UART_PIN_NO_CHANGE

aih5165
Posts: 15
Joined: Thu Aug 25, 2016 1:32 pm

UART_PIN_NO_CHANGE

Postby aih5165 » Mon Sep 25, 2017 12:15 pm

what's mean about UART_PIN_NO_CHANGE?
is it to say PIN not use,connect to no phy pin?

ESP_Sprite
Posts: 8921
Joined: Thu Nov 26, 2015 4:08 am

Re: UART_PIN_NO_CHANGE

Postby ESP_Sprite » Tue Sep 26, 2017 2:32 am

Esssentially, it means that the UART code should not touch any of the settings for that signal. If the signal already is routed to a pin in some fashion (e.g. by having manually tweaked the GPIO mux beforehand), it will stay there; if the signal is unconnected it will stay unconnected. Unless you specifically have code that acts on the signal beforehand, you can interpret this as 'do not connect'.

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