仿真STC单片机时出现Connection to target system lost问题解决办法
本帖最后由 沈洁 于 2023-7-7 10:50 编辑最近使用串口仿真STC单片机时出现Connection to target system lost报错。始终找不到原因
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
百度上搜索,得到的是P3.0和P3.1要设置成默认的双向端口。
检查代码并没有问题
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
进一步检查,发现,原来是IRC的默认频率设置出现了问题
说一下具体原因吧
这里是串口仿真,既然用到串口,串口就需要从系统时钟计算匹配寄存器用来实现指定的波特率
STC单片机,默认的IRC是11.0592Mhz的频率。但是我使用了26Mhz的外部晶体。单片机启动过程中有一个切换频率的问题。无论如何串口匹配值只能匹配一个频率。具体是11.0592还是26Mhz系统就为难了。这个时候,仿真就崩了。因为串口失步了。
解决方案就是把IRC的默认频率设置成和外部晶体一致的频率下载仿真程序,这样就不存在任何的问题了。
感谢大佬分享仿真经验~
{:4_250:} 如果没有外部晶振,要怎么配置的啊? 南太平洋飞鱼 发表于 2024-9-5 14:13
如果没有外部晶振,要怎么配置的啊?
要用多少就配置多少。 这个IRC的默认频率是通过程序中的寄存器命令来控制的,还是怎么设置的? 我的可以了,点击ISP软件上的"'将所选目标单片机设置为仿真芯片"按钮。这个是灰色的,刚使用的人可以不会注意到。然后把工程全部编译重建,不要下载,设置好仿真参数后直接点KEIL上的仿真就可以了。
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