ADC driver. More...

#include "mcu_periph/adc.h"
#include "mcu_periph/gpio.h"
#include "hal.h"
#include "std.h"
#include "mcu_periph/ram_arch.h"

Include dependency graph for adc_arch.c:

Go to the source code of this file.

Macros
#define	USE_AD1 1

#define	ADC_SAMPLE_RATE ADC_SAMPLE_480
	endif

#define	ADC_BUF_DEPTH (MAX_AV_NB_SAMPLE/2)

Functions
static	IN_DMA_SECTION (adcsample_t adc_samples[ADC_NUM_CHANNELS *MAX_AV_NB_SAMPLE])

static void	adc_configure (ADCConversionGroup *cfg, uint8_t num_channels, const uint8_t channels[], uint32_t sample_rate, adccallback_t end_cb, adcerrorcallback_t error_cb)
	Configure the ADC conversion group depending on the architecture.

void	adc1callback (ADCDriver *adcp)
	Adc1 callback.

static void	adcerrorcallback (ADCDriver *adcp, adcerror_t err)
	Adc error callback.

void	adc_buf_channel (uint8_t adc_channel, struct adc_buf *s, uint8_t av_nb_sample)
	Link between ChibiOS ADC drivers and Paparazzi adc_buffers.

void	adc_init (void)
	Adc init.

Variables
static const uint8_t	adc_channel_map [ADC_NUM_CHANNELS]

uint8_t	adc_error_flag = 0

ADCDriver *	adcp_err = NULL

Detailed Description

ADC driver.

ADC defines for Lia board (STM32F105) 5 Channels: 1 - ADC1, Channel 13 2 - ADC2, Channel 10 3 - ADC3, Channel 11 4 - ADC4, Channel 14 5 - Temperature sensor, Channel 16

Default buffer depth is equal to MAX_AV_NB_SAMPLE This allows us to always have more or equal samples than the user requires

Note: : With ChibiOS/RT 2.6.2 and STM32F105 chip the channels have to be interleaved, otherwise the current measurement is affected by the previous channel measured. Most likely bug on ChibiOS ADC driver for this particular chip.

For 5 actual channels we have to define (DUMMY stants for 1 dummy channel): CH1 + DUMMY + CH2 + DUMMY + CH3 + DUMMY + CH4 + DUMMY + CH_TEMP = 9 channels Then only every second channel is really read. Might be fixed in next version of ChibiOS

V_ref is 3.3V, ADC has 12bit or 16bit resolution.

Definition in file adc_arch.c.

Macro Definition Documentation

◆ ADC_BUF_DEPTH

#define ADC_BUF_DEPTH (MAX_AV_NB_SAMPLE/2)

Definition at line 138 of file adc_arch.c.

◆ ADC_SAMPLE_RATE

#define ADC_SAMPLE_RATE ADC_SAMPLE_480

endif

Definition at line 76 of file adc_arch.c.

◆ USE_AD1

#define USE_AD1 1

Definition at line 64 of file adc_arch.c.

Function Documentation

◆ adc1callback()

void adc1callback ( ADCDriver * adcp )

Adc1 callback.

Callback, fired after half of the buffer is filled (i.e. half of the samples is collected). Since we are assuming continuous ADC conversion, the ADC state is never equal to ADC_COMPLETE.

Note: Averaging is done when the modules ask for ADC values

Parameters

[in]	adcp	pointer to a `ADCDriver` object
[in]	buffer	pointer to a `buffer` with samples
[in]	n	number of samples

Definition at line 243 of file adc_arch.c.

References ADC_BUF_DEPTH, ADC_NUM_CHANNELS, and foo.

Referenced by adc_init().

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◆ adc_buf_channel()

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

Link between ChibiOS ADC drivers and Paparazzi adc_buffers.

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

struct adc_buf channel_buf;

adc_buf_channel(1, &channel_buf, 12);

adc_buf

Generic interface for all ADC hardware drivers, independent from microcontroller architecture.

Definition adc.h:53

adc_buf_channel

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

Link between ChibiOS ADC drivers and Paparazzi adc_buffers.

Definition adc_arch.c:312

foo

uint16_t foo

Definition main_demo5.c:58

Registers channel_buf as buffer for ADC channel 1, with max index 12 (12 samples).

Definition at line 312 of file adc_arch.c.

References ADC_NUM_CHANNELS, foo, MAX_AV_NB_SAMPLE, and s.

Referenced by adc_generic_init(), airspeed_adc_init(), aoa_adc_init(), electrical_init(), glide_wing_lock_init(), humid_hih_init(), light_solar_init(), light_temt_init(), mf_ptu_init(), sonar_adc_init(), temp_adc_init(), temp_tcouple_adc_init(), and wing_rotation_adc_init().

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◆ adc_configure()

static void adc_configure	(	ADCConversionGroup *	cfg,
		uint8_t	num_channels,
		const uint8_t	channels[],
		uint32_t	sample_rate,
		adccallback_t	end_cb,
		adcerrorcallback_t	error_cb
	)

static

Configure the ADC conversion group depending on the architecture.

Parameters

cfg	The configuration to be set
num_channels	The number of channels in the ADC
channels	The channel mapping to real channels
sample_rate	The sample rate for all channels
end_cb	The callback function at the end of conversion
error_cb	The callback function whenever an error occurs