key scan setup

tony li48039

Prodigy 160 points

I referred the document the sprufi8a.pdf.

I initilized the function of key scan.

1) turn on the lpsc module

2) initialize the pinmux register ( I set pinmux2 register as 0x3ff)

3) set strobe width as 05 , intervaltime as 02

4) set key ctl register as 09

5) enable the INTENA

But I cann't see the output pluse in key b(output)

why?

Thanks all!

over 15 years ago

0 Miguel A. Alanis over 15 years ago

TI__Genius 9490 points

Tony,

Have you set the PERI_CLKCTL? for indicating the clock source of the KEYSCAN?

There is a good example of setting the Keyscan provided on the dm365 EVM website.

http://support.spectrumdigital.com/boards/evmdm365/reve/files/EVMDM365_BSL_reve.zip

...\tests\switch

Please compare your setup vs what Spectrum did.

regards,

miguel

0 tony li48039 over 15 years ago in reply to Miguel A. Alanis

Prodigy 160 points

Dear miguel:

Yes .I have set PERI_CLKCTL . I also referred the EVMDM365_BSL_reve.zip

When I set those value, I can only see the low level in key out.

When I run the ..\test\switch ,I can also see low level in key out.

0 Miguel A. Alanis over 15 years ago in reply to tony li48039

TI__Genius 9490 points

Tony,

Have you tried running the 'switch' evm test with CCS on the EVM, along with its CCS Gel file(which initializes other system parameters)? I've checked with Spectrum digital and they test this keypad operation during factory testing, if you can not get keypad working with spectrum's code and their Gel file, then they recommended for you to contact their support dept (support@spectrumdigital.com) to resolve it or do a RMA.

Also, are you running this on the DM365 EVM or a different platform?

regards,

miguel

0 tony li48039 over 15 years ago in reply to Miguel A. Alanis

Prodigy 160 points

Dear miguel:

Thanks for your help ! It is not the problem of Gel file, I have solved it.

Good luck!

0 Miguel A. Alanis over 15 years ago in reply to tony li48039

TI__Genius 9490 points

Tony,

that's good, if you don't mind you can post the solution so others can benefit in the community.

regards,

miguel

0 tony li48039 over 15 years ago in reply to Miguel A. Alanis

Prodigy 160 points

hello miguel

It is not software problem. It is the problem of my hardware board.The squence of hardware pin is wrong.

thanks miguel!

0 Miguel A. Alanis over 15 years ago in reply to tony li48039

TI__Genius 9490 points

Thanks for the confirmation Tony.

regards,

miguel

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key scan setup