DART-6UL UART: Difference between revisions
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(Created page with "{{PageHeader|DART-6UL - External UART}} {{DocImage|category1=DART-6UL|category2=Yocto}} __toc__ = Test = By default, Variscite configured UART1, ttymxc2. to test:<br> <br/>Use...") |
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Edit arch/arm/boot/dts/ | Edit arch/arm/boot/dts/imx6ull-var-dart.dts | ||
Look for: | Look for: | ||
<pre> | <pre> | ||
/* ttymxc2 UART */ | /* ttymxc2 UART */ | ||
&uart3 { | &uart3 { | ||
pinctrl-names = "default"; | |||
pinctrl-0 = <&pinctrl_uart3>; | |||
fsl,uart-has-rtscts; | |||
status = "okay"; | |||
}; | }; | ||
</pre> | </pre> | ||
| Line 26: | Line 26: | ||
<pre> | <pre> | ||
&uart4 { | &uart4 { | ||
pinctrl-names = "default"; | |||
pinctrl-0 = <&pinctrl_uart4>; | |||
fsl,uart-has-rtscts; | |||
status = "okay"; | |||
}; | }; | ||
</pre> | </pre> | ||
| Line 35: | Line 35: | ||
Duplicate the corresponding pinctrl. Copy : | Duplicate the corresponding pinctrl. Copy : | ||
<pre> | <pre> | ||
pinctrl_uart2: uart2grp { | |||
fsl,pins = < | |||
MX6UL_PAD_UART2_TX_DATA__UART2_DCE_TX 0x1b0b1 | |||
MX6UL_PAD_UART2_RX_DATA__UART2_DCE_RX 0x1b0b1 | |||
MX6UL_PAD_UART2_CTS_B__UART2_DCE_CTS 0x1b0b1 | |||
MX6UL_PAD_UART2_RTS_B__UART2_DCE_RTS 0x1b0b1 | |||
>; | |||
}; | |||
</pre> | </pre> | ||
Into: | Into: | ||
<pre> | <pre> | ||
pinctrl_uart4: uart4grp { | |||
fsl,pins = < | |||
MX6UL_PAD_UART4_TX_DATA__UART3_DCE_TX 0x1b0b1 | |||
MX6UL_PAD_UART4_RX_DATA__UART4_DCE_RX 0x1b0b1 | |||
MX6UL_PAD_ENET1_RX_DATA1__UART4_DCE_CTS 0x1b0b1 | |||
MX6UL_PAD_ENET1_RX_DATA0__UART4_DCE_RTS 0x1b0b1 | |||
>; | |||
}; | |||
</pre> | </pre> | ||
The pins are set arbitrary. You should set them based on your hardware design. | The pins are set arbitrary. You should set them based on your hardware design. | ||
Revision as of 08:10, 28 December 2015
DART-6UL - External UART
Test
By default, Variscite configured UART1, ttymxc2.
to test:
Use minicom to connect.
Set the serial to ttymxc2
You can use a loopback or connect to anther computer
Example: configure UART4, ttymxc3
Edit arch/arm/boot/dts/imx6ull-var-dart.dts Look for:
/* ttymxc2 UART */
&uart3 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart3>;
fsl,uart-has-rtscts;
status = "okay";
};
Duplicate it and change the name and the pinctrl name. For Example:
&uart4 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart4>;
fsl,uart-has-rtscts;
status = "okay";
};
Duplicate the corresponding pinctrl. Copy :
pinctrl_uart2: uart2grp {
fsl,pins = <
MX6UL_PAD_UART2_TX_DATA__UART2_DCE_TX 0x1b0b1
MX6UL_PAD_UART2_RX_DATA__UART2_DCE_RX 0x1b0b1
MX6UL_PAD_UART2_CTS_B__UART2_DCE_CTS 0x1b0b1
MX6UL_PAD_UART2_RTS_B__UART2_DCE_RTS 0x1b0b1
>;
};
Into:
pinctrl_uart4: uart4grp {
fsl,pins = <
MX6UL_PAD_UART4_TX_DATA__UART3_DCE_TX 0x1b0b1
MX6UL_PAD_UART4_RX_DATA__UART4_DCE_RX 0x1b0b1
MX6UL_PAD_ENET1_RX_DATA1__UART4_DCE_CTS 0x1b0b1
MX6UL_PAD_ENET1_RX_DATA0__UART4_DCE_RTS 0x1b0b1
>;
};
The pins are set arbitrary. You should set them based on your hardware design.