Update fmc-dio doc

5982b79c · Jorge Machado · d37816b8 · 5982b79c
Commit 5982b79c authored Oct 06, 2020 by Jorge Machado
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fmc-dio.in doc/fmc-dio.in +6 -5

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@@ -544,11 +544,12 @@ This is the list of supported modes for channels:


 The new hardware pulse generation feature allows to configure a pulse train with a higher 
-frequency than the previous version. However, if interrupts are not disabled with
-the mask_irq command, there is still a software limitation due to the 
-interrupts handling (see following section for deeper details) and this frequency should 
-be controlled in a proper way just to avoid PC freezing. It depends on your current machine 
-configuration and can be easily characterized with the existing tools for fmc-dio project.
+frequency than the previous version. However, there is still a software limitation due to the 
+interrupts handling. If the interrupt of the channel is disabled, the pulse train generation 
+will be indefinite because the pulse counting mechanism remains excecuted in the sofware interrupt 
+handler. This frequency should be controlled in a proper way just to avoid PC freezing.
+Because of this, the maximum frequency depends on your current machine configuration and can be 
+easily characterized with the existing tools for fmc-dio project.

 There is no command to flush the timestamp FIFOs, but you can
 always ``@code{wr-dio-cmd stamp > /dev/null}'' if needed.