How to test the stability of the communication and to calculate ber using the CVI?

Our Chief Engineer gave me a task yesterday. He asked me to make testing of software and to calculate the error rate binary we would like to know our stability of communication.

However, I never touched this aspect of knowledge. I know a bit about the CVI and I want to write code with CVI bit error rate. So I could test the stability of the communication.

But I don't know how to analyze and judge the receivers codes, whether they are good or bad.

We use the Modbus communication protocol and receive data via a port series, so I want to back up all the data and record the total number of datas, marking as M.

then, save the eligible data and save the number marking as N. Thus, the error rate is binary/m (M - N).

If it's doable? Or you have a good idea. Thank you very much.

unsigned char in_data[100];

inqlen = GetInQLen (comport);
for(i=0;i
Above is my code that receives all the data I want to save the data [] array in_data and save the number.
switch(inqlen)
{
case 19:
{
crc=usMBCRC16(in_data,inqlen );
if((in_data[1] == 0x03)&&(crc==0)&&(in_data[0]==device_addr))
{

}
}

Above is the judgment of condition who receive eligible data which mark as N number.
I know there is a prerequisite that I filter all the bad data. However, I don't know any good idea. I'd appreciate if someone could help me.
Thank you very much.
Best regards.
xiepei

Tags: NI Software

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How to test the stability of the communication and to calculate ber using the CVI?

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