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wrong data send with slave i2c1 on STM32F103RCT6

STM32F103RCT6 i2c work as slave mode,master i2c machine worked with clock speed 400KHz.When master read many bytes from slave,a wrong data will come out behind the address byte.in normal,master transmits 0xA1,then it will receive 0x11 0x22 0x33 0x44b...

yqiu.11 by Associate
  • 475 Views
  • 1 replies
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EXTI line got odd/even interrupts count.

Hi friends,I met a problem.I used one EXTI line to check a button push-and-release. EXTI line was set to be triggered by both falling and raising edge. I know there will be burr when I pushed the bottom. The question is , when I pushed and then relea...

EYang.11 by Associate II
  • 427 Views
  • 2 replies
  • 0 kudos

Resolved! STM32H743 double precision FPU process single precision data

Hi,STM32H743 Cortex M7 core with double precision FPU, it process 32bit float data(single precision) in my project, I wonder if it affects efficiency and performance of FPU, In my performance testing program, it's no different from Cortex M4 FUP.Th...

lsong.1 by Associate II
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  • 4 replies
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timer 16 interupt not trigering on a stm32L432

Im migrating the code from a stm32L031 to a stm32L432 and the timer interupt isnt triggering Ive set the LED to toggle in the CaptureCallback. This code works on a L031 using timer22. Clearly Im missing something obvious;void HAL_TIM_IC_CaptureCallba...

PGood.1 by Associate II
  • 481 Views
  • 2 replies
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Resolved! Why is SPI clock baud rate limited to 18Mbit/s?

I'm using the STM32F072RB MCU and I am trying to increase the SPI baud rate. The HSI48 Clock is 48MHz and the minimum SPI clock prescaler is 2 which comes out to be 24Mbit/s. However, it gives me an error stating that the baud rate is more than 18MB...

JAlle.2 by Associate II
  • 764 Views
  • 2 replies
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RTC shifting in stm32L431

Hi,I am using stm32L431 and (32.768KHz ±20ppm 12.5pF 70kΩ) as LSE.Every day the time is update by internet, but in some cases, the clock shifting about 5 minutes.It occur aroung 2 times to week. what is probably happening?Binary data format and Alar...

GFont.1 by Associate III
  • 786 Views
  • 3 replies
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Wakeup from standby with RTC is causing losing time accuracy

Hello,I am using STM32L073V8T MCU, STM32CubeIDE. My application needs low power consumotion. When some events occurs, MCU move to standby. Than it waits new event for waking up. In other words, my application periodically check new event. After goin...

CYesi.1 by Associate II
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  • 11 replies
  • 0 kudos

Resolved! STM32F746 doesn't start up

A STM32F746 on a custom board powered by the step-down regulator TPS62082 by TI doesn't start in about 90% of cases.I flashed (which always works fine) a simple test program, which flashes two LEDs alternately:int main(void) { HAL_Init(); SystemC...

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