About fing

fing · 2024-05-21

Hello,I have been working on a project that requires USB communication with an STM32 MCU. Unfortunately, the computer cannot recognize the device.On the hardware side, I am using the STM32H725VGT6 mcu, an isolator, and a USB-C connector with some ESD...

fing · 2024-05-08

Hello,I have designed and assembled a SMPS based on the EVAL-STCH03-45W evaluation board. What I have noticed, is that the power supply is outputting 1 Hz pulses with short buzzing sounds. These symptoms usually mean the hiccup mode is activated. How...

fing · 2024-02-24

Hello,I have designed a PCB with 3 STM32H725VGT6 MCUs, and assembled them according to my schematic:(sorry for this resolution, this is from a converted pdf)All 3 MCUs are the same, from this schematic.R5 and R2 are just 0R jumpers to select the boo...

fing · 2024-02-04

Hello,I have implemented 4 wire SPI for my SSD1362 OLED controller. Here are my SPI transfer functions (both normal and DMA) void HAL_SPI_TxCpltCallback(SPI_HandleTypeDef *hspi) { // Deselect when Tx Complete if (hspi == &hspi1) { HAL_GPIO_WriteP...

fing · 2024-01-16

Hello,I would like to know whether I understood the application note about the Vcap pins correctly. If there are 3 Vcap pins on the package, then 2 capacitors should be placed and one has to be connected to another. I'm not sure about this connection...

fing · 2024-05-23

After resoldering every pin D+, D- on the high and low side, it is working properly. If you are not using 48 MHz for the clock, Windows won't recognize the device descriptor, so in my case I used the HSI 48 MHz in the MUX. USB is now working correctl...

fing · 2024-02-29

Update: After some investigation, I found that the main source of the problem was actually caused by incorrect settings in the .ioc file. These are the correct settings for LDO operation.I can only upload these incorrect settings once. After that, th...

fing · 2024-02-26

Yes, it actually follows the LDO operation, where VDDLDO = VDD. They are powered externally with a power supply giving 3.3 V.

fing · 2024-02-26

Yes, JLCPCB made the boards and they passed the flying probe test. VDD-GND: 3.998 kΩMCU1 (which has 1.0008 V on Vcap):VCAP-GND (2.2 uF connected to pin 97): 18.10 kΩVCAP-GND (2.2 uF connected to pin 44): 18.09 kΩMCU2:VCAP-GND (2.2 uF connected to pin...

fing · 2024-02-24

Hi, Thank you for the answer, is it possible to do this in a non-blocking way?

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STM32H725 USB FS PHY not detected

SMPS Pulsing in hiccup mode

STM32 VCAP pin problem

STM32F446 SPI DMA too fast for SSD1362

STM32H725 Vcap pins

Re: STM32H725 USB FS PHY not detected

Re: STM32 VCAP pin problem

Re: STM32 VCAP pin problem

Re: STM32 VCAP pin problem

Re: STM32F446 SPI DMA too fast for SSD1362