Hello, STM32L4R also has DMAMUX with two DMAx controllers. Maybe it is closer match for STM32G4 than H7.
Check: https://github.com/apache/incubator-nuttx/blob/master/arch/arm/src/stm32l4/stm32l4xrxx_dma.c https://github.com/apache/incubator-nuttx/blob/master/arch/arm/src/stm32l4/hardware/stm32l4xrxx_dmamux.h -Jussi On 7.5.2020 8.25, raiden00pl . wrote: > You can look how DMAMUX is implemented for stm32h7. > It's more complicated than in G4 and H7 is based on DMA IPv2 but the > concept should be the same. > I got my NUCLEO-G431RB so I can help. > > czw., 7 maj 2020 o 00:15 Nathan Hartman <hartman.nat...@gmail.com> > napisał(a): > >> On Wed, May 6, 2020 at 6:10 PM Nathan Hartman <hartman.nat...@gmail.com> >> wrote: >>> On Wed, May 6, 2020 at 4:56 PM Gregory Nutt <spudan...@gmail.com> wrote: >>>>> In arch/arm/src/stm32/hardware/stm32_dma_v1.h, I have to add DMA >>>>> channel mappings of the form: >>>>> >>>>> # define DMACHAN_ADC1 STM32_DMA1_CHAN1 >>>>> >>>>> for the (new) case of CONFIG_STM32_STM32G47XX. >>>>> >>>>> How / where can I find the names and values that should be defined? >>>> >>>> Probably in the data sheet rather that the user manual >>> >>> I am beginning to see what's going on here, but I don't claim to >>> understand how this works yet. >> >> Oh, I forgot to say, the datasheet contains almost nothing. The >> information seems to be in the Reference Manual after all (though I >> didn't see it earlier because I was looking for a table of peripherals >> to DMA channels, like you'd expect to find on most MCUs). The >> reference manual is RM0440 Rev 2, and it's in Table 81 (pages 383-384) >> where it seems that each peripheral DMA source/destination has a >> decimal number from 1 to 115, representing the DMAMUX input request >> number. >> >> Nathan >> >
