Support data rates higher than 115200

[naikrovek]

The USART on the chip used by this display supports bitrates up to 4.5Mbps. (Baud is often confused with bitrate; they are not the same.)

I have successfully tested serial communications at the following speeds:

• 230400bps
• 460800bps
• 500000bps
• 576000bps
• 921600bps
• 1152000bps
• 1500000bps
• 2000000bps
• 2500000bps
• 3000000bps

3500000bps and 4000000bps do not work with my setup. I don't know if this is the issue of my USB to Serial adapter, my wiring, or the display.

I don't know what this does to the serial buffer queue time, or even if it speeds that up at all.

[yy502]

Thanks for raising this. I must admit I did confuse baud rate with bit rate 😅

I'll see if makes sense to update the code or documentation when I get time.