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Test available UART in iMX6Sabre

Question asked by Kunal Kulshrestha on Mar 21, 2017
Latest reply on Mar 21, 2017 by Kunal Kulshrestha

Hi All,


I am trying to test UART3 i.e. enabled as ttymxc2 in iMX6DLsabreauto board which I am working on. What I tried is to send data from UART3 TX to UART4 RX(configured as console) and check if the sent data is seen at minicom, so test passes. I am facing some issues with the test. Generally not able to check the success. Wanted to know if the approach looks ok, or do I need to do more changes to make this happen? I connected Pin 8 of U17 chip (BT_WIFI_UART3_TXD/SD4_CMD) to the RX of debug port(P{in 3 of J18).


Attached are some related documents (schematic, dts etc.). Any help will be appreciated.



        pinctrl_uart3_1: uart3grp-1 {
            fsl,pins = <
                MX6QDL_PAD_SD4_CLK__UART3_RX_DATA    0x1b0b1
//                MX6QDL_PAD_SD4_CMD__UART3_TX_DATA    0x1b0b1
                MX6QDL_PAD_EIM_D30__UART3_CTS_B        0x1b0b1
                MX6QDL_PAD_EIM_EB3__UART3_RTS_B        0x1b0b1


        pinctrl_uart3dte_1: uart3dtegrp-1 {
            fsl,pins = <
                MX6QDL_PAD_SD4_CLK__UART3_TX_DATA    0x1b0b1
                MX6QDL_PAD_SD4_CMD__UART3_RX_DATA    0x1b0b1
                MX6QDL_PAD_EIM_D30__UART3_RTS_B        0x1b0b1
                MX6QDL_PAD_EIM_EB3__UART3_CTS_B        0x1b0b1


        pinctrl_uart4: uart4grp {
            fsl,pins = <
                MX6QDL_PAD_KEY_COL0__UART4_TX_DATA    0x1b0b1
                MX6QDL_PAD_KEY_ROW0__UART4_RX_DATA    0x1b0b1


Thanks and regards,