From 677385ffdd1e330cfba4dd712ca58595feeea41d Mon Sep 17 00:00:00 2001
From: schneefux <schneefux+commit@schneefux.xyz>
Date: Mon, 7 Oct 2013 14:11:24 +0200
Subject: initial commit

---
 key.c | 101 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 key.c

(limited to 'key.c')

diff --git a/key.c b/key.c
new file mode 100644
index 0000000..20ea4f2
--- /dev/null
+++ b/key.c
@@ -0,0 +1,101 @@
+#include "global.h"
+#include "key.h"
+#include "hardware.h"
+
+static const unsigned short* keyboard_register = (unsigned short*)0xA44B0000;
+static unsigned short lastkey[8];
+
+int PRGM_GetKey()
+{
+	unsigned char buffer[12];
+	Keyboard_PRGM_GetKey( buffer );
+	return (buffer[1] & 0x0F) * 10 + ((buffer[2] & 0xF0)  >> 4);
+}
+
+static void delay()
+{
+	unsigned int i;
+	for(i=0 ; i<5 ; i++);
+}
+
+static unsigned char CheckKeyRow(int code)
+{
+	unsigned int result=0;
+	short*PORTB_CTRL=(void*)0xA4000102;
+	short*PORTM_CTRL=(void*)0xA4000118;
+	char*PORTB=(void*)0xA4000122;
+	char*PORTM=(void*)0xA4000138;
+	char*PORTA=(void*)0xA4000120;
+	short smask;
+	char cmask;
+	unsigned char column, row;
+
+	column = code>>4;
+	row = code &0x0F;
+
+	smask = 0x0003 << (( row %8)*2);
+	cmask = ~( 1 << ( row %8) );
+	if(row <8)
+	{
+		*PORTB_CTRL = 0xAAAA ^ smask;
+		*PORTM_CTRL = (*PORTM_CTRL & 0xFF00 ) | 0x00AA;
+		delay();
+		*PORTB = cmask;
+		*PORTM = (*PORTM & 0xF0 ) | 0x0F;
+	}
+	else
+	{
+		*PORTB_CTRL = 0xAAAA;
+		*PORTM_CTRL = ((*PORTM_CTRL & 0xFF00 ) | 0x00AA)  ^ smask;
+		delay();
+		*PORTB = 0xFF;
+		*PORTM = (*PORTM & 0xF0 ) | cmask;
+	}
+	delay();
+	result = (~(*PORTA))>>column & 1;
+	delay();
+	*PORTB_CTRL = 0xAAAA;
+	*PORTM_CTRL = (*PORTM_CTRL & 0xFF00 ) | 0x00AA;
+	delay();
+	*PORTB_CTRL = 0x5555;
+	*PORTM_CTRL = (*PORTM_CTRL & 0xFF00 ) | 0x0055;
+	delay();
+	
+	return result;
+}
+
+void keyupdate()
+ {
+ 	if(getCalc() == fx9860GII_2)
+ 	{
+		memcpy(lastkey, keyboard_register, sizeof(unsigned short) << 3);
+    	}
+}
+ 
+int keydown(int code)
+{
+	if(getCalc() != UNKNOWN)
+	{
+		if(getCalc() == fx9860GII_2)
+		{
+			unsigned char row = code%10;
+			
+			return (0 != (lastkey[row >> 1] & 1 << code / 10 - 1 + ((row & 1) << 3)));
+		}
+		else
+		{
+			return CheckKeyRow((code % 10) + ((code / 10 - 1) << 4));
+		}
+	}
+	else
+	{
+		if(IsEmulator)
+		{
+			return CheckKeyRow((code % 10) + ((code / 10 - 1) << 4));
+		}
+		else
+		{
+			return PRGM_GetKey() == code;
+		}
+	}
+}
-- 
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