topic Re: how to mux uart7(null modem) in i.MX Processors

how to mux uart7(null modem)

wangjia — Fri, 29 Jul 2016 15:29:17 GMT

pinctrl_uart7: uart7grp {

fsl,pins = <

MX6UL_PAD_ENET2_RX_EN__UART7_DCE_TX 0x1b0b1

MX6UL_PAD_ENET2_TX_DATA0__UART7_DCE_RX 0x1b0b1

> ;

};

configure like this , and disable the pinctrl_enet2 interface . but no TX our when

i am using the echo "test" >/dev/ttymxc6 .

but opposite the uart6 success like this configure :

pinctrl_uart6: uart6grp {

fsl,pins = <

MX6UL_PAD_ENET2_RX_DATA0__UART6_DCE_TX 0x1b0b1

MX6UL_PAD_ENET2_RX_DATA1__UART6_DCE_RX 0x1b0b1

> ;

} ;

how can we enable the uart7 , anybody help me ?

Original Attachment has been moved to: imx6ul-14x14-evk.dts.zip

Re: how to mux uart7(null modem)

igorpadykov — Fri, 29 Jul 2016 23:45:34 GMT

Hi wang

one can check if enet2 is enabled in uboot (include/configs/mx6ul_14x14_evk.h)

with CONFIG_FEC_ENET_DEV == 1

and try to disable it too.

Best regards

igor

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Re: how to mux uart7(null modem)

wangjia — Sat, 30 Jul 2016 10:20:19 GMT

thanks you reply . Unfortunatly i has been disable it already .

because of no use of ENET2 .

#define CONFIG_FEC_ENET_DEV 0

#if (CONFIG_FEC_ENET_DEV == 0)

#define IMX_FEC_BASE ENET_BASE_ADDR

#define CONFIG_FEC_MXC_PHYADDR 0x2

#define CONFIG_FEC_XCV_TYPE RMII

#elif (CONFIG_FEC_ENET_DEV == 1)

#define IMX_FEC_BASE ENET2_BASE_ADDR

#define CONFIG_FEC_MXC_PHYADDR 0x1 /* need board rework */

#define CONFIG_FEC_XCV_TYPE RMII

#endif

Re: how to mux uart7(null modem)

igorpadykov — Sun, 31 Jul 2016 23:37:59 GMT

Hi wang

one can attach jtag or use memtool to check uart iomux registers,

CCM_CCGR uart clock gate and try manually write to UARTx_UTXD

Best regards

igor