-18-
Document Name
AI7688H
Reference Manual
Version
V 2.0
Date 2019/08/08
3.8
Change bootloader console
If you want to use another UART port as the bootloader console, you need to
modify the bootloader
.
Get bootloader source code
modify the file board/rt2880/serial.h
/* UART registers */
#if defined (MT7621_FPGA_BOARD) || defined (MT7621_ASIC_BOARD) ||
defined (MT7628_FPGA_BOARD) || defined (MT7628_ASIC_BOARD)
#define RT2880_UART1 0x0C00 /* UART Lite */
#define RT2880_UART2 0x0D00 /* UART Lite */
#define RT2880_UART3 0x0E00 /* UART Lite */
//#define CFG_RT2880_CONSOLE RT2880_UART1
#define CFG_RT2880_CONSOLE RT2880_UART3
#else
#define RT2880_UART1 0x0500
#define RT2880_UART2 0x0C00 /* UART Lite */
#define CFG_RT2880_CONSOLE RT2880_UART2
#endif
and modify the CFG_RT2880_CONSOLE configuration.
Note that in bootloader code, RT2880_UART1 refers to
UART0(UART_TXD0/UART_TXR0) and so on. So modify the following
modification:
Change this:
//#define CFG_RT2880_CONSOLE RT2880_UART1
#define CFG_RT2880_CONSOLE RT2880_UART3
to this:
#define CFG_RT2880_CONSOLE RT2880_UART1
//#define CFG_RT2880_CONSOLE RT2880_UART3
This changes the bootloader console from UART2 to UART0.
