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CAlex's avatar
CAlex
Icon for Contributor rankContributor
3 years ago

Baremetal with UART(RS232) issue

Hi, according to the user manu of Cyclone V soc said, the UART is up to 1Mbps for RS232 communication, But when checking the examples of 16550 UART, the rate is set to 115200 bps for maximum. ...
aikeu's avatar
aikeu
Icon for Regular Contributor rankRegular Contributor
3 years ago

Hi CAlex,


Are you referring to the soft UART 16550 uart IP from the embedded peripheral user guide?

https://www.intel.com/content/www/us/en/docs/programmable/683130/21-2/introduction.html


For Cyclone V HPS there are two in build hard UART, UART0 and UART1.

Seems like most standard communictiona speed which I commonly see for UART is 115200bps. I think to have a higher bps it might probably has a higher chance to introduce error in the data sending.


Thanks.

Regards,

Aik Eu


FvM's avatar
FvM
Icon for Super Contributor rankSuper Contributor
3 years ago
HPS UART supports up to 6.25 Mbps with 100 MHz clock according to processor manual, just need to program baud generator registers respectively. Hardware wise, the high baud rates are well possible with RS-485 interface. RS-232 works with 923 kbps as highest standard rate on most PCs.