pico_spi.c File Reference

Implementation of pico spi driver. More...

#include "no_os_error.h"
#include "no_os_util.h"
#include "no_os_spi.h"
#include "no_os_alloc.h"
#include "pico_spi.h"
#include "pico/stdlib.h"
#include "no_os_delay.h"
#include "hardware/resets.h"

Include dependency graph for pico_spi.c:

Macros
#define	PICO_SPI_MAX_INSTANCES   2U

Functions
int32_t	pico_spi_init (struct no_os_spi_desc **desc, const struct no_os_spi_init_param *param)
	Initialize the SPI communication peripheral.
int32_t	pico_spi_remove (struct no_os_spi_desc *desc)
	Free the resources allocated by no_os_spi_init().
int32_t	pico_spi_transfer (struct no_os_spi_desc *desc, struct no_os_spi_msg *msgs, uint32_t len)
	Write/read multiple messages to/from SPI.
int32_t	pico_spi_write_and_read (struct no_os_spi_desc *desc, uint8_t *data, uint16_t bytes_number)
	Write and read data to/from SPI.

Variables
const struct no_os_spi_platform_ops	pico_spi_ops
	pico platform specific SPI platform ops structure

Detailed Description

Implementation of pico spi driver.

Author

RBolboac (ramon.nosp@m.a.bo.nosp@m.lboac.nosp@m.a@an.nosp@m.alog..nosp@m.com)

Copyright 2022(c) Analog Devices, Inc.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
3. Neither the name of Analog Devices, Inc. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES, INC. “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANALOG DEVICES, INC. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Macro Definition Documentation

PICO_SPI_MAX_INSTANCES

#define PICO_SPI_MAX_INSTANCES   2U

Function Documentation

pico_spi_init()

int32_t pico_spi_init	(	struct no_os_spi_desc **	desc,
		const struct no_os_spi_init_param *	param )

Initialize the SPI communication peripheral.

Parameters

desc	- The SPI descriptor.
param	- The structure that contains the SPI parameters.

Returns

0 in case of success, error code otherwise.

pico_spi_remove()

int32_t pico_spi_remove

(

struct no_os_spi_desc *

desc

)

Free the resources allocated by no_os_spi_init().

Parameters

desc	- The SPI descriptor.

Returns

0 in case of success, error code otherwise.

pico_spi_transfer()

int32_t pico_spi_transfer	(	struct no_os_spi_desc *	desc,
		struct no_os_spi_msg *	msgs,
		uint32_t	len )

Write/read multiple messages to/from SPI.

Parameters

desc	- The SPI descriptor.
msgs	- The messages array.
len	- Number of messages.

Returns

0 in case of success, errno codes otherwise.

Here is the caller graph for this function:

pico_spi_write_and_read()

int32_t pico_spi_write_and_read	(	struct no_os_spi_desc *	desc,
		uint8_t *	data,
		uint16_t	bytes_number )

Write and read data to/from SPI.

Parameters

desc	- The SPI descriptor.
data	- The buffer with the transmitted/received data.
bytes_number	- Number of bytes to write/read.

Returns

0 in case of success, error code otherwise.

Variable Documentation

pico_spi_ops

const struct no_os_spi_platform_ops pico_spi_ops

Initial value:

= {
    .init = &pico_spi_init,
    .write_and_read = &pico_spi_write_and_read,
    .transfer = &pico_spi_transfer,
    .remove = &pico_spi_remove
}

pico platform specific SPI platform ops structure

pico specific SPI platform ops structure