STM32 MCUs Boards and hardware tools

Ask questions and find answers on STM32 hardware set-ups, including schematic-related challenges, debugging probes, power configurations, and more.

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GPIO Pin not going High

I'm using a Nucleo-H723VG board and trying to use the PB8 and PB9 pins. I'm able to set PB9 high and see a voltage of 3V but for PB8 it only shows a voltage of 359mv. I have tried enabling the internal pullup and still doesn't go high to 3V.The yello...

jasd33p_0-1725464875313.png
jasd33p by Associate II
  • 1039 Views
  • 9 replies
  • 4 kudos

Resolved! I2C clock incorrect

Im using the stm32f407 discovery to run I2C in fastmode (400kHz), using the equation given in the datasheet, I choose the system clock to be 120Mhz, so I have 30Mhz pclk for I2C. duty cycle T_low/T_high = 2, so CCR is 25d, T_rise is 300ns so that wou...

Screenshot (91).png
NoNamed by Associate II
  • 788 Views
  • 3 replies
  • 1 kudos