2022-06-21 03:06 PM
I'm looking to connect a Waveshare e-Paper display to my STM32U5 discovery kit (B-U585I-IOT02A).
On the Waveshare website (https://www.waveshare.com/wiki/7.8inch_e-Paper_HAT), they have a pinout for the SPI bus on a STM32F4 chip as follows:
Connect to STM32F429IGT6 (SPI)
IT8951 STM32 Description
5V 5V 5V Power input
GND GND Ground
MISO PE13 Data output
MOSI PE14 Data input
SCK PE12 Clock input
CS PE11 Chip select (Low active)
RST PC5 Reset (Low for reset)
HRDY PA7 BUSY state output (Low for busy)
What are the equivalent pinouts for the STM32U585? 5V/Gnd are obvious. I think MISO/MOSI/SCK/CS go to PE12/PE13/PE14/PE15. Perhaps HRDY goes to PA8, but I'm not fully sure. I don't know where RST(PC5) maps to on the STM32U585. Can you please help me?
Also, if I wanted to bypass this RPi HAT, what would you recommend?
Thanks,
Vince
Solved! Go to Solution.
2022-06-22 07:47 AM
Hello @VLaPo.1 ,
Thank you for sharing your question.
It's not that easy to migrate from a STM32F4 to a STM32U5, they are not from the same product's family.
The STM32F4 is a High Performance microcontroller with a embedded Cortex M4 and the STM32U5 a Cortex M33 Ultra-low-power.
I looked at the IT8951 firmware, and you need to make some updates on your project to make it works.
In attached the schematic for the STM32U5 discovery kit (B-U585I-IOT02A).
Best Regards,
A.MVE
2022-06-22 07:47 AM
Hello @VLaPo.1 ,
Thank you for sharing your question.
It's not that easy to migrate from a STM32F4 to a STM32U5, they are not from the same product's family.
The STM32F4 is a High Performance microcontroller with a embedded Cortex M4 and the STM32U5 a Cortex M33 Ultra-low-power.
I looked at the IT8951 firmware, and you need to make some updates on your project to make it works.
In attached the schematic for the STM32U5 discovery kit (B-U585I-IOT02A).
Best Regards,
A.MVE
2022-06-22 12:28 PM
Very helpful! Thank you very much. I appreciate your time to answer and the information provided and will pursue this. Thank you.