sys_config.fex
(BOOT0与Uboot的串口)sys_config.fex
的路径是 device/config/chips/t113/configs/evb1/sys_config.fex
中的 uart_debug_port
修改前:
[uart_para]
uart_debug_port = 0
uart_debug_tx = port:PF02<3><1><default><default>
uart_debug_rx = port:PF04<3><1><default><default>
修改后
[uart_para]
uart_debug_port = 0
uart_debug_tx = port:PE02<6><1><default><default>
uart_debug_rx = port:PE03<6><1><default><default>
其中<3>
改为<6>
是查阅数据手册中 PE2、PE3 的UART0是 Function6 得知的
port:PE02 <6><1><default><default>
^ ^
PE2脚 引脚功能6(查阅datasheet得知)
路径:device/config/chips/t113/configs/evb1/board.dts
修改前
uart0_pins_a: uart0_pins@0 { /* For EVB1 board */
pins = "PF2", "PF4";
function = "uart0";
drive-strength = <10>;
allwinner,muxsel = <3>;
bias-pull-up;
};
uart0_pins_b: uart0_pins@1 { /* For EVB1 board */
pins = "PF2", "PF4";
function = "gpio_in";
};
修改后
uart0_pins_a: uart0_pins@0 { /* For EVB1 board */
pins = "PE2", "PE3";
function = "uart0";
drive-strength = <10>;
allwinner,muxsel = <6>;
bias-pull-up;
};
uart0_pins_b: uart0_pins@1 { /* For EVB1 board */
pins = "PE2", "PE3";
function = "gpio_in";
};