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SPI Clock Pin No Output STM32F103CBT7


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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?


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