how to access spi ADC on high sample rate ?

how to access spi ADC on high sample rate ?

[Flávio Alberto Lopes Soares]

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
------------------------------------------------------------------------------
Xperia(TM) PLAY
It's a major breakthrough. An authentic gaming
smartphone on the nation's most reliable network.
And it wants your games.
http://p.sf.net/sfu/verizon-sfdev