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Altera_Forum's avatar
Altera_Forum
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16 years ago

Speed! when reading from the serial port

Hello folks, I am reading messages from the UART at 230400 8-N-1. The messages are 41-byte long. The whole message takes about 2ms to be sent into the UART. However, when I do fscanf, fgets...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Supposedly, speed is not the problem but latency. Speed can't be increased, as (I believe) the UART driver is done in a quite optimum way.

Do you use the FifoedUart IPCore ? The AlteaUART needs a too low latency interrupt service, which Linux can't provide. The hardware Fifo will relax the problem.

-Michael