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How to send additional bit?

Question asked by John Doe on Feb 6, 2017
Latest reply on Feb 9, 2017 by Clive One


I'm trying to implement a software that will allow me to send additional one pulse (on the data wire and clock wire). After one pulse I should send data (32 bits) over spi.


Frame should look like:

1 bit + 32 bit

clock pulse every bit


I tried to send 0x80 over SPI and USART but no luck - for 0x80 i have 8 clock pulses. How to implement one clock pulse? PWM? Timers? Dma? 

I would be grateful for every idea !