GPIO Remap

[gdiez]

Posted on March 01, 2011 at 17:11

GPIO Remap

[Tesla DeLorean]

Posted on May 17, 2011 at 14:26

Normally USART4 if you program the GPIO as AF

To get USART3 to move there use GPIO_PartialRemap_USART3 or GPIO_FullRemap_USART3 A Partial Remap would move RX, TX A Full Remap would move RX, TX, CTS, RTS, CK

[gdiez]

Posted on May 17, 2011 at 14:26 Thks for the quick reply. 1.- But how can i distinguish to this different columns that I?ve marked with red square? 2.- If i do  GPIO_PinRemapConfigGPIO the pins gets multiplexed so then I can configure them?

[Tesla DeLorean]

Posted on May 17, 2011 at 14:26

1) The left box is the NORMAL mapping of USART3, the right box is a FULL REMAP of USART3. Look at the titles of the columns in the manual.

2) You will have to set the GPIO's attached to the peripheral (ie AF / Alternate Function - not a GPIO) for the outputs. And floating for inputs. Remember also the the AFIO clock must be enabled to perform the Remap.

[gdiez]

Posted on May 17, 2011 at 14:26 Thks for the reply. What document is that? I´ve the datasheet and the user manual and I havent this table.

[John F.]

Posted on May 17, 2011 at 14:26

RM0008 Reference manual rev 11

http://www.st.com/stonline/products/literature/rm/13902.pdf