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Resolved! I2C problem (full story with pics)

Hello,I have a custom STM32F439VITx board running at 60MHz clocked from the HSI. I have three devices on I2C3, two of which function correctly, the third, an mb85rc64 non-volatile memory, fails on both read and write operations.The I2C is configured ...

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DCarr.1 by • Senior
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Partial framebuffer SPI LCD best tearing effect strategy?

I ask about G071 exampke code, but nobody replies, then i try use more specific question. My test display is round 240x240 SPI LCD. TE signal is fmark .(one pulse per frame)In partial or block window send method RAM in display is updated on random pl...

MM..1 by • Chief III
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Resolved! STM32F030C8T6TR Reset continuesly time interval?

I place oscilloscope probe at reset pin of MCU it get low reset continuously time period​I observed RCC​- CSR resistor which gives LSIRDY=1 AND IWDGRSTF=1 both are set How can I make them of and solve this reset problem?​Below attached images of MCU ...

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Resolved! Best way to use DMA without knowing size of SPI transfer ?

Hi,device : STM32G473VBT6What is the best way to process SPI data when we don't know how many bytes will come from the SPI master ?I use the SPI in full duplex slave.The problem with DMA is that the DMA buffer is circular, where my processing functio...

sde c.1 by • Senior II
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Is the parameter 'ActiveFrameLength' and 'FrameLength' under the FrameInit significant when the SAI module is configured to operate in slave mode to receive data?

I am trying to configure the SAI block in slave mode to receive a set of data. The Frame Sync signal and the data clock shall be provided from an external device. In a case where the active frame length and the frame length are to be decided by the m...

Jansunil by • Associate II
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Updating the firmware on my STM32H745ZI-Q causes CPU2 not to boot and times out in error_handler(). Is there a way to use an older firmware?

I have updated the firmware on my STM32H745ZI-Q and when I run in debug mode the code runs until:while((__HAL_RCC_GET_FLAG(RCC_FLAG_D2CKRDY) != RESET) && (timeout-- > 0)); if ( timeout < 0 ) { Error_Handler(); }The code stops in the error handler.Is ...

KSOdin2 by • Associate III
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Resolved! Fails to execute from QSPI Flash but read works

Hi,I have some issues with executing directly from QSPI with a NUCLEO-F412ZG and a connected Winbond W25Q80DV QuadSPI Flash which we are looking into as a workaround for the component shortage (will be a L4 variant but using a F4 for testing).Reading...

HSE oscillator when using USB

The STM32F303xB datasheet states that HSE oscillator should be used when using USB. I suspect it is because of the degraded accuracy of the HSI oscillator at temperature. I've had issues with CAN not working well with HSI at elevated temperature. Doe...

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