Hi, I have been asked to test McBsp interface on OMAP.

Im configuring the Aic29 Codec and McBsp and am writing a square wave pattern.

Its not working, im not able see anything on the CRO when i probe.

Before witing to the McBsp, i ensure that the previous data is read, So i read Serial Port Control Register (SPCR1) and check for RFULL bit(Reciever Full Bit).

Whenever, i read im getting 0xFFFF.

The reset value for this register is 0x0000. Atleast i should get the reset value when i read, isnt it?.

Im directly reading the physical address of the register as given by the datasheet.

Do i need to do something - so that whenever i access that particular address, it actually accesses the mcbsp register.

Im not sure if it a memory map problem or something else, im unable to figure out what could be wrong.

Can you help me on this.

Thanks,

Regards, sriram