Once the SW I/O is released by the user software, the GPIO controller takes control of these
pins. The reset states of the GPIO control registers put the I/Os in the equivalent states:
• SWDIO: input pull-up
• SWCLK: input pull-down
Having embedded pull-up and pull-down resistors removes the need to add external
resistors.
{var%20f='http://v.t.sina.com.cn/share/share.php?appkey=1515056452',u=z||d.location,p=['&url=',e(u),'&title=',e(t||d.title),'&source=',e(r),'&sourceUrl=',e(l),'&content=',c||'gb2312','&pic=',e(p||'')].join('');function%20a(){if(!window.open([f,p].join(''),'mb',['toolbar=0,status=0,resizable=1,width=440,height=430,left=',(s.width-440)/2,',top=',(s.height-430)/2].join('')))u.href=[f,p].join('');};if(/Firefox/.test(navigator.userAgent))setTimeout(a,0);else%20a();})(screen,document,encodeURIComponent,'','','https://www.xiaopingtou.cn/data/attach/logo/logo.png', '推荐 一巷清苑 的问题《请问STM32F030的SWD口如何做普通IO》','https://www.xiaopingtou.cn/q-27926.html','页面编码gb2312|utf-8默认gb2312'));){kind=link}
pins. The reset states of the GPIO control registers put the I/Os in the equivalent states:
• SWDIO: input pull-up
• SWCLK: input pull-down
Having embedded pull-up and pull-down resistors removes the need to add external
resistors.
F0参考手册，如2楼所说，你需要释放掉SWD功能
把它做普通IO配置就好了。具体就是将GPIOX_MODER寄存器相关位做配置就好，比STM32F1配置更为简洁。
一周热门 更多>