Dm365 + SPI + PWM Issue

Shadakshari KP

Hi all,

i am using DM365 processor and DaVinci-PSP-SDK-03.21.00.04 kernel on it, i wanted SPI support so i came to this kernel but what really happened is i cant touch PWM registers,

i tried with devmem <PWM REG ADRESS> 32 <VAL to be SET>

its not setting my required value

all address are just showing 0x00000000

and also i tried through using ioremap inside my own driver this is also not able to set (even see) the values,all registers are just showing 0x00000000

But when i was using linux-2.6.18_pro500 kernel on my DM365 all these above things to access tp PWM were working...But SPI1 support was not there...

pls help me

Thanks in Advance

Hari

over 14 years ago

0 Marcus Cooksey over 14 years ago

TI__Genius 9510 points

Have you rebuilt the devmem userspace tool. Also is the /dev/mem kernel driver built?

0 Shadakshari KP over 14 years ago in reply to Marcus Cooksey

Intellectual 545 points

thanks for your reply

i didnt understand fully, can you explain me how to test in brief...

thanks

0 Marcus Cooksey over 14 years ago in reply to Shadakshari KP

TI__Genius 9510 points

If you're attempting to use the same binary that came with the MontaVista distribution then it will not work on the non-MontVista distribution. Therefore you'll need recompile the devmem application. I'm not sure where to obtain the source. If you have the source then set the toolchain up properly and recompile the source. Also this application depends on the devmem driver. So this will needs to be rebuilt and loaded (if it's not already built into the kernel). You can determine if the driver is present by list the /dev directory. There should be a mem file present if it's installed.

0 Shadakshari KP over 14 years ago in reply to Marcus Cooksey

Intellectual 545 points

Hi sir,

devmem is working ...But my problem is i tried to ioremap the PWM base address in my own driver and tried to access the PWM registers of DM365, its not accessible.....

what is the problem...

thanks

0 Marcus Cooksey over 14 years ago in reply to Shadakshari KP

TI__Genius 9510 points

Could you include the source for devmem and your application?

0 jk laoking over 12 years ago in reply to Shadakshari KP

Prodigy 55 points

hello,have you solved this problem? I have encountered the same problem as yours ,can you give me some tips? Thanks!

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Dm365 + SPI + PWM Issue