Thanksgiving LED

MyRobot.cpp

#include <cstring>
#include <vector>

#include <frc/AddressableLED.h>
#include <frc/TimedRobot.h>

static const char* msg[8] = {
  "*   *  *****  *****  *****  *   *     *****  *   *  *****  *   *  *   *  *****  *****  *****  *   *  *****  *   *  *****  *  2  3                          ",
  "*   *  *   *  *   *  *   *  *   *       *    *   *  *   *  *   *  *  *   *      *        *    *   *    *    *   *  *      *  2  3                          ",
  "*   *  *   *  *   *  *   *  *   *       *    *   *  *   *  **  *  * *    *      *        *    *   *    *    **  *  *      *  2  3                          ",
  "*****  *****  *****  *****  *****       *    *****  *****  * * *  **     *****  *  **    *    *   *    *    * * *  *  **  *  2  3                          ",
  "*   *  *   *  *      *        *         *    *   *  *   *  *  **  * *        *  *   *    *     * *     *    *  **  *   *  *  2  3                          ",
  "*   *  *   *  *      *        *         *    *   *  *   *  *   *  *  *       *  *   *    *     * *     *    *   *  *   *                                   ",
  "*   *  *   *  *      *        *         *    *   *  *   *  *   *  *   *  *****  *****  *****    *    *****  *   *  *****  *  2  3                          ",
  "                                                                                                                                                           "
};

class MyRobot : public frc::TimedRobot {
  frc::AddressableLED led{0};
  std::vector<frc::AddressableLED::LEDData> ledData =
      std::vector<frc::AddressableLED::LEDData>(8*32);
  int count = 0;
  int colstart = 0;
  int msglen = strlen(msg[0]);

  /**
   * This function is run when the robot is first started up and should be
   * used for any initialization code.
   */
  void RobotInit() override {
    led.SetLength(8*32);
    led.Start();
  }

  /**
   * This function is called periodically during all modes
   */
  void RobotPeriodic() override {
    ++count;
    if (count > 3) {
      count = 0;
      for (int row=0; row<32; ++row) {
        for (int col=0; col<8; ++col) {
          frc::AddressableLED::LEDData color(0, 0, 0);
          //ledData[row*32 + col] = color;
          if (msg[col][(colstart + row) % msglen] == '*')
            color = frc::AddressableLED::LEDData(255, 0, 0);
          else if (msg[col][(colstart + row) % msglen] == '2')
            color = frc::AddressableLED::LEDData(0, 255, 0);
          else if (msg[col][(colstart + row) % msglen] == '3')
            color = frc::AddressableLED::LEDData(0, 0, 255);
          ledData[row*8 + (((row & 1) == 1) ? (7-col) : col)] = color;
        }
      }
      //ledData[colstart] = frc::AddressableLED::LEDData(255, 0, 0);
      led.SetData(ledData);
      ++colstart;
      //if (colstart >= 8*32) colstart = 0;
      if (colstart >= msglen) colstart = 0;
    }
  }
};

int main() { return frc::StartRobot<MyRobot>(); }