This is a simple exercise designed to get you started on L4. It contains very detailed instructions, together with the existing source code and the L4 manual you should have no problem doing it.
tar zxvf sos.tar.gz
tty_testwhich starts up, prints out its thread id, and then goes into a loop.
printfimplementation that outputs data to L4's debug console. In fact it uses the provided l4e_print_string function. This function should only be used for internal SOS debugging, not as a console for applications, so, your task is to modify the
printffunction to send data to the other serial port.
The second part of milestone zero is to find a partner for the rest of the project. The project is to be completed unless prior permission has been obtained from the LiC.
sos/main.cand the code in the
tty_send_string(or similar) in
main.cto handle recognise your new protocol, and print out a debug message when you receive one of these messages.
tty_test.cso that it tests your
printfto use your new
tty_test's output now goes to the second serial line, not the console debugger.
You will need to demonstrate your solution, running on the U4600 hardware to the tutor during the demonstration period. You should be prepared to show your tutor which files you modified in your solution, and explain any design decisions you made.
You will let the tutor know who your partner is so that group accounts can be created for you.