adc_arch.c File Reference

Driver for the analog to digital converters in Linux based systems. More...

#include "mcu_periph/adc.h"
#include <BOARD_CONFIG>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <poll.h>

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Functions
static void	adc_dev_init (struct adc_t *adc)
	Initialize an ADC device. More...
static void	write_sysfs_int (uint8_t dev_id, char *filename, int val)
	Write an int to a sysfs file. More...
void	adc_init (void)
	Initialize the ADC. More...
void	adc_buf_channel (uint8_t adc_channel, struct adc_buf *s, uint8_t av_nb_sample)
	Registers a buffer to be used to store the specified converted channel Usage: More...
void	adc_enable (struct adc_t *adc, uint8_t value)
	Start or stop the ADC readings. More...
int	adc_read (struct adc_t *adc, uint16_t *buf, uint16_t size)
	Read the ADC buffer from the driver. More...

Detailed Description

Driver for the analog to digital converters in Linux based systems.

Definition in file adc_arch.c.

Function Documentation

void adc_buf_channel	(	uint8_t	adc_channel,
		struct adc_buf *	s,
		uint8_t	av_nb_sample
	)

Registers a buffer to be used to store the specified converted channel Usage:

Todo:

: fx a more general ADC

Definition at line 91 of file adc_arch.c.

static void adc_dev_init ( struct adc_t *  adc )

inlinestatic

Initialize an ADC device.

Parameters

[in]

*adc

The ADC device to initialize

Definition at line 148 of file adc_arch.c.

References adc_t::buf_length, adc_t::channels, adc_t::channels_cnt, adc_t::dev_id, and write_sysfs_int().

Referenced by adc_init().

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void adc_enable	(	struct adc_t *	adc,
		uint8_t	value
	)

Start or stop the ADC readings.

Parameters

[in]	*adc	The ADC to start the readings for
[in]	value	1 to enable and 0 to disable

Definition at line 101 of file adc_arch.c.

References adc_t::dev_id, and write_sysfs_int().

Referenced by sonar_bebop_read().

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void adc_init

(

void

)

Initialize the ADC.

Starts conversions.

Definition at line 78 of file adc_arch.c.

References adc_dev_init().

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int adc_read	(	struct adc_t *	adc,
		uint16_t *	buf,
		uint16_t	size
	)

Read the ADC buffer from the driver.

Parameters

[in]	*adc	The adc you want to read from
[out]	*buf	Output values
[in]	size	The amount of bytes you want to read

Definition at line 113 of file adc_arch.c.

References adc_t::dev_id, and fd.

Referenced by sonar_bebop_read().

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static void write_sysfs_int ( uint8_t  dev_id, char *  filename, int  val  )

static

Write an int to a sysfs file.

Parameters

[in]	dev_id	The device id
[in]	*filename	The file to write to
[in]	val	The value to write

Definition at line 169 of file adc_arch.c.

References fd.

Referenced by adc_dev_init(), and adc_enable().

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