RS485 Communication problem in BeagleBone Black

I am trying to send and receive data from my PC to BeagleBone Black via RS485. I used a ‘ISO3082’ transceiver in between to make the signals compatible. I used UART2 of BBB. The RE/DE pin is not getting toggled for Tx and Rx. My dts code is as below:

&am33xx_pinmux {
uart2_pins: pinmux_uart2_pins {
        pinctrl-single,pins = <
                0x154 (PIN_OUTPUT_PULLDOWN | MUX_MODE1)/* P9_21: uart2_txd */
                0x150 (PIN_INPUT_PULLUP | MUX_MODE1)   /* P9_22: uart2_rxd */
                0x04c (PIN_INPUT_PULLDOWN  | MUX_MODE7) /*P9_16: gpio1[19] */
                >;
        };

};
};

&uart2 {
       status = "okay";
       pinctrl-names = "default";
       pinctrl-0 = <&uart2_pins>;
       rts-gpio = <&gpio1 19 GPIO_ACTIVE_HIGH>;
       rs485-rts-active-high;
       /* rs485-rx-during-tx; */
       rs485-rts-delay = <1 1>;
       linux,rs485-enabled-at-boot-time;
     };
 

No data transfer is happening. What may have gone wrong? Please help.

BBB kernel version:

uname -a
Linux arm 4.1.15-ti-rt-r40 #1 SMP PREEMPT RT Fri Jan 8 09:44:57 UTC 2016 armv7l a