About JMein.1

JMein.1 · 2023-01-25

Hello community,we have the problem, that we need more code space for the M4 application and try now to get code area in SRAM2 (IPC area). What we've done so far:Decreased the number of vring buffers to the half: #define VRING_NUM_BUFFS 8 /* number o...

JMein.1 · 2023-01-13

Hello community,the errata says (in combination with the missfunciton of the delay block), that only modes up to DDR50 can be used with the STM32MP1xx.Actually we now have the problem, that writing to the SD card works well but the reading through th...

JMein.1 · 2022-08-04

Hello,actually, our processor STM32MP153 (dual core) is completely full with the "normal" memory regions regarding the MCUs (M4) code and data. So now, we decided to add the RETRAM_data form ORIGIN = 0x00001000, LENGTH = 0x0000F000 /*60k*/The linker ...

JMein.1 · 2021-10-15

Hello,we are working on the ST32MP1. The SPI3 works fine with the CubeMX software combining the DMA2 and FIFO when the board works in engineering mode. But if I perform the same software loaded by Linux (rproc start), the DMA2 SPI stream stops worki...

JMein.1 · 2021-08-27

After reading most of the topics concerning my question and not finding an answer, which solves our problem, here my describtion:We are currently integrating OpenAMP in our Application. For now, we are using the configuration from the OpenAMP_TTY_ech...

JMein.1 · 2023-02-13

Hello Olivier,we now managed to decrease the DMA buffers and to link M4 code in that area.Still one question is open regarding the vdev OpenAMP buffers.Did you get in the meantime some more information that might help us?Best regards,Jan-Otto>>Furthe...

JMein.1 · 2023-02-02

Hello Olivier,ok, we are using Linux with DMA but I am not sure, if we are using the "chained" mode in combination with MDMA. CubeMX looks like this. So in the article of the WIKI if find only the DMA buffers to be removed:&sram { dma_pool: dma_p...

JMein.1 · 2023-02-02

Hello Olivier,sorry, I thought I removed the typo. I mean SRAM3 @0x10040000. Yes, we actually use now 360 KBytes and want to find out, how much IPC RAM we can take from the A7/M4 buffers without damaging the communication channels we use togehter wit...

JMein.1 · 2023-02-01

Hello Patrick,all the level shifter available on the market are auto-direction level shifter like NXS0506UP is the replacement for the IP4856CX25 used on your eval board STM32MP157F-EV1.Is there an replacement board from ST which is working fine in c...

JMein.1 · 2023-01-31

Hello community,actually, we still need here some help. Our problem is, that the ST Wiki describes only, how to completely remove areas to have them free for code but there is no explicit example how to reduce areas used by Linux in a correct way.Loo...

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Decrease the size of the IPC buffer and put M4 code in this

SD card reading not working correctly on STM32MP1 during 512 byte read with level shifter

SPI + DMA is not working with variables placed inside RETRAM

DMA2 breaks SPI3 communication when performing under Linux context.

OpenAMP u-boot startup

Re: Decrease the size of the IPC buffer and put M4 code in this

Re: Decrease the size of the IPC buffer and put M4 code in this

Re: Decrease the size of the IPC buffer and put M4 code in this

Re: SD card reading not working correctly on STM32MP1 during 512 byte read with level shifter

Re: Decrease the size of the IPC buffer and put M4 code in this