This repository contains and example Hardware Abstraction Layer (HAL) for Littlev Graphics Library. The graphics library uses the functions in these files to access to your:

• Display
• Touch pad
• System tick

In the HAL you have to write only 5 simple functions.

To access to the display 2 functions are used:

disp_fill(x1, y1, x2, y2, color)Fill a rectangular area with a color

disp_map(x1, y1, x2, y2, color_array)Copy an array of colors to a rectangular area

You can use multiple input devices for example a touch pad and some buttons which are pressing specific points on the display

indev_get(id, *x, *y) Read the x and y coordinates from an input device. Return false if the input device released, true is pressed.

In indev.h you have to define INDEV_NUM according to the number of input devices. For example if you are using only a touch pad: #define INDEV_NUM 1

You have to provide possibility to get a system tick counter with 1 ms resolution.

systick_get() Get the elapsed milliseconds since start up

The systick_elaps(prev_time) function is also required but is already have been written.

The systick_add_cb(func) and systick_rem_cb(func) are optional and are required only fro some specific components from the [Misc. Library] (https://github.com/littlevgl/misc)