Meaning of routing and pin assignment for UART

Status
Not open for further replies.
Y

yefj

Advanced Member level 4
Joined
Sep 12, 2019
Messages
1,212
Helped
1
Reputation
2
Reaction score
3
Trophy points
38
Activity points
7,269
Hello, I am trying to understand the link between the two parts of this UART example code which is taken from the link bellow.
At first we set PORT C pint 1 to be RX input and port C pin 0 as output(push pull amplified)
What exactly happens next in the USART-> ROUTE line?
I see bitwise OR but i can see how its linked to the locations we defined previosly.
Thanks.

peripheral_examples/series0/usart/async_polled/src/main_s0.c at master · SiliconLabs/peripheral_examples

Simple peripheral examples for Silicon Labs EFM32/EFR32 Series 0, Series 1, and Series 2 devices - SiliconLabs/peripheral_examples
github.com
 

For an detailed explanation, read the processor reference manual. In a short, writing to the USART1->ROUTE register is activating the above configured pins. The processor as several sets of dedicated GPIO pins that can be selected for the USART by a specific location code. The present code is apparently using default location 0, unless the LOC bits in USART1->ROUTE haven't been set differently before.

 

    Y

    yefj

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…