BasicMicro - Forums

Hi,

I have a weird problem. I can use the serin command to read in a number like "123" or "435." But if I do a number with a zero in it like "012" or "102" it doesn't show up right (instead it shows up something like 122). However, if the zero is the last digit, it works :( I am using the Basic Atom 28 with the lynxmotion miniAtom bot board. Here is the serin comman I am using:

serin [dec1 code1, dec1 code2, dec1 code3]

I then send out the variables to some seven segment displays. Any ideas?? Thanks!

Josh

Well, your SERIN command is missing the pin and the baud-mode identifier.

I'm guessing the 'zero' character is causing you to lose 'sync' in your RS-232 data stream. And that could happen if either your baud mode number was wrong, or if your clock frequency was off.

Josh didn't include the whole serin command we're using for brevity, I guess. This is what we're actually using:

serin 3, N2400, [dec1 code1, dec1 code2, dec1 code3]

The transmitter is set to 2400 8N1 transmission (8 data bits, no parity, 1 stop bit). Flow control is turned off.

One other thing I should mention is that we're using a USB-to-serial cable to send the transmission, and we're connecting the transmitter hardware directly to pins 5 (ground) and 3 (transmit) on the DB-9 connector. Transmission is via IR light pulses. We're basically sending out a string of ASCII letters and numbers, and we want to discard non-numeric bytes. The dec1 modifier accomplished this for 80% of the possible 3-digit numbers, but fails for the other 20% (which have a zero in the first or middle position). I'd probably not be as confused if it failed for a zero in the third position, but it gets that case without any problem.

Issue solved.

Neat. What was the problem?