fw-rust: Remove wrap around of values in setup

Set the temperature compensation curve to -0.11%/°C.

firmware/rust/src/lcd.rs

@@ -35,6 +35,8 @@ impl Lcd {
             0xEE, // (18) Reset Cursor Update Mode
             0x81, // (9)  Set Electronic Volume: Set Contrast
             nb::block!(eeprom::read_byte(&CONTRAST)).unwrap(), // (9)  Set Electronic Volume: Set Contrast
+            0xFA, // (25) Set Adv. Program Control 0: Set Temperature compensation curve to -0.11%/°C
+            0x90, // (25) Set Adv. Program Control 0: Set Temperature compensation curve to -0.11%/°C
             0xAF, // (12) Set Display Enable: Display on
         ];
 

firmware/rust/src/screen/setup.rs

@@ -35,7 +35,7 @@ impl Setup {
             Selection::BacklightEdit => match input {
                 Input::Next => {
                     self.backlight = if self.backlight == u8::MAX {
-                        u8::MIN
+                        u8::MAX
                     } else {
                         self.backlight + 1
                     };
@@ -44,7 +44,7 @@ impl Setup {
                 }
                 Input::Previous => {
                     self.backlight = if self.backlight == u8::MIN {
-                        u8::MAX
+                        u8::MIN
                     } else {
                         self.backlight - 1
                     };
@@ -70,7 +70,7 @@ impl Setup {
             Selection::ContrastEdit => match input {
                 Input::Next => {
                     self.contrast = if self.contrast >= 63 {
-                        u8::MIN
+                        63
                     } else {
                         self.contrast + 1
                     };
@@ -79,7 +79,7 @@ impl Setup {
                 }
                 Input::Previous => {
                     self.contrast = if self.contrast == u8::MIN {
-                        63
+                        u8::MIN
                     } else {
                         self.contrast - 1
                     };