From 5b8f33bd78d89c17dee0e4fb89965e2880a3c594 Mon Sep 17 00:00:00 2001
From: Attila Veghelyi <aveghelyi@dension.com>
Date: Thu, 29 Sep 2022 15:42:44 +0200
Subject: [PATCH 1/2] Add bit reverse order feature

---
 src/tty.c | 34 +++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/src/tty.c b/src/tty.c
index a3f674c..d5fb7af 100644
--- a/src/tty.c
+++ b/src/tty.c
@@ -84,6 +84,7 @@
 #define KEY_H 0x68
 #define KEY_L 0x6C
 #define KEY_SHIFT_L 0x4C
+#define KEY_M 0x6D
 #define KEY_P 0x70
 #define KEY_Q 0x71
 #define KEY_S 0x73
@@ -126,6 +127,7 @@ static bool map_o_cr_nl = false;
 static bool map_o_nl_crnl = false;
 static bool map_o_del_bs = false;
 static bool map_o_ltu = false;
+static bool map_o_msblsb = false;
 static char hex_chars[2];
 static unsigned char hex_char_index = 0;
 static char tty_buffer[BUFSIZ*2];
@@ -410,6 +412,7 @@ void handle_command_sequence(char input_char, char previous_char, char *output_c
                 tio_printf(" ctrl-%c h       Toggle hexadecimal mode", option.prefix_key);
                 tio_printf(" ctrl-%c l       Clear screen", option.prefix_key);
                 tio_printf(" ctrl-%c L       Show line states", option.prefix_key);
+                tio_printf(" ctrl-%c m       Toggle MSB to LSB bit order", option.prefix_key);
                 tio_printf(" ctrl-%c p       Pulse serial port line", option.prefix_key);
                 tio_printf(" ctrl-%c q       Quit", option.prefix_key);
                 tio_printf(" ctrl-%c s       Show statistics", option.prefix_key);
@@ -498,6 +501,20 @@ void handle_command_sequence(char input_char, char previous_char, char *output_c
                 printf("\033c");
                 break;
 
+            case KEY_M:
+                /* Toggle bit order */
+                if (!map_o_msblsb)
+                {
+                    map_o_msblsb = true;
+                    tio_printf("Switched to reverse bit order");
+                }
+                else
+                {
+                    map_o_msblsb = false;
+                    tio_printf("Switched to normal bit order");
+                }
+                break;
+
             case KEY_Q:
                 /* Exit upon ctrl-t q sequence */
                 exit(EXIT_SUCCESS);
@@ -860,6 +877,10 @@ void tty_configure(void)
             {
                 map_o_ltu = true;
             }
+            else if (strcmp(token, "MSB2LSB") == 0)
+            {
+                map_o_msblsb = true;
+            }
             else
             {
                 printf("Error: Unknown mapping flag %s\n", token);
@@ -1219,8 +1240,19 @@ int tty_connect(void)
                         }
                     }
 
+                    /* Convert MSB to LSB bit order */
+                    if (map_o_msblsb)
+                    {
+                        char ch = input_char;
+                        input_char = 0;
+                        for (int j = 0; j < 8; ++j)
+                        {
+                            input_char |= ((1 << j) & ch) ? (1 << (7 - j)) : 0;
+                        }
+                    }
+
                     /* Map input character */
-                    if ((input_char == '\n') && (map_i_nl_crnl))
+                    if ((input_char == '\n') && (map_i_nl_crnl) && (!map_o_msblsb))
                     {
                         print('\r');
                         print('\n');

From 49249692686c01f5eb16a0c8b747107a6fa5c927 Mon Sep 17 00:00:00 2001
From: Attila Veghelyi <aveghelyi@dension.com>
Date: Thu, 29 Sep 2022 17:33:35 +0200
Subject: [PATCH 2/2] Complete bit reorder feature for release

---
 man/tio.1.in               | 2 ++
 man/tio.1.txt              | 2 ++
 src/bash-completion/tio.in | 2 +-
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/man/tio.1.in b/man/tio.1.in
index ac03318..936ab5c 100644
--- a/man/tio.1.in
+++ b/man/tio.1.in
@@ -167,6 +167,8 @@ Map DEL to BS on output
 Map NL to CR-NL on output
 .IP "\fBOLTU"
 Map lowercase characters to uppercase on output
+.IP "\fBMSB2LSB"
+Map MSB bit order to LSB on output
 .P
 If defining more than one flag, the flags must be comma separated.
 .RE
diff --git a/man/tio.1.txt b/man/tio.1.txt
index 0399b63..3e03611 100644
--- a/man/tio.1.txt
+++ b/man/tio.1.txt
@@ -131,6 +131,8 @@ OPTIONS
 
               OLTU        Map lowercase characters to uppercase on output
 
+              MSB2LSB     Map MSB bit order to LSB on output
+
               If defining more than one flag, the flags must be comma separated.
 
        -x, --hexadecimal
diff --git a/src/bash-completion/tio.in b/src/bash-completion/tio.in
index ca115e6..7e110f6 100644
--- a/src/bash-completion/tio.in
+++ b/src/bash-completion/tio.in
@@ -94,7 +94,7 @@ _tio()
             return 0
             ;;
         -m | --map)
-            COMPREPLY=( $(compgen -W "ICRNL IGNCR INLCR INLCRNL OCRNL ODELBS ONLCRNL" -- ${cur}) )
+            COMPREPLY=( $(compgen -W "ICRNL IGNCR INLCR INLCRNL OCRNL ODELBS ONLCRNL MSB2LSB" -- ${cur}) )
             return 0
             ;;
         -t | --timestamp)