6 files changed, 59 insertions, 20 deletions
diff --git a/.gitignore b/.gitignore
index 6eda36c..c7f72fc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,35 @@
 
-# Created by https://www.toptal.com/developers/gitignore/api/kicad,linux,windows,macos,vim
-# Edit at https://www.toptal.com/developers/gitignore?templates=kicad,linux,windows,macos,vim
+# Created by https://www.toptal.com/developers/gitignore/api/vim,kicad,linux,macos,windows,assembler,atmelstudio
+# Edit at https://www.toptal.com/developers/gitignore?templates=vim,kicad,linux,macos,windows,assembler,atmelstudio
+
+### Assembler ###
+*.exe
+*.o
+*.obj
+*.bc
+
+### AtmelStudio ###
+## Ignore Atmel Studio temporary files and build results
+# https://www.microchip.com/mplab/avr-support/atmel-studio-7
+
+# Atmel Studio is powered by an older version of Visual Studio,
+# so most of the project and solution files are the same as VS files,
+# only prefixed by an `at`.
+
+#Build Directories
+[Dd]ebug/
+[Rr]elease/
+
+#Build Results
+*.d
+*.eep
+*.elf
+*.hex
+*.map
+*.srec
+
+#User Specific Files
+*.atsuo
 
 ### KiCad ###
 # For PCBs designed using KiCad: http://www.kicad-pcb.org/
@@ -127,6 +156,6 @@ $RECYCLE.BIN/
 # Windows shortcuts
 *.lnk
 
-# End of https://www.toptal.com/developers/gitignore/api/kicad,linux,windows,macos,vim
+# End of https://www.toptal.com/developers/gitignore/api/vim,kicad,linux,macos,windows,assembler,atmelstudio
 
 /Hardware/fabrication/
diff --git a/Software/pinlock.asm b/Software/pinlock.asm
index ee80741..ba12dc9 100644
--- a/Software/pinlock.asm
+++ b/Software/pinlock.asm
@@ -5,6 +5,8 @@
 .def cnt = r19
 .def tmp1 = r20
 .def tmp2 = r21
+.def ret0 = r22
+.def ret1 = r23
 
 init:
   ldi tmp0, HIGH(RAMEND)
@@ -18,7 +20,7 @@ init:
   out DDRA, tmp0
   ldi tmp0, 0b11111111
   out DDRB, tmp0
-  ldi tmp0, 0b11000000
+  ldi tmp0, 0b11101100
   out DDRD, tmp0
   ldi tmp0, 0b00000000
   out PORTD, tmp0
@@ -39,6 +41,7 @@ init:
 main:
 	ldi par0, 0b11111111
 	rcall status
+	rjmp [tmp0]
 
 wait:
   mov tmp0, par0
@@ -52,7 +55,10 @@ wait:
   ret
 
 ; Output the status
+; Parameters:
 ; par0 = Status bits
+; Returns:
+; None
 status:
 	ldi tmp0, 1
 status_loop:
@@ -77,9 +83,12 @@ status_end:
 	brne status_loop
 	ret
 
-; Display the digit on a given display
+; Display the digit on a given display.
+; Parameters:
 ; par0 = Display number
 ; par1 = Digit
+; Returns:
+; None
 display:
 	mov tmp0, par1
 	andi tmp0, 0x0F
@@ -124,3 +133,19 @@ display_3:
 	or tmp1, tmp0
 	out PORTB, tmp1
 	ret
+
+; Read the input buttons.
+; Parameters:
+; None
+; Returns:
+; ret0 = 123A456B
+; ret1 = 789C*0#D
+input:
+	; Write selection rows
+	ldi tmp0, 1
+	ldi tmp1, 1
+input_loop:
+	mov tmp2, tmp0
+	and tmp2, tmp1
+	cp tmp1, tmp2
+	breq input_set
diff --git a/Software/pinlock.cof b/Software/pinlock.cof
deleted file mode 100644
index e69de29..0000000
--- a/Software/pinlock.cof
+++ /dev/null
diff --git a/Software/pinlock.eep.hex b/Software/pinlock.eep.hex
deleted file mode 100644
index 1996e8f..0000000
--- a/Software/pinlock.eep.hex
+++ /dev/null
@@ -1 +0,0 @@
-:00000001FF
diff --git a/Software/pinlock.hex b/Software/pinlock.hex
deleted file mode 100644
index 222b940..0000000
--- a/Software/pinlock.hex
+++ /dev/null
@@ -1,14 +0,0 @@
-:020000020000FC
-:1000000004E00EBF0FE51FEF2FEF17D00DBF0FEF6E
-:100010000ABB0FEF07BB00EC01BB00E002BB10E026
-:1000200020E027D011E021E024D012E022E021D00E
-:1000300013E023E01ED01FEF09D0012F1A95000016
-:10004000E1F7102F2A950000C1F7089501E0412F34
-:100050004023041729F04FE342BB4FEB42BB05C0DE
-:100060004FE742BB4FEF42BB00C0000F003079F7B3
-:100070000895022F0F70103039F0113051F0123006
-:1000800069F01330A1F008954BB3407F402B4BBB78
-:10009000089548B3407F402B48BB08954BB34F7041
-:1000A000000F000F000F000F402B4BBB089548B30B
-:1000B0004F70000F000F000F000F402B48BB08953A
-:00000001FF
diff --git a/Software/pinlock.obj b/Software/pinlock.obj
deleted file mode 100644
index 7c4452f..0000000
--- a/Software/pinlock.obj
+++ /dev/null