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Cannot get correct data from MAX31865 SPI bus

Has anybody worked with MAX31865 PT100 sensor chip. I have a module with that chip on a STM32F746 board and SPI bus gives me only zeros. Local loop MOSI->MISO works. The chip doesn't look very complicated but I get nothing out off it. The module has ...

LMI2 by Lead
  • 601 Views
  • 3 replies
  • 1 kudos

Confusion with the DBGMCU_IDCODE register.

In our product we will be placing one of 3 different processors. I have developed code to determine this by evaluating the registers for the peripherals, but I'm wondering if there is another way.I've been looking at the DBGMCU_IDCODE register. And o...

mreed by Associate III
  • 4359 Views
  • 6 replies
  • 0 kudos

UART Problem after Flash write

Hi!I'm working in a project that uses flash memory to store calibration data. At the first power on (before writing data in flash) everything works fine. After calibration, if I turn off the board and turn on again, my USART2 stops working (only send...

RBall.1 by Associate
  • 563 Views
  • 1 replies
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STM32H735 SDMMC Error FR_NO_FILESYS

I'm having trouble getting the on board SD card reader working properly. The board is the STM32H735G discovery kit. When attempting to mount the disc it comes back with error FR_NO_FILESYSTEM. A closer investigation shows that when reading the first ...

HSamm.1 by Associate II
  • 1135 Views
  • 5 replies
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CAN programming question

Hi !I'm new in the STM32 world ! So, sorry if my questions are stupid. I work on CAN with the example : FDCAN Classic Frame Networking.I want to know if in this example that I modified slightly, HAL_FDCAN_AddMessageToTxFifoQ(&hfdcan1, &TxHeader, TxDa...

KMiko.1 by Associate III
  • 5515 Views
  • 3 replies
  • 0 kudos

How to receive the data from SIM39EA Gps module?

I'm interfacing stm32f series microcontroller and SIM39EA gps module Thruogh terminal im getting this data but not valid data. /**************************************/$GPGSA,A,1,,,,,,,,,,,,,,,*1E$GPGSV,1,1,04,13,,,26,05,,,21,12,,,19,02,,,19*7C$GPRM...

MVENN.1 by Associate II
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  • 0 replies
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STM32F7 How to design external oscillator

Hello,I have been trying for a while now to properly design the external oscillator for the STM32F722RE MCU.Until now, I don't find a clear answer with detail calcul.To design the oscillator, I use 3 documentations:stm32f722re.pdfcd00221665.pdf (AN28...

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BSchn.2 by Associate II
  • 846 Views
  • 4 replies
  • 0 kudos