About Evgeny Sobolev

Evgeny Sobolev · 2019-12-02

Setup:Project, generated by CubeMX and compiled by arm-none-eabi-gcc-9.2.0 toolchain. CubeMX firmware package version: STM32Cube FW_L4 V1.14.0CPU: STM32L432KCY (and others)Toolchain: arm-none-eabi-gcc-9.2.0 (and others)Compiler options: -mcpu=cortex...

Evgeny Sobolev · 2019-06-18

I used latest CubeMX version and found another one bug in stm32l4xx_ll_usb.c generated by it. If you will compile code using "-O3" optimization level, function USB_WritePMA will not work properly. /** * @brief Copy a buffer from user memory area to ...

Evgeny Sobolev · 2019-01-25

There bug in STM HAL Lib generated by cube mx. Problem: I am using usb communication on STM32L433. I have high speed traffic both direction on the same endpoint. USB is stopped in one of the direction, and doesn't transmit/receive data any more.Why:I...

Evgeny Sobolev · 2019-01-25

Hello. I am using USB interface on STM32F746ZGT device (HAL lib, usb device mode). USB zero length packets are supproted and used by our protocol implementation on endpoint 1. It works on STM32L433, STM32F407, STM32F446 controllers. But it doesn't wo...

Evgeny Sobolev · 2018-09-21

Hello. I am using STM32F407VG controller. I have to transfer data from another device via SPI interface. STM32 SPI is used in slave mode, circular DMA enabled. Devices are connected via joint.In some cases I need to resynchronize data exchange. At th...

Evgeny Sobolev · 2019-12-02

Please don't forget to fix it on another controller families.Thanks.

Evgeny Sobolev · 2019-01-30

Hello!-Which OTG module did you use? Do you use the internal PHY?I tried to use both of the modules and had the same problem. Fix was tested on the both interfaces. -Which OTG module did you use? Do you use the internal PHY?Internal PHY-Do you purge ...

Evgeny Sobolev · 2019-01-28

So, I found the solution. Accroding to datasheet I should:Set transfer size[EPNUM] = 0Set packet count[EPNUM] = 1, and say "transfer" by writing USBx_INEP(epnum)->DIEPCTL |= USB_OTG_DIEPCTL_EPENA | USB_OTG_DIEPCTL_CNAK; But really you should write so...

Evgeny Sobolev · 2019-01-26

Is anybody knows is it bug of hardware or HAL software? How to resolve it? May be company had extended version of datasheet (reference manual)?According to reference manual RM0385 Rev 8, page 1514-1515 – To transmit a single zero-length data packet:T...

Evgeny Sobolev · 2019-01-25

PCD_CLEAR_TX_EP_CTR should clear USB_EP_CTR_TX flag only by writing zero there, but sometimes it clears USB_EP_CTR_RX flag. That is why I append "_wRegVal |= USB_EP_CTR_RX" into the macro. According to datasheet USB_EP_CTR_RX can be cleared by writi...

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STM32F4xx USB bug, when compiled by GCC using -O3 option.

STM32L4xx HAL Library USB bug. Function USB_WritePMA does not work properly when compiled with "-O3" option.

STM32L433 USB transmit & received at the same time HAL lib bug.

USB on STM32F746ZGT and zero length packet (ZLP) on endpoint 1. ZLP not transmitted.

How to clear internal SPI TX buffer in slave mode after transaction cancellation? SPI used in slave mode with DMA circular buffer.

Re: STM32F4xx USB bug, when compiled by GCC using -O3 option.

Re: USB on STM32F746ZGT and zero length packet (ZLP) on endpoint 1. ZLP not transmitted.

Re: USB on STM32F746ZGT and zero length packet (ZLP) on endpoint 1. ZLP not transmitted.

Re: USB on STM32F746ZGT and zero length packet (ZLP) on endpoint 1. ZLP not transmitted.

Re: STM32L433 USB transmit & received at the same time HAL lib bug.