About devchang

devchang · 2024-08-16

There is a rare issue where the DMA operation occasionally stops during the burst transfer of data from external SDRAM to eMMC via DMA. I’m having difficulty identifying the exact cause, so I’m posting here to see if anyone has any good ideas.The har...

devchang · 2024-07-15

Hello,I am implementing UART RX reception using DMA, but I am encountering an issue where the data is not correctly updated in the memory buffer connected to the DMA. Below is the code I configured. #define DMA_BUFFER_SIZE 10 uint8_t dma_buffer[DMA_...

devchang · 2024-06-03

I am experiencing processor freezes at certain points of use in our products using STM32F4.I am analyzing the cause and have a question regarding this.The processor I am using is STM32F469NI. There is a specific operation that it freezes at, and when...

devchang · 2024-08-15

You were right. It works well after making that change. Thank you!

devchang · 2024-06-03

Thank you, that was very helpful.Actually, the ORE was not being cleared when the USART interrupt occurred, so I think it was going around the interrupt loop infinitely. So I guess at a time when EXTIs with the same priority occur frequently, there i...

User statistics

User Activity

DMA operation occasionally stops during the burst transfer of data from external SDRAM to eMMC via DMA

UART reception using DMA: received data not being updated in the memory buffer

Can a large number of different interrupts of the same priority on the STM32F4 cause problems?

Re: During UART RX reception using DMA, the received data is not being updated in the memory buffer connected to the DMA.

Re: Can a large number of different interrupts of the same priority on the STM32F4 cause problems?