DevHeads IoT Integration Server•17mo ago

What could be causing intermittent UART communication failures in my AVR32UC MCU running Zephyr OS?

I'm trying to develop a smart healthcare system using an AVR32UC microcontroller running Zephyr OS. The system uses UART to communicate between the MCU and a central monitoring station. However, I'm experiencing intermittent communication failures, where the data received is occasionally corrupted or incomplete. I suspect the issue might be related to my UART configuration or the Zephyr OS UART driver. I have Verified the baud rate and ensured it's the same on both ends, checked for noise issues on the UART lines, and experimented with different buffer sizes. What could be causing the intermittent UART communication failures? Are there any specific configurations in Zephyr OS that I might be missing to ensure stable UART communication?
The UART initialization code is attached.

Solution

If you dealing with intermittent UART communication issues on a AVR32UC microcontroller running Zephyr OS , you must check your UART setup .
Your hardware flow control should be enabled, adjust the buffer sizes, ensure the ISR is running smoothly

Jump to solution

nour_oud•8/13/24, 9:48 PM

UART_Intermittent_Communication.txt1.27KB

Solution

Marvee AmasiAPP•8/13/24, 9:48 PM

ZacckOsiemoAPP•8/13/24, 9:49 PM

you need to find a root cause, that way you know what you are fixing

Marvee AmasiAPP•8/13/24, 9:49 PM

Change flow_ctrlflow_ctrl from UART_CFG_FLOW_CTRL_NONEUART_CFG_FLOW_CTRL_NONE to UART_CFG_FLOW_CTRL_RTS_CTSUART_CFG_FLOW_CTRL_RTS_CTS in the uart_configuart_config struct

DtyninAPP•8/13/24, 10:46 PM

yeah thanks bro @Marvee Amasi I was able to resolve the intermittent UART communication issues on my AVR32UC MC I made a few adjustments. I enabled hardware flow control, optimized the ISR, and ensured proper configuration for stable data handling. Here is my updated code snippet.

0UART__Intermittent_Communication_fixed.txt1.28KB

Marvee AmasiAPP•8/13/24, 10:46 PM

Oh that's good

Enthernet CodeAPP•8/13/24, 10:47 PM

@Dtynin Your intermittent UARTUART issues might be due to incorrect flow control settings or interrupt priorities in Zephyr OSZephyr OS. Make sure your hardware and software flow controlflow control are set consistently. Also, check the UARTUART driver's interrupt priorities if they’re too low, other interrupts might be causing data corruption. If possible, enable DMADMA to help stabilize the communication.

DtyninAPP•8/13/24, 10:48 PM

thanks I've been able to resolve it @Enthernet Code

What could be causing intermittent UART communication failures in my AVR32UC MCU running Zephyr OS?

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