Arduino三片74HC595控制双色8x8LED点阵程序

三片 595 联级控制双色点阵(共阴)显示




问题:绿色总是少显示一列.  有高手看看代码指出问题.   (有谁做过 三片595 控制双色点阵,欢迎交流)

代码:
#include <TimerOne.h>
int latchpin = 8;
int clockpin = 12;
int datapin = 11;
int i;
int j;
int k;
void setup()
{
  pinMode (latchpin,OUTPUT);
  pinMode (clockpin,OUTPUT);
  pinMode (datapin,OUTPUT);
}
void loop(){
//绿色全亮
  digitalWrite(latchpin,LOW);
  shiftit1(B00000000);
  shiftit0(B11111111);
  digitalWrite(latchpin,HIGH);
  delay(1000);
//红色全亮
digitalWrite(latchpin,LOW);
shiftit2(B00000000);
shiftit0(B11111111);
digitalWrite(latchpin,HIGH);
delay(1000);
}
//阴极 595
void shiftit0(byte dataout){
  int i=0;
  boolean pinstate;
  digitalWrite (datapin,LOW);
  digitalWrite(clockpin,LOW);
  for (i = 0;i < 8;i ++){
    digitalWrite(clockpin,LOW);
    if(dataout &(1 << i)){pinstate = HIGH;}else{pinstate = LOW;}
    digitalWrite(datapin,pinstate);
    digitalWrite(clockpin,HIGH);
    digitalWrite(datapin,LOW);
  }
  digitalWrite(clockpin,LOW);

}
//绿色 595
void shiftit1(byte dataout){
  int j=0;
  boolean pinstate;
  digitalWrite (datapin,LOW);
  digitalWrite(clockpin,LOW);
  for (j = 8;j < 16;j ++){
    digitalWrite(clockpin,LOW);
    if(dataout &(1 << j)){pinstate = HIGH;}else{pinstate = LOW;}
    digitalWrite(datapin,pinstate);
    digitalWrite(clockpin,HIGH);
    digitalWrite(datapin,LOW);   
  }  
  digitalWrite(clockpin,LOW);
}
//红色 595
void shiftit2(byte dataout){
  k=0;
  boolean pinstate;
  digitalWrite (datapin,LOW);
  digitalWrite(clockpin,LOW);
  for (k = 16;k < 32;k ++){
    digitalWrite(clockpin,LOW);
    if(dataout &(1 << k)){pinstate = HIGH;}else{pinstate = LOW;}
    digitalWrite(datapin,pinstate);
    digitalWrite(clockpin,HIGH);
    digitalWrite(datapin,LOW);
    }
  digitalWrite(clockpin,LOW);
}

电路原理图如下：

参考的电路图