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xhan.11 · 2023-04-23

HI: Due to special needs, the system clock frequency needs to be changed during work, switching between 72M and 48M. Using STM32F103, the USB CDC Virtual COM Port cannot function properly after switching the clock.Using STM32F407 to dynamically chang...

xhan.11 · 2022-04-18

Hi：STM32F103VBTx STM32CubeMX_v5-3-0The basic code is generated by cube.There are the following changes:static int8_t CDC_Receive_FS(uint8_t* Buf, uint32_t *Len){ /* USER CODE BEGIN 6 */ CDC_rx_len += *Len;//pinjie USBD_CDC_SetRxBuffer(&hUsb...

xhan.11 · 2021-12-26

HI： STM32F103 STM32CUBEMX V4.25.1 As shown in the figure, I read one byte in 1line mode, but sent five bytes, four more than I wanted.thanks

xhan.11 · 2021-12-26

STM32F103STM32CUBEMX V4.25.1The slave device on my side is a fake PP output. It needs a pull-up resistor. I know this is not in accordance with the SPI agreement, but there is no way. When I run the HAL_SPI_Transmit() function, an incorrect pull-up s...

xhan.11 · 2022-04-19

It has been solved. The reason is that the crosstalk to the ground is too large at the moment when the RF switch is turned off.

xhan.11 · 2022-04-18

updateSTM32 link a TPL7407（30-V, 7-ch NMOS array low-side driver）control 87106B(24V RF switch）This phenomenon will not occur when I do not connect the RF switch or fully open the RF switch

xhan.11 · 2021-12-27

wow�?�?�?Solved�?�?�?thanks very very much�?�?�?__HAL_SPI_ENABLE(&hspi1);This command is added to the initialization function, and the problem is solved.

xhan.11 · 2021-12-27

Thank you for your replyMy slave device is a fake PP output. So it must have a pull-up resistor,include SCLK MOSI MISO CSB.The second transmission has no wrong clock signal.Never again./* SPI1 init function */static void MX_SPI1_Init(void){ /* SPI...

xhan.11 · 2021-12-27

My slave device is a fake PP output. So it must have a pull-up resistor.>1,Only the first signal after initialization appears .It won't happen againInitialization was completed at startup. This time has been initialized. So there should not be no dr...

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How to correctly change the system clock frequency during work？

STM32F103VBTx GPIOC pin3 Pulling up first and then down will result in failure to receive CDC data within 100ms,Probabilistic

HAL_SPI SPI_DIRECTION_1LINE mode Send 4 more cycles

Hal_SPI will be an Open Drain output will appear in the first cycle of initialization

Re: STM32F103VBTx GPIOC pin3 Pulling up first and then down will result in failure to receive CDC data within 100ms,Probabilistic

Re: STM32F103VBTx GPIOC pin3 Pulling up first and then down will result in failure to receive CDC data within 100ms,Probabilistic

Re: Hal_SPI will be an Open Drain output will appear in the first cycle of initialization

Re: Hal_SPI will be an Open Drain output will appear in the first cycle of initialization

Re: Hal_SPI will be an Open Drain output will appear in the first cycle of initialization