I created the custom 7 seg display with WS2812B leds where 14 leds make a display 2 leds per each segment. Those displays can be daisychained. To simplyfy the use of such display module I wanted to create the library which gives two methods. To display a given disgit on the specific display in display chain. And also lit a given segment on given display. I created .h and .cpp files. Here they are:
#include "Custom7SegD.h"
// Constructor
Custom7SegD::Custom7SegD(int numDisplays, int ledPin, int brightness)
: numDisplays(numDisplays), numLeds(numDisplays * 14) {
leds = new CRGB[numLeds];
FastLED.addLeds<WS2812B, GRB>(leds, numLeds, ledPin).setCorrection(TypicalLEDStrip);
FastLED.setBrightness(brightness);
}
// Function to display a digit
void Custom7SegD::displayDigit(int displayNum, int digit, CRGB color, int brightness) {
// Calculate the starting LED index for the specified display
int startIdx = (displayNum - 1) * 14;
// Turn off all LEDs first
for (int i = 0; i < 14; i++) {
leds[startIdx + i] = CRGB::Black;
}
// Light up the LEDs for the specified digit
for (int segment = 0; segment < 14; segment++) {
if (digitStates[digit][segment] == 1) {
leds[startIdx + segment] = color;
}
}
FastLED.setBrightness(brightness);
FastLED.show();
}
// Function to light up a specific segment
void Custom7SegD::lightSegment(int displayNum, char segment, CRGB color, int brightness) {
// Define segment to LED mapping
int segmentMapping[7][2] = {
{0, 1}, // Segment A
{2, 3}, // Segment B
{4, 5}, // Segment C
{6, 7}, // Segment D
{8, 9}, // Segment E
{10, 11}, // Segment F
{12, 13} // Segment G
};
// Calculate the starting LED index for the specified display
int startIdx = (displayNum - 1) * 14;
// Light up the LEDs for the specified segment
if (segment >= 'A' && segment <= 'G') {
int segIdx = segment - 'A';
for (int i = segmentMapping[segIdx][0]; i <= segmentMapping[segIdx][1]; i++) {
leds[startIdx + i] = color;
}
FastLED.setBrightness(brightness);
FastLED.show();
}
}
#ifndef CUSTOM7SEGD_H
#define CUSTOM7SEGD_H
#include <FastLED.h>
class Custom7SegD {
public:
// Constructor
Custom7SegD(int numDisplays, int ledPin, int brightness);
// Function to display a digit on a specific display
void displayDigit(int displayNum, int digit, CRGB color, int brightness);
// Function to light a specific segment on a specific display
void lightSegment(int displayNum, char segment, CRGB color, int brightness);
private:
int numDisplays;
int numLeds;
int initialBrightness;
CRGB *leds;
const byte segmentMap[7][2] = {
{3, 4}, // A
{5, 6}, // B
{12, 13}, // C
{0, 1}, // D
{7, 8}, // E
{9, 10}, // F
{2, 11} // G
};
byte digitStates[10][14] = {
{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1}, // 0
{0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1}, // 1
{1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0}, // 2
{1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1}, // 3
{0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1}, // 4
{1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1}, // 5
{1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1}, // 6
{0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1}, // 7
{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, // 8
{1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1} // 9
};
};
#endif
I installed the library in Arduino IDE. But when I try to run this sample program
#include <Custom7SegD.h> // Include your custom library
#define LED_PIN 5 // Pin where the WS2812B LEDs are connected
#define NUM_DISPLAYS 1 // Number of 7-segment displays in the chain
// Create an instance of the Custom7SegD class with 1 display, connected to LED_PIN, and initial brightness of 150
Custom7SegD myDisplay(NUM_DISPLAYS, LED_PIN, 150);
void setup() {
// Nothing needed here since the brightness is set during initialization
}
void loop() {
// Loop to count from 0 to 9
for (int digit = 0; digit <= 9; digit++) {
myDisplay.displayDigit(1, digit, CRGB::Magenta, 150); // Display digit on the first (and only) display with brightness 150
delay(1000); // Wait for 1 second before moving to the next digit
}
}
I am getting this error message
In file included from C:\Users\11\Documents\Arduino\libraries\FastLED-master\src/FastLED.h:58:0,
from C:\Users\11\Documents\Arduino\libraries\Custom7SegD\Custom7SegD.h:4,
from C:\Users\11\Documents\Arduino\libraries\Custom7SegD\Custom7SegD.cpp:1:
C:\Users\11\Documents\Arduino\libraries\FastLED-master\src/fastpin.h: In instantiation of 'class FastPin<66>':
C:\Users\11\Documents\Arduino\libraries\FastLED-master\src/platforms/avr/clockless_trinket.h:107:49: required from 'class ClocklessController<66, 4, 10, 6, (EOrder)10, 0, false, 10>'
C:\Users\11\Documents\Arduino\libraries\FastLED-master\src/chipsets.h:509:7: required from 'class WS2812Controller800Khz<66, (EOrder)10>'
C:\Users\11\Documents\Arduino\libraries\FastLED-master\src/FastLED.h:132:52: required from 'class WS2812B<66, (EOrder)10>'
C:\Users\11\Documents\Arduino\libraries\FastLED-master\src/FastLED.h:359:33: required from 'static CLEDController& CFastLED::addLeds(CRGB*, int, int) [with CHIPSET = WS2812B; unsigned char DATA_PIN = 66]'
C:\Users\11\Documents\Arduino\libraries\Custom7SegD\Custom7SegD.cpp:7:56: required from here
C:\Users\11\Documents\Arduino\libraries\FastLED-master\src/fastpin.h:261:2: error: static assertion failed: Invalid pin specified
static_assert(validpin(), "Invalid pin specified");
^~~~~~~~~~~~~
exit status 1
Error compiling for board Arduino Uno.
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
I am clearly doing something wrong passing the pin to my library which is then in turn passed to fastled library. I have no idea where this pin 66 is coming from.
When I write a sketch using fastled library I am very often passing the pin at initialisation using the variable so it is possible in this case.
Any idea how can I fix it?
