About sb_st

sb_st · 2024-12-16

Hi;I have a tlv493d magnetic encoder, with which I would like to communicate via i2c with an stm32f4 MCU. I can successfully initiate communication with this sensor via I2c, to perform an initial configuration of the sensor. I can verify this by way ...

sb_st · 2024-12-01

Hello;I'm writing a driver for a tlv493d magnetic encoder using CubeIDE. This encoder has a peculiarity where it pulls the SCL line of an i2c bus low when it has data ready to be read, at which point the MCU needs to initiate an i2c receive transacti...

sb_st · 2024-09-15

Hi there;I'm extremely new to the world of ST, and trying to get my feet under me with it, coming from a few years' experience developing for esp32 microcontrollers using the esp-idf framework. I have an Adafruit stm32f405 feather; I understand this ...

sb_st · 2024-09-13

Hi, I am new to the st environment, and trying to learn how to use cubeIDE. I am on a mac, with an external high DPI monitor. While I've figured out how I can increase the font size to made the UI easier to navigate, I can't figure out how to increas...

sb_st · 2024-12-19

Hi @MHoll.2 thanks for the info! I'd eventually like to work towards getting I2C interrupts working, as well as semaphore stuff, but am trying to get a simplest-case setup going here. I DO see that if I disable interrupts on the tlv493d and just peri...

sb_st · 2024-12-19

Hi @TDK, thank you! I would instrument the code to understand where HAL_BUSY is being reportedI'm sorry, can you elaborate what you mean by "instrument the code"? I am using a logic analyzer while stepping through code with a debugger, to view all th...

sb_st · 2024-12-18

I don't know if this is a further clue, but observing my SDA/SCL lines with a log probe throughout the initialization process, I'm noticing the "Setup to read to [0x7F+NAK]" bit off to the right there. Does that indicate something amiss with the comm...

sb_st · 2024-12-17

If SCL is low when you try to do an I2C transaction, the chip will return HAL_BUSY because the bus is busy. If you set the interrupt to happen on a rising edge instead of a falling edge, it should fix this.Oh interesting - you're suggesting my I2C t...

sb_st · 2024-12-10

I was finally able to solve this - I'll leave what I did here in case any more intrepid explorers chance upon this thread.Before I do though, I'll share something that was useful to understand, and that's the mention of 'connecting an additional GPIO...

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I2C and interrupts on SCL

stm32f4 interrupts and i2c

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