Enable UART Serial on AM572x
Download kernel
ti-processor-sdk-linux-am57xx-evm-05.01.00.11
Modify DTS
ti-processor-sdk-linux-am57xx-evm-05.01.00.11/board-support/linux-4.14.67+gitAUTOINC+d315a9bb00-gd315a9bb00/arch/arm/boot/dts/am572x-idk.dts
Add the following of contents:
myuart10_pins_default: myuart10_pins_default {
pinctrl-single,pins = <
/*DRA7XX_CORE_IOPAD(0x3558, PIN_OUTPUT | MUX_MODE14)*/ /*gpio3_29*/
/*DRA7XX_CORE_IOPAD(0x3688, PIN_INPUT_PULLUP | MUX_MODE3)
//DRA7XX_CORE_IOPAD(0x368C, PIN_OUTPUT | MUX_MODE3)*/ /*uart10_txd*/
DRA7XX_CORE_IOPAD(0x3570, (PIN_INPUT_PULLUP | MUX_MODE8)) /* vin2a_d2.uart10_rxd */
DRA7XX_CORE_IOPAD(0x3574, (PIN_OUTPUT_PULLUP | MUX_MODE8)) /* vin2a_d3.uart10_txd */
>;
};
&uart10 {
pinctrl-names = "default";
pinctrl-0 = <&myuart10_pins_default>;
/*=======================================
rts-gpio=<&gpio3 29 GPIO_ACTIVE_HIGH>;
// rs485-rts-active-high;
// rs485-rts-delay = <1 1>;
*/
/*Enable RS-485*/
/* linux,rs485-enabled-at-boot-time;
===========================================
*/
status = "okay";
};
Make kernel
make ARCH=arm CROSS_COMPILE=${CC} am572x-idk.dtb
Boring thing
date
timedatectl list-timezones
sudo timedatectl set-timezone Asia/Hong_Kong
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