Create a PLL driver for the tiva-c; to make it use a higher system clock frequency.

In development project uploaded in commit 853b77f

Use more meaningful variable names.

May use this as reference https://controllerstech.com/interface-ws2812-with-stm32/

Use function SYSCNTRL_vidConfigPWMDiv() in a new wrapper to be called from PWM driver.

Until now, the DHT11 driver is using delay based on TivaWare code. It is required to develop this driver so that it uses TIMER0 delay only.

Add ability to select the micro delay timer function used in the servo motor driver.

Create full UART driver for STM32F103 with struct for configuration.

The current verstion of the UART driver supports only Receive interrupt source, need to add the other sources of interrupt to the driver.