A simple way of viewing USART transmissions when you're already using a Saleae probe.

HSEROUT [DEC5 varTimer1, DEC5 varTimer3]

Activate the serial analyser at the bottom right of the Saleae window.

Name:  Saleae USART analyser.JPG
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In this example, 2 values are displayed at the top of channel 0. Yes, I'm embarassed to admit I just noticed this feature.

Robert