I.MX6UL internal ADC - Revision history

SebastienSz at 09:52, 18 May 2017

2017-05-18T09:52:19Z

← Older revision		Revision as of 11:52, 18 May 2017
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	* Channel 4 is available on J21 pin 37 of [[OPOS6ULDev]] (AIN4/XPUL: muxed with touchscreen)		* Channel 4 is available on J21 pin 37 of [[OPOS6ULDev]] (AIN4/XPUL: muxed with touchscreen)
	* Channel 8 is available on J3 pin 12 of [[OPOS6ULDev]] (AIN8)		* Channel 8 is available on J3 pin 12 of [[OPOS6ULDev]] (AIN8)
	* Channel 9 is available on J3 pin 9 of [[OPOS6ULDev]] (AIN9)		* Channel 9 is available on J3 pin 7 of [[OPOS6ULDev]] (AIN9)

	== Driver ==		== Driver ==

SebastienSz: /* Introduction */ pin 12 and 9 are on J3

2017-04-25T14:47:43Z

Introduction: pin 12 and 9 are on J3

← Older revision		Revision as of 16:47, 25 April 2017
Line 11:		Line 11:
	* Channel 3 is available on J21 pin 39 of [[OPOS6ULDev]] (AIN3/XNUR: muxed with touchscreen)		* Channel 3 is available on J21 pin 39 of [[OPOS6ULDev]] (AIN3/XNUR: muxed with touchscreen)
	* Channel 4 is available on J21 pin 37 of [[OPOS6ULDev]] (AIN4/XPUL: muxed with touchscreen)		* Channel 4 is available on J21 pin 37 of [[OPOS6ULDev]] (AIN4/XPUL: muxed with touchscreen)
	* Channel 8 is available on ~~J21~~ pin 12 of [[OPOS6ULDev]] (AIN8)		* Channel 8 is available on J3 pin 12 of [[OPOS6ULDev]] (AIN8)
	* Channel 9 is available on ~~J21~~ pin 9 of [[OPOS6ULDev]] (AIN9)		* Channel 9 is available on J3 pin 9 of [[OPOS6ULDev]] (AIN9)

	== Driver ==		== Driver ==

JulienB: /* Links */

2017-03-27T14:07:03Z

Links

← Older revision		Revision as of 16:07, 27 March 2017
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	All values are not converted (ie. directly show the register content). To have the mV value, you must do: value_mV = read_value * 3300/4095		All values are not converted (ie. directly show the register content). To have the mV value, you must do: value_mV = read_value * 3300/4095

			==AsDevices==
			* You can access this device from your C/C++ application using ''as_adc_xxx_iio'' functions from [[AsDevices]]
			* ''target/demos/oscillo'' is a "good" example to start with...

	==Links==		==Links==

JulienB: /* Read channels value */

2017-03-27T14:04:04Z

Read channels value

← Older revision		Revision as of 16:04, 27 March 2017
Line 69:		Line 69:
	</pre>		</pre>

	All values are not converted (ie. directly show the register content). To have the mV value, you must ~~doi~~: value_mV = read_value * 3300/4095		All values are not converted (ie. directly show the register content). To have the mV value, you must do: value_mV = read_value * 3300/4095

	==Links==		==Links==

JulienB: /* Introduction */

2017-03-27T14:02:57Z

Introduction

← Older revision		Revision as of 16:02, 27 March 2017
Line 11:		Line 11:
	* Channel 3 is available on J21 pin 39 of [[OPOS6ULDev]] (AIN3/XNUR: muxed with touchscreen)		* Channel 3 is available on J21 pin 39 of [[OPOS6ULDev]] (AIN3/XNUR: muxed with touchscreen)
	* Channel 4 is available on J21 pin 37 of [[OPOS6ULDev]] (AIN4/XPUL: muxed with touchscreen)		* Channel 4 is available on J21 pin 37 of [[OPOS6ULDev]] (AIN4/XPUL: muxed with touchscreen)
			* Channel 8 is available on J21 pin 12 of [[OPOS6ULDev]] (AIN8)
			* Channel 9 is available on J21 pin 9 of [[OPOS6ULDev]] (AIN9)

	== Driver ==		== Driver ==

JulienB: /* Read channels value */

2016-12-19T17:26:03Z

Read channels value

← Older revision		Revision as of 19:26, 19 December 2016
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	# cd /sys/bus/iio/devices/iio:device0		# cd /sys/bus/iio/devices/iio:device0
	# ls		# ls
	buffer in_voltage11_raw ~~in_voltage2_raw~~ name		buffer in_voltage5_raw
	~~dev~~ in_voltage12_raw ~~in_voltage3_raw~~ power		current_timestamp_clock in_voltage6_raw
	~~in_temp8_raw in_voltage13_raw in_voltage4_raw~~ scan_elements		dev in_voltage7_raw
	~~in_temp9_raw in_voltage14_raw in_voltage5_raw~~ subsystem		in_conversion_mode in_voltage8_raw
	~~in_voltage0_raw in_voltage15_raw in_voltage6_raw~~ trigger		in_temp_input in_voltage9_raw
	~~in_voltage10_raw in_voltage1_raw in_voltage7_raw~~ uevent		in_voltage0_raw in_voltage_sampling_frequency
			in_voltage10_raw in_voltage_scale
			in_voltage11_raw name
			in_voltage12_raw of_node
			in_voltage13_raw power
			in_voltage14_raw sampling_frequency_available
			in_voltage15_raw scan_elements
			in_voltage1_raw subsystem
			in_voltage2_raw trigger
			in_voltage3_raw uevent
			in_voltage4_raw
	</pre>		</pre>

	To read ADC value just «cat» the corresponding input file:		To read ADC value just «cat» the corresponding input file:
	<pre class="apf">		<pre class="apf">
	# cat ~~in_voltage0_raw~~ for channel 0		# cat in_voltage1_raw for channel 1 (ADC1_IN1)
	4095		4095
	</pre>		</pre>

	All values are not converted (ie. directly show the register content). To have the mV value, you must doi: value_mV = read_value * ~~1850~~/4095		All values are not converted (ie. directly show the register content). To have the mV value, you must doi: value_mV = read_value * 3300/4095

	==Links==		==Links==

JulienB: /* Introduction */

2016-12-19T17:24:24Z

Introduction

← Older revision		Revision as of 19:24, 19 December 2016
Line 1:		Line 1:
	== Introduction ==		== Introduction ==

	This description uses Linux kernel > 3.7.		This description uses Linux kernel >= 4.8.

	i.MX6UL (processor of [[OPOS6UL]] has an integrated 12 bits 16 channels Analog to Digital Converter.		i.MX6UL (processor of [[OPOS6UL]] has an integrated 12 bits 16 channels Analog to Digital Converter.
Line 7:		Line 7:
	Only channels 0-6 may be used to generic conversions and channels 2, 3, 4, 5 are used for the touchscreen on [[OPOS6ULDev]].		Only channels 0-6 may be used to generic conversions and channels 2, 3, 4, 5 are used for the touchscreen on [[OPOS6ULDev]].

	* Channel 0 is available on ~~J10~~ pin 38 of [[~~APF28Dev~~]]		* Channel 1 is available on J21 pin 40 of [[OPOS6ULDev]] (AIN1/YNLR: muxed with touchscreen)
	* Channel 1 is available on ~~J10~~ pin 36 of [[~~APF28Dev~~]]		* Channel 2 is available on J21 pin 38 of [[OPOS6ULDev]] (AIN2/YPLL: muxed with touchscreen)
	* Channel 6 is available on ~~J10~~ pin 35 of [[~~APF28Dev~~]]		* Channel 3 is available on J21 pin 39 of [[OPOS6ULDev]] (AIN3/XNUR: muxed with touchscreen)
			* Channel 4 is available on J21 pin 37 of [[OPOS6ULDev]] (AIN4/XPUL: muxed with touchscreen)

	== Driver ==		== Driver ==

JulienB: Created page with "== Introduction == This description uses Linux kernel > 3.7. i.MX6UL (processor of OPOS6UL has an integrated 12 bits 16 channels Analog to Digital Converter. Only chann..."

2016-12-19T16:06:36Z

Created page with "== Introduction == This description uses Linux kernel > 3.7. i.MX6UL (processor of OPOS6UL has an integrated 12 bits 16 channels Analog to Digital Converter. Only chann..."

New page

== Introduction ==

This description uses Linux kernel > 3.7.

i.MX6UL (processor of [[OPOS6UL]] has an integrated 12 bits 16 channels Analog to Digital Converter.

Only channels 0-6 may be used to generic conversions and channels 2, 3, 4, 5 are used for the touchscreen on [[OPOS6ULDev]].

* Channel 0 is available on J10 pin 38 of [[APF28Dev]]
* Channel 1 is available on J10 pin 36 of [[APF28Dev]]
* Channel 6 is available on J10 pin 35 of [[APF28Dev]]

== Driver ==
Driver is by default included if you choose an [[OPOS6UL]] as target.

Otherwise, you can select it that way:

<pre class="host">
[ ] $ make linux-menuconfig
</pre>

<pre class="config">
Device Drivers --->
...
<*> Industrial I/O support --->
...
Analog to digital converters
...
<*> Freescale vf610 ADC driver
</pre>

Then compile the distribution :
<pre class="host">
[ ] $ make linux && make
</pre>

== Use it ==

=== Read channels value ===

<pre class="apf">
# cd /sys/bus/iio/devices/iio:device0
# ls
buffer in_voltage11_raw in_voltage2_raw name
dev in_voltage12_raw in_voltage3_raw power
in_temp8_raw in_voltage13_raw in_voltage4_raw scan_elements
in_temp9_raw in_voltage14_raw in_voltage5_raw subsystem
in_voltage0_raw in_voltage15_raw in_voltage6_raw trigger
in_voltage10_raw in_voltage1_raw in_voltage7_raw uevent
</pre>

To read ADC value just «cat» the corresponding input file:
<pre class="apf">
# cat in_voltage0_raw for channel 0
4095
</pre>

All values are not converted (ie. directly show the register content). To have the mV value, you must doi: value_mV = read_value * 1850/4095

==Links==
* http://www.at91.com/linux4sam/bin/view/Linux4SAM/IioAdcDriver

[[Category:Linux drivers]]
[[Category:Analog to Digital Converter]]
[[Category:Industrial Input Output]]