About MElha.1

MElha.1 · 2020-11-23

Hello,I am using stm32mp157c-dk2 board and working on "How to exchange large data buffers with the coprocessor - example" from the wiki:https://wiki.st.com/stm32mpu/wiki/How_to_exchange_large_data_buffers_with_the_coprocessor_-_exampleI need to do so...

MElha.1 · 2020-04-28

Hello,I am working on a project that acquires ADC readings and saves them into a buffer in the M4 side of STM32mp157 chip on DK2 board, now I need to build a kernel module that copies the saved buffer from the SRAM to DDR on the A7 side when a certai...

MElha.1 · 2021-01-17

Thanks Christophe for your reply,I am using "How to exchange large data buffers with the coprocessor" example as a guide to build another project, it is similar to the example in many points but it will run on a board that doesn't have an LCD and the...

MElha.1 · 2020-06-29

Hi Oliver,Yes I allocated both DMA0 and DMA1 to M4 context, one DMA is used to transfer data from the GPIO to SRAM, and the other is used to transfer the data from the SRAM to DDR, now I have a maximum speed of 160 MB/s for the transfer from the SRAM...

MElha.1 · 2020-06-25

Hi Oliver,Thank you very much for your fast reply. After reading your reply and knowing that 65MB/s is achievable, I optimized the DMA configuration and that made me reach about 60MB/s and I then discovered that the real bottle neck in the example a...

MElha.1 · 2020-06-19

I have been working on this topic for a while and the "How to exchange large data buffers with coprocessor" example helped me a lot, I modified both the M4 firmware and the linux application to suit my needs but now I am stuck again figuring out the...

MElha.1 · 2020-05-03

That seems to be very helpful, thank you very much Oliver.The example is based on the distribution package which I didn't use before, so I am working on it and will give you a feedback if I have any further problems or questions.. thanks again.M. Elh...

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How to transfer data from the SRAM to the DDR in a kernel module?

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