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我的案例陈述有问题。python脚本serial.writes一个“s”用于传感器信息或“r”用于继电器信息。传感器信息部分完美运行。我无法正确获取继电器信息。python 脚本发出一个“r”，后跟中继信息，该信息应存储在数组 [x] 中。arduino 确认 case 语句中的“r”，但不处理随后的处理数据包。我得到的只是空数组。我在这里查看了尼克·加蒙斯系列页面，但无法弄清楚如何让它在我的情况下工作，我只是没有经验。

任何帮助深表感谢。

阿杜诺代码

void SerialCommunication()
{ 
  if (Serial.available()>0)
  {
    char inChar = Serial.read(); 
    switch (inChar) 
    {
      case 'r':
        Sensors();
        break;
      case 'w':
        Relays();
        ProcessRelays();
        break;
      default:
        break;
    }
  } 
}

void Relays()
{
  while (Serial.available() ==0);
  // Read all serial data available, as fast as possible
  while(Serial.available() > 0)
  {
    char inChar = Serial.read();
    if(inChar == SOP)
    {
       index = 0;
       inData[index] = '\0';
       started = true;
       ended = false;
    }
    else if(inChar == EOP)
    {
       ended = true;
       break;
    }
    else
    {
      if(index < 79)
      {
        inData[index] = inChar;
        index++;
        inData[index] = '\0';
      }
    }
  }

  // We are here either because all pending serial
  // data has been read OR because an end of
  // packet marker arrived. Which is it?

  if(started && ended)
  {
    // The end of packet marker arrived. Process the packet

    if (strlen(inData) > 0)
   {

      char *token = strtok(inData, ",");
      if(token)
      {
         index = 0;

         array[index] = atoi(token);

         while (token = strtok(NULL, ","))
         {
            array[index++] = atoi(token);
         }
      }
    }

    // Reset for the next packet
    started = false;
    ended = false;
    index = 0;
    inData[index] = '\0';
  }
}
void ProcessRelays()
{
  Serial.println(array[0]);
  Serial.println(array[1]);
  Serial.println(array[2]);
}

蟒蛇代码

#Import libraries
import serial
import string
import MySQLdb
import pprint
from time import strftime

#Connect to arduino
ser = serial.Serial('/dev/ttyACM0', baudrate=9600, timeout = 2)
ser.open()
#Connects to database
db = MySQLdb.connect(host="localhost", # your host, usually localhost
                     user="zzz", # your username
                     passwd="zzz", # your password
                     db="zzz") # name of the data base


cur = db.cursor()
with db:
        cur = db.cursor()
        cur.execute("SELECT * FROM relayschedule WHERE id=1")
        rows = cur.fetchall()

    for row in rows:
        s = str(row)
        ser.write("w" + s)
ser.close()
db.close()
4

1 回答 1

0

是的，我认为您的中继功能可能存在问题。此外，您在 inData 数组中插入了太多的 '\0'，这将导致 strtok 失败，因为 '\0' 用于终止 c 中的字符串。因此，如果 strtok 在输入字符串 (inData) 的中间看到 '\0' ，它将终止处理。我想你可以试试这个方法。这与您对与 inData 相关的一些更改所做的操作完全相同。

void Relays()
{
  while (Serial.available() ==0);
  // Read all serial data available, as fast as possible
  while(Serial.available() > 0)
  {
    char inChar = Serial.read();
    if(inChar == SOP)
    {
       index = 0;
       started = true;
       ended = false;
    }
    else if(inChar == EOP)
    {
       ended = true;
       inData[index] = '\0';
       break;
    }
    else
    {
      if(index < 79)
      {
        inData[index] = inChar;
        index++;
      }
    }
  }

  // We are here either because all pending serial
  // data has been read OR because an end of
  // packet marker arrived. Which is it?

  if(started && ended)
  {
    // The end of packet marker arrived. Process the packet

    if (strlen(inData) > 0)
   {

      char *token = strtok(inData, ",");
      if(token)
      {
         index = 0;

         array[index] = atoi(token);

         while (token = strtok(NULL, ","))
         {
            array[index++] = atoi(token);
         }
      }
    }

    // Reset for the next packet
    started = false;
    ended = false;
    index = 0;
  }
}
于 2013-09-13T08:25:33.620 回答