Odd counter problem..

i have 5 leds in circle, when count through them 1 @ time counter clockwise you'd imagine when try & go clockwise nothing happens?

here snippet of code amended arduino-shift register example...

quote

dataarray[0] = 0x10;
  dataarray[1] = 0x08;
  dataarray[2] = 0x04;
  dataarray[3] = 0x02;
  dataarray[4] = 0x01;

quote

// counter clockwise
  (int j = 0; j < 5; j++) {
    //load light sequence want array
    data = dataarray[j];
    //ground latchpin , hold low long transmitting
    digitalwrite(latchpin, 0);
    //move 'em out
    shiftout(datapin, clockpin, data);
    //return latch pin high signal chip it
    //no longer needs listen information
    digitalwrite(latchpin, 1);
    delay(300);
  }
 
  // clockwise
  (int k = 4; k < 0; k--) {
    //load light sequence want array
    data = dataarray[k];
    //ground latchpin , hold low long transmitting
    digitalwrite(latchpin, 0);
    //move 'em out
    shiftout(datapin, clockpin, data);
    //return latch pin high signal chip it
    //no longer needs listen information
    digitalwrite(latchpin, 1);
    delay(300);
  }

so missing here?

i thought read out dataarray backwards?!?!

thanks

nic

the "k < 0" means run for-loop while k less zero. in other words, loop not executed.

code: [select]


// (int k = 4; k < 0; k--) // bad
for (int k = 4; k>=0; k--)  // good


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