ADC max1027 - Revision history

FabienM at 16:03, 18 February 2011

2011-02-18T16:03:42Z

← Older revision		Revision as of 18:03, 18 February 2011
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	[[Category:ExternalDeviceControl]]		[[Category:ExternalDeviceControl]]
	[[Category:Linux drivers]]		[[Category:Linux drivers]]
			[[Category:Analog to Digital Converter]]

Salocin68 at 19:05, 1 August 2010

2010-08-01T19:05:27Z

← Older revision		Revision as of 21:05, 1 August 2010
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	* [http://datasheets.maxim-ic.com/en/ds/MAX1027-MAX1031.pdf MAX1027 datasheet on Maxim website]		* [http://datasheets.maxim-ic.com/en/ds/MAX1027-MAX1031.pdf MAX1027 datasheet on Maxim website]
	* [http://lxr.linux.no/linux+v2.6.23.1/Documentation/hwmon/sysfs-interface hwmon documentation]		* [http://lxr.linux.no/linux+v2.6.23.1/Documentation/hwmon/sysfs-interface hwmon documentation]

	~~{{LanguageBar\|ADC_max1027\|CAN_max1027\|Max1027}}~~

	[[Category:ExternalDeviceControl]]		[[Category:ExternalDeviceControl]]
	[[Category:Linux drivers]]		[[Category:Linux drivers]]

FabienM: /* Usage */

2010-03-09T08:57:55Z

Usage

← Older revision		Revision as of 10:57, 9 March 2010
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	# export ADC_SPI="spi1.0" (on APF9328)		# export ADC_SPI="spi1.0" (on APF9328)
	or		or
	# export ADC_SPI="spi0.0" (on ~~APF27~~)		# export ADC_SPI="spi0.0" (on APF27DevFull)
	</pre>		</pre>
	}}		}}

JulienB: /* Performances */

2009-11-23T10:43:32Z

Performances

← Older revision		Revision as of 12:43, 23 November 2009
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	{\| border="1" cellpadding="5" cellspacing="0" summary="MAX1027 Performances"		{\| border="1" cellpadding="5" cellspacing="0" summary="MAX1027 Performances"
	\|- style="background:#efefef;" align="center"		\|- style="background:#efefef;" align="center"
	! Use case !! System -> Driver !! SPI comm !! Acquisition time !! EOC IT handling <br>(depends on system load) !! SPI comm !! Driver -> System !! Total time / Max speed		! Use case <br> (APF27, SPI Clock ~4MHz) !! System -> Driver !! SPI comm !! Acquisition time !! EOC IT handling <br>(depends on system: speed, load) !! SPI comm !! Driver -> System !! Total time / Max speed
	\|- align="center"		\|- align="center"
	\| 1 channel acquisition through /sys/ (averaging) \|\| bgcolor="yellow"\| ??? \|\| bgcolor=#60FF00 \| 27uS \|\| bgcolor=#60FF00 \| 44uS \|\| bgcolor="orange" \| 100uS\|\| bgcolor=#60FF00\| 26uS \|\| bgcolor="yellow"\| ??? \|\|		\| 1 channel acquisition through /sys/ (SPI trigerred conv, no averaging) \|\| bgcolor="yellow"\| ??? \|\| bgcolor=#60FF00 \| 27uS \|\| bgcolor=#60FF00 \| 44uS \|\| bgcolor="orange" \| 100uS\|\| bgcolor=#60FF00\| 26uS \|\| bgcolor="yellow"\| ??? \|\|
	\|- align="center"		\|- align="center"
	\| 1 channel ~~+ Temp~~ acquisition through /sys/ (no averaging) \|\| bgcolor="yellow"\| ??? \|\| bgcolor=#60FF00 \| 25uS \|\| bgcolor=#60FF00 \| ~~90uS~~ \|\| bgcolor="orange" \| ~~114uS~~ \|\| bgcolor=#60FF00 \| ~~44uS~~ \|\| bgcolor="yellow"\|??? \|\|		\| 1 channel acquisition through /sys/ <br> (SPI trigerred conv, averaging = 8) \|\| bgcolor="yellow"\| ??? \|\| bgcolor=#60FF00 \| 25uS \|\| bgcolor=#60FF00 \| 78uS \|\| bgcolor="orange" \| 160uS\|\| bgcolor=#60FF00\| 30uS \|\| bgcolor="yellow"\| ??? \|\|
	\|- align="center"		\|- align="center"
	\| 1 channel + Temp acquisition through /sys/ \|\| bgcolor="yellow"\| ??? \|\| bgcolor=#60FF00 \| 25uS \|\| bgcolor=#60FF00 \| 90uS \|\| bgcolor="orange" \| 114uS \|\| bgcolor=#60FF00 \| 44uS \|\| bgcolor="yellow"\|??? \|\|		\| 1 channel acquisition through /sys/ <br> (SPI trigerred conv, averaging = 32) \|\| bgcolor="yellow"\| ??? \|\| bgcolor=#60FF00 \| 26uS \|\| bgcolor=#60FF00 \| 190uS \|\| bgcolor="orange" \| 140uS\|\| bgcolor=#60FF00\| 31uS \|\| bgcolor="yellow"\| ??? \|\|
			\|- align="center"
			\| 1 channel + Temp acquisition through /sys/ <br> (SPI trigerred conv, no averaging) \|\| bgcolor="yellow"\| ??? \|\| bgcolor=#60FF00 \| 25uS \|\| bgcolor=#60FF00 \| 90uS \|\| bgcolor="orange" \| 114uS \|\| bgcolor=#60FF00 \| 44uS \|\| bgcolor="yellow"\|??? \|\|
			\|- align="center"
			\| 1 channel + Temp acquisition through /sys/ <br> (SPI trigerred conv, averaging = 32) \|\| bgcolor="yellow"\| ??? \|\| bgcolor=#60FF00 \| 24uS \|\| bgcolor=#60FF00 \| 234uS \|\| bgcolor="orange" \| 136uS \|\| bgcolor=#60FF00 \| 48uS \|\| bgcolor="yellow"\|??? \|\|
	\|---		\|---
	\|}		\|}

JulienB: /* Performances */

2009-11-20T13:54:33Z

Performances

← Older revision		Revision as of 15:54, 20 November 2009
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	{\| border="1" cellpadding="5" cellspacing="0" summary="MAX1027 Performances"		{\| border="1" cellpadding="5" cellspacing="0" summary="MAX1027 Performances"
	\|- style="background:#efefef;" align="center"		\|- style="background:#efefef;" align="center"
	! Use case !! System -> Driver !! SPI comm !! Acquisition time !! EOC IT handling !! SPI comm !! Driver -> System !! Total time / Max speed		! Use case !! System -> Driver !! SPI comm !! Acquisition time !! EOC IT handling <br>(depends on system load) !! SPI comm !! Driver -> System !! Total time / Max speed
	\|- align="center"		\|- align="center"
	\| 1 channel acquisition through /sys/ (averaging) \|\| bgcolor="yellow"\| ??? \|\| bgcolor=#60FF00 \| 27uS \|\| bgcolor=#60FF00 \| 44uS \|\| bgcolor="orange" \| 100uS\|\| bgcolor=#60FF00\| 26uS \|\| bgcolor="yellow"\| ??? \|\|		\| 1 channel acquisition through /sys/ (averaging) \|\| bgcolor="yellow"\| ??? \|\| bgcolor=#60FF00 \| 27uS \|\| bgcolor=#60FF00 \| 44uS \|\| bgcolor="orange" \| 100uS\|\| bgcolor=#60FF00\| 26uS \|\| bgcolor="yellow"\| ??? \|\|

JulienB: /* Performances */

2009-11-20T09:48:44Z

Performances

← Older revision		Revision as of 11:48, 20 November 2009
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	! Use case !! System -> Driver !! SPI comm !! Acquisition time !! EOC IT handling !! SPI comm !! Driver -> System !! Total time / Max speed		! Use case !! System -> Driver !! SPI comm !! Acquisition time !! EOC IT handling !! SPI comm !! Driver -> System !! Total time / Max speed
	\|- align="center"		\|- align="center"
	\| 1 channel acquisition through /sys/ (averaging) \|\| bgcolor="yellow"\| ??? \|\| bgcolor=#60FF00 \| xx \|\| bgcolor=#60FF00 \| \|\| bgcolor="orange" \| \|\| bgcolor=#60FF00\| \|\| bgcolor="yellow"\| ??? \|\|		\| 1 channel acquisition through /sys/ (averaging) \|\| bgcolor="yellow"\| ??? \|\| bgcolor=#60FF00 \| 27uS \|\| bgcolor=#60FF00 \| 44uS \|\| bgcolor="orange" \| 100uS\|\| bgcolor=#60FF00\| 26uS \|\| bgcolor="yellow"\| ??? \|\|
	\|- align="center"		\|- align="center"
	\| 1 channel + Temp acquisition through /sys/ (no averaging) \|\| bgcolor="yellow"\| ??? \|\| bgcolor=#60FF00 \| 25uS \|\| bgcolor=#60FF00 \| 90uS \|\| bgcolor="orange" \| 114uS \|\| bgcolor=#60FF00 \| 44uS \|\| bgcolor="yellow"\|??? \|\|		\| 1 channel + Temp acquisition through /sys/ (no averaging) \|\| bgcolor="yellow"\| ??? \|\| bgcolor=#60FF00 \| 25uS \|\| bgcolor=#60FF00 \| 90uS \|\| bgcolor="orange" \| 114uS \|\| bgcolor=#60FF00 \| 44uS \|\| bgcolor="yellow"\|??? \|\|

JulienB: Add table to see what is possible with MAX1027 on our platform

2009-11-20T09:39:06Z

Add table to see what is possible with MAX1027 on our platform

@@ Line 171: / Line 171: @@
 ===On APF27Dev===
 Nothing special to do: MAX1027 is already set in "fast mode" and using #EOC and #CNVST pins.
 ==Links==

JulienB: /* Hardware interface */

2009-11-20T09:00:51Z

Hardware interface

← Older revision		Revision as of 11:00, 20 November 2009
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	==Hardware interface==		==Hardware interface==
	{{Warning\|The 8 inputs voltage range is [0 - 3,3V]. Don't try to put higher voltage ~~on ADC inputs.~~}}		{{Warning\|The 8 ADC inputs voltage range is [0 - 3,3V]. Don't try to put higher voltage !!}}
	By default internal reference voltage is used ('''2,5V'''), so if you apply analog values > 2,5V, they will be truncated.		By default internal reference voltage is used ('''2,5V'''), so if you apply analog values > 2,5V, they will be truncated.

JulienB: /* MAX1027 on APF9328 board */

2009-11-20T08:59:58Z

MAX1027 on APF9328 board

← Older revision		Revision as of 10:59, 20 November 2009
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	==MAX1027 on APF9328 board==		==MAX1027 on APF9328 board==
	It is mounted (in option) on the [[APF9328]] ~~boards~~. To know if you have one on your APF938, take a look at the connectors side of the module:		It is mounted (in option) on the [[APF9328]] module. To know if you have one on your APF938, take a look at the connectors side of the module:
	[[image:APF9328_with_MAX1027.jpg\|center\|frame\|'''figure 2''' - ''MAX1027 localisation on APF9328'']]		[[image:APF9328_with_MAX1027.jpg\|center\|frame\|'''figure 2''' - ''MAX1027 localisation on APF9328'']]

JulienB: /* Hardware interface */

2009-10-29T21:35:06Z

Hardware interface

← Older revision		Revision as of 23:35, 29 October 2009
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	{{Warning\|The 8 inputs voltage range is [0 - 3,3V]. Don't try to put higher voltage on ADC inputs.}}		{{Warning\|The 8 inputs voltage range is [0 - 3,3V]. Don't try to put higher voltage on ADC inputs.}}
	By default internal reference voltage is used ('''2,5V'''), so if you apply analog values > 2,5V, they will be truncated.		By default internal reference voltage is used ('''2,5V'''), so if you apply analog values > 2,5V, they will be truncated.
	~~The i.MXL SPI_1 interface is used to communicate with the device.~~

	[[image:MAX1027_connections.png\|center\|frame\|'''figure 3''' - ''MAX1027 connections'']]		[[image:MAX1027_connections.png\|center\|frame\|'''figure 3''' - ''MAX1027 connections'']]

	===On APF9328===		===On APF9328===
			The i.MXL SPI_1 interface is used to communicate with the device.
	{{Warning\|		{{Warning\|
	In the original design we thought using AIN7 as analog input and ~~not using~~ #EOC, but due to some chip bugs, it is now required. So if you want to use the MAX1027 then you will have to connect #EOC pin (End Of Conversion) and #CNVST pin (conversion start) to two i.MXL GPIOs.}}		In the original design we thought using AIN7 as analog input (instead of #CNVST) and thought too we won't need #EOC; but due to some chip bugs, it is now required. So if you want to use the MAX1027 then you will have to connect #EOC pin (End Of Conversion) and #CNVST pin (conversion start) to two i.MXL GPIOs.}}
	By default the driver is using:		By default the driver is using:
	* PA13 (CSI_HSYNC) for #EOC		* PA13 (CSI_HSYNC) for #EOC