How to enable McASP0 in dm8168 for audio

Inigo Oyarbide

Hi all,

We are developing a custom dm8168 board, so we need to enable the McASP0 instead of McASP2. I have change board_ti8168evm.c, davinci-evm.c and devices.c changing McASP2 to McASP0.

Nevertheless, with the application devmem of the RidgeRun SDK I notice that the value of the register 0x48181540 (McASP0, modemux) is 0x0 instead of 0x2.

My question is, where is it possible to enable that register to have McASP0 module enabled?

BR,

Inigo

over 11 years ago

0 Brad Griffis over 11 years ago

TI__Guru*** 125430 points

You must first program CM_ALWON_MCASP0_CLKCTRL to enable the module.

0 Inigo Oyarbide over 11 years ago in reply to Brad Griffis

Intellectual 720 points

Thanks Brad,

But the question is where. I see that in the cpu.h file (~/bootloader/u-boot-2010.06/src/arch/arm/include/asm/arch-ti81xx) I can put:

#ifdef CONFIG_TI816X
#define CM_ALWON_MCASP0_CLKCTRL (PRCM_BASE + 0x1540)
#endif

Is this Ok, or I need to configure more files?

Regards,

Inigo

0 Brad Griffis over 11 years ago in reply to Inigo Oyarbide

TI__Guru*** 125430 points

That's just a register definition, i.e. by itself it does nothing at all. Is that register being written anywhere? Please look at the value of that register and look up the definition of the register in the TRM to enable McASP0.

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How to enable McASP0 in dm8168 for audio