About Chao

Chao · 2025-01-14

Hi, My application has a bootloader, recently, I allocated a large block of memory on top of SRAM to protect the data from system resets, this causes the highest address of user stack changes, when this highest addresses of user stack are different i...

Chao · 2025-01-09

Hi,I am trying to use IWDG to function as a 5s timer, IWDG is reloaded every second. In order to test the functionality, I just activated it with default parameters of PRESCALER=4 RELOAD VALUE=4095, and I did nothing else (no refreshing the timer), w...

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 · 2025-01-14

My previous test was invalid.I checked the device memory in CubeProgrammer, the value of the first address of App was already set by the linker to 0x08008700 in the bin file according to the settings in .LD file.

Chao · 2025-01-14

Hi @waclawek.jan ,Thanks!The Bootloader code is mainly contributed by @gbm :struct app_vectable_ { uint32_t Initial_SP; void (*Reset_Handler)(void); }; #define APPVTAB ((struct app_vectable_ *)APP_ADDR) #define APP_ADDR 0x08014000 void Boo...

Chao · 2025-01-14

Hi @gbm ,Thanks!Yes, indeed. I tested this, it works. But the problem is, if I choose to do it this way, we have to upgrade the bootloader for all products already delivered to customers. I am looking for a way to make it work without a need to upgra...

Chao · 2025-01-10

Hi @Tesla DeLorean ,The NRST and LSE circuit in our application is as below:Signal RESET is routed to NRST Pin. Signal O_IN32 and O_OUT32 are routed to OSC32_IN and OSC32_OUT, and they are not routed to anywhere else. RegardsChao

Chao · 2025-01-09

Hi @TDK ,Thanks for your reply!I did do debugging, and could step through the Init code with HAL_IWDG_Init(&hiwdg) returns HAL_OK but my code runs as if the IWDG didn't exist:I didn't refresh the counter and code runs as usual. The IWDG is a new func...

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How to Modify the Address of Stack

IWDG Doesn't Reset Without Refreshing with F103RC

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

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Re: How to Modify the Address of Stack

Re: How to Modify the Address of Stack

Re: How to Modify the Address of Stack

Re: IWDG Doesn't Reset Without Refreshing with F103RC

Re: IWDG Doesn't Reset Without Refreshing with F103RC