ROM2/main_basic.c

   1 /*
   2  * main_basic.c - a simplified main procedure that relies upon a ersver to do
   3  * anything smart. Just be a dumb interface to a display, keypad, coin mech
   4  * and snacks.
   5  */
   6
   7 #include "display_basic.h"
   8 #include "keypad.h"
   9 #include "chime.h"
  10 #include "server.h"
  11 #include "coinmech.h"
  12 #include "comm.h"
  13 #include "vend.h"
  14
  15 extern inline void enable_rti() {
  16 }
  17
  18 void _start() {
  19         set_bus_expanded();
  20         /* enable RTI */
  21         _io_ports[M6811_TMSK2] = 0x40;
  22         /* powerup ADC, set IRQ' for edge-sensitive operation */
  23         _io_ports[M6811_OPTION] = 0xA0;
  24         /* set the stack pointer */
  25         //asm volatile ("lds %1":: "i"(_stack):"sp");
  26
  27         main();
  28
  29 loop_forever:
  30         goto loop_forever; /* wait for an interrupt to wake us up again */
  31 }
  32
  33 int main() {
  34         u16 last_coin_value = coin_value;
  35
  36         /* init coin mech */
  37         comm_init();
  38         display_init();
  39         while(1) {
  40                 if (rx_queue_state) {
  41                         switch (msg_buf[0]) {
  42                                 case 'V': /* dispense something */
  43                                         break;
  44                                 case 'D': /* write string to display */
  45                                         break;
  46                                 case 'B': /* beep */
  47                                         break;
  48                                 case 'U': /* query current coin balance */
  49                                         break;
  50                                 case 'G': /* give change */
  51                                         break;
  52                                 default:
  53                                 /* shrug */
  54                                         break;
  55                         }
  56                         msg_clr();
  57                 }
  58                 keypad_read();
  59                 if (keypad_pressed()) {
  60                         /* send packet about it */
  61                         /* beep? */
  62                 }
  63
  64                 if (coin_value != last_coin_value) {
  65                         /* send a packet about it */
  66                 }
  67         }
  68 }
  69
  70 void rti() {
  71         chime(); /* turn chime on or off as need be */
  72 }