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 "coinmech.h"
  11 #include "motors.h"
  12 #include "comm.h"
  13 #include "vend.h"
  14
  15 void motor_reply(char* slotptr, u8 code) {
  16         /* returns a message of the form MXYY - X is return code, YY is motor */
  17         wait_for_tx_free();
  18         tx_buffer[0] = 'M';
  19         tx_buffer[1] = code + '0';
  20         tx_buffer[2] = *slotptr;
  21         tx_buffer[3] = *(slotptr+1);
  22         tx_buffer[4] = '\n';
  23         tx_buffer[5] = 0;
  24         send_packet();
  25 }
  26
  27 void dispense_something() {
  28         /* process a message VXX in msg_buf where XX is motor number */
  29         u8 slot;
  30
  31         if ((msg_buf[1] < '0') || (msg_buf[1] > '9') ||
  32                 (msg_buf[2] < '0') || (msg_buf[2] > '9')) {
  33                 msg_buf[1] = msg_buf[2] = '0';
  34                 motor_reply((char*)&msg_buf[1], MOTOR_NOSLOT);
  35                 return;
  36         }
  37
  38         slot = (msg_buf[1] - '0') * 10;
  39         slot += msg_buf[2] - '0';
  40
  41         motor_reply((char*)&msg_buf[1], dispense_motor(slot));
  42 }
  43
  44 void write_to_display() {
  45         /* process a message in the form DXXXXXXXXXXX to send to display */
  46         u8 i;
  47         char buf[10];
  48         for (i = 0; i < 10; i++)
  49                 if (msg_buf[i+1])
  50                         buf[i] = msg_buf[i+1];
  51                 else
  52                         break;
  53
  54         for (; i < 10; i++) /* pad the rest out with spaces */
  55                 buf[i] = ' ';
  56
  57         set_msg(buf);
  58         send_ack();
  59 }
  60
  61 void send_balance() {
  62         wait_for_tx_free();
  63         tx_buffer[0] = 'C';
  64         tx_buffer[1] = have_change?'0':'1';
  65         tx_buffer[2] = (coin_value/10000)%10;
  66         tx_buffer[3] = (coin_value/1000)%10;
  67         tx_buffer[4] = (coin_value/100)%10;
  68         tx_buffer[5] = (coin_value/10)%10;
  69         tx_buffer[6] = coin_value%10;
  70         tx_buffer[7] = '\n';
  71         tx_buffer[8] = 0;
  72         send_packet();
  73 }
  74
  75 void give_change() {
  76         u16 cost;
  77
  78         if ((msg_buf[1] < '0') || (msg_buf[1] > '9') ||
  79                 (msg_buf[2] < '0') || (msg_buf[2] > '9') ||
  80                 (msg_buf[3] < '0') || (msg_buf[3] > '9') ||
  81                 (msg_buf[4] < '0') || (msg_buf[4] > '9') ||
  82                 (msg_buf[5] < '0') || (msg_buf[5] > '9')) {
  83                 send_nack();
  84         }
  85         cost = msg_buf[1] - '0';
  86         cost *= 10; cost = msg_buf[2] - '0';
  87         cost *= 10; cost = msg_buf[3] - '0';
  88         cost *= 10; cost = msg_buf[4] - '0';
  89         cost *= 10; cost = msg_buf[5] - '0';
  90
  91         coin_cost(cost);
  92         send_ack();
  93 }
  94
  95 void send_keypress(u8 key) {
  96         /* send a packet of the form KX with X being the key, or R for reset */
  97         wait_for_tx_free();
  98         tx_buffer[0] = 'K';
  99         if (key == KEY_RESET)
 100                 tx_buffer[1] = 'R';
 101         else
 102                 tx_buffer[1] = (key%10)+'0';
 103         tx_buffer[2] = '\n';
 104         tx_buffer[3] = 0;
 105         send_packet();
 106 }
 107
 108 void send_door_msg(bool open) {
 109         wait_for_tx_free();
 110         tx_buffer[0] = 'D';
 111         tx_buffer[1] = open?'1':'0';
 112         tx_buffer[2] = '\n';
 113         tx_buffer[3] = 0;
 114         send_packet();
 115 }
 116
 117 void do_chime() {
 118         chime_start();
 119         send_ack();
 120 }
 121
 122 void ping_pong() {
 123         /* make sure it's really a ping */
 124         if (msg_buf[1] != 'I' ||
 125                 msg_buf[2] != 'N' ||
 126                 msg_buf[3] != 'G') {
 127                 send_nack();
 128                 return;
 129         }
 130         /* respond with ack & pong */
 131         wait_for_tx_free();
 132         tx_buffer[0] = 'P';
 133         tx_buffer[1] = 'O';
 134         tx_buffer[2] = 'N';
 135         tx_buffer[3] = 'G';
 136         tx_buffer[4] = '\n';
 137         tx_buffer[5] = 0;
 138         send_packet();
 139 }
 140
 141 u16 last_coin_value;
 142 bool last_door_open;
 143 char display_buf[11];
 144 u8 cur_motor[2];
 145
 146 int main() {
 147         u8 i;
 148         for (i = 0; i < 11; i++)
 149                 display_buf[i] = ' ';
 150         display_buf[10] = '\0';
 151
 152         changer_output = 0x7f;
 153         _io_ports[M6811_PORTA] = 0xc0; /* display on. talking to serial port */
 154         _io_ports[M6811_DDRA] = 0xfc;
 155         _io_ports[M6811_DDRD] = 0x3e;
 156         _io_ports[M6811_SPCR] = 0x12;
 157         set_misc_output(0x00);
 158
 159         display_init();
 160         set_msg(" HELLO    ");
 161
 162         unlock(); /* enable interrupts */
 163
 164         comm_init();
 165         coinmech_init();
 166         keypad_init();
 167
 168         delay(500);
 169
 170         set_msg("  CRUEL   ");
 171
 172         last_coin_value = 0;
 173         last_door_open = 0;
 174
 175         dispense_motor(22);
 176         delay(1000);
 177
 178         set_msg("   WORLD  ");
 179         delay(1000);
 180
 181         chime_start();
 182
 183         cur_motor[0] = 0;
 184         while(1) {
 185                 if (cur_motor[0] == 0xff) { /* signal to say redraw screen */
 186                         set_msg("*5N4X0RZ* ");
 187                         cur_motor[0] = 0;
 188                 }
 189
 190                 if (door_open() != last_door_open) {
 191                         last_door_open = door_open();
 192                         send_door_msg(last_door_open);
 193                         if (last_door_open) {
 194                                 chime_start();
 195                                 set_msg("DOOR OPEND");
 196                         } else {
 197                                 chime_start();
 198                                 set_msg("DOOR CLOSE");
 199                         }
 200                 }
 201
 202                 if (rx_queue_state) {
 203                         switch (msg_buf[0]) {
 204                                 case 'V':
 205                                         dispense_something();
 206                                         break;
 207                                 case 'D':
 208                                         write_to_display();
 209                                         break;
 210                                 case 'B':
 211                                         do_chime();
 212                                         break;
 213                                 case 'U':
 214                                         send_balance();
 215                                         break;
 216                                 case 'G':
 217                                         give_change();
 218                                         break;
 219                                 case 'P':
 220                                         ping_pong();
 221                                         break;
 222                                 default:
 223                                 /* shrug */
 224                                         send_nack();
 225                                         break;
 226                         }
 227                         msg_clr();
 228                 }
 229
 230                 keypad_read();
 231                 if (keypad_pressed()) {
 232                         if (last_key == KEY_RESET) {
 233                                 cur_motor[0] = 0xff;
 234                         } else {
 235                                 if (cur_motor[0]) {
 236                                         cur_motor[1] = last_key%10;
 237                                         display_buf[1] = cur_motor[0]+'0';
 238                                         set_msg(display_buf);
 239                                         dispense_motor(cur_motor[0]*10 + cur_motor[1]);
 240                                         set_msg("   DONE   ");
 241                                         display_buf[0] = ' ';
 242                                         display_buf[1] = ' ';
 243                                         cur_motor[0] = 0xff;
 244                                         delay(1000);
 245                                 } else {
 246                                         cur_motor[0] = last_key%10;
 247                                         display_buf[0] = cur_motor[0]+'0';
 248                                         set_msg(display_buf);
 249                                 }
 250                         }
 251                         send_keypress(last_key);
 252                 }
 253
 254                 if (coin_value != last_coin_value) {
 255                         send_balance();
 256                         last_coin_value = coin_value;
 257                 }
 258         }
 259 }
 260