Use unicode standard 0xA0-0xFF for Latin 1 characters (#1263)

* Update chars 0xA0-0xFF to match unicode

* Update ui_text.hpp

Update chars 0xA0-0xFF to match unicode

* Use unicode 0xB0 for degree character

* Clang

firmware/application/ui/ui_geomap.hpp

@@ -84,8 +84,8 @@ class GeoPos : public View {
 
     Labels labels_position{
         {{1 * 8, 0 * 16}, "Alt:", Color::light_grey()},
-        {{1 * 8, 1 * 16}, "Lat:    \x90  '  \"", Color::light_grey()},  // 0x90 is degree ° symbol in our 8x16 font
+        {{1 * 8, 1 * 16}, "Lat:    \xB0  '  \"", Color::light_grey()},  // 0xB0 is degree ° symbol in our 8x16 font
-        {{1 * 8, 2 * 16}, "Lon:    \x90  '  \"", Color::light_grey()},
+        {{1 * 8, 2 * 16}, "Lon:    \xB0  '  \"", Color::light_grey()},
     };
 
     NumberField field_altitude{

firmware/common/ui_text.cpp

@@ -24,11 +24,26 @@
 namespace ui {
 
 Glyph Font::glyph(const char c) const {
+    size_t index;
+
     if (c < c_start) {
+        // Non-display C0 Control characters - map to blank (index 0)
         return {w, h, data};
     }
-    const size_t index = c - c_start;
+
-    if (index >= c_count) {
+    // Handle gap in glyphs table for C1 Control characters 0x80-0x9F
+    if (c < C1_CONTROL_CHARS_START) {
+        // ASCII chars <0x80:
+        index = c - c_start;
+    } else if (c >= C1_CONTROL_CHARS_START + C1_CONTROL_CHARS_COUNT) {
+        // Latin 1 chars 0xA0-0xFF
+        index = c - c_start - C1_CONTROL_CHARS_COUNT;
+    } else {
+        // C1 Control characters - map to blank
+        return {w, h, data};
+    }
+
+    if (index >= c_count) {  // Latin Extended characters > 0xFF - not supported
         return {w, h, data};
     } else {
         return {w, h, &data[index * data_stride]};

firmware/common/ui_text.hpp

@@ -28,6 +28,10 @@
 
 #include "ui.hpp"
 
+// C1 Control Characters are an unprintable range of glyphs missing from the font files
+#define C1_CONTROL_CHARS_START 0x80
+#define C1_CONTROL_CHARS_COUNT 32
+
 namespace ui {
 
 class Glyph {