ad7780.c File Reference

Implementation of AD7780 Driver. More...

#include <stdlib.h>
#include "ad7780.h"
#include "no_os_alloc.h"
#include "no_os_error.h"

Include dependency graph for ad7780.c:

Functions
int8_t	ad7780_init (struct ad7780_dev **device, struct ad7780_init_param init_param)
	Initializes the communication peripheral and the initial Values for AD7780 Board and checks if the device is present.
int32_t	ad7780_remove (struct ad7780_dev *dev)
	Free the resources allocated by ad7780_init().
int8_t	ad7780_wait_rdy_go_low (struct ad7780_dev *dev)
	Waits for DOUT/RDY pin to go low.
int32_t	ad7780_read_sample (struct ad7780_dev *dev, uint8_t *p_status)
	Reads a 24-bit sample from the ADC.
float	ad7780_convert_to_voltage (uint32_t raw_sample, float v_ref, uint8_t gain)
	Converts the 24-bit raw value to milivolts.

Detailed Description

Implementation of AD7780 Driver.

Author

DNechita (dan.n.nosp@m.echi.nosp@m.ta@an.nosp@m.alog.nosp@m..com)

Copyright 2012(c) Analog Devices, Inc.

SPDX-License-Identifier: BSD-3-Clause

Function Documentation

ad7780_convert_to_voltage()

float ad7780_convert_to_voltage	(	uint32_t	raw_sample,
		float	v_ref,
		uint8_t	gain )

Converts the 24-bit raw value to milivolts.

Parameters

raw_sample	- 24-bit raw sample(offset binary).
v_ref	- The reference voltage.
gain	- The gain. Accepted values: 1, 128.

Returns

voltage - The voltage obtained from the raw value.

ad7780_init()

int8_t ad7780_init	(	struct ad7780_dev **	device,
		struct ad7780_init_param	init_param )

Initializes the communication peripheral and the initial Values for AD7780 Board and checks if the device is present.

Parameters

device	- The device structure.
init_param	- The structure that contains the device initial parameters.

Returns

ret - The result of the initialization procedure. Example: -1 - SPI peripheral was not initialized or the device is not present. 0 - SPI peripheral was initialized and the device is present.

ad7780_read_sample()

int32_t ad7780_read_sample	(	struct ad7780_dev *	dev,
		uint8_t *	p_status )

Reads a 24-bit sample from the ADC.

Parameters

dev	- The device structure.
p_status	- Stores the 8-bit status that is read for every conversion.

Returns

convSample - The 24-bit sample.

ad7780_remove()

int32_t ad7780_remove

(

struct ad7780_dev *

dev

)

Free the resources allocated by ad7780_init().

Parameters

dev	- The device structure.

Returns

0 in case of success, negative error code otherwise.

ad7780_wait_rdy_go_low()

int8_t ad7780_wait_rdy_go_low

(

struct ad7780_dev *

dev

)

Waits for DOUT/RDY pin to go low.

Parameters

dev	- The device structure.

Returns

The result of the operation. Example: -1 - DOUT/RDY pin is high. 0 - DOUT/RDY pin is low.