About JJ.Lin

JJ.Lin · 2022-01-23

Hi,The STM32CubeIDE verison is v1.7.0, and now I found it perform full build every time when I click the build button, but I have just built it and didn't modify the source file.So how to do the settings?A full build takes too much time!Thanks!

JJ.Lin · 2022-01-20

Hi,Now the problem is FLASH->SR1 report FLASH_SR_RDPERR in HAL_FLASHEx_Erase_IT() and it failed to erase the BANK1 sector1 of address 0x8002000.I have checked the RDP is level0. What wrong with it ?And the code is here: HAL_FLASH_Unlock(); ...

JJ.Lin · 2022-01-20

Hi,Can I directly write in memory-mapped mode over QSPI of STM32H7 to NOR Flash?Thanks!

JJ.Lin · 2021-12-13

Hi,I am trying to add the character '123∞' to the "verdana_40" font data. Before this, Some characters (between 0x20 - 0x7A)has been added to it.They are managed by array "unicodes_verdana_40_4bpp_0[]", while I found that the the character '∞' was g...

JJ.Lin · 2021-12-12

Hi,Now I need to update the content that user inputs, but it seems that the TextArea widget can only set TypedText of generated.Maybe using text_with_wildcard and format the placeholder with char array. So is there any graceful way to do it ? /jjlin

JJ.Lin · 2022-01-24

Thank you for your reply! I have found the final cause: UID byte read operation. UID address of STM32H7B0 is 0x08FF F800, and if you access it in uint8_t *, a hardfault may occur. It is okay to access in uint32_t *.

JJ.Lin · 2021-09-10

Yes! For the reaseon that I use a lot of shapes object in a View class and it cost nearly 40KB code size. Can I do like this ?:Shape<4> *shape1 = new Shape<4>();I need only set the four points and postion which are regular so that it will cost a less...

JJ.Lin · 2021-09-09

Hello?

JJ.Lin · 2021-09-01

Hello,I scoped the NRST pin and found that the NRST was pulled down some times when operating SDRAM.This is based on the BOR ( brownout reset ) level is off and the PDR_ON pin is float in the air.If I set the level to any level of 1-3, it works well ...

JJ.Lin · 2021-08-31

Thank you a lot! If it works well the CSR register show that it is reset by soft reset as is designed, but unexpected reset due to POR/PDR (power on/ down) reset. How can NAND flash or SDRAM read/wirte cause power reset? So how can I do next ?

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How to reduce the full build times of STM32CubeIDE?

STM32H7B0 FLASH_SR_RDPERR in HAL_FLASHEx_Erase_IT()

Can I directly write in memory-mapped mode over QSPI of STM32H7 to NOR Flash

Character is not generated correctly

Set text for TextArea widget using char array instead of using typedText

Re: STM32H7B0 FLASH_SR_RDPERR in HAL_FLASHEx_Erase_IT()

Re: How to cut down code size

Re: Which pixel format is more efficent for RGB565?

Re: fmc operations cause mcu reset repeatly

Re: fmc operations cause mcu reset repeatly