Implementation of ADAS1000 Driver. More...

#include <stdlib.h>
#include "no_os_error.h"
#include "adas1000.h"
#include "no_os_crc.h"
#include "no_os_alloc.h"

Include dependency graph for adas1000.c:

Functions
int32_t	adas1000_compute_spi_freq (struct adas1000_init_param init_param, uint32_t spi_freq)
	Preliminary function which computes the spi frequency based on the frame rate value passed input parameter. More...

int32_t	adas1000_init (struct adas1000_dev *device, const struct adas1000_init_param init_param)
	Initializes the SPI communication with ADAS1000. The ADAS1000 is configured with the specified frame rate and all the words in a frame are activated. More...

int32_t	adas1000_read (struct adas1000_dev device, uint8_t reg_addr, uint32_t reg_data)
	Read device register. More...

int32_t	adas1000_write (struct adas1000_dev *device, uint8_t reg_addr, uint32_t reg_data)
	Write device register. More...

int32_t	adas1000_soft_reset (struct adas1000_dev *device)
	Software reset of the device. More...

int32_t	adas1000_compute_frame_size (struct adas1000_dev *device)
	Compute frame size. More...

int32_t	adas1000_set_inactive_framewords (struct adas1000_dev *device, uint32_t words_mask)
	Selects which words are not included in a data frame. More...

int32_t	adas1000_set_frame_rate (struct adas1000_dev *device, uint32_t rate)
	Sets the frame rate. More...

int32_t	adas1000_read_data (struct adas1000_dev device, uint8_t data_buff, uint32_t frame_cnt, struct read_param *read_data_param)
	Reads the specified number of frames. More...

uint32_t	adas1000_compute_frame_crc (struct adas1000_dev device, uint8_t buff)
	Computes the CRC for a frame. More...

Detailed Description

Implementation of ADAS1000 Driver.

Author: ACozma (andre.nosp@m.i.co.nosp@m.zma@a.nosp@m.nalo.nosp@m.g.com); Antoniu Miclaus (anton.nosp@m.iu.m.nosp@m.iclau.nosp@m.s@an.nosp@m.alog..nosp@m.com)

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

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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.
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.

Function Documentation

◆ adas1000_compute_frame_crc()

uint32_t adas1000_compute_frame_crc	(	struct adas1000_dev *	device,
		uint8_t *	buff
	)

Computes the CRC for a frame.

Parameters

device	- Device structure.
buff	- Buffer holding the frame data.

Returns: Returns the CRC value for the given frame.

Select the CRC poly and word size based on the frame rate.

◆ adas1000_compute_frame_size()

int32_t adas1000_compute_frame_size ( struct adas1000_dev * device )

Compute frame size.

Parameters

device - The device structure.

Returns: 0 in case of success, negative error code otherwise.

ADAS1000_2KHZ__FRAME_RATE

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◆ adas1000_compute_spi_freq()

int32_t adas1000_compute_spi_freq	(	struct adas1000_init_param *	init_param,
		uint32_t *	spi_freq
	)

Preliminary function which computes the spi frequency based on the frame rate value passed input parameter.

Parameters

init_param	- ADAS1000 initialization parameters.
spi_freq	- SPI frequency to be computed.

Returns: 0 in case of success, negative error code otherwise.

Compute the SPI clock frequency.

ADAS1000_2KHZ__FRAME_RATE

◆ adas1000_init()

int32_t adas1000_init	(	struct adas1000_dev **	device,
		const struct adas1000_init_param *	init_param
	)

Initializes the SPI communication with ADAS1000. The ADAS1000 is configured with the specified frame rate and all the words in a frame are activated.

Parameters

device	- the device structure.
init_param	- the initialization parameters.

Returns: 0 in case of success, negative error code otherwise.

store the selected frame rate

Initialize the SPI controller.

Reset the ADAS1000.

Activate all the channels

Set the frame rate

◆ adas1000_read()

int32_t adas1000_read	(	struct adas1000_dev *	device,
		uint8_t	reg_addr,
		uint32_t *	reg_data
	)

Read device register.

Parameters

device	- The device structure.
reg_addr	- The register address.
reg_data	- The data read from the register.

Returns: 0 in case of success, negative error code otherwise.

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◆ adas1000_read_data()

int32_t adas1000_read_data	(	struct adas1000_dev *	device,
		uint8_t *	data_buff,
		uint32_t	frame_cnt,
		struct read_param *	read_data_param
	)

Reads the specified number of frames.

Parameters

device	- Device structure.
data_buff	- Buffer to store the read data.
frame_cnt	- Number of frames to read.
read_data_param	- Structure holding the parameters required for frame read sequence

Returns: 0 in case of success, negative error code otherwise.

If the read sequence must be started send a FRAMES command.

Read the number of requested frames.

If waiting for the READY bit to be set read the header until the bit is set, otherwise just read the entire frame.

if the header is repeated until the READY bit is set read only the header, otherwise read the entire frame.

If the frames read sequence must be stopped read a register to stop the frames read.

◆ adas1000_set_frame_rate()

int32_t adas1000_set_frame_rate	(	struct adas1000_dev *	device,
		uint32_t	rate
	)

Sets the frame rate.

Parameters

device	- The device structure.
rate	- ADAS1000 frame rate.

Returns: 0 in case of success, negative error code otherwise.

Store the selected frame rate

Read the current value of the Frame Control Register

Compute new frame size and update the Frame Control Register value

ADAS1000_2KHZ__FRAME_RATE

Write the new Frame control Register value

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◆ adas1000_set_inactive_framewords()

int32_t adas1000_set_inactive_framewords	(	struct adas1000_dev *	device,
		uint32_t	words_mask
	)

Selects which words are not included in a data frame.

Parameters

device	- The device structure.
words_mask	- Specifies the words to be excluded from the data frame using a bitwise or of the corresponding bits from the Frame Control Register.

Returns: 0 in case of success, negative error code otherwise.

Read the current value of the Frame Control Register

set the inactive channles

Write the new value to the Frame Control register.

compute the number of inactive words

compute the new frame size

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◆ adas1000_soft_reset()

int32_t adas1000_soft_reset ( struct adas1000_dev * device )

Software reset of the device.

Parameters

device - The device structure.

Returns: 0 in case of success, negative error code otherwise.

Clear all registers to their reset value.

The software reset requires a NOP command to complete the reset.

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◆ adas1000_write()

int32_t adas1000_write	(	struct adas1000_dev *	device,
		uint8_t	reg_addr,
		uint32_t	reg_data
	)

Write device register.

Parameters

device	- The device structure.
reg_addr	- The register address.
reg_data	- The data to be written.

Returns: 0 in case of success, negative error code otherwise.

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Functions

Detailed Description

Function Documentation

◆ adas1000_compute_frame_crc()

◆ adas1000_compute_frame_size()

◆ adas1000_compute_spi_freq()

◆ adas1000_init()

◆ adas1000_read()

◆ adas1000_read_data()

◆ adas1000_set_frame_rate()

◆ adas1000_set_inactive_framewords()

◆ adas1000_soft_reset()

◆ adas1000_write()