Embedded Programming with Modern C++ Cookbook

How to do it...

We will create an application that displays text on a 1602 LCD display attached to our Raspberry Pi board:

1. In your ~/test working directory, create a subdirectory called i2c.
2. Use your favorite text editor to create an i2c.cpp file in the i2c subdirectory.
3. Put the following include directives and constants' definitions into the i2c.cpp file:

#include <thread>#include <system_error>#include <unistd.h>#include <fcntl.h>#include <errno.h>#include <sys/ioctl.h>#include <linux/i2c-dev.h>using namespace std::literals::chrono_literals;enum class Function : uint8_t {  clear = 0x01,  home = 0x02,  entry_mode_set = 0x04,  display_control = 0x08,  cursor_shift = 0x10,  fn_set = 0x20,  set_ddram_addr = 0x80};constexpr int En = 0b00000100;