How can I control the messages with buttons in dmd
I want control 16 buttons for 16 different messages
the code with bluetooth is:
#include <SPI.h> //SPI.h must be included as DMD is written by SPI (the IDE complains otherwise)
#include <DMD.h>
#include <TimerOne.h>
#include "SystemFont5x7.h"
#include "Arial_black_16.h"
//Fire up the DMD library as dmd
#define DISPLAYS_ACROSS 4
#define DISPLAYS_DOWN 1
DMD dmd(DISPLAYS_ACROSS, DISPLAYS_DOWN);
//number max of characters in your message
#define max_char 100
char message[max_char]; // stores you message
//char mess[max_char];
char r_char; // reads each character
byte index = 0; // defines the position into your array
int i;
char greeting[] = "Bienvenidos";
/*--------------------------------------------------------------------------------------
Interrupt handler for Timer1 (TimerOne) driven DMD refresh scanning, this gets
called at the period set in Timer1.initialize();
--------------------------------------------------------------------------------------*/
void ScanDMD()
{
dmd.scanDisplayBySPI();
}
void setup(void)
{
//initialize TimerOne's interrupt/CPU usage used to scan and refresh the display
Timer1.initialize( 5000 ); //period in microseconds to call ScanDMD. Anything longer than 5000 (5s) and you can see flicker.
Timer1.attachInterrupt( ScanDMD ); //attach the Timer1 interrupt to ScanDMD which goes to dmd.scanDisplayBySPI()
//clear/init the DMD pixels held in RAM
dmd.clearScreen( true ); //true is normal (all pixels off), false is negative (all pixels on)
Serial.begin(9600);
strcpy(message,greeting);
}
void loop(void)
{
//check if serial is avaible an before reading a new message delete's the old message
if(Serial.available())
{
for(i=0; i<99; i++){
message[i] = '\0';
}
//resests the index
index=0;
}
//while is reading the message
while(Serial.available() > 0){
//the message can have up to 100 characters
dmd.clearScreen( true );
if(index < (max_char-1))
{
r_char = Serial.read(); // Reads a character
message[index] = r_char; // Stores the character in message array
index++; // Increment position
// message[index] = '\0'; // Delete the last position
}
}
//prepares the display to print our message
dmd.selectFont(Arial_Black_16);
//displays the message
dmd.drawMarquee(message ,max_char,(32*DISPLAYS_ACROSS)-1 ,0);
long start=millis();
long timer=start;
boolean ret=false;
while(!ret)
{
if ((timer+30) < millis()) {
ret=dmd.stepMarquee(-1,0);
timer=millis();
}
}
}