SPI + I2C Example Project

[Linkpad]

Hi,

I am struggling to get SPI and I2C to work at the same time on my project I have tried multiple things (DMA, interrupts etc...) are there any example projects that already have this implemented? I am simply trying to read an I2C sensor value and show it on an SPI screen, as soon as I enable the SPI TFT the I2C returns zero values....

[Pierre_Paris]

Hello @Linkpad,

Thank you for your question !

Here some Remark :

• What is your stm32F3 ?
• Can you please share your code/configuration for SPI and I2C ? 
• Are you using HAL_I2C_IsDeviceReady() and HAL_I2C_Mem_Read() function ? 
• I2C returns zero values -> Is the function return an error or success code ?
• Did you use the debug mode ? Have you scoped SDA and SCL ?

Best Regards,

Pierre

[Linkpad]

Hi Pierre,

Thanks for the advice what was happening in this case is the STM32F303K8 Discovery Board was pulling the I2C system low as soon as SPI was initiated, I swapped the project to an STM32F412G Discovery Board and the problem went away and is now working fine. I think some discovery boards have limitations on functionality (with jumper settings).

Thanks

Patrick

[Billy OWEN]

Hi @Linkpad 

The forum moderator had marked your post as needing a little more investigation and direct support. An online support case has been created on your behalf, please stand by for just a moment and you will hear from us.

Regards,

Billy