cannot communicate using SPI

naveen-0 · ‎2025-08-19

I am trying to communicate to a e-paper display of waveshare 1.54inch v2 with B-WL5M-subg1. I have used the program file the company has provided but there is no respone in the module. I have tried using esp32 and the module works fine with it. both esp32and stm32 uses same program file while checking with logic analyzer both mcu show similar data format. But why isnt it working with stm32. I have attached the program for referense if there is any suggestions or solutions I would like to know.

Saket_Om · ‎2025-08-20

Hello @naveen-0

Are baud rates the same for ESP32 and STM32 MCUs, or do they differ between the two platforms?

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Saket_Om

naveen-0 · ‎2025-08-20

yes both have same baud rate

Saket_Om · ‎2025-08-21

Hello @naveen-0

Could you please share the GPIO config of your SPI peripheral?

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Saket_Om