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
7 #include "display_basic.h"
15 void motor_reply(char* slotptr, u8 code) {
16 /* returns a message of the form MXYY - X is return code, YY is motor */
19 tx_buffer[1] = code + '0';
20 tx_buffer[2] = *slotptr;
21 tx_buffer[3] = *(slotptr+1);
27 void dispense_something() {
28 /* process a message VXX in msg_buf where XX is motor number */
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);
38 slot = (msg_buf[1] - '0') * 10;
39 slot += msg_buf[2] - '0';
41 motor_reply((char*)&msg_buf[1], dispense_motor(slot));
44 void write_to_display() {
45 /* process a message in the form DXXXXXXXXXXX to send to display */
48 for (i = 0; i < 10; i++)
50 buf[i] = msg_buf[i+1];
54 for (; i < 10; i++) /* pad the rest out with spaces */
64 tx_buffer[1] = (coin_value/10000)%10;
65 tx_buffer[2] = (coin_value/1000)%10;
66 tx_buffer[3] = (coin_value/100)%10;
67 tx_buffer[4] = (coin_value/10)%10;
68 tx_buffer[5] = coin_value%10;
77 if ((msg_buf[1] < '0') || (msg_buf[1] > '9') ||
78 (msg_buf[2] < '0') || (msg_buf[2] > '9') ||
79 (msg_buf[3] < '0') || (msg_buf[3] > '9') ||
80 (msg_buf[4] < '0') || (msg_buf[4] > '9') ||
81 (msg_buf[5] < '0') || (msg_buf[5] > '9')) {
84 cost = msg_buf[1] - '0';
85 cost *= 10; cost = msg_buf[2] - '0';
86 cost *= 10; cost = msg_buf[3] - '0';
87 cost *= 10; cost = msg_buf[4] - '0';
88 cost *= 10; cost = msg_buf[5] - '0';
94 void send_keypress(u8 key) {
95 /* send a packet of the form KX with X being the key, or R for reset */
101 tx_buffer[1] = (key%10)+'0';
107 void send_door_msg(bool open) {
110 tx_buffer[1] = open?'1':'0';
128 changer_output = 0x7f;
129 _io_ports[M6811_PORTA] = 0xc8;
130 _io_ports[M6811_DDRD] = 0x3e;
131 _io_ports[M6811_SPCR] = 0x12;
133 unlock(); /* enable interrupts */
143 if (door_open() != last_door_open) {
144 last_door_open = door_open();
145 send_door_msg(last_door_open);
148 if (rx_queue_state) {
149 switch (msg_buf[0]) {
151 dispense_something();
174 if (keypad_pressed()) {
175 send_keypress(last_key);
178 if (coin_value != last_coin_value) {
180 last_coin_value = coin_value;