inputFrequency settings for i2c on TMS320DA828

Rajarama M Bhat

hi,

We are using TMS320DA828 custom board. PSP version is 2.00.01 which was originally meant for DSKDA830EVM.
According to the datasheets i2c0 should get the clock from Auxclock. Since DSKDA830EVEM's crystal is 24Mhz, auxclk should also be 24Mhz.But in packages\ti\psp\cslr\soc.xs file the i2c0 inputFrequency is mentioned as 50000000Hz(50Mhz) which is in contradiction to the datasheet(?). In our custom da828 board we have 24Mhz crystal.So I am confused whether I should give 24Mhz as the inputFrequency or should it be 50Mhz? Can somebody please help us on this?

Thanks and Regards,
Rajaram

over 12 years ago

0 Rahul Prabhu over 12 years ago

TI__Guru** 116170 points

Hi Rajaram,

The psp driver seems to be setting the I2C0 input frequency to the max value of AUXCLK [range 15 to 50 Mhz]. I agree this needs to be configured to AUXCLK which in your case is 24Mhz. Please refer to this post where a similar issue was reported and subsequently fixed:

http://e2e.ti.com/support/dsp/omap_applications_processors/f/42/t/12431.aspx

Thanks for pointing this out. This will help other users configure the input clocks appropriately.

Regards,

Rahul

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inputFrequency settings for i2c on TMS320DA828