Developing the I2C driver

Let’s develop the I2C driver. Create a copy of your previous project in your IDE and rename this copied project I2C. Next, create a new file named i2c.c in the Src folder and another file named i2c.h in the Inc folder.

The initialization function

Let’s populate the i2c.c file, starting with the macros and initialization function:

#include "stm32f4xx.h"
#define     GPIOBEN            (1U<<1)
#define     I2C1EN            (1U<<21)
#define     I2C_100KHZ            80
#define     SD_MODE_MAX_RISE_TIME    17
#define    CR1_PE            (1U&lt...