question about mcbsp2 problem in omap4470?

Stanley Zhang

Other Parts Discussed in Thread: WL1281, 4430, 4460

HI,

I use Wl1281(fm tx/fm rx/bt/wifi/gps) chip to communicates with omap4470. All other functions are well besides of FM TX.

The Fm TX uses MCBSP2 DX/CLK/FS to connect with wl1281, and wl1281 acts as master, it sends clk about 1.5M and fs is 48k. But now no data sends from msbsp2 tx pin to wl1281. I checkd codes in sound/soc/omap/, all look well. Besides the same code works well on omap4430/omap4460, and i test mcbsp2 as master then it can outputs data/clk/fs.

So, maybe some differents between 4430 and 4470 on MCBSP when acts as slave mode ? and how i can work around it?

sorry for my poor English...

Besides

over 13 years ago

0 Israel Cepeda over 13 years ago

TI__Expert 5515 points

Hi Stanley,

Are you using your own platform or a TI platform?, also what release are you using?, I would like to check at the driver because the McBSP modules should be the same in OMAP4 chips. Thanks

0 Stanley Zhang over 12 years ago in reply to Israel Cepeda

Prodigy 70 points

HI,

We use TI platform. We fetch code from git.omapmedia.org and have checkd ICS and JB, fm tx no data transmitted on mcbsp2 dx on both platform.

I confused why same code works well on 4430/4460 but not 4470? so any suggestion

BRs

0 Israel Cepeda over 12 years ago in reply to Stanley Zhang

TI__Expert 5515 points

Do you see changes in the McBSP2 TX register?, or are you checking the signal in the pin?

I am going to check that but I will need to look for a test point to get the signal, will come back with my findings.

0 Israel Cepeda over 12 years ago in reply to Stanley Zhang

TI__Expert 5515 points

Hi Stanley,

Seems like there is a similar issue in the post http://e2e.ti.com/support/omap/f/849/t/215870.aspx

I just replay there, you can try the same. But basically the pin muxing seems to be different for omap4430/60 vs 4470, so it would be good if you can verify using omapconf application. It is open source :)

Please let me know how it goes.

Processors

Processors forum

question about mcbsp2 problem in omap4470?