topic Re: Could not recieve data on UART4 in i.MX Processors

Could not recieve data on UART4

koperapune — Mon, 08 Jul 2013 16:16:29 GMT

I am trying to configure UART4. I have added

MX6SL_PAD_KEY_ROW6__UART4_TXD

and

MX6SL_PAD_KEY_COL6__UART4_RXD

in mx6sl_brd_pads[ ].

Above pin configs are defined as

#define MX6SL_PAD_KEY_ROW6__UART4_TXD \

IOMUX_PAD(0x04AC, 0x01A4, 1, 0x0000, 0, MX6SL_UART_PAD_CTRL)

#define MX6SL_PAD_KEY_COL6__UART4_RXD \

IOMUX_PAD(0x048C, 0x0184, 1, 0x0814, 2, MX6SL_UART_PAD_CTRL)

I crosschecked these configs and looks like these configs are correct..

I have also called "imx6sl_add_imx_uart(3,NULL)" from function mx6_evk_init()

I configured UART5 just same as UART4. UART5 works well where as UART4 sends data correctly however could not receive it.

Would you please provide me pointers to solve this problem.

jimmychan — Mon, 22 Jul 2013 07:09:37 GMT

Please double check the daisy chain setting of the input pin UART4_RXD.

For your reference, some discussions about the UART pins. https://community.freescale.com/message/340463#340463

Hope this can help you.

boris-benshapir — Sun, 25 May 2014 11:43:42 GMT

Did you manage to solve? I'm having a similar issue... please help