Developing the timer driver

In this section, we will apply the knowledge gained about the TIM peripheral to develop a driver for generating delays.

First, create a copy of your previous project in your IDE, following the steps outlined in earlier chapters. Rename this copied project GTIM. Next, create a new file named tim.c in the Src folder and another file named tim.h in the Inc folder.

Our goal is to develop a driver that initializes TIM2 to generate a 1 Hz timeout. Populate your tim.c file with the following code:

#include "tim.h"
#define TIM2EN        (1U<<0)
#define CR1_CEN        (1U<<0)
void tim2_1hz_init(void)
{
    /*Enable clock access to tim2*/
    RCC->APB1ENR |=TIM2EN;
    /*Set prescaler value*/
    TIM2->PSC =  1600 - 1 ;
    /*Set auto-reload...