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Stanford · 2023-08-28

I've setup my STM32L475 non-RTOS as a USB HID Host to interface with a barcode scanner. All works well if I call sdf MX_USB_HOST_Process in my main application loop with no delays. However, if MX_USB_HOST_Process is not called fast enough, characte...

Stanford · 2023-06-12

Running v1.12.1 of STM32CubeIDE. I noticed that the OTG SFRs are not showing up for the STM32L475. They do show up for an STM32L476. Does anyone know how I can fix this? thanks

Stanford · 2023-06-10

Here's how I implemented a custom bootloader using the STM32L475. I thought I would share since I have seen so many posts from people having issues invoking their application from their bootloader.I attempted to post this as an idea in the knowledg...

Stanford · 2023-08-28

I discovered the same problem. My STM32L4 is acting as a HID host to a barcode scanner. MX_USB_HOST_Process is called in my main loop. Since the main loop exceeds the ~1ms SOF period, the state handling in MX_USB_HOST_Process never enters the USBH...

Stanford · 2023-08-27

I also see this issue ("Data mismatch found at address....") in STM32CubeProgrammer. To prevent this, I perform a Hardware Reset followed by a Halt of the CPU before downloading. Do the following in STM32CubeProgrammer:Click on the CPU tab.Click th...

Stanford · 2023-08-27

@gbm - I agree w/you. Thanks for the response to this. Another way of writing the interrupt clearing loop: for (i = 0; i < sizeof(NVIC->ICER) / sizeof(NVIC->ICER[0]); i++) { NVIC->ICER[i] = 0xFFFFFFFF; NVIC->ICPR[i] = 0xFFFFFFFF...

Stanford · 2023-06-12

Thank you very much. This worked for me.

Stanford · 2023-05-10

This also my experience of HAL_UARTEx_RxEventCallback. It always sends in a value of 1…Size (ie, if Size of buffer is 256 bytes, then the values are 1…256, never sends in a size value of 0). This is ok since my callback is a single line:int tail, hea...

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USB HID Host MX_USB_HOST_Process Call

OTG SFRs not showing up in STM32CubeIDE for STM32L475

Custom bootloader on the STM32L4

Re: How to call MX_USB_HOST_Process() on HID host projects with large main loop?

Re: STM32CubeIDE v1.8.0 flashing error: Data mismatch found at address

Re: How to jump to system bootloader from application code on STM32 microcontrollers

Re: OTG SFRs not showing up in STM32CubeIDE for STM32L475

Re: Issues using HAL_UARTEx_ReceiveToIdle_DMA(...) and HAL_UARTEx_RxEventCallback(...)