From 198142e115461bf3aab5b024bed997443450db16 Mon Sep 17 00:00:00 2001
From: Diego Roversi <diegor@tiscali.it>
Date: Sat, 18 Nov 2017 17:07:55 +0100
Subject: Before crazy changes...

---
 TERES-HID/KeyboardMouse.c | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/TERES-HID/KeyboardMouse.c b/TERES-HID/KeyboardMouse.c
index aec2e21..1634a9d 100644
--- a/TERES-HID/KeyboardMouse.c
+++ b/TERES-HID/KeyboardMouse.c
@@ -350,20 +350,22 @@ CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t *
 
         DDRB = 0xff;
 
-        for (colmn = 0; colmn < 8; colmn++) {
+        for (colmn = 0; colmn < 8; colmn++) { // y ?
 
             uint8_t         keynow = 0;
-
+            
+            // that's crazy... here we set d4=1 (x14-15) and then read from port B (y0..y7)
+            // even if we are supposed to set Y0 and then read along X
             if (colmn == 0) {
                 cli();
-                DDRB = 0x00;
-                PORTB = 0x00;
-                DDRD = (1 << 4);
-                PORTD = (1 << 4);
+                DDRB = 0x00; // all input
+                PORTB = 0x00; // pull up off
+                DDRD = (1 << 4); // d4 output
+                PORTD = (1 << 4); // d4 = 1 -> x14-15
 
                 Delay_MS(2);
 
-                if (PINB & 0x40) {
+                if (PINB & 0x40) { //b6(y6) == 1 -> Fn Key 
                     fn = 112;
                     // tp_guarder();
                     if (PINB & 0x01) {
@@ -403,10 +405,10 @@ CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t *
                 }
 
                 // x0
-                DDRD = (1 << 6);
-                PORTD = (1 << 6);
-                DDRB = 0x00;
-                PORTB = 0x00;
+                DDRD = (1 << 6); // d6 output (x0)
+                PORTD = (1 << 6);// d6 =1
+                DDRB = 0x00;     // input
+                PORTB = 0x00;    // no pullup
                 Delay_MS(2);
 
                 if (PINB & 0x10) {
@@ -432,13 +434,12 @@ CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t *
                 PORTD = 0xfc;
                 Delay_MS(3);
                 sei();
-            }
+            } // if colmn==0
 
             PORTB = rowY[colmn];
             while (PINB != rowY[colmn]);
 
-            x = 1;
-
+            x = 1;              // 1
             if ((PINC & (1 << 7)) == 0) {
                 // tp_guarder();
                 keynow = keys[colmn * 14 + x + fn];
@@ -453,7 +454,6 @@ CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t *
                 add_key(KeyboardReport,keynow);
             }
             x++;                // 3
-            // Delay_MS(5);
             if ((PIND & (1 << 7)) == 0) {
                 // tp_guarder();
                 keynow = keys[colmn * 14 + x + fn];
-- 
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