About diverger

diverger · 2024-08-21

Hi,I'm struggling with timer triggered ADC + linked list DMA. I have two nodes in one list. The ADC is triggered by timer. By counting the HC and TC, it shows the first node can be run well. but the second node never fire the TC or HT. Where the pro...

diverger · 2024-08-21

Hi,When using the linked-list DMA, there are two places show the 'Transfer Event Generation', one is in the 'GPDMA1' settings and the others in the 'LINKEDLIST' nodes settings. Are they refer to the same thing? If so, are there any reason to let user...

diverger · 2024-08-21

Hi,For the SPI transfer APIs with suffix '_DMA'. In the transmit and receive alone ones, they checked 'hspi->hdmatx' and 'hspi->hdmarx' respectively. But in 'HAL_SPI_TransmitReceive_DMA()', it only check the 'hspi->hdmarx'. Funny :), and why? /* Pa...

diverger · 2024-08-21

Hi,I'm trying to combine the SPI and GPDMA on STM32U5. In the various SPI transfer APIs with suffix '_DMA', I can see the code below: /* Enable the Tx DMA Stream/Channel */ if ((hspi->hdmatx->Mode & DMA_LINKEDLIST) == DMA_LINKEDLIST) { if (h...

diverger · 2024-08-20

Hi,With GPDMA standard mode, I implemented timer triggered SPI DMA transfer. But the 'Size' argument of the 'HAL_SPI_TransmitReceive_DMA()' is 'unit16_t', this means it can only transfer 64k bytes once. Are there any method to transfer beyond this va...

diverger · 2024-08-22

Hi,If they refer to the same thing, then there are possibilities that they are set to different values. In that case, which one will take effect? That is, how they affect the final code, what's the logic behinds?Thanks.

diverger · 2024-08-21

It seems there are something wrong in my ADC settings.

diverger · 2024-08-20

Hi,After changing to linked-list DMA, the code enter into hard fault exception when run the code below (in the SPI xfr APIs): /* Packing mode management is enabled by the DMA settings */ if (((hspi->Init.DataSize > SPI_DATASIZE_16BIT) && (hspi->h...

diverger · 2024-08-20

Hi,It seems there are something not clear now.For the SPI transfer APIs without '_DMA' suffix, they all accept an 16-bit 'Size', which mean the 'number of' transfers. That means they are counted in 'transfers', but not bytes. I think I can enlarge th...

diverger · 2024-07-21

Hi,I think my guess is right. After the EOT interrupt enabled, it will fire the SPI EOT IRQ, and the SPI IRQ handler will be called, then the same TxRx complete interrupt callback will be called. So, the strategy is mask the SPI's EOT interrupt, and ...

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The node can't be linked when using timer triggered ADC + linked-list DMA on STM32U5

'Transfer Event Generation' settings in 2 places in cubeMX/cubeIDE for STM32U5

Why check only the 'hspi->hdmarx' in the 'HAL_SPI_TransmitReceive_DMA()' for STM32U5?

The purpose of the 'if ((hspi->hdmatx->Mode & DMA_LINKEDLIST) == DMA_LINKEDLIST)' in STM32U5 SPI transfer with DMA APIs

Timer triggered SPI transfer with data size beyond 64k bytes

Re: 'Transfer Event Generation' settings in 2 places in cubeMX/cubeIDE for STM32U5

Re: The node can't be linked when using timer triggered ADC + linked-list DMA on STM32U5

Re: Timer triggered SPI transfer with data size beyond 64k bytes

Re: Timer triggered SPI transfer with data size beyond 64k bytes

Re: How to know the when the DMA transfer done?