Serial port receiving ideas-EEWORLD

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I saw the method of serial port receiving on the avr forum. It was helpful for the project, so I recorded it.

Thanks to AVRBBS for providing the method

static unsigned char i; //Define a static variable to record which byte is received.
switch (i) {
  case:0
    if (udr == 0xAA) //Receive the first data and determine whether it is the 0XAA start byte.
       i = i + 1; //Synchronization successful, increase variable i and proceed to the next step.
    break;
  case:1
     In this step, get the length of the first symbol and save it in the receiving array you defined. It will be used when receiving data later.
  case:2
     Receive command bytes and store them into the array.
  The above is a general process for your reference and study. The specific procedures below need to be completed by yourself.
  case:7
      Determine the frame stop bit (0x55) and whether the previous bit check is correct. If both are successful, do the following two things:
      1. Take certain actions according to your situation, or put a certain mark to indicate that you have received it.
      2. Remember to reset the variable i = 0.

Keywords：avr Reference address：Serial port receiving ideas

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