雖然『小樹林系統』韌體已有新的版本︰

GrovePi/Firmware/Source/v1.2/grove_pi_v1_2_6/grove_pi_v1_2_6.ino

，初步考察

# 主設定
void setup()
{
    // Serial.begin(38400); // start serial for output
    Wire.begin(SLAVE_ADDRESS);
    Wire.onReceive(receiveData);
    Wire.onRequest(sendData);
# 二‧八問題主因，需要 // 
        attachInterrupt(0,readPulseDust,CHANGE);
}

# cmd buffer 仍會越界
void receiveData(int byteCount)
{
    while(Wire.available())
    {
      if(Wire.available()==4)
      {
        flag=0;
        index=0;
               run_once=1;
      }
        cmd[index++] = Wire.read();
    }
}

// callback for sending data
void sendData()
{
  if(cmd[0] == 1)
    Wire.write(val);
  if(cmd[0] == 3 || cmd[0] == 7 || cmd[0] == 56)
    Wire.write(b, 3);
  if(cmd[0] == 8 || cmd[0] == 20)
    Wire.write(b, 4);
  if(cmd[0] == 30)
    Wire.write(b, 9);
  if(cmd[0] == 40)
    Wire.write(dht_b, 9);

  if(cmd[0]==21)
  {
    Wire.write(b,21);
    b[0]=0;
  }
  if(cmd[0]==dust_sensor_read_cmd)
  {
    Wire.write(b,4);
        dust_latest=0;
        cmd[0]=0;
  }
  if(cmd[0]==encoder_read_cmd)
  {
    Wire.write(enc_val,2);
    enc_val[0]=0;
        cmd[0]=0;
  }
  if(cmd[0]==flow_read_cmd)
  {
    Wire.write(flow_val,3);
    flow_val[0]=0;
        cmd[0]=0;
  }
}

 

，看來老問題依舊！！故不急於更新也。

實測驗證結果如下︰

pi@raspberrypi ~ 

 

pi@raspberrypi ~  

 

pi@raspberrypi ~  i2cdetect -y 3
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- 05 -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --                         
pi@raspberrypi ~  python
Python 2.7.9 (default, Mar  8 2015, 00:52:26) 
[GCC 4.9.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import grovepi
>>> addr = 0x05
>>> grovepi.debugEnable()
>>> potentiometer = 0
>>> grovepi.pinMode(potentiometer,"INPUT")
1
>>> grovepi.analogRead(potentiometer)
0
[11, 2, 195, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]
707
>>> ultrasonic_ranger = 2
>>> grovepi.ultrasonicRead(ultrasonic_ranger)
0
[11, 0, 225, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]
225
>>> grovepi.ultrasonicRead(ultrasonic_ranger)
0
[11, 0, 225, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]
225
>>> power=7
>>> grovepi.pinMode(power,"OUTPUT")
1
>>> grovepi.digitalWrite(power,1)
1
>>> grovepi.digitalWrite(power,0)
1
>>> grovepi.bus.write_i2c_block_data(5, 1, [3] + [0, 0, 0])
>>> grovepi.bus.read_i2c_block_data(5, 1)
[11, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]
>>> grovepi.bus.write_i2c_block_data(5, 1, [3] + [0, 0, 0])
>>> grovepi.read_i2c_byte(addr)
0
>>> grovepi.bus.read_i2c_block_data(5, 1)
[11, 2, 195, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]
>>> grovepi.read_i2c_byte(addr)
0
>>> grovepi.read_i2c_block(addr)
[11, 2, 195, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]
>>> grovepi.read_i2c_block(addr)
[11, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]
>>> grovepi.read_i2c_block(addr)
[11, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]
>>> grovepi.read_i2c_block(addr)
[11, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]
>>> grovepi.read_i2c_block(addr)
[11, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]
>>> 

 

pi@raspberrypi ~  cat /dev/ttyUSB0 
CMD = 254, index =  4

CMD = 5, index =  4

CMD = 3, index =  4

DATA = 0, 2, 195

CMD = 3, index =  0

CMD = 7, index =  4

DATA = 0, 0, 225

CMD = 7, index =  0

CMD = 7, index =  4

DATA = 0, 0, 225

CMD = 7, index =  0

CMD = 5, index =  4

CMD = 2, index =  4

CMD = 2, index =  4

CMD = 3, index =  4

CMD = 3, index =  0

CMD = 3, index =  4

DATA = 0, 2, 195

CMD = 3, index =  0

DATA = 0, 2, 195

CMD = 1, index =  1

CMD = 1, index =  2

CMD = 1, index =  3

CMD = 1, index =  4

CMD = 1, index =  0

 

想來樹莓派 3 之硬體 I2C 的『□ ○』一點也沒『改變』的耶？？

 

※ 上天的使者

環山該有美，內湖應慈悲。
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