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MessageBoard.ino
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MessageBoard.ino
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#define FONT_5x8_FIXED_MEDIUM
#include <StripDisplay.h>
XBMFont * fontP = &fixedMedium_5x8;
#define STRIPLED_GPIO 5
#define STRIPLED_W 32
#define STRIPLED_H 8
CRGB leds[STRIPLED_W*STRIPLED_H];
StripDisplay strip(STRIPLED_GPIO, STRIPLED_W, STRIPLED_H, WRAP_COLUMNS, ORIGIN_TOP_LEFT, leds);
// message board globals
String message = "";
CRGB fg(4,2,1);
CRGB bg(0,0,1);
#define START_OFFSET -10
int offset = START_OFFSET;
// time managemet globals
#define SCROLL_MS 50;
int update_ms = 0;
// initial FastLED and StripDisplay setup
void setup() {
FastLED.addLeds<NEOPIXEL,STRIPLED_GPIO>(leds, STRIPLED_W*STRIPLED_H);
strip.setup(fontP);
Serial.begin(9600);
Serial.println(String(STRIPLED_W*STRIPLED_H) + String(" leds on gpio ") + String(strip.getGpio()));
// initial message setup
strip.setFgColor(fg);
strip.setBgColor(bg);
updateMessageText("Hello");
}
// setup new message text
void updateMessageText(String text) {
message = text;
offset = START_OFFSET;
strip.setText(text);
}
// display and scroll message
void displayMessageText() {
if (offset > strip.getTextWidth())
offset = START_OFFSET;
strip.displayText(offset);
offset++;
}
// get message from serial if any
void getMessageSerial() {
if (Serial.available())
updateMessageText(Serial.readString());
}
void loop() {
// mesure current time
int current_ms = millis();
// poll for message on serial port
getMessageSerial();
// scroll and display message at a fixed time rate
if (update_ms <= current_ms) {
displayMessageText();
update_ms = current_ms + SCROLL_MS;
}
else {
FastLED.delay(update_ms - current_ms);
}
}