WITHOUT USING HAL LIBRARY

Consider the system described below and answer the subsequent question.

System Configuration:

Inputs: SW$1$ and SW$2$ switches

Output: LED$1$

Key Hardware Configurations:

SW$1$ is connected to PA$1$ using positive logic.

$SW2$ is connected to PA$2$ using negative logic.

LED$1$ is connected to PC$4$ with negative logic.

Software Logic:

The system implements two switches to do the following:

Pressing SW$1$ start LED$1$ toggling $($blinking$)$ every $5\mathrm{.}0s.$ The LED$1$

continues to toggle even after SW$1$ is released

Each time SW$2$ is pressed and released the toggling rate of LED$1$

reduces by $1\mathrm{.}0s.$ The blinking rate should not go below $1\mathrm{.}0s$

The state of the switches are sampled at the blinking rate

Create a C program implementing the Software Logic on a STM$32$

NUCLEO$-$L$476$RG