This page explains the compilation, elaboration and run the UART project.

1. The first part of the bash script is the option clear. If entered, it must be the first parameter, as opposed to the other ones. If the switch is given, the GHDL compilation directory is removed.
   Note: the shift command must follow, in case more switches are given by the user.

if [ "$1" = "clear" ] ; then
  #clear any former compilation results
  rm -fr work
  shift
fi


2. Next the presence of the work directory is checked.

if [ -d "work" ] ; then
  echo "work directory exists"
else
  mkdir work
fi


3. Last before running GHDL commands, comes the input switches handling: compilation skip, generate waves in VCD format and simulation run time.
   Note: the usage of grep command to make sure a valid number was given. The output is piped to /dev/null and the status code, returned by grep, is checked.



comp_skip="no"
ghdl_vcd="no"
ghdl_time="100"
#build the simulation command
while (( "$#" )); do
  if [ "$1" = vcd ] ; then
    ghdl_vcd="yes"
  else
    if [ "$1" = "no_comp" ] ; then
      comp_skip="yes"
    else
      #checks for time validity - has to be a number
      echo $1 | grep "^[0-9]*$" >> /dev/null
      if [ $? -eq 0 ] ; then
        ghdl_time=$1
      fi
    fi
  fi
  shift
done
ghdl_run="./rx_tb --stop-time="${ghdl_time}"us --assert-level=error"
if [ "$ghdl_vcd" = "yes" ] ; then
  ghdl_run=${ghdl_run}" --vcdgz=ghdl.vcd.gz"
fi
ghdl_run=${ghdl_run}" >& ghdl.log"
...


To return to the main project type: Main .

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