How to increase the UART buffer?

Projects Networking, Protocols, and Devices
1

Hi, everybody!
I faced a problem not grasps of the size of the UART buffer. Whether it is possible to increase the buffer size?

2

You can either edit the source, or you could poll more frequently.

3

search for hardware serial.cpp

4

AWOL:
You can either edit the source, or you could poll more frequently.

Check of arrival of data in UART to be made each 2 seconds. I can't check more often!

5

robtillaart:
search for hardware serial.cpp

You can tell that it is necessary to change?

6

I can't check more often!

I'd fix that.
At any common line speed, you could fill the memory of most Arduinos in that time..

7

I can't check more often!

Sure you can. You have our permission.

8

robtillaart:
search for hardware serial.cpp

Thank you very much! I increased the buffer to 128 bytes.

9

AWOL:
At any common line speed, you could fill the memory of most Arduinos in that time..

Tell me about it. In one embedded device I develop for at work, the device has a 4KB SRAM buffer for receive, and a 2KB buffer for transmit. That's 3x the total SRAM availability of the ATmega328P, just for the serial ring buffers, necessitated by the high speed RS485 packet protocol used. I don't think I'll be implementing that comms protocol for Arduino any time soon... :slight_smile: