[NUC240] Use ACMP to Reverse UART Tx Signal

• Application: This code uses ACMP as an inverter to reverse UART Tx signal.
• BSP Version: NUC230/240 Series BSP CMSIS V3.01.001
• Hardware: NuTiny-EVB-NUC240 V1.2
  

The ACMP inside MCU is used as an inverter. The ACMP positive input is UART Tx signal and the negative input is internal band-gap reference voltage. The output of ACMP is set to reverse signal.

You can download the sample code at https://www.nuvoton.com/resource-downlo ... 0617160718