void setCLK()
{
    //code to set the clock
}

void setConfig()
{
    //code to set the config
}

void setSomethingElse()
{
   //1 line code to write something to a register.
}

void initModule()
{
   setCLK();
   setConfig();
   setSomethingElse();
}

function_used_just_once{
   code blah blah;
}
main{
  codeblah;
  function_used_just_once();
  code blah blah blah;
{

main{
 code blah;
 code blah blah;
 code blah blah blah;
}