boards: shields: lmp90100_evb: add TI LMP90100 EVB shield

# Copyright (c) 2019 Vestas Wind Systems A/S

# SPDX-License-Identifier: Apache-2.0

if SHIELD_LMP90100_EVB

if ADC

config SPI

	default y

config ADC_LMP90XXX

	default y

config ADC_LMP90XXX_GPIO

	default y

endif # ADC

if EEPROM

config I2C

	default y

config EEPROM_AT24

	default y

endif # EEPROM

endif # SHIELD_LMP90100_EVB

# Copyright (c) 2019 Vestas Wind Systems A/S

# SPDX-License-Identifier: Apache-2.0

config SHIELD_LMP90100_EVB

	def_bool $(shields_list_contains,lmp90100_evb)

.. _lmp90100_evb_shield:

LMP90100 Sensor AFE Evaluation Board

####################################

Overview

********

The Texas Instruments LMP90100 Sensor AFE Evaluation Board (EVB) is a

development kit for the TI LMP90xxx series of analog sensor frontends.

.. figure:: ./lmp90100eb_lmp90100eb.jpg

   :width: 640px

   :align: center

   :alt: LMP90100 EVB

   LMP90100 EVB (Credit: Texas Instruments)

Requirements

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

This shield can only be used with a development board that provides a

configuration for Arduino connectors and defines a node alias for the

SPI interface (see :ref:`shields` for more details).

The SPIO connector pins on the LMP90100 EVB can be connected to the

Arduino headers of the development board using jumper wires.

For more information about interfacing the LMP90xxx series and the

LMP90100 EVB in particular, see these TI documents:

- `LMP90100 Sensor AFE Evaluation Board User's Guide`_

- `LMP90100 Multi-Channel, Low Power 24-Bit Sensor AFE`_

Samples

*******

Zephyr RTOS includes one sample targeting the LMP90100 EVB:

* :ref:`lmp90100_evb_rtd_sample`

Programming

***********

Set ``-DSHIELD=lmp90100_evb`` when you invoke ``west build``. For example:

.. zephyr-app-commands::

   :zephyr-app: samples/shields/lmp90100_evb/thermocouple

   :board: frdm_k64f

   :shield: lmp90100_evb

   :goals: build

.. _LMP90100 Sensor AFE Evaluation Board User's Guide:

   http://www.ti.com/lit/pdf/snau028

.. _LMP90100 Multi-Channel, Low Power 24-Bit Sensor AFE:

   http://www.ti.com/product/LMP90100

/*

 * Copyright (c) 2019 Vestas Wind Systems A/S

 *

 * SPDX-License-Identifier: Apache-2.0

 */

&arduino_spi {

	status = "okay";

	lmp90100: lmp90100@0 {

		compatible = "ti,lmp90100";

		reg = <0x0>;

		spi-max-frequency = <1000000>;

		label = "LMP90100";

		/* Uncomment to use IRQ instead of polling: */

		/* drdyb-gpios = <&arduino_header 15 GPIO_INT_ACTIVE_LOW>; */

		#io-channel-cells = <2>;

		gpio {

			compatible = "ti,lmp90xxx-gpio";

			gpio-controller;

			label = "LMP90100_GPIO";

			#gpio-cells = <2>;

		};

	};

};

&arduino_i2c {

	status = "okay";

	eeprom0: eeprom@57 {

		compatible = "atmel,at24";

		reg = <0x57>;

		label = "EEPROM_LMP90100_EVB";

		size = <256>;

		pagesize = <8>;

		address-width = <8>;

		timeout = <5>;

	};

};