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AUDIO FORUMS >> Digital >> SPI Clock Pin No Output
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Message started by fight on 11/19/21 at 03:57:04

Title: SPI Clock Pin No Output
Post by fight on 11/19/21 at 03:57:04

I am using STM32F103CBT7 for my design with HAL functions at a 72MHz system clock.
SPI 1 is configurated as Master, 16-bit data width at 18 MBits/s.
When sending data out, there is a data bit on the MOSI pin, but there is no Clock pulse on the SCK pin.
I can't figure out what is wrong.
Any suggestion?
I've read some tutorials like https://www.kynix.com/components/STM32F103CBT7-Microcontroller-CAD-Models-Datasheet-Features.html, but I still have no idea.
Thanks.

Title: Re: SPI Clock Pin No Output
Post by CAJames on 11/19/21 at 16:07:46

Are the clock and data output at the same voltage and frequency?

Title: Re: SPI Clock Pin No Output
Post by fight on 11/20/21 at 01:55:29

Yes, they are the same.

Title: Re: SPI Clock Pin No Output
Post by CAJames on 11/20/21 at 14:07:52

It's been many years since I messed with ICs (as we called them when I was in school) but that sounds like a bad chip to me. Unless of course you need another signal to enable the clock out.