From 3732d7623f52ca9391c49e37857f009e6dc801c5 Mon Sep 17 00:00:00 2001
From: Jonathan Hudson <jh+github@daria.co.uk>
Date: Mon, 21 Mar 2022 02:58:10 +0000
Subject: [PATCH] implement canonial terminal back delete (#1712)

---
 radio/src/cli.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/radio/src/cli.cpp b/radio/src/cli.cpp
index 02f9264db..2824c5ed3 100644
--- a/radio/src/cli.cpp
+++ b/radio/src/cli.cpp
@@ -1650,7 +1650,7 @@ int cliExecLine(char * line)
 #define CHAR_LF         0x0A
 #define CHAR_NEWPAGE    0x0C
 #define CHAR_CR         0x0D
-#define CHAR_BACKSPACE  0xFF
+#define CHAR_DEL        0x7F
 
 void cliTask(void * pdata)
 {
@@ -1684,10 +1684,12 @@ void cliTask(void * pdata)
       cliPrompt();
       break;
 
-    case CHAR_BACKSPACE:
+    case CHAR_DEL:
       if (pos) {
         line[--pos] = '\0';
-        cliSerialPutc(c);
+        cliSerialPutc('\010');
+        cliSerialPutc(' ');
+        cliSerialPutc('\010');
       }
       break;