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RE?: RE?: [ECOS] Does AT91 SPI driver supp ort external SPI devices?
- From: Julien Stéphane <Stephane dot Julien at he-arc dot ch>
- To: <ecos-discuss at ecos dot sourceware dot org>
- Cc: <andrew at lunn dot ch>, "Etique Philippe" <Philippe dot Etique at he-arc dot ch>
- Date: Wed, 28 Feb 2007 16:33:57 +0100
- Subject: [ECOS] RE?: RE?: [ECOS] Does AT91 SPI driver supp ort external SPI devices?
- References: <F7620004260C5D4DB836EDBF8CC6872D028943B5@neptune.intra.eiaj.ch> <F7620004260C5D4DB836EDBF8CC6872D028943B6@neptune.intra.eiaj.ch> <20070228144319.GC24209@lunn.ch> <F7620004260C5D4DB836EDBF8CC6872D028943B7@neptune.intra.eiaj.ch> <20070228151737.GA14399@lunn.ch>
I don't know how to put the correct value because my board (AT91EB55) use a BIN/OCT converter. So if I want to use the device 4, the value of NPCS0=0, NPCS1=0, NPCS2=1 and NPCS3=0.
The pins number of different NPCS are : NPCS0=pin98 (PA26), NPCS1=pin99 (PA27), NPCS2=pin100 (PA28) and NPCS3=pin101 (PA29).
What does the AT91_PIN(.., .., ..) mean? Do I have to devine the AT91_SPI_NPCS1 in my code or in the driver? I think in my code...
Regards,
Stéphane
________________________________
> Thank you for your help! Indeed, I didn't checked the pins in
> CDL. So I use the default values : AT91_SPI_NPCS0, AT91_SPI_NPCS1,
> AT91_SPI_NPCS2, AT91_SPI_NPCS3. Is it correct or do I havt to chage
> it?
You have to answer that by looking at the schematic of the board you
are using. Which pin on the chip is connected to the chip select of
your device? For example, on the AT91SAM7X, NPCS1 can be
#define AT91_SPI_NPCS1 AT91_PIN(0,0,13) // SPI 0 Chip Select 0
#define AT91_SPI_NPCS1X AT91_PIN(0,1, 7) // SPI 0 Chip Select 1
#define AT91_SPI_NPCS1XX AT91_PIN(1,1,13) // SPI 0 Chip Select 1
Andrew
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