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fullcustomasic · 2024-01-27

Hello,I am using DMAMUX(dm) chaining, that means there are n dm channels and the previous is generating an event for the next dm channel as a sync input. I noticed that there is a latency in the transition of one dm channel to the next one. For examp...

fullcustomasic · 2024-01-06

Hello community!I set up a dmamux channel, which is working perfectly in unconditional mode(direct mux). Now I want to use synchronous mode, where the EXTI0 line Interrupt is the trigger(or latch), so it initiates the DMA request transactions. I get ...

fullcustomasic · 2023-12-05

Hello community,I cant get the dma working on the stm32g474. What I did till now:- enabled tim15 -> working with interrupts- enabled dma req. on update event- enabled dma and dmamux clocks in rcc- enabled dma int in nvic -> can be triggered through n...

fullcustomasic · 2024-01-07

Ok..so apparently only 'real hardware interrupts' can be used for DMAMUX. I configured the user button and routed exti13 via this button as interrupt, now the DMAMUX is doing what it should. But its pretty sad that you cant trigger that via software....

fullcustomasic · 2024-01-06

Yes its something else. I want basically to start a DMAMUX-chain. EXTI0 is the initial trigger to start the transaction-chain:EXTI0 is triggeredMUX_ch0 starts redirecting dma requests generated by a timer as soon as EXTI0 trigger is detected. (NBREQ ...

fullcustomasic · 2024-01-06

I understood it like that: You can have a trigger(DMAREQ_ID) and a latch(SYNC_ID). No matter what is happening with the trigger, as long as no 'latch' is detected, no dmarequest is redirected. Only when a latch signal occurs, (NBREQ + 1) requests are...

fullcustomasic · 2023-12-09

Thank you! I forgot to set the offset. br

fullcustomasic · 2023-12-05

This is a code snippet with the relevant section @nvic init @enable nvic ldr r1, =#0xe000e100 @tim15 int set ldr r2, =#0x1000000 @dma1_ch1_int set ldr r3, =#0x800 orr r2, r3 str r2, [r1] @dma init ldr r0, =RCC ldr r1, [r0] orr r1, RCC_AH...

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DMAMUX transition latency

Synchronous mode for DMAMUX - Trigger via EXTI

DMAMUX configuration

Re: Synchronous mode for DMAMUX - Trigger via EXTI

Re: Synchronous mode for DMAMUX - Trigger via EXTI

Re: Synchronous mode for DMAMUX - Trigger via EXTI

Re: DMAMUX configuration

Re: DMAMUX configuration