* At91 SPI Driver is broken... Or has at least changed the way it works...
@ 2009-05-19 13:11 oliver munz @ s p e a g
0 siblings, 0 replies; only message in thread
From: oliver munz @ s p e a g @ 2009-05-19 13:11 UTC (permalink / raw)
To: ecos-devel
I usesd the AT91-SPI driver last year for accessing two devices which
are using 24-bit data-words. My working code looked like this:
...
cyg_spi_transaction_begin(spi_device);
HAL_WRITE_UINT32(AT91_PIO + AT91_PIO_SODR, PA_SSPLL |
PA_SSDDS | PA_SSIQ0 | PA_SSIQ1);
HAL_WRITE_UINT32(AT91_PIO + AT91_PIO_CODR, device & (PA_SSPLL |
PA_SSDDS | PA_SSIQ0 | PA_SSIQ1));
cyg_spi_transaction_transfer(spi_device, false, send_size, send,
NULL, false);
HAL_WRITE_UINT32(AT91_PIO + AT91_PIO_SODR, PA_SSPLL |
PA_SSDDS | PA_SSIQ0 | PA_SSIQ1);
cyg_spi_transaction_end(spi_device);
...
Now i have a newer version of eCOS and this code dosnt beave good
anymore. The problem is, that the CS goes between every byte, thus my
devices get not 24-bit-words but 3 times a 8-bit-word. So my SW doesent
work anymore, and i need to know. if i have to fix the driver and make a
patch, or if the driver is ok, and i have to change the way i use the
SPI-infrastructur...
Thanks for answers
Oliver Munz
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2009-05-19 13:11 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2009-05-19 13:11 At91 SPI Driver is broken... Or has at least changed the way it works oliver munz @ s p e a g
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).