About CDew.1

CDew.1 · 2024-05-17

I have a self-powered device. It appears as a USB CDC device /dev/ttyACM0, when plugged into a Linux host. The device port is wired to USB_VBUS, so that pin will only be high when connected to a USB host.I would like to detect the presence of the U...

CDew.1 · 2020-06-19

The code compiles and works on the Nucleo H743ZI2.The contents of the Debug directory are:$ ls -lA Debug/total 3132drwxrwxr-x 4 chris chris 4096 Jun 19 11:51 Coredrwxrwxr-x 3 chris chris 4096 Jun 19 11:51 Drivers-rwxrwxr-x 1 chris chris 30384 Ju...

CDew.1 · 2020-06-18

Serial port interrupts are firing continuously, so that the application code does not run.I'm using an STM32H743, on the Nucleo board.Initially, USART3 worked properly for a few weeks, then failed in this manner. I then moved to USART1, which worked...

CDew.1 · 2020-03-23

I have the following code, which is *almost* always working. (It typically gets stuck after 10-100K characters.)void USART3_IRQHandler(void) { if (LL_USART_IsActiveFlag_TXE(USART3)) { stats.txe++; if (LL_USART_IsEnabledIT_TXE(USART3)) { LL_US...

CDew.1 · 2020-03-11

I've generated a STM32F429I-DISCO project using CubeIDE's CubeMX.I've added the X-CUBE-TOUCHGFX 4.13.0 software to the project, under Additional Software.By changing LTDC and FMC settings, I was able to configure X-CUBE-TOUCHGFX successfully.The proj...

CDew.1 · 2024-05-20

More neatly: #define USB_OTG_FS_VBUS_GPIO_Port PMU_LED_PWR_GPIO_Port#define USB_OTG_FS_VBUS_Pin (PMU_LED_PWR_Pin >> 1) int usb_plugged_in = HAL_GPIO_ReadPin(USB_OTG_FS_VBUS_GPIO_Port, USB_OTG_FS_VBUS_Pin); where PMU_LED_PWR is the name of PA10.

CDew.1 · 2024-05-20

I've found a solution:int usb_plugged_in = HAL_GPIO_ReadPin(PMU_LED_PWR_GPIO_Port, PMU_LED_PWR_Pin / 2);where PMU_LED_PWR is the name of PA10. PA9 is on the same port as PA10 and its pin mask is right-shifted. i.e. Setting PA9 to the role of USB_OTG...

CDew.1 · 2024-05-20

Thanks for your reply. My self-powered device is always USB device and never a host.I currently have PA9 configured as USB_OTG_FS_VBUS.- Will USB (device) continue to work if I change PA9 to a GPIO_Input?- Or do I need to rework the board to route V...

CDew.1 · 2020-06-18

Using LL_USART_EnableLIN(USART1);causes the SBK flag not to be set when interrupts do fire, and causes interrupts to not be continuous.

CDew.1 · 2020-06-18

@berendi I just tested it with RX pulled high through 10K, and the errors stop.So you're right about grounding RX causing errors.But why does grounding RX cause continuous errors, and how can that be stopped?

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Re: How to sleep when USB_VBUS on stm32f105 is low?

Re: How to sleep when USB_VBUS on stm32f105 is low?

Re: How to sleep when USB_VBUS on stm32f105 is low?

Re: Serial interrupts call USART1_IRQHandler() continuously, how do I slow or stop them so that the application code can run?

Re: Serial interrupts call USART1_IRQHandler() continuously, how do I slow or stop them so that the application code can run?