FreeRTOS uart1 to uart2

Partners & Sponsors ST
1

I want to transfer data from serial port 1 to serial port 2, and then transfer serial port 2 to serial port 1 in FreeRTOS.
Is there an easy way to achieve this or still have to use a queue.

2

Assuming you don’t have a DMA then the most efficient way would be to have the receive interrupt for uart 1 to write received bytes directly to uart 2, and vice
versa. Failing that a FreeRTOS stream buffer would be much more efficient than a queue - some FreeRTOS demos uses queues for this but only as a test as it deliberately loads the system - not as an example of an efficient method.

3

Thanks for your replyWe use STM32F429, it has DMA. Where can we find stream buffers Demo for STM32, or other MCUs?

4

Just google “FreeRTOS stream buffer” and you will find pages on the website and I think also in the book.