UART2 and UART0 configuration

[satnam2]

Posted on May 05, 2010 at 16:08

UART2 and UART0 configuration

[satnam2]

Posted on May 17, 2011 at 10:00

Many thanks dear.....

Your suggestions helped me solve the problem. I disabled all the pheripheral connects for the TX pins and configured uart2 before uart0. Now all the three uarts are working fine with there Rx interrupts. 

Thanks a lot..................

Regards,

Satnam Singh 

[Pantuca.Erwin]

Posted on May 17, 2011 at 10:00

i recheck your settings with the datasheet.  i think your settings for uart0_tx also set GPIO_IPInputConnected to GPIO_IPInputConnected_Enable.  If you look at what the library is doing this will set SCU->GPIOIN register to 1 for this pin.  this will enable the Alternate Input1 for P3.1 which is uart2_rx.

so my guess is when using 3uarts, you initialize uart2 first then uart0, which changes the uart2_rx perpheral connection to a different pin P3.1.  and it also explains why uart0 cannot work with uart2 while other combinations work.

in any case, i think it is proper not to set the GPIOIN register if the pin will be used only as output.  let us know if this is any help.