Some Issues About RXD

[tony_l_cai]

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~

[igorpadykov]

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

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[tony_l_cai]

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~

[igorpadykov]

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