About Chao

Chao · 2024-11-21

Hi,Recently, the CubeIDE reports these Semantic Errors when I build my project that has worked for months, I can't exactly remember what I had done when I first saw these errors, most likely because an SPI Flash was added into the hardware system an...

Chao · 2024-09-05

Hi,I have a bootloader for my application, at the moment they exchange their working status by flash write. I think a better way is to declare a variable in RAM with the same address in both bootloader and application. Someone mentioned, in a post, t...

Chao · 2024-09-03

Hi,I am trying to make the jump work with an F103RC, and have read many posts in this community, but the jump simply does not work for me. The jump code is mainly from DavidNaviaux in the following post:https://community.st.com/t5/stm32-mcus-products...

Chao · 2024-08-06

Hi,Recently, we desighed a test board with STM32F103RB for UART communication with a wireless chip, and we found that the HAL_UART_ErrorCallback is triggered occasionally (the periods of errors vary betweent tens of minutes to hundreds of minutes), t...

Chao · 2024-04-16

Hi,I started a post a week ago (https://community.st.com/t5/stm32cubemx-mcus/software-reset-fails-in-eth-configuration-for-lwip-with-f407/td-p/659641) that has been viewed over 60 times without any reply, for finding a solution for this issue, I woul...

Chao · 2024-11-21

Chao · 2024-09-09

Using the first 4 bytes is a very nice solution. The last question is: does the SRAM start at 0x20000000 for all STM32 MCUs ?

Chao · 2024-09-08

there is one thing I don't understand: the largest address of the SRAM in F103RC should be 0x2000BFFF, but _estack = 0x2000C000 in the linker script, so I set _estack = 0x2000C000 - 4 = 0x2000BFFC, if I set the COMMON_VAR_ADDRESS to one that is great...

Chao · 2024-09-08

Hi @SofLit ,For the first case (using the linker), I read the doc you suggested, it's all about the use of CCM, and I checked the reference manuals of F103 and F407, and found F103 doesn't have CCM though F407 has 64KB CCM.For the second example (usi...

Chao · 2024-09-07

Many thanks to @SofLit and @MM..1 .Is the way given in the example safe? How could we be sure that the variable value would not be modified by other part of the bootloader code and app code? The both code are written in C++.

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Symbol '_NVIC_PRIO_BITS' and Type 'IRQn_Type' could not be resolved in core_sc300.h

How to Use a Variable in SRAM to Communicate between Bootloader and Application

Help to Make Jump from Bootloader to Application Work

How to Reset an UART after an error

Help on workflow for the software reset in ETH configuration

Re: Symbol '_NVIC_PRIO_BITS' and Type 'IRQn_Type' could not be resolved in core_sc300.h

Re: How to Use a Variable in SRAM to Communicate between Bootloader and Application

Re: How to Use a Variable in SRAM to Communicate between Bootloader and Application

Re: How to Use a Variable in SRAM to Communicate between Bootloader and Application

Re: How to Use a Variable in SRAM to Communicate between Bootloader and Application