X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;ds=sidebyside;f=ROM2%2Fcomm.h;h=65a344641f307719ad545be8086a4a4e9c2b6564;hb=db23b975a50ba026e1455852f4b656f18095aeb3;hp=69f8d004e60faef59b04e55d2dca1f07d81b9f5d;hpb=2e7a8beb908896930042bc0564fbd16f3e0b0b62;p=uccvend-snackrom.git

diff --git a/ROM2/comm.h b/ROM2/comm.h
index 69f8d00..65a3446 100644
--- a/ROM2/comm.h
+++ b/ROM2/comm.h
@@ -12,6 +12,7 @@
  *  KX - keypad press where X is (ascii 0..9 or R)
  *  CXXXXX - coin balance, XXXXX is number of cents.
  *  MXYY - dispense ack/nack. X is what happened (0..MOTOR_*_FAIL), YY is the motor
+ *  DX - door open/close event where X is 1 for open, 0 for closed.
  *
  * Messages Received:
  *  VXX - vend a slot XX
@@ -23,7 +24,7 @@
  *
  */
 
-#define TX_BUFFER_LEN 6 /* maximum 13 due to the way tx_int works with the FIFO */
+#define TX_BUFFER_LEN 6 /* maximum 12 due to the way tx_int works with the FIFO */
 extern char tx_buffer[TX_BUFFER_LEN+2]; /* \n + null terminated */
 #define RX_BUFFER_LEN 11
 extern volatile char rx_buffer[RX_BUFFER_LEN+1]; /* null terminated */
@@ -42,8 +43,13 @@ extern volatile u8 rx_queue_state;
  */
 extern volatile u8 tx_queue_state;
 
+extern inline void wait_for_tx_free() { while (tx_queue_state & 0x01); }
+
 void comm_init();
 void msg_clr();
+void send_packet();
+void send_ack();
+void send_nack();
 
 /*************************************/
 /*** 16550 UART specific #defines  ***/