二楼放一些技术资料

最简单的全灯亮，主要用于测试烧写程序，灯是否焊对方向，是否有问题灯，默认caps灯不亮，效果如下

JB_01代码，全灯

#include <SPI.h>
void setup() {
  pinMode (8, OUTPUT);
  pinMode (9, OUTPUT);
  pinMode (10, OUTPUT);
  digitalWrite(8, HIGH);
  SPI.begin();
  digitalWrite(10, LOW);
  SPI.transfer(0xff); 
  SPI.transfer(0x00); 
  SPI.transfer(0x00); 
  digitalWrite(10, HIGH);
  digitalWrite(9, LOW);
  delay(100);
}
void loop() {
  delay(100);  
}

弱光，大概10%的亮度，采用高速硬件PWM所以不闪，关键代码，0x1f代表亮度，0x00-0xff，非线性关系

  analogWrite(9, (byte)(0xff-0x1f));

JB_02代码，弱光

#include <SPI.h>
void setup() {
  pinMode (8, OUTPUT);
  pinMode (9, OUTPUT);
  pinMode (10, OUTPUT);
  digitalWrite(8, HIGH);
  SPI.begin();
  digitalWrite(10, LOW);
  SPI.transfer(0xff); 
  SPI.transfer(0x00); 
  SPI.transfer(0x00); 
  digitalWrite(10, HIGH);
  analogWrite(9, (byte)(0xff-0x1f));
  delay(100);
}
void loop() {
  delay(100);  
}

单点亮第一步，源自141的创意，点亮WASD几个方向键，主要思路反复进行第二行和第三行的扫描

JB_03代码，对于全透键帽太刺眼了，建议参考02调光代码改进

#include <SPI.h>
void setup() {
  pinMode (8, OUTPUT);
  pinMode (9, OUTPUT);
  pinMode (10, OUTPUT);
  digitalWrite(8, HIGH);
  SPI.begin();
  digitalWrite(10, LOW);
  SPI.transfer(0x00); 
  SPI.transfer(0xff); 
  SPI.transfer(0xff); 
  digitalWrite(10, HIGH);
  digitalWrite(9, LOW);
  delay(100);
}
void loop() {
  digitalWrite(10, LOW);
  SPI.transfer(0x02); 
  SPI.transfer(0xff); 
  SPI.transfer(0xff-0x04); 
  digitalWrite(10, HIGH);
  delay(1);  
  digitalWrite(10, LOW);
  SPI.transfer(0x04); 
  SPI.transfer(0xff); 
  SPI.transfer(0xff-0x0E); 
  digitalWrite(10, HIGH);
  delay(1);  
}

老段子，让灯光动起来，简单流水效果，同样支持调光，调速，可自行发挥

JB_04代码，简单流水灯

#include <SPI.h>  
void setup() {  
  pinMode (8, OUTPUT);  
  pinMode (9, OUTPUT);  
  pinMode (10, OUTPUT);  
  digitalWrite(8, HIGH);  
  SPI.begin();  
  digitalWrite(10, LOW);  
  SPI.transfer(0x00);   
  SPI.transfer(0xff);   
  SPI.transfer(0xff);   
  digitalWrite(10, HIGH);  
  digitalWrite(9, LOW);  
  delay(100);  
}  
void loop() {  
  int i;  
  for(i=1;i<256;i*=2)  
  {  
    digitalWrite(10, LOW);  
    SPI.transfer(0xff);   
    SPI.transfer(0xff);   
    SPI.transfer((byte)(0xff-i));   
    digitalWrite(10, HIGH);  
    delay(50);    
  }  
  for(i=1;i<256;i*=2)  
  {  
    digitalWrite(10, LOW);  
    SPI.transfer(0xff);   
    SPI.transfer((byte)(0xff-i));   
    SPI.transfer(0xff);   
    digitalWrite(10, HIGH);  
    delay(50);    
  }  
}