From 7f536e1a07e4be3e5f86e0d65afcf2ac7eb55150 Mon Sep 17 00:00:00 2001
From: Zilog80 <rs1729@users.noreply.github.com>
Date: Mon, 7 Dec 2015 14:39:25 +0100
Subject: [PATCH] clean-up

---
 m10/m10x.c           | 25 ++++++++++---------------
 rs92/rs92gps.c       |  4 +++-
 rs92/rs92gps_rawin.c |  4 +++-
 3 files changed, 16 insertions(+), 17 deletions(-)

diff --git a/m10/m10x.c b/m10/m10x.c
index a3069c9..9a8adb5 100644
--- a/m10/m10x.c
+++ b/m10/m10x.c
@@ -208,22 +208,16 @@ dduudduudduudduu duduudduuduudduu  ddududuudduduudd uduuddududududud uudduduuddu
  0 0 0 0 0 0 0 0  1 1 - - - 0 0 0   0 1 1 0 0 1 0 0  1 0 0 1 1 1 1 1  0 0 1 0 0 0 0 0
 */
 
-#define BYTELEN 8
- 
-char bits[BYTELEN+1];
-int bitpos = 0;
-
-unsigned char header_bytes[] = { 0x00, 0x00}; //{0x64, 0x9F, 0x20 }; // ggf. an header[] anpassen
-#define HEADLEN 32
-#define HEADOFS 0
+#define BITS 8
+#define HEADLEN 32  // HEADLEN+HEADOFS=32 <= strlen(header)
+#define HEADOFS  0
                  // Sync-Header                     // Sonde-Header
 char header[] = "11001100110011001010011001001100"; //"011001001001111100100000"; // M10: 64 9F 20 , M2K2: 64 8F 20
                                                     //"011101101001111100100000"; // M??: 76 9F 20
                                                     //"011001000100100100001001"; // M10-dop: 64 49 09
-int header_found = 0;
 
-#define FRAME_LEN       102
-#define BITFRAME_LEN    (FRAME_LEN*BYTELEN)
+#define FRAME_LEN        102
+#define BITFRAME_LEN    (FRAME_LEN*BITS)
 #define RAWBITFRAME_LEN (BITFRAME_LEN*2)
 
 char buf[HEADLEN];
@@ -247,6 +241,7 @@ char cb_inv(char c) {
 }
 
 // Gefahr bei Manchester-Codierung: inverser Header wird leicht fehl-erkannt
+// da manchester1 und manchester2 nur um 1 bit verschoben
 int compare2() {
     int i, j;
 
@@ -285,7 +280,7 @@ int bits2bytes(char *bitstr, int *bytes) {
 
         byteval = 0;
         d = 1;
-        for (i = 0; i < BYTELEN; i++) { 
+        for (i = 0; i < BITS; i++) { 
             //bit=*(bitstr+bitpos+i); /* little endian */
             bit=*(bitstr+bitpos+7-i);  /* big endian */
             // bit == 'x' ?
@@ -293,7 +288,7 @@ int bits2bytes(char *bitstr, int *bytes) {
             else /*if ((bit == '0') || (bit == 'x'))*/  byteval += 0;
             d <<= 1;
         }
-        bitpos += BYTELEN;
+        bitpos += BITS;
         bytes[bytepos++] = byteval;
         
     }
@@ -570,6 +565,7 @@ int main(int argc, char **argv) {
     char *fpname;
     int i, bit, len;
     int pos;
+    int header_found = 0;
 
 
 #ifdef WIN
@@ -622,13 +618,12 @@ int main(int argc, char **argv) {
     }
 
 
-    bufpos = 0;
     pos = FRAMESTART;
 
     while (!read_bits_fsk(fp, &bit, &len)) {
 
         if (len == 0) { // reset_frame();
-            if (pos > (pos_GPSweek+2)*2*BYTELEN) {
+            if (pos > (pos_GPSweek+2)*2*BITS) {
                 for (i = pos; i < RAWBITFRAME_LEN; i++) frame_rawbits[i] = 0x30 + 0;
                 print_frame(pos);//byte_count
                 header_found = 0;
diff --git a/rs92/rs92gps.c b/rs92/rs92gps.c
index 3926106..f4a7d84 100644
--- a/rs92/rs92gps.c
+++ b/rs92/rs92gps.c
@@ -246,7 +246,9 @@ int read_bits_fsk(FILE *fp, int *bit, int *len) {
 
 /* ------------------------------------------------------------------------------------ */
 
-// RS92-SGP: 8N1 manchester
+// manchester1 1->10,0->01: 1.bit
+// manchester2 0->10,1->01: 2.bit
+// RS92-SGP: 8N1 manchester2
 char manch(char *mbits) {
    if      ((mbits[0] == 1) && (mbits[1] == 0)) return 0;
    else if ((mbits[0] == 0) && (mbits[1] == 1)) return 1;
diff --git a/rs92/rs92gps_rawin.c b/rs92/rs92gps_rawin.c
index 7ae4fc3..cfb5d34 100644
--- a/rs92/rs92gps_rawin.c
+++ b/rs92/rs92gps_rawin.c
@@ -241,7 +241,9 @@ int read_bits_fsk(FILE *fp, int *bit, int *len) {
 
 /* ------------------------------------------------------------------------------------ */
 
-// RS92-SGP: 8N1 manchester
+// manchester1 1->10,0->01: 1.bit
+// manchester2 0->10,1->01: 2.bit
+// RS92-SGP: 8N1 manchester2
 char manch(char *mbits) {
    if      ((mbits[0] == 1) && (mbits[1] == 0)) return 0;
    else if ((mbits[0] == 0) && (mbits[1] == 1)) return 1;