About DOsbo

DOsbo · 2022-09-13

Hi All,I have a STM32H7 master communicating with I2C to 4 STM32F0 slaves. The I2C uses DMA but intermittently stalls when the master is transmitting to a slave. It sends the address and the first data byte successfully (acknowledged), but then fai...

DOsbo · 2021-02-22

Hi All,With CMSIS V1 the default priority for the FreeRTOS Timer Task is set to 2. In CMSIS V1 that is the highest priority for a thread (low numbers = high priority). In CMSIS V2 the priority scheme was reversed (high numbers = high priority). Ho...

DOsbo · 2021-02-16

Hi All,In a hardware architecture where there are multiple I2C slaves running the same code base, each slave must determine their own address. The code generated by Stm32Cube hard codes the OwnAddress so it is impossible to insert a unique address in...

DOsbo · 2021-01-24

In STM32CubeMX (6.1.0) for STM32H7 the I2C parameter settings allow you to enable Custom Timing. However, the Timing parameter still remains disabled and cannot be set. I would expect that for custom timing, the user could change the Timing paramete...

DOsbo · 2020-09-30

I have a bootstrap in internal FLASH that configures the FMC driver to setup external FLASH and SDRAM. After setting them up it jumps to the application stored in external FLASH and executes it from there. The application also needs to use the FMC ...

DOsbo · 2022-10-05

Hi @F.Belaid,The issue has been fixed. The root cause was a defect in the STM32H743 silicon. The defect is included in the errata of other microprocessors, but not in the STM32H743 errata. However, STM has confirmed the STM32H743 does contain the...

DOsbo · 2022-09-14

Hi Piranha, we are still using your ethernet driver (thanks for that). As a side questions, do you know if it is safe to move back to v1.10 or does it still have issues?CheersDavid

DOsbo · 2022-09-14

Hi Pavel, we've just encountered an I2C/DMA issue with our STM32H743. It transmits the address and the first data byte successfully (both acked), but fails to transmit the 2nd data byte. There is no error generated and the i2c clock remains low. T...

DOsbo · 2021-02-24

I did change the timer task priority to 55 and my high priority tasks immediately got a 15% performance boost and latencies dropped from seconds down to a few milliseconds.However, lets face it, most devs will accept the default value of 2.

DOsbo · 2021-02-23

Sorry you're right, FreeRTOS creates the timer task and hasn't got anything to do with CMSIS. That just means the timer task priority has been wrong from the start. This scenario fails because of the timer task low priorityvoid interrupt() { xEve...

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User Activity

I2C using DMA intermittently stalls

Unwise default for FreeRTOS Timer Task Priority. ST Employees might want to read this.

I2C Feature Request: Please don't hardcode OwnAddress.

STM32CubeMX STM32H7 I2C Custom Timing not so Custom.

STM32CubeMX: Feature request - Include a HAL driver, but don't configure it. (please)

Re: I2C using DMA intermittently stalls

Re: Ethernet communication and LwIP failed after some time (15-20mins). STM32H747

Re: I2C erratum for STM32H7 - does it apply to STM32H753?

Re: Unwise default for FreeRTOS Timer Task Priority. ST Employees might want to read this.

Re: Unwise default for FreeRTOS Timer Task Priority. ST Employees might want to read this.