Send TTL signal through serial port in Matlab
matlab, serial-port
Solution
I don't think you can output TTL using the actual serial port, as that is RS-232, not TTL logic levels. If you're using the serial port, you'll need a converter, like this. If you're using an FTDI driver/USB cable, that already outputs TTL logic levels, and the code looks good to me, which means the bug is probably on the device end.
Problem
I am trying to send a TTL signal through a serial port using Matlab. I just need to send 1 value to the device so it should be a really simple procedure. My problem is that I don't know if I am not doing this correctly or if the device is not processing the signal. My code is this: ``` mysignal = serial('com1'); fopen(mysignal); fwrite(mysignal,1); ```