Matr1x.

Results 2 issues of Matr1x.

**Describe the set-up** * MCU: STM32F722RET6 * Complier: arm-none-eabi-gcc version 13.2.1 20231009 (Arm GNU Toolchain 13.2.rel1 (Build arm-13.7)) * Debugger: GNU gdb (Arm GNU Toolchain 13.2.rel1 (Build arm-13.7)) 13.2.90.20231008-git **Describe...

bug
hal
needs clarification
usart

This helps to prevent an extra while() search loop. Also fixed: `HasWord(char letter)` should return `false` when `letter` is not a valid word (`IsWord(letter) == false`)