About sheng yang

sheng yang · 2024-11-05

I made a board with ST32H7B0ZBT6, and add a external flash with W25Q128JVS。I found after I enable mapped function, I couldn't write data to external flash any more.the code with enable mapped func as below: uint8_t W25Qxx_OSPI_Init(void) { OSPI_R...

sheng yang · 2024-09-05

I made a project with stm32h7 board, and use pemicro multlink to debug it under keil. I found it keep in systick handler pending but no active.I checked systick module register as:the counter is changed.and then I checked SCB releate registers asand ...

sheng yang · 2024-07-29

I made a board with spi1 connect a lora module, and the nss pin, I just want to use soft control. But I found that before I enable spi1, the SPI CR1 and CR2 register value as: (gdb) x/2wx 0x40013000 0x40013000: 0x00000024 0x00000040 but afte...

sheng yang · 2024-07-25

I use stm32CubeMX to generate usb code with HSI clock.Though I can config with usb clock to 48MHz, But stm32CubeMX software display there is clock issue as below:So I wonder can stm32f103cbt6 usb work under HSI clock?

sheng yang · 2024-06-28

stm32f429 ran in PCLK2 with 160MHz, and TIM8 prescaler division set to 0, auto reload set to 1.set up interrupt enable.in TIM8 update interrupt handler, just toggle PD4 pin out.when use oscilloscope to check the wave of PD4, just get around 2.3MHz. C...

sheng yang · 2024-11-05

Did you mean that I must callHAL_StatusTypeDef HAL_OSPI_Abort(OSPI_HandleTypeDef *hospi)function when I want to write data to flash by this function as belowuint8_t W25Qxx_OSPI_WritePage(uint8_t *pData, uint32_t WriteAddr, uint32_t Size) { OSPI_R...

sheng yang · 2024-11-05

I mean, if I don't mapped the external nor flash, then I can write data to it by HAL_OSPI_xxx releate functions. But if I mapped external flash to memory area 0X90000000 - xxxx, then I couldn't write data to the flash any more.

sheng yang · 2024-09-06

I'm sorry replay so late, later I found the reason is that I disabled irq before with.CPSID I

sheng yang · 2024-09-05

1. I have checked SysTick->CTRL = 0X7 so SysTick interrupt has beed enabled. 2. Execution cannot be in an equal or higher priority interrupt (print out SCB registers) I wonder which register do you mean ? and I have print these registers in the pict...

sheng yang · 2024-07-26

ok，I get it.thanks for your reply.

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after enable external flash mapped, couldn't write to external flash.

systick handler keep pending on stm32h7 board.

stm32f103cbt6 spi enable cause spi in slave mode

can stm32f103cbt6 usb work under HSI clock?

stm32f429 tim8 in up count mode, update interrupt couldn't generate 10Mhz PWM.

Re: after enable external flash mapped, couldn't write to external flash.

Re: after enable external flash mapped, couldn't write to external flash.

Re: systick handler keep pending on stm32h7 board.

Re: systick handler keep pending on stm32h7 board.

Re: can stm32f103cbt6 usb work under HSI clock?