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Message
From: cbr_929rr at hotmail.com<cbr_929rr@h...>
Date: Sat Oct 28 01:23:03 CEST 2006
Subject: [oc] Using I2S Master
I changed the conf ratio to "00001011", bypassed the WB_interface and
it started working.
The ACLK and LRCLK seemed to be what I expected. However, the SCLK
was not.
I used a FIFO to latch the data and read it out based on ACLK.
Thanks.
Cbr
----- Original Message -----
From: cbr_929rr at hotmail.com<cbr_929rr@h...>
To:
Date: Wed Oct 25 01:52:50 CEST 2006
Subject: [oc] Using I2S Master
> I know that there are atleast a few in this group who have used
> this
> core and know how to configure it.
> Can anyone be kind enough to help me out?
> Thanks,
> Cbr
> ----- Original Message -----
> From: cbr_929rr at hotmail.com<cbr_929rr at h...>
> To:
> Date: Thu Oct 19 06:18:42 CEST 2006
> Subject: [oc] Using I2S Master
> > I'm trying to use the Opencores I2S master logic as the driver
> for
> > my
> > test platform to generate test audio signals.
> > The core came configured with SCK = 2.77 MHz and WS(left/right
> > clock)=
> > 69.44 KHz.
> > I would like to be able to reconfigure the core to generate
> > SCK=3.07MHz
> > and WS=48 KHz.
> > I played around with the conf variable but could not get the
> ratio
> > I'm
> > looking for.
> > I read the documentation but I still cannot understand. An
> > explanation
> > would certainly help.
> > According to the manual,
> > The sample rate is given by bit_rate/(RES * 2)
> > If I choose the sample rate to be 48 KHz, and the resolution
> is
> > 20-bits,
> > the bit rate would be 1.92 Mbps.
> > However, the RATIO would then be calculated as follows.
> > RATIO= (wishbone_bus_clock - (sample_rate * RES * 8)) /
> > (sample_rate * RES * 4)
> > wishbone_bus_clock= 50 MHz
> > sample rate = 48 KHz
> > RES=20 bits
> > which would then be equal to ~22 (10110)
> > This is not giving me the values of 48KHz for WS and 3.072 MHz
> for
> > i2s_sck.
> > Could you please help?
> > Thanks,
> > cbr
> >
> >
>
>
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