CYW43907 SPI behavior

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CYW43907 SPI behavior

JuMo_1762556
Level 3
Level 3
First like received First like given
‎Apr 02, 2018 06:48 PM
‎Apr 02, 2018 06:48 PM
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I am using WICED-Studio-6.0 on CYW943907AEVAL1F platform.

I am facing a trouble of CYW43907 SPI behavior.

When I write "0x01" to SPI device, the device can't get the data correctly.

Please see the oscilloscope waveform below. somehow the last bit width is half of clock period.

This is a reason why SPI device can't get the data.

Please let me know how I can fix it.

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Re: CYW43907 SPI behavior

VinayakS_26
Moderator
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100 replies posted 50 replies posted 25 replies posted
‎Apr 03, 2018 12:53 AM
‎Apr 03, 2018 12:53 AM
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Hi Morise,

This is an internal issue with the gsio driver. The last bit width will only last for half the clock period. Could you change the driver to bit banging and see if this issue persist. Go though the following blog to see how to change the driver. SPI in CYW43907

-Thanks

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