About And_reas

And_reas · 2023-09-13

Hello,we have currently some issues where the I2C bus got stuck (SCL stuck and Ground) until the configured timeout (in the STM32L4) is reached. I was able to reproduce the issue quite often in a stress test setup. Stress Test Setup description:The S...

And_reas · 2023-09-14

Hello @TDK,I am sorry if I did not correctly described which peripherals we are using.We are using I2C peripheral I2C2 and I2C4. As DMA we use DMA1 channel 4/5 for I2C2_TX/I2C2_RX and DMA2 channel 1/2 for I2C4_RX/I2C4_TX.To activate the I2C sequenc...

And_reas · 2023-09-13

Hello @Bob S,thanks for my feedback. That was also my guess and you are absolut right. We already changed the handling (in case the I2C Bridge is closed) to only have one active channel per chip. Ideally, I would get a conformation that this in fact ...

And_reas · 2023-09-13

Hello @LCE,according to the RM0394 for STM32L41xxx/42xxx/43xxx/44xxx/45xxx/46xxx, the I2C has Multimaster capabilities.But I did not find any information, if they I2C peripheral can also two channels as master on the same bus. In general, we will cha...

And_reas · 2023-09-13

Hello @Issamos ,I have used a logic anaylzer to record several measurements. Please note that for this measurement I changed the timeout value to 4 ms.This images shows a lot of visible situations where we had an timeout occuring.Here, the bus got st...

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STM32L4: Two I2C Channels on same Bus - SCL stucks at ground until Timeout

Re: STM32L4: Two I2C Channels on same Bus - SCL stucks at ground until Timeout

Re: STM32L4: Two I2C Channels on same Bus - SCL stucks at ground until Timeout

Re: STM32L4: Two I2C Channels on same Bus - SCL stucks at ground until Timeout

Re: STM32L4: Two I2C Channels on same Bus - SCL stucks at ground until Timeout