topic Re: Some Issues About RXD in i.MX Processors

Some Issues About RXD

tony_l_cai — Tue, 30 Jun 2015 02:10:45 GMT

Hi，all

We got a problem, when we use the IOMUX MX6DL_PAD_SD4_DAT4__UART2(including TXD,RXD,RTS and so on), and in our project, we use both the GPIO2-13 and MX6DL_PAD_SD4_DAT5__UART2_RTS,so they need to switch mutually. And could it will interfere with the MX6DL_PAD_SD4_DAT4__UART2_RXD?

Because we found that pin MX6DL_PAD_SD4_DAT4__UART2_RXD need init again before we used it,though it had init at the beginning.If not, could you give me any other reeasons? Because we could not use MX6DL_PAD_SD4_DAT4__UART2_RXD in any other way.

3Q~

Re: Some Issues About RXD

igorpadykov — Wed, 01 Jul 2015 02:49:22 GMT

Hi tony

these functions should not depend on each other, you

can try to debug printf uart iomux registers (or use memtool) to check

them.

Best regards

igor

-----------------------------------------------------------------------------------------------------------------------

Note: If this post answers your question, please click the Correct Answer button. Thank you!

-----------------------------------------------------------------------------------------------------------------------

Re: Some Issues About RXD

tony_l_cai — Mon, 20 Jul 2015 09:29:24 GMT

Hi, igor

Lot of pins have initialized in the board_init, and MX6DL_PAD_SD4_DAT4__UART2_RXD is also included. Of cause, before we use it in UART function, we dont use it in any other function. why do we need to init again , before we use it in UART function? Because if we dont init it again, the UART function will dont work. So help please~

3Q~

Re: Some Issues About RXD

igorpadykov — Mon, 20 Jul 2015 13:07:39 GMT

Hi tony

I think you can debug it, stopping program in several places,

start from very beginning, then attach jtag and check IOMUX MX6DL_PAD_SD4_DAT4__UART2.

Best regards

igor