Peter Bindels <dascandy <at> gmail.com> writes:
> int main() {
>     EventHdl handler;
>     Channel serial_out(handler, uart_info);
>     Button left(handler, serial_out, ...), right(handler, serial_out,
> ...), confirm(handler, serial_out, ...);
> 
>     handler.process();
> }

#include <CRIT.h>
#include <kbd.h.>
#include <rs232.h>
#include <timer.h>

volatile int errors = 0;
volatile int keycode = 0;

void Rs232txd {
  CRITA
  if((rs232->status & RS232_TXEMPTY) && keycode) {
    rs232->txd = keycode;
    keycode = 0;
  }
  CRITZ
}

void ButtonsToSerial(void) {
    CRITA
    if(keycode) { // overrun
      errors |= TXD_OVERRUN; // NOT throw(), oops
      CRITZ // !!!
      return;
    }
    keycode = kbd->keycode;
    kbd->status & ~KEY_DOWN;
    CRITZ
    Rs232txd;
}

int main() {
  timer_init();
  rs232_init();
  kbd_init();

  timer_setup(0, TICKS);  // needed by kbd for debouncing

  rs232->speed = RS232_SPEED;
  rs232->txcallback = Rs232txd;
  rs232_poll();

  kbd->debounce = DEBOUNCE_CONSTANT;
  kbd->callback = ButtonsToSerial;
  kbd_poll();

idle:
  goto idle;
}

Yes, I know that you described an event driven model and I a timer driven aided
one, but this illustrates just a little bit of what you need to implement to
make your 'beautiful' main() work (20-50 more lines of code missing, to do the
timer interrupts, the keyboard, and the serial and baud generator init). You or
someone who implements it (the libraries) for you. And isn't it dercandy ?
Anyway the main() is about as terse as yours.

Peter P.


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