minimal-printf: Disable float by default

Author: bulislaw

platform/mbed_lib.json

@@ -145,7 +145,7 @@
         },
         "minimal-printf-enable-floating-point": {
             "help": "Enable floating point printing when using minimal printf library",
-            "value": true
+            "value": false
         },
         "minimal-printf-set-floating-point-max-decimals": {
             "help": "Maximum number of decimals to be printed when using minimal printf library",

platform/source/minimal-printf/README.md

@@ -12,17 +12,17 @@ Supports:
 * %u: unsigned integer [h, hh, (none), l, ll, z, j, t].
 * %x: unsigned integer [h, hh, (none), l, ll, z, j, t], printed as hexadecimal number (e.g., ff).
 * %X: unsigned integer [h, hh, (none), l, ll, z, j, t], printed as hexadecimal number (e.g., FF).
-* %f: floating point (enabled by default).
-* %F: floating point (enabled by default, treated as %f).
-* %g: floating point (enabled by default, treated as %f).
-* %G: floating point (enabled by default, treated as %f).
+* %f: floating point (disabled by default).
+* %F: floating point (disabled by default, treated as %f).
+* %g: floating point (disabled by default, treated as %f).
+* %G: floating point (disabled by default, treated as %f).
 * %c: character.
 * %s: string.
 * %p: pointer (e.g. 0x00123456).
 
 Note that support for:
 * 64b modifiers is only present when `minimal-printf-enable-64-bit` config is set to `true` (default).
-* Floating point parameters is only present when `minimal-printf-enable-floating-point` config is set to `true` (default).
+* Floating point parameters is only present when `minimal-printf-enable-floating-point` config is set to `true` (disabled by default).
 
 Unrecognized format specifiers are treated as ordinary characters.
 
@@ -34,8 +34,6 @@ Floating point limitations:
 
 As of Mbed OS 6.0 this is enabled by default. To replace the standard implementation of the printf functions with the ones in this library for older versions of Mbed:
 
-To replace the standard implementation of the printf functions with the ones in this library:
-
 Modify your application configuration file to override the parameter `target.printf_lib` with the value `minimal-printf` as shown below:
 
 ```json
@@ -70,27 +68,24 @@ Minimal printf is configured by the following parameters defined in `platform/mb
     "name": "platform",
     "config": {
         "minimal-printf-enable-64-bit": {
-            "help": "Enable printing 64 bit integers when using minimal-printf profile",
+            "help": "Enable printing 64 bit integers when using minimal printf library",
             "value": true
         },
         "minimal-printf-enable-floating-point": {
-            "help": "Enable floating point printing when using minimal-printf profile",
-            "value": true
+            "help": "Enable floating point printing when using minimal printf library",
+            "value": false
         },
         "minimal-printf-set-floating-point-max-decimals": {
-            "help": "Maximum number of decimals to be printed",
+            "help": "Maximum number of decimals to be printed when using minimal printf library",
             "value": 6
         }
-   }
+    }
 }
 ```
 
-By default, 64 bit integers and floating point support is enabled.
-
-If your target does not require some options then you can override the default configuration in your application `mbed_app.json` and achieve further memory optimisation (see next section for size comparison numbers).
-
-In mbed_app.json:
+By default, 64 bit integers support is enabled, but floating point support is disabled to increase memory savings.
 
+If your application needs to override the default configuration add following section to your `mbed_app.json`:
 ```json
     "target_overrides": {
         "*": {