DMA connections in stm32f103c8

armindavatgaran · ‎2015-05-09

Posted on May 10, 2015 at 07:31

Hello

according to it's datasheet and reference manual, only DMA1 controller is active in this device.

Is GPIO peripheral connected to DMA streams in this device so that GPIO to memory transfers can be implemented?

Thanks.

Tesla DeLorean · ‎2015-05-10

Posted on May 10, 2015 at 14:01

Pretty sure the F1 doesn't have the APB1/2 vs DMA1/2 associations of the other models.

Being on the APB does, as I recall, makes input/output to the GPIO on the F1 series relatively slow. I'd expect M2M transfers to also work.

DCMI might be a faster parallel input method.

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armindavatgaran · ‎2015-05-10

Posted on May 10, 2015 at 20:13

Thanks for your answer, but as whole how to know which families support GPIO to memory transfers?Is it sufficient to have DMA2 controller?

If the answer is yes, so in the page 275 of RM0008 it is mentioned that high and XL-density series of stm32f101xx/102xx/103xx/105xx/107xx have DMA2 controller.