1、uboot修改
1)修改宏定义
/*include/config/ti8148_evm.h*/ #define CONFIG_SYS_NS16550_COM2 0x48024000 #define CONFIG_CONS_INDEX 3
2)使能UART2时钟
/* /board/ti/ti8148/evm.c per_clocks_enable*/ __raw_writel(0x2, CM_ALWON_UART_2_CLKCTRL); while(__raw_readl(CM_ALWON_UART_2_CLKCTRL) != 0x2);
3)首先编译升级uboot.min.spi,然后升级uboot.bin。
2、内核修改调试串口
/* uboot启动参数修改:*/ bootargs=console=ttyS2,115200n8 mem=128M dbg=7 rw root=/dev/ram initrd=0x82000000,16M /arch/arm/plat-omap/include/plat/uncompress.h // DEBUG_LL_TI81XX(1, ti8148ipnc); /* sunhj modify */ DEBUG_LL_TI81XX(3, ti8148ipnc);