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Infinite data transmit using SPI

SPark.28
Associate II

I am testing with STM32F769 Discovery board to make video syncs (not vsync, hsync).

I am using SPI module to make infinite clock and data.

But, it seems not supported in normal and DMA transmit mode (there is delay between transmissions).

How should i do to transmit data and clock signal infinitely without delay?

1 ACCEPTED SOLUTION

Accepted Solutions
KnarfB
Principal III

Depends on the freq. range and data width. Alternatives may be DMA driven GPIO port output or DMA driven modulated Timer PWM.

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2 REPLIES 2
KnarfB
Principal III

Depends on the freq. range and data width. Alternatives may be DMA driven GPIO port output or DMA driven modulated Timer PWM.

TDK
Guru

Circular DMA is able to transmit infinitely without delay. I have used it on many projects in this way.

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