Gert Lauritsen

Important changes to forums and questions

All forums and questions are now archived. To start a new conversation or read the latest updates go to forums.mbed.com.

11 years, 11 months ago.

Serial stops working

I have made a small function that takes data from a radio. It works most of the time, but sometime it just stops receiving data.

I have made it so, that it pulls the serial for data. It has a netinterface, so it cant run in interrupt mode.

I can see on a scope tha data is received on the port and I can see that my pull is workning, just that there is no data.

Any ideas?

2 Answers

Wim Huiskamp
11 years, 11 months ago.

Please post the code. The description is not sufficient to analyse what may cause the problem.

Gert Lauritsen
poster
11 years, 11 months ago.

I have postede the code here: http://mbed.org/users/gert_lauritsen/code/telegesis_lib/

I took a quick look at the code and its too complicated to spot the problem in short order. Could you simplify the code to a minimal example that shows the problem or could you indicate under which circumstances (eg received data) the problem occurs. For example adding some trace debug printf.

The issue I did notice was that in several cases you use the '&' (bit and) where you should use the '&&' (logical and). This may lead to unexpected results. Here is one example from your code:

while((b!=CR) & (t.read_ms() < 1000))
posted by Wim Huiskamp 12 Nov 2013