About LLawr.1

LLawr.1 · 2024-07-19

I have a product that contains 2 STM32F405/07/15/17 series MCUs. There are 2 because we need 4 CAN and that's cheaper and easier than finding a 4 CAN MCU. Anyways, the main MCU is connected to the secondary MCU via UART and the boot/reset pins so tha...

LLawr.1 · 2022-10-17

I am using an 8MHz crystal HSE, and the application (MBED) is able to use CAN, USB, UART, etc properly, so the timing for the HSE is setup correctly. When I try to use the HSE as a source for MCO1 or MCO2 however, it does not work, I get no output. I...

LLawr.1 · 2022-07-25

I am trying to use the Mbed USBSerial class on an STM32F767VI and it works fine. I also have CAN3 RX setup on pin PA8 (USB SOF) and a GPIO on PA10 (USB ID). I am not using the SOF or ID functionality, but initializing the USB makes it so those pins d...

LLawr.1 · 2022-04-22

I want to use the factory USB DFU bootloader for production programming. I have set BOOT0 to 1 and BOOT1 to 0, powered on the board, and plugged in the USB, and in device manager I get an unknown device (device descriptor request failed). I am not su...

LLawr.1 · 2022-02-09

LLawr.1 · 2022-10-17

HSE was in fact not starting and falling back to HSI without a crash as I was accustomed to with other STM targets using MBED. Changed the load capacitors to 10pF from 15pF and it started. Not sure why that would be an issue now as I have other produ...

LLawr.1 · 2022-10-17

Actually no that is correct, I had assumed the clock setup worked the same as a different F7 target we have, where it will crash if the clock setup fails, but it is failing to start the HSE and then falling back on the HSI, I will look into that

LLawr.1 · 2022-10-17

int main(){ RCC_OscInitTypeDef config; HAL_RCC_GetOscConfig(&config); printf("$INFO: %d\r\n", config.HSEState);}That code gives me a result of 0, which makes no sense because the rest of the program works fine, and it would not work at all i...

LLawr.1 · 2022-07-27

So in the Mbed USBPhy_STM32.cpp file, there is this code that initializes the pins:while (map->pin != NC) { pin_function(map->pin, map->function); map++; }This takes all of the pins that are in the pinmap for the USB and initializ...

LLawr.1 · 2022-07-26

Yeah Mbed is more or less a wrapper for the CubeMX generated code from what I can tell. I've been digging around in the driver code and the MCU manual but I am having no luck finding anything about disabling the USB ID/SOF functionality. The HAL_PCD_...

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STM32F407 MCO with HSE source no output

STM32F7 USB SOF and ID Disable/Reuse (Mbed)

STM32F407ZG USB DFU Device Descriptor Request Failed

Is it possible to change the name that the STLINK-V3MODS shows in windows explorer to something other than STLINK_V3P?

Re: STM32F407 MCO with HSE source no output

Re: STM32F407 MCO with HSE source no output

Re: STM32F407 MCO with HSE source no output

Re: STM32F7 USB SOF and ID Disable/Reuse (Mbed)

Re: STM32F7 USB SOF and ID Disable/Reuse (Mbed)