STM32 MCUs Embedded software

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STM32 Usb Mass Storage EJECT issue

I have Usb Mass Storage working well on my custom board device featuring an STM32F469AIH6 and an eMMC (SDINBDG4-8G). I can connect to either a Mac or Windows machine and the device shows up in the Finder/Explorer and you can read/write files just fi...

Craig B by Associate II
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Pin initialization defect on Nucleo F767ZI

In LwIP HTTP server demo, ethernetif.c, HAL_ETH_MspInit():...  /* Output HSE clock (25MHz) on MCO pin (PA8) to clock the PHY */  HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_PLLCLK, RCC_MCODIV_4);...According to the schematic, this pin is the USB SOF i...

Sean1 by Associate II
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PLL initialization defect on Nucleo F767ZI

In main.c, SystemClock_Config(), the PLL is set up as follows:... RCC_OscInitStruct.PLL.PLLM = 25; RCC_OscInitStruct.PLL.PLLN = 400;  ... RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;...The implication is that the clock is 25MHz, and being divided down...

Sean1 by Associate II
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STM32F105 USB Device not detected on PC

I have generated USB CDC code using STM32CubeMX with firmware 1.7.0. When I run the code, nothing is detected on the PC. I have disabled VBUS sensing and made sure USB peripheral Clock is enabled. I am using external 25MHz crystal and verified by PL...

fm by Associate II
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