getting individual bits out of a variable

Frozen01 · Joined: 23 Apr 2009 Posts: 32

Here is what I need to do....

I read the serial stream (UART1)... I then want to pass to a function that I "bitbang" out to an oddball serial like device that does not fit the standard RS232 format.

Reading the port is not a problem, but I can't place my finger on how to extract out the bit pattern that I need to send. Input data is standard RS232 framed data.

temtronic · Posted: Wed May 27, 2020 10:28 am

Quick comment..
CCS has a 'bit test' function you can use ! Check the manual for the correct syntax, but a simple 'loop' from 0 to 7, or 7 to 0, will 'extract' the bit from the byte, then you can do 'whatever' to send to the other device.
0 to 7 will get lsb to msb, 7 to 0 gets high bit first...

There may be an example in the code library, it's been used to send '1' or '0' to an LCD to 'show' the binary equal to a byte.

jay

Frozen01 · Joined: 23 Apr 2009 Posts: 32

I got something working, ended up just using a for loop...

bkamen · Posted: Sun May 31, 2020 10:37 am

Right...

With a loop, you can either use the bit_tes() function and/or roll the bits using >> or << operators.
_________________
Dazed and confused? I don't think so. Just "plain lost" will do. :D