t113修改串口

1 sys_config.fex

[uart_para]
uart_debug_port = 0
uart_debug_tx   = port:PE02<6><1><default><default>
uart_debug_rx   = port:PE03<6><1><default><default>
 

2 uboot修改启动参数

3 修改env.cfg启动地址和传输

#earlycon=uart8250,mmio32,0x05000000
earlyprintk=sunxi-uart,0x02500000
initcall_debug=0
console=ttyS0,115200

4 修改linux内核配置

CONFIG_DEBUG_VM=y
# CONFIG_SCHED_DEBUG is not set
CONFIG_DEBUG_MUTEXES=y
CONFIG_STACKTRACE=y
# CONFIG_FTRACE is not set
CONFIG_ATOMIC64_SELFTEST=y
CONFIG_DEBUG_LL=y
CONFIG_DEBUG_SUNXI_UART0=y
CONFIG_DEBUG_UART_PHYS=0x02500000
CONFIG_DEBUG_UART_VIRT=0xf2500000
CONFIG_EARLY_PRINTK=y
CONFIG_SPECIFY_CONSOLE_INDEX=y
CONFIG_CONS_INDEX=1

5 修改linux dts文件引脚配置;