Forums

SPI and I2S on SHARC ADSP-21369

Started by Omer Osman February 7, 2010
Hello world,

I am putting together my first embedded DSP processor with an FPGA and
I am wondering if there are specific pins I should use in the DPI for
SPI (i will need two seperate SPI buses, one for FPGA and another for
DSP-DSP comm). Also, if there are specific pins to use for I2S on the
DAI or if any can be routed in software.


Danke,

Omer Osman
For the I2S you can use any DAI pins you like.

As regards the SPI you need should be aware that for booting putposes the 
SRU connects all SPI signals to certain pins by default after reset (look in 
the manual under the SRU chapter).
Of course you can change that, too. But most people boot through SPI.

Bittesch�n :-).

J�rg

"Omer Osman" <research@ottomaneng.com> wrote in message 
news:80ab376c-4b35-431b-8c1f-41b54062abfe@d37g2000yqa.googlegroups.com...
> Hello world, > > I am putting together my first embedded DSP processor with an FPGA and > I am wondering if there are specific pins I should use in the DPI for > SPI (i will need two seperate SPI buses, one for FPGA and another for > DSP-DSP comm). Also, if there are specific pins to use for I2S on the > DAI or if any can be routed in software. > > > Danke, > > Omer Osman
--- news://freenews.netfront.net/ - complaints: news@netfront.net ---
"BitCrusher" <jweissflog@satx.rr.com> wrote in
news:hkpgkd$2t9j$1@adenine.netfront.net: 

> For the I2S you can use any DAI pins you like. > > As regards the SPI you need should be aware that for booting putposes > the SRU connects all SPI signals to certain pins by default after reset > (look in the manual under the SRU chapter). > Of course you can change that, too. But most people boot through SPI. > > Bittesch&#2013266166;n :-). > > J&#2013266166;rg > > "Omer Osman" <research@ottomaneng.com> wrote in message > news:80ab376c-4b35-431b-8c1f-41b54062abfe@d37g2000yqa.googlegroups.com... >> Hello world, >> >> I am putting together my first embedded DSP processor with an FPGA and >> I am wondering if there are specific pins I should use in the DPI for >> SPI (i will need two seperate SPI buses, one for FPGA and another for >> DSP-DSP comm). Also, if there are specific pins to use for I2S on the >> DAI or if any can be routed in software. >> >> >> Danke, >> >> Omer Osman > > > > --- news://freenews.netfront.net/ - complaints: news@netfront.net ---
DPI 1 = MOSI DPI 2 = MISO DPI 3 = SCK DPI 5 = SS# for FLASH BOOT The rest of the DPI use any way you want. I would use a 21469 for a new design and use the link ports for FPGA interconnections. DPI & DAI are the same as 21369 If you need external DRAM, 21369 SDRAM expansion is much easier than 21469 which uses DDR2. We do make a 21369 + Cyclone III dspblok module. Al Clark www.danvillesignal.com