《8051U深度入门到32位51大型实战视频》,【免费 + 包邮 送】实验箱@Ai8051U，100万套

论文给***

Ai比stm32功能强大太多了，必须支持

sunca***

很早以前就学习了51单片机，在ARM流行的年代，STC的51单片机，重复赋予51 单片机强大的功能，高兴啊。

sunca***

这款51单片机有没有图形化的设计工具？

flpw***

打卡，学习

flpw***

学习学习

flpw***

打卡打卡

qishi***

学习打卡

九牛***

期待已久的大作终于来了，支持STC

cary***

冲哥第五集程序，我也遇到了这个编译问题，求助论坛： 附件：示例代码.zip

Rebuild started: Project: demo
Rebuild target 'Target 1'
compiling main.c...
linking...
*** ERROR L127: UNRESOLVED EXTERNAL SYMBOL
SYMBOL: printf_hid
MODULE: .\Objects\main.obj (main)
*** ERROR L127: UNRESOLVED EXTERNAL SYMBOL
SYMBOL: ?printf_hid?BYTE
MODULE: .\Objects\main.obj (main)
*** ERROR L127: UNRESOLVED EXTERNAL SYMBOL
SYMBOL: usb_OUT_done
MODULE: .\Objects\main.obj (main)
*** ERROR L127: UNRESOLVED EXTERNAL SYMBOL
SYMBOL: bUsbOutReady
MODULE: .\Objects\main.obj (main)
*** ERROR L127: UNRESOLVED EXTERNAL SYMBOL
SYMBOL: DeviceState
MODULE: .\Objects\main.obj (main)
*** ERROR L127: UNRESOLVED EXTERNAL SYMBOL
SYMBOL: usb_init
MODULE: .\Objects\main.obj (main)
*** ERROR L128: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL: usb_init
MODULE: .\Objects\main.obj (main)
ADDRESS: FF0037H
*** ERROR L128: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL: DeviceState
MODULE: .\Objects\main.obj (main)
ADDRESS: FF0040H
*** ERROR L128: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL: bUsbOutReady
MODULE: .\Objects\main.obj (main)
ADDRESS: FF0046H
*** ERROR L128: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL: printf_hid
MODULE: .\Objects\main.obj (main)
ADDRESS: FF005DH
*** ERROR L128: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL: usb_OUT_done
MODULE: .\Objects\main.obj (main)
ADDRESS: FF0060H
Program Size: data=8.0 edata+hdata=270 xdata=0 const=56 code=163
Target not created.
Build Time Elapsed: 00:00:02

问题原因终于找到了。

右键 stc_usb_cdc_32.LIB，打开Options for File 'stc_usb_cdc_32.LIB'，发现File Type居然是Image file。改成Library file，问题解决。

不知道是按了什么组合键还是什么原因，文件类型怎么会是Image file呢？匪夷所思。

zhangr***