+#include "xmodem.h"
+//#include "sha1.h"
+
+u8 last_standalone;
+u8 last_switch_input;
+u8 last_misc_input;
+u16 last_coin_value;
+bool last_door_open;
+char display_buf[11];
+/* cur_motor[0] is 0 for nothing, or 1..10, or 0xff to say redraw.
+ * cur_motor[1] is 0..9 and only meaningful is cur_motor[0] != 0. */
+u8 cur_motor[2];
+
+bool check_standalone() {
+ if (is_standalone()) {
+ send_string("011 In standalone mode. Function disabled." CRLF);
+ return 1;
+ }
+ return 0;
+}
+
+void unknown_command() {
+ send_string("012 Unknown command. Type HELP for help." CRLF);
+}
+
+void motor_reply(u8 code) {
+ /* returns a message of the form MXYY - X is return code, YY is motor */
+ switch (code) {
+ case MOTOR_SUCCESS:
+ send_string("100 Vend successful." CRLF);
+ break;
+ case MOTOR_NOSLOT:
+ send_string("151 No motor there." CRLF);
+ break;
+ case MOTOR_CURRENT_FAIL:
+ send_string("152 Over current." CRLF);
+ break;
+ case MOTOR_HOME_FAIL:
+ send_string("153 Home sensors failing." CRLF);
+ break;
+ default:
+ send_string("159 Unknown motor error." CRLF);
+ }
+}
+
+void dispense_something() {
+ /* process a message VXX in sci_rx_buf where XX is motor number */
+ u8 slot;
+
+ if (check_standalone()) return;
+
+ if (my_strncmp("ALL", (char*)sci_rx_buf+1, 3)) {
+ char motor[3];
+ motor[2] = '\0';
+ send_string("102 Vend all motors starting." CRLF);
+ for (motor[0] = '0'; motor[0] <= '9'; motor[0]++) {
+ for (motor[1] = '0'; motor[1] <= '9'; motor[1]++) {
+ send_string("101 Vending ");
+ send_string(motor);
+ send_string(CRLF);
+ motor_reply(dispense_motor(motor[0]*10+motor[1]));
+ }
+ }
+ send_string("102 Vend all motors complete." CRLF);
+ return;
+ }
+
+ if ((sci_rx_buf[1] < '0') || (sci_rx_buf[1] > '9') ||
+ (sci_rx_buf[2] < '0') || (sci_rx_buf[2] > '9')) {
+ sci_rx_buf[1] = sci_rx_buf[2] = '0';
+ motor_reply(MOTOR_NOSLOT);
+ return;
+ }
+
+ slot = (sci_rx_buf[1] - '0') * 10;
+ slot += sci_rx_buf[2] - '0';
+
+ motor_reply(dispense_motor(slot));
+}
+
+void write_to_display() {
+ /* process a message in the form DXXXXXXXXXX to send to display */
+ u8 i;
+ char buf[11];
+
+ if (check_standalone()) return;
+
+ for (i = 0; i < 10; i++)
+ if (sci_rx_buf[i+1])
+ buf[i] = sci_rx_buf[i+1];
+ else
+ break;
+
+ for (; i < 10; i++) /* pad the rest out with spaces */
+ buf[i] = ' ';
+ buf[i] = '\0';
+
+ set_msg(buf);
+ send_string("300 Written." CRLF);
+}
+
+void send_balance() {
+ sci_tx_buf[0] = 'C';
+ sci_tx_buf[1] = have_change?'0':'1';
+ sci_tx_buf[2] = (coin_value/10000)%10;
+ sci_tx_buf[3] = (coin_value/1000)%10;
+ sci_tx_buf[4] = (coin_value/100)%10;
+ sci_tx_buf[5] = (coin_value/10)%10;
+ sci_tx_buf[6] = coin_value%10;
+ sci_tx_buf[8] = 0;
+ send_buffer(1);
+}
+
+void give_change() {
+ u16 cost;
+
+ if ((sci_rx_buf[1] < '0') || (sci_rx_buf[1] > '9') ||
+ (sci_rx_buf[2] < '0') || (sci_rx_buf[2] > '9') ||
+ (sci_rx_buf[3] < '0') || (sci_rx_buf[3] > '9') ||
+ (sci_rx_buf[4] < '0') || (sci_rx_buf[4] > '9') ||
+ (sci_rx_buf[5] < '0') || (sci_rx_buf[5] > '9')) {
+ send_nack();
+ }
+ cost = sci_rx_buf[1] - '0';
+ cost *= 10; cost = sci_rx_buf[2] - '0';
+ cost *= 10; cost = sci_rx_buf[3] - '0';
+ cost *= 10; cost = sci_rx_buf[4] - '0';
+ cost *= 10; cost = sci_rx_buf[5] - '0';
+
+ coin_cost(cost);
+ send_ack();
+}
+
+void send_keypress(u8 key) {
+ /* send a packet of the form KX with X being the key, or R for reset */
+ if (is_standalone()) return;
+
+ sci_tx_buf[0] = '2';
+ if (key == KEY_RESET) {
+ sci_tx_buf[1] = '1';
+ sci_tx_buf[2] = '1';
+ } else {
+ sci_tx_buf[1] = '0';
+ sci_tx_buf[2] = (key%10)+'0';
+ }
+ sci_tx_buf[3] = '\0';
+ send_buffer(0);
+ send_string(" key." CRLF);
+}
+
+void send_door_msg(bool open) {
+ if (is_standalone()) return;
+ sci_tx_buf[0] = '4';
+ sci_tx_buf[1] = '0';
+ sci_tx_buf[2] = open?'1':'0';
+ send_buffer(0);
+ if (open)
+ send_string(" door open." CRLF);
+ else
+ send_string(" door closed." CRLF);
+}
+
+u8 hexchar2u8(char b) {
+ if (b >= '0' && b <= '9') return b-'0';
+ if (b >= 'a' && b <= 'f') return b-'a'+0x0a;
+ if (b >= 'A' && b <= 'F') return b-'A'+0x0a;
+ return 0;
+}
+
+char nibble2hexchar(u8 b) {
+ if (b <= 9) return b+'0';
+ if (b >= 10 && b <= 15) return b+'A'-10;
+ return 'X';
+}
+
+u8 hex2u8(char msb, char lsb) {
+ return (hexchar2u8(msb) << 4) + hexchar2u8(lsb);
+}
+
+static char hexconv_buf[3];
+char* u82hex(u8 a) {
+ hexconv_buf[0] = nibble2hexchar((a&0xf0) >> 4);
+ hexconv_buf[1] = nibble2hexchar(a&0x0f);
+ hexconv_buf[2] = '\0';
+ return hexconv_buf;
+}
+
+void do_chime() {
+ if (check_standalone()) return;
+ if (sci_rx_buf[1] == '\0')
+ chime_start();
+ else if (sci_rx_buf[2] != '\0' && sci_rx_buf[3] == '\0')
+ chime_for(hex2u8(sci_rx_buf[1], sci_rx_buf[2]));
+ else {
+ send_string("510 Unknown chime duration." CRLF);
+ return;
+ }
+ send_string("500 Chimed." CRLF);
+}
+
+void print_switches(u8 prompted) {
+ if (prompted)
+ send_string("600 ");
+ else
+ send_string("610 ");
+ send_string(u82hex(misc_input));
+ send_string(" ");
+ send_string(u82hex(switch_input));
+ send_string(CRLF);
+}
+
+void ping_pong() {
+ /* make sure it's really a ping */
+ if (!my_strncmp("ING", (char*)sci_rx_buf+1, 3)) {
+ unknown_command();
+ return;
+ }
+ /* respond with ack & pong */
+ send_string("000 PONG!" CRLF);
+}
+
+void send_prompt() {
+ send_string(is_standalone()?"$ ":"# ");
+}
+
+void about() {
+ if (!my_strncmp("BOUT", (char*)sci_rx_buf+1, 4)) {
+ unknown_command();
+ return;
+ }
+ send_string(
+ "-----------------------------------------------------------------" CRLF
+ "-----------------------------------------------------------------" CRLF
+ " Revision " VERSION_STRING CRLF
+ "" CRLF
+ " This snack machine was brought to you by " CRLF
+ " Bernard Blackham" CRLF
+ " Mark Tearle" CRLF
+ " Harry McNally" CRLF
+ " Michal Gornisiewicz" CRLF
+ " and others." CRLF
+ "" CRLF
+ " Another UCC project in action. http://www.ucc.asn.au/" CRLF
+ );
+}
+
+void set_echo() {
+ if (my_strncmp("CHO ON", (char*)sci_rx_buf+1, 6))
+ sci_echo = 1;
+ else if (my_strncmp("CHO OFF", (char*)sci_rx_buf+1, 7))
+ sci_echo = 0;
+ else
+ unknown_command();
+}
+
+void moo() {
+ if (!my_strncmp("OO", (char*)sci_rx_buf+1, 2)) {
+ unknown_command();
+ return;
+ }
+ send_string(
+" ____________" CRLF
+" |__________|" CRLF
+" / /\\" CRLF
+" / U C C / \\" CRLF
+" /___________/___/|" CRLF
+" | | |" CRLF
+" | ==\\ /== | |" CRLF
+" | O O | \\ \\ |" CRLF
+" | < | \\ \\|" CRLF
+" /| | \\ \\" CRLF
+" / | \\_____/ | / /" CRLF
+" / /| | / /|" CRLF
+"/||\\| | /||\\/" CRLF
+" -------------| " CRLF
+" | | | | " CRLF
+" <__/ \\__>" CRLF
+"" CRLF
+" ... Where's the cheese?" CRLF
+ );
+}
+
+void help() {
+ send_string(
+ "Valid commands are:" CRLF
+ " ABOUT ROM information" CRLF
+ " PING pongs" CRLF
+ " ECHO {ON|OFF} turn echo on or off" CRLF
+ " Vnn vend an item" CRLF
+ " VALL vend all items" CRLF
+ " DXXXXXXXXXX show a message on the display" CRLF
+ " B[nn] beep for a duration nn (optional)" CRLF
+ " S[...] query all internal switch states" CRLF
+ " H[...] this help screen" CRLF
+ " GETROM download the ROM source code using xmodem" CRLF
+ "Comments start with a #" CRLF
+ );
+}
+
+extern const char _rom_src_data[];
+extern const u16 _rom_src_len;
+void getrom() {
+ if (!my_strncmp("ETROM", (char*)sci_rx_buf+1, 5)) {
+ unknown_command();
+ return;
+ }
+ char s[4];
+ send_string("Writing to serial port (maybe). Size is 0x");
+ send_string(u82hex(_rom_src_len >> 8));
+ send_string(u82hex(_rom_src_len & 0xff));
+ send_string("@0x");
+ send_string(u82hex((u16)(&_rom_src_data) >> 8));
+ send_string(u82hex((u16)(&_rom_src_data) & 0xff));
+ send_string(" with signature ");
+ s[0] = _rom_src_data[0];
+ s[1] = _rom_src_data[1];
+ s[2] = _rom_src_data[2];
+ s[3] = '\0';
+ send_string(s);
+ send_string(CRLF " Type YES to download rom.tar.bz2 via XMODEM: ");
+ msg_clr();
+ while (!sci_have_packet); /* spin */
+ if (!my_strncmp("YES", (char*)sci_rx_buf, 3)) {
+ send_string(CRLF "Transfer cancelled." CRLF);
+ return;
+ }
+
+ sci_init();
+ sci_doing_xmodem = 1;
+ if (!xmodem_init_xfer()) {
+ sci_doing_xmodem = 0;
+ send_string("XMODEM init failed. Nobody's listening :(" CRLF);
+ return;
+ }
+ char *p = (char*)_rom_src_data;
+ char *end = (char*)_rom_src_data+_rom_src_len;
+ bool aborted = 0;
+ while (1) {
+ if (p + 128 > end) {
+ /* send partial packet */
+ if (!xmodem_send_packet((char*)p, end-p)) aborted = 1;
+ break;
+ } if ((u16)p == 0xb600) {
+ /* we have an eeprom here. skip it. */
+ p += 0x0200;
+ continue;
+ } else if (!xmodem_send_packet((char*)p, 128)) {
+ aborted = 1;
+ break;
+ }
+ p += 128;
+ }
+
+ xmodem_finish_xfer();
+ sci_doing_xmodem = 0;
+ if (aborted)
+ send_string(CRLF "Transfer aborted." CRLF);
+ else
+ send_string(CRLF "Transfer complete." CRLF);
+}
+
+void quit() {
+ if (my_strncmp("UIT", (char*)sci_rx_buf+1, 3))
+ send_string("013 You can't quit you doofus." CRLF);
+ else
+ unknown_command();
+}
+
+//SHA1_CTX ctx;
+//u8 sha1_digest[SHA1_SIGNATURE_SIZE];