
old_mins = mins;
//reset these for comparison next time
mins = rtc;
hours = rtc;
//make hours into 12 hour format
if (hours > 12) {
hours = hours - 12;
}
if (hours == 0) {
hours = 12;
}
//split mins value up into two separate digits
int minsdigit = rtc % 10;
byte minsdigitten = (rtc / 10) % 10;
//if mins <= 10 , then top line has to read "minsdigti past" and bottom line reads hours
if (mins < 10) {
strcpy (str_a, numbers);
strcpy (str_b, "PAST");
strcpy (str_c, numbers);
}
//if mins = 10, cant use minsdigit as above, so soecial case to print 10 past /n hour.
if (mins == 10) {
strcpy (str_a, numbers);
strcpy (str_b, " PAST");
strcpy (str_c, numbers);
}
//if time is not on the hour - i.e. both mins digits are not zero,
//then make first line read "hours" and 2 & 3rd lines read "minstens""mins" e.g. "three /n twenty /n one"
else if (minsdigitten != 0 && minsdigit != 0) {
strcpy (str_a, numbers);
//if mins is in the teens, use teens from the numbers array for the 2nd line, e.g. "fifteen"
//if (mins >= 11 && mins <= 19) {
if (mins <= 19) {
strcpy (str_b, numbers);
}
else {
strcpy (str_b, numberstens);
strcpy (str_c, numbers);
}
}
// if mins digit is zero, don't print it. read read "hours" "minstens" e.g. "three /n twenty"
else if (minsdigitten != 0 && minsdigit == 0) {
strcpy (str_a, numbers);
strcpy (str_b, numberstens);
strcpy (str_c, "");
}
//if both mins are zero, i.e. it is on the hour, the top line reads "hours" and bottom line reads "o'clock"
else if (minsdigitten == 0 && minsdigit == 0) {
strcpy (str_a, numbers);
strcpy (str_b, "O'CLOCK");
strcpy (str_c, "");
}
}//end worknig out time
//run in a loop
//print line a "twelve"
byte len = 0;
while (str_a) {
len++;
}; //get length of message
byte offset_top = (31 - ((len - 1) * 4)) / 2; //
//plot hours line
byte i = 0;
while (str_a) {
puttinychar((i * 4) + offset_top, 1, str_a);
i++;
}
//hold display but check for button presses
int counter = 1000;
while (counter > 0){
//check for button press
if (buttonA.uniquePress()) {
switch_mode();
return;
}
【Arduino 动手做】DIY Arduino全息矩阵时钟
附录【Arduino 动手做】DIY Arduino全息矩阵时钟
项目链接：https://www.hackster.io/mircemk/diy-arduino-holographic-matrix-clock-c35b5e
项目作者：北马其顿 米尔塞姆克（Mirko Pavleski）
项目视频 ：https://www.youtube.com/watch?v=Z04ZxXR_4F8&t=2s
项目代码：https://www.hackster.io/code_files/643589/download
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