About Johannes

Johannes · 2023-09-15

Hi EveryoneI use STM32G474RE with CubeIDE 1.13.1 and MCU Package G4 V1.5.1I have a problem, when an I2C_MEM_READ_IT encounters a NAK on the memory address. A typical I2C mem read is: Start DevAdr(W) (Ack) MemoryAdr (Ack) RepeatedStart DevAdr(R) data(...

Johannes · 2023-09-12

Hello EveryoneI am struggling to get STM32G474 FDCAN working, especially error handling. Normal transmission works fine. I use TXQueue (not TXFifo) mode. I can write messages to each of the 3 message buffers. Messages are sent, I get a Transmit Occur...

Johannes · 2023-05-26

Hello Everyone:I use azure RTOS USBX storage (MSC) and FileX.. My STM32H735 acts as a USB storage device using a RAM-Disk. I have FileX running, which allows me to add files to the RAM-Disk from inside the STM32H735Problem: Windows caches the content...

Johannes · 2023-05-11

Hello everyoneDoes anyone have example code for Azure RTOS USBX device class video (UVC)?I was able to add Video to my USBX demo application on Nucleo H7A3There was sample code for CDC_ACM and MSC (mass storage), this worked fine. But for device clas...

Johannes · 2023-05-05

Hello Everyone I am trying to make AzureRTOS USBX CDC ACM work on my Nucelo H7A3ZI I am thrilled that CubeIDE now allows to select Packages like AzureRTOS_H7. I was quite successful. ThreadX is running fine. I was able to enable USBX Device CDC ACM...

Johannes · 2023-10-08

Unfortunately I have not solved the the issue. I use a workaround for now. I set the system to "auto retry". Messages in the transmit mailboxes are not dropped and the system tries to send them out indefinitvely. Once the bus comes back to life, the ...

Johannes · 2023-09-22

Hi FouedSorry, if I am confused? Yes for sure, I should use the correct sub address. But what if an i2c or smbus communication is disturbed and one byte during communication is NAKed ? This is a legit scenario. I just have to accept, that the HAL dri...

Johannes · 2023-09-18

Hello FouedThank you for helping me. I attached the code. It is a very basic CubeIDE project which uses I2C3. It has a very simple loop in main.c which tries to do a mem read on 0x14 adr 0x12 every 500ms The i2c blocks after two attempts. First read ...

Johannes · 2023-09-15

Hello AnonAs I recall, on the STM32G4 the TX Buffers are fixed to 3 (hardware). It cannot be changed

Johannes · 2023-07-26

I have similar struggels with the documentation. What is the difference between FIFO and Queue? I assume that queue is equal to "buffers". you can put 3 messages into these buffers and they are processed according their priority. There is a HAL funct...

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HAL_I2C_MEM_READ_IT fails if a NAK occurs on the memory address

STM32G474 FDCAN TX buffer cancellation finish IRQ does not trigger

Azure USBX storage / fileX / ramdisk: how to make windows reload the content of the device?

Example for Azure RTOS USBX device video (UVC)

Nucleo STM32H7A3, AzureRTOS_H7, USBX CDC_ACM generation by CubeIDE 1.12 incomplete.

Re: STM32G474 FDCAN TX buffer cancellation finish IRQ does not trigger

Re: HAL_I2C_MEM_READ_IT fails if a NAK occurs on the memory address

Re: HAL_I2C_MEM_READ_IT fails if a NAK occurs on the memory address

Re: STM32G474 FDCAN tx buffers

Re: STM32G474 FDCAN tx buffers