參考資料：
https://github.com/szemzoa/awboot
https://whycan.com/t_9231.html
https://bbs.aw-ol.com/topic/2338/mangopi-dual-t113-%E4%B8%BB%E7%BA%BF%E5%86%85%E6%A0%B8%E7%BC%96%E8%AF%91%E8%AE%B0%E5%BD%95
$ cd
$ git clone https://github.com/szemzoa/awboot
$ cd awboot
$ vim board.c
sunxi_usart_t usart_dbg = {
.base = 0x02500000,
.id = 0,
.gpio_tx = {GPIO_PIN(PORTE, 2), GPIO_PERIPH_MUX6},
.gpio_rx = {GPIO_PIN(PORTE, 3), GPIO_PERIPH_MUX6},
};
$ make
$ xfel write 0x30000 awboot-fel.bin && xfel exec 0x30000
P.S. 預設使用UART5作為除錯界面，司徒焊接成UART0，故作如上修改
Baudrate 115200bps
[I] AWBoot starting [D] DRAM size: 128M [D] DRAM simple test OK. [D] CPU freq: 1200 MHz [I] SMHC: sdhci0 controller initialized [W] SMHC: timeout [D] SMHC: SD detect failed [W] SMHC: timeout [D] SMHC: MMC detect failed [W] SMHC: init failed, trying SPI [D] SPI: init... [D] SPI: set spi clock=100MHz, mclk=200MHz