From 18114ee5764da58d3b66c7edd223af306bb5540c Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@mur.at>
Date: Fri, 22 Jul 2011 21:45:49 +0000
Subject: first version of base32 encoder (not working yet)

git-svn-id: https://svn.spreadspace.org/mur.sat@35 7de4ea59-55d0-425e-a1af-a3118ea81d4c
---
 software/ttx/ttx.asm | 204 ++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 192 insertions(+), 12 deletions(-)

(limited to 'software')

diff --git a/software/ttx/ttx.asm b/software/ttx/ttx.asm
index 4c2a703..ee94de7 100644
--- a/software/ttx/ttx.asm
+++ b/software/ttx/ttx.asm
@@ -36,27 +36,37 @@
   
   ;; -------------------------------------
   ;; DEFINES
-BEACON_INT  EQU .5              ; *2 = Beacon Interval in seconds
-SECCNT      EQU H'007D'
+  ;;   constants
 
-CHAR        EQU H'0041'
-CHARCNT     EQU H'0042'
-ELEMENT     EQU H'0043'
-ELECNT      EQU H'0044'
-  
 DOT         EQU .256 -  .29
 DASH        EQU .256 -  .87
 ESPACE      EQU .256 -  .29
 CSPACE      EQU .256 -  .87
 WSPACE      EQU .256 - .203
-
 ENABLE_TIME EQU .256 -  .10
+BEACON_INT  EQU .5              ; *2 = Beacon Interval in seconds
 
+  ;;   I/O Pins
 CWENABLE    EQU GP0
 CWOUT       EQU GP1
 SCLK        EQU GP2
 SDAT        EQU GP4
 
+  ;;   variables
+  ;;     page 0 only
+ELEMENT     EQU H'0040'
+ELECNT      EQU H'0041'
+CHAR        EQU H'0042'
+PARITY      EQU H'0043'
+CHARCNT     EQU H'0044'
+PENTLE0     EQU H'0045'
+PENTLE1     EQU H'0046'
+PENTLECNT   EQU H'0047'
+
+BUF         EQU H'0050'
+
+  ;;     all pages
+SECCNT      EQU H'007D'
 W_TEMP      EQU H'007E'
 STATUS_TEMP EQU H'007F'
 
@@ -263,6 +273,7 @@ getcwlen
   retlw     .4                          ; Y
   retlw     .4                          ; Z
 
+  ;; Base32 Code
 base32
   addwf     PCL,f
   nop
@@ -331,7 +342,9 @@ send_char
   movf      ELECNT,f
   btfsc     STATUS,Z
   return
-
+  movf      CHAR,w
+  xorwf     PARITY,f
+  
 char_next_element
   bsf       GPIO,CWOUT
   btfss     ELEMENT,7
@@ -372,20 +385,187 @@ callsign_cspace
   
   ;; -------------------------------------
 send_base32
-  return                        ; TODO
+  movwf     PENTLECNT
+
+case0  
+  movf      INDF,w
+  movwf     PENTLE0
+  andlw     b'00011111'
+  call      base32
+  call      send_char
+  decfsz    PENTLECNT,f
+  goto      case1
+  return
+
+case1
+  movlw     CSPACE
+  call      dottime
+  swapf     PENTLE0,f
+  rrf       PENTLE0,w
+  andlw     b'00000111'
+  movwf     PENTLE0
+  incf      FSR,f
+  movf      INDF,w
+  movwf     PENTLE1
+  rlf       PENTLE1,f
+  rlf       PENTLE1,f
+  rlf       PENTLE1,w
+  andlw     b'00011000'
+  iorwf     PENTLE0,w
+  call      base32
+  call      send_char
+  decfsz    PENTLECNT,f
+  goto      case2
+  return
+
+case2
+  movlw     CSPACE
+  call      dottime
+  movf      INDF,w
+  movwf     PENTLE0
+  rrf       PENTLE0,f
+  rrf       PENTLE0,w
+  andlw     b'00011111'
+  call      base32
+  call      send_char
+  decfsz    PENTLECNT,f
+  goto      case3
+  return
+
+case3
+  movlw     CSPACE
+  call      dottime
+  rrf       PENTLE0,f
+  rrf       PENTLE0,f
+  swapf     PENTLE0,w
+  andlw     b'00000001'
+  movwf     PENTLE0
+  incf      FSR,f
+  movf      INDF,w
+  movwf     PENTLE1
+  rlf       PENTLE1,w
+  andlw     b'00011110'
+  iorwf     PENTLE0,w
+  call      base32
+  call      send_char
+  decfsz    PENTLECNT,f
+  goto      case4
+  return
+
+case4
+  movlw     CSPACE
+  call      dottime
+  swapf     INDF,w
+  andlw     b'00001111'
+  movwf     PENTLE0
+  incf      FSR,f
+  btfsc     INDF,0
+  bsf       PENTLE0,4
+  movf      PENTLE0,w
+  call      base32
+  call      send_char
+  decfsz    PENTLECNT,f
+  goto      case5
+  return
+
+case5
+  movlw     CSPACE
+  call      dottime
+  movf      INDF,w
+  movwf     PENTLE0
+  rrf       PENTLE0,w
+  andlw     b'00011111'
+  call      base32
+  call      send_char
+  decfsz    PENTLECNT,f
+  goto      case6
+  return
+
+case6
+  movlw     CSPACE
+  call      dottime
+  swapf     INDF,w
+  movwf     PENTLE0
+  rrf       PENTLE0,f
+  rrf       PENTLE0,w
+  andlw     b'00000011'
+  movwf     PENTLE0
+  incf      FSR,f
+  movf      INDF,w
+  movwf     PENTLE1
+  rlf       PENTLE1,f
+  rlf       PENTLE1,f
+  andlw     b'00011100'
+  iorwf     PENTLE0,w
+  call      base32
+  call      send_char
+  decfsz    PENTLECNT,f
+  goto      case7
+  return
+
+case7
+  movlw     CSPACE
+  call      dottime
+  movf      INDF,w
+  movwf     PENTLE0
+  rrf       PENTLE0,f
+  rrf       PENTLE0,f
+  rrf       PENTLE0,w
+  andlw     b'00011111'
+  call      base32
+  call      send_char
+  decfsz    PENTLECNT,f
+  goto      caseend
+  return
+
+caseend
+  movlw     CSPACE
+  call      dottime
+  incf      FSR,f
+  goto      case0
   
+  ;; -------------------------------------
+send_parity
+  return                        ; TODO
+
   ;; -------------------------------------
 send_beacon
   bsf       GPIO,CWENABLE
   movlw     ENABLE_TIME
   call      dottime
-  
+  clrf      PARITY
+
   call      send_callsign
+  movlw     WSPACE
+  call      dottime
+
+  movlw     b'01010101'
+  movwf     BUF
+  movlw     b'10101010'
+  movwf     BUF + 1
+  movlw     b'11110000'
+  movwf     BUF + 2
+  movlw     b'00001111'
+  movwf     BUF + 3
+  movlw     b'00111100'
+  movwf     BUF + 4
+  movlw     b'11000011'
+  movwf     BUF + 5
+  movlw     b'10101010'
+  movwf     BUF + 6
+  
+  movlw     BUF
+  movwf     FSR
+  movlw     .10
+  call      send_base32
+
+  ;; movlw     WSPACE
+  ;; call      dottime
+  ;; call      send_parity
   
   bcf       GPIO,CWENABLE
   return
 
-
   ;; -------------------------------------
   ;; MAINLOOP
 main
-- 
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