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2019-08-01

Excuse me.Can I change COM Port of name in keil C ?if there is no way , how to change it name ?

2019-05-22

I have bootloader initial position 0x08000000 and IAP 0x08004000 now.First, I form bootloader jump to IAP code and it works fine.But my jump back to bootloader will stop.Maybe I have a lot of IAP function enable.So I want to ask, besides __disable...

2019-05-16

Hi all,I am now experiencing problems with USB stuck.I am using an STM32L433CC MCU.There are two blocks in Flash, one is Bootloader and the other is API code.Mainly at the beginning I entered the bootloader and can clearly know that USB can work.Also...

2019-05-09

My board is STM32L433CCBut I have a question, I can plug and reconnect to the PC in USB, but I think it is too much trouble and take time.Is there any way to reconnect without pulling the USB cable PC?

2019-03-18

My board is STM32f072BBut I have a question, I can plug and reconnect to the PC in USB, but I think it is too much trouble and take time.Is there any way to reconnect without pulling the USB cable PC?

2019-08-01

Path: C:\Program Files (x86)\STMicroelectronics\Software\Virtual comport driver\Win7I found .INF file and change DESCRIPTION define .But I renewed to install , result it failureIt seem have Anti-write mechanism.How can I solve this problem?

2019-05-23

I refer to the URL provided by Alex: How to write a bootloaderBefore the jump,first you must Disable all enabled interrupts in NVIC. code : NVIC->ICER[ 0~7 ] = 0xFFFFFFFF ;After Disable SysTick and clear its exception pending bit, if it is used in...

2019-05-22

Thank you, the problem has been solved.

2019-05-09

I found that there are newer issues, old style I re-Deinit(), in init(), I went into debug modeFound his card USB_DevInit() this function inside,Mainly he has to doUSBx->CNTR = USB_CNTR_FRES;USBx->CNTR = 0;When doing CNTR = 0, the error occurs direct...

2019-05-09

I now have USB_DP and USB_DM have a design mini usb headBut my VDDUSB also has 3.3VIf I internal pull up, will he still continue to operate?

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How to change USB COM Port of name ?

How to use stm32l4 from IAP jump to bootloader

STM32L4 CDC handler

How does USB reconnect with the PC without pull USB line?

How does USB reconnect with the PC without being pulled out?

Re: How to change USB COM Port of name ?

Re: How to use stm32l4 from IAP jump to bootloader

Re: How to use stm32l4 from IAP jump to bootloader

Re: How does USB reconnect with the PC without pull USB line?

Re: How does USB reconnect with the PC without pull USB line?