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mccabehm
Associate III
since ‎2023-07-20
‎2023-11-28

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  • 18 Posts
  • 1 Solutions
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I2C Fast Mode Plus, 1 Mb/s

2023-11-27
I have an STM32H563 communicating on I2C4 @ 1 MHz (fast-mode plus) to an I/O expander with no problem. However when I add a temp sensor (TI TMP175) to the same bus, communication doesn't work for the TMP175. The TMP175 communicates > 400 KHz only if ...

VREFBUF and STM32H563VI

2023-11-06
I have VREFBUF configured for output to comparator on my board. I see this on MCU Vref+ pin...Is 1.2MHz waveform typical? Are capacitors on Vref+ expected to smooth? I looked for avg closer to 2.5v (VREFBUF_VOLTAGE_SCALE0). How close to 2.5v should t...

CMCIS OSv2/FreeRTOS and Thread State

2023-09-28
Just started playing with FreeRTOS on a NUCLEO-H563ZI board using CMCIS OSv2. Why does osThreadGetState() translate eSuspended to osThreadBlocked? I suspended a thread and then checked its state with osThreadGetState() which reports the state as bloc...

LPTIM2 Pulse Counter

2023-09-19
On NUCLEO-H563ZI board I put 3KHz square wave on LPTIM2_ETR (PC4). I want LPTIM2 to continuously count. However the count never increases. LPTIM2 setup...AndClock looks likeMX_LPTIM2_Init() looks likestatic void MX_LPTIM2_Init(void) { /* USER CODE ...

Using TIM1 To Count External Pulses On STM32H563

2023-09-14
I am playing with the TIM_InputCapture example (calculates frequency of external pulse) for the NUCLEO-H563ZI dev board. The example works OK except:Frequency is not updated for no edges (signal generator off)Minimum frequency is about 3KHz. I need t...
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