WhyCan Forum(哇酷开发者社区)

按照  燕十三  的RTT教程：https://whycan.cn/t_943.html

成功下载了rttbootloader_f1c100s_v1.0.0.bin

进行到使用RTATO工具下载固件的步骤

使用串口助手发现没有进行倒数

串口数据卡在如下不动了

U-Boot SPL 2018.01-07886-g9716979100-dirty (Mar 29 2018 - 19:56:32)
DRAM: 32 MiB
Trying to boot from sunxi SPI

\ | /
- RT -     Thread Operating System
/ | \     3.0.3 build Apr  5 2018
2006 - 2018 Copyright by rt-thread team
[SFUD]gd25qxx flash device is initialize success.
[Flash](packages/EasyFlash/src/ef_env.c:144) ENV start address is 0x00000000, size is 1024 bytes.
[Flash](packages/EasyFlash/src/ef_env.c:768) Calculate ENV CRC32 number is 0x9E9F4976.
[Flash](packages/EasyFlash/src/ef_env.c:780) Verify ENV CRC32 result is OK.
[Flash]EasyFlash V3.0.4 is initialize success.
[Flash]You can get the latest version on https://github.com/armink/EasyFlash .

照理说会出现倒数，倒数时间内输入任意按键可以使用RTATO工具下载的。
但我死活不倒数