From 1e7218d1311dafb5c1c81e4c4ad64847432be0b5 Mon Sep 17 00:00:00 2001
From: Bernard Blackham <dagobah@ucc.asn.au>
Date: Wed, 6 Aug 2003 16:16:50 +0000
Subject: [PATCH] Beginnings of a UI.

---
 ROM2/helpers.c |  4 +--
 ROM2/main.c    | 70 ++++++++++++++++++++++++++++++++++++++++++++++----
 2 files changed, 67 insertions(+), 7 deletions(-)

diff --git a/ROM2/helpers.c b/ROM2/helpers.c
index 07ab7f4..ead76da 100644
--- a/ROM2/helpers.c
+++ b/ROM2/helpers.c
@@ -1,8 +1,8 @@
 #include "vend.h"
 
-#define DELAY_MAGIC 20 /* FIXME: number of loops required for ~ 1 millisecond */
+#define DELAY_MAGIC 20 /* FIXME: number of loops for ~ 1 millisecond (< 256) */
 void delay(u16 ms) {
-	int i;
+	u8 i;
 	for (;ms;ms--) {
 		for (i=0;i<DELAY_MAGIC; i++)
 			asm("nop\nnop\nnop\nnop\nnop\n");
diff --git a/ROM2/main.c b/ROM2/main.c
index 1567700..116704b 100644
--- a/ROM2/main.c
+++ b/ROM2/main.c
@@ -3,20 +3,78 @@
 #include "chime.h"
 #include "vend.h"
 
+u16 uid;
+u16 pin;
+
+bool uid_enter() {
+	u8 uidpos;
+	/* the user has started to type in his/her UID. grab the last key and continue
+	 * reading. Returns true if a UID was entered successfully.
+	 * The UID will be entered as 5 digits. (shorter uids should be pre-padded
+	 * with zeros)
+	 */
+	uid = last_key%10; /* 10 => 0, it was _not_ reset (hopefuly :) */
+	set_msg("UID?      ", WRAP_NONE);
+	set_char((last_key%10)+'0', 5);
+
+	for (uidpos = 2; uidpos <= 5; uidpos++) {
+		keypad_getkey();
+		if (last_key == KEY_RESET) {
+			uid = 0;
+			return 0;
+		}
+		uid = (uid*10) + (last_key%10);
+		set_char((last_key%10)+'0', 4+uidpos);
+	}
+	return 1;
+}
+
+
+bool pin_enter() {
+	u8 pinpos;
+	/* We ask for a pin, display a PIN: prompt. PINs must be a 4 digit number.
+	 * Strictly, they must be 16-bit, but it's easier to use the guarantee that
+	 * 4-digits numbers are < 65536
+	 *
+	 * Also display X's on screen as the pin is entered.
+	 */
+	set_msg("PIN?      ", WRAP_NONE);
+	for (pinpos = 1; pinpos <= 5; pinpos++) {
+		keypad_getkey();
+		if (last_key == KEY_RESET) {
+			pin = 0;
+			return 0;
+		}
+		pin = (pin*10) + (last_key%10);
+		set_char('X', 4+pinpos);
+	}
+	return 1;
+}
+
 int main() {
 	/* do stuff */
-	set_msg("UNIVERSITY");
+	set_msg("UNIVERSITY", WRAP_NONE);
 	delay(1000);
-	set_msg(" COMPUTER ");
+	set_msg(" COMPUTER ", WRAP_NONE);
 	delay(1000);
-	set_msg("   CLUB   ");
+	set_msg("   CLUB   ", WRAP_NONE);
 	delay(1000);
 
+	set_msg("UCC *** INSERT COINS OR USER-ID", WRAP_SCROLL_L);
 	while(1) {
+		/* this needs to be a relatively tight loop to make sure we catch
+		 * keypresses
+		 */
 		keypad_read();
 		if (keypad_pressed()) {
-			switch (last_key) {
-
+			if (last_key != KEY_RESET) {
+				if (uid_enter() && pin_enter()) {
+					/* authenticate them */
+				} else {
+					uid = 0;
+					pin = 0;
+					/* move on */
+				}
 			}
 		}
 	}
@@ -28,6 +86,8 @@ void _start() {
 	 */
 	display_init();
 	set_bus_expanded();
+	/* enable RTI & set rate */
+	/* init coin mech */
 	main();
 }
 
-- 
2.20.1