Serial communication

[czech-sebastian]

I'm currently trying to get an RP2040 up and running in conjunction with a panel and serial communication. I'm using Serial1 on the RP2040 for this. Unfortunately, the values ​​aren't arriving reliably. The lower I select the baud rate, the more reliable the results become. I suspect there's a problem with the interrupt. Has anyone successfully installed the library with serial communication?

[board707]

Hi @czech-sebastian
Indeed, if you use panels with a high refresh rate, they can interfere with the work of Serial and other interrupt-related tasks. Without going into details, the following changes can help:

• use a lower refresh rate for panels in DMD_STM32 code
• do not use SoftSeriall and similar libraries
• when working with Serial, the message transmitted at a time must be shorter than the buffer length in the HardwareSerial class. Between messages, make a pause of at least the delay between two panel updates.

For more specific recommendations, I need to know how many and what kind of panels you use and what kind of serial exchange.