WHy do I get garbage data on serial port?

Rabbit Rabbit Software
1

I have a sensor supplying data on serial port of BL4s220 SBC. The baud rate is 19200 8N1. I have set the port input buffer size as 255. When I start the device I get 5 to 6 frames of good data. After this the garbage data starts coming in. I have not been able to locate source of this problem. Please Help.
Example Data
GOOD DATA
Alt:706 IAS:209 Pitch:0.450000 Alt:706 IAS:210
Pitch:0.444444 Alt:706 IAS:211 Pitch:0.433333 Alt:706 IAS:211
BAD DATA STARTS HERE

Alt:-5004
IAS:127
Pitch: 182.038894

2

How are you receiving and printing the data? Which function do you use to read from the serial port? Are you checking to ensure that you actually received data before printing it? The serBgetc() function returns -1 if there isn’t any data available to read.

Post your code and we can try to help you troubleshoot it.