From: "Flávio Alberto Lopes Soares" <flavioalsoares-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: how to access spi ADC on high sample rate ?
Date: Tue, 5 Apr 2011 02:39:45 -0300 [thread overview]
Message-ID: <BANLkTin2zT9Wp3EUHLrdthuoU50S8cry2A@mail.gmail.com> (raw)
Hello all, I'm using an ads8320 analog/digital converter connected to a
2S3C2440 Samsung ucontroller by a SPI bus, I'm using spidev driver on kernel
2.6.32 to access it from user space and this works fine.
The problem occurs because I want to access this adc in your max sample rate
possible (100K Samples/s according datasheet, 50% of this for me will be
great) saving this data, reading using an application in user space only
reach 200 Samples/s in linux kernel, this is for me was not surprising
because the application runs in user space and process scheduler time slice
prevents achieve a faster sample rate. I want to know the best way to access
this adc (I believe I need write a kernel driver), there's some reference
example or documentation to do this ? Some audio capture driver can serve as
reference ?
Thanks in advance
Flavio Alberto Lopes Soares
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reply other threads:[~2011-04-05 5:39 UTC|newest]
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