samples: FT800 demo application

# SPDX-License-Identifier: Apache-2.0

cmake_minimum_required(VERSION 3.13.1)

find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})

project(ft800)

target_sources(app PRIVATE src/main.c)

.. _display-ft800-sample:

FT800

#####

Overview

********

This sample displays a hello message and an incrementing counter using FT800

Embedded Video Engine.

Requirements

************

To use this sample, the following hardware is required:

* A board with SPI support

* Display with `FT800 EVE`_ like `VM800C board`_

Wiring

******

You will need to connect the `FT800 EVE`_ SPI interface onto a board that

supports Arduino shields.

Building and Running

********************

This sample should work on any board that has SPI enabled and has an Arduino

shield interface. For example, it can be run on the nRF52840-DK board as

described below:

.. zephyr-app-commands::

   :zephyr-app: samples/drivers/misc/ft800

   :board: nrf52840dk_nrf52840

   :goals: flash

   :compact:

To build the sample for `VM800C board`_ the shild must be defined as described

below:

.. zephyr-app-commands::

   :zephyr-app: samples/drivers/misc/ft800

   :board: nrf52840dk_nrf52840

   :shield: ftdi_vm800c

   :goals: flash

   :compact:

.. _VM800C board: https://www.ftdichip.com/Products/Modules/VM800C.html

.. _FT800 EVE: https://www.ftdichip.com/Products/ICs/FT800.html

CONFIG_SPI=y

CONFIG_FT800=y

sample:

  name: FT800 display sample

tests:

  sample.display.ft800:

    tags: drivers

    depends_on: spi

    platform_allow: nrf52840dk_nrf52840

    extra_args: SHIELD=ftdi_vm800c

/*

 * Copyright (c) 2021 Hubert Miś <hubert.mis@gmail.com>

 *

 * SPDX-License-Identifier: Apache-2.0

 */

#include <zephyr.h>

#include <drivers/misc/ft8xx/ft8xx.h>

#include <drivers/misc/ft8xx/ft8xx_copro.h>

#include <drivers/misc/ft8xx/ft8xx_dl.h>

/**

 * @file Display a counter using FT800.

 */

/* sleep time in msec */

#define SLEEPTIME  100

/* touch tags */

#define TAG_PLUS 1

#define TAG_MINUS 2

static volatile bool process_touch;

static void touch_irq(void)

{

	process_touch = true;

}

void main(void)

{

	int cnt;

	int val;

	struct ft8xx_touch_transform tt;

	/* To get touch events calibrate the display */

	ft8xx_calibrate(&tt);

	/* Get interrupts on touch event */

	ft8xx_register_int(touch_irq);

	/* Starting counting */

	val = 0;

	cnt = 0;

	while (1) {

		/* Start Display List */

		ft8xx_copro_cmd_dlstart();

		ft8xx_copro_cmd(FT8XX_CLEAR_COLOR_RGB(0x00, 0x00, 0x00));

		ft8xx_copro_cmd(FT8XX_CLEAR(1, 1, 1));

		/* Set color */

		ft8xx_copro_cmd(FT8XX_COLOR_RGB(0xf0, 0xf0, 0xf0));

		/* Display the counter */

		ft8xx_copro_cmd_number(20, 20, 29, FT8XX_OPT_SIGNED, cnt);

		cnt++;

		/* Display the hello message */

		ft8xx_copro_cmd_text(20, 70, 30, 0, "Hello,");

		/* Set Zephyr color */

		ft8xx_copro_cmd(FT8XX_COLOR_RGB(0x78, 0x29, 0xd2));

		ft8xx_copro_cmd_text(20, 105, 30, 0, "Zephyr!");

		/* Display value set with buttons */

		ft8xx_copro_cmd(FT8XX_COLOR_RGB(0xff, 0xff, 0xff));

		ft8xx_copro_cmd_number(80, 170, 29,

					FT8XX_OPT_SIGNED | FT8XX_OPT_RIGHTX,

					val);

		ft8xx_copro_cmd(FT8XX_TAG(TAG_PLUS));

		ft8xx_copro_cmd_text(90, 160, 31, 0, "+");

		ft8xx_copro_cmd(FT8XX_TAG(TAG_MINUS));

		ft8xx_copro_cmd_text(20, 160, 31, 0, "-");

		/* Finish Display List */

		ft8xx_copro_cmd(FT8XX_DISPLAY());

		/* Display created frame */

		ft8xx_copro_cmd_swap();

		if (process_touch) {

			int tag = ft8xx_get_touch_tag();

			if (tag == TAG_PLUS) {

				val++;

			} else if (tag == TAG_MINUS) {

				val--;

			}

			process_touch = false;

		}

		/* Wait a while */

		k_msleep(SLEEPTIME);

	}

}