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libunwind：记录程序崩溃堆栈 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...togen.sh
./configure --prefix=/usr --enable-shared #编译成.so，否则默认静态.la
make
make install
记录堆栈的代码如下：
static void log_backtrace(void) {
char name[256];
unw_cursor_t cursor;
unw_context_t uc;
unw_word_t ip, sp, offp;
unw_getcontext(&uc);
unw_i...
BLE（五）移动端工具 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...来进行设置的
另外如果没有bt_stack.conf文件，设备也会在默认路径下生成日志：/data/misc/bluetooth/logs/btsnoop_hci.log
之后导出到wireshark查看即可，如图清晰的展示了蓝牙各协议栈的内容，分析时候重点关注发送的数据内容即Handle、uu...
nFC Connect低功耗蓝牙APP工具的使用 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...性发送多条点击ADD VALUE添加。选择输入数据的格式，一般默认格式不用选择。可以先在SAVE AS里指令名，再点SAVE保存，下次可以直接在LOAD里发送该数据包。
五、监听响应
点击图标“↓↓↓”后，APP后台自动监听从设备notif...
请问输入文件要往哪放? - App应用开发 - 清泛IT社区，为创新赋能！
...。APP Inventor有没有可能允许将文件存在 ...
1、文件管理器默认范围为App，读写文件名诸如 "test.txt"，就是在这个目录下：（上面是AI伴侣的App目录，如果最终编译apk运行，则到 appinventor.ai_[账户名].[项目名] 目录下查看文件...
Modbus硬件控制01——什么是Modbus - 创客硬件开发 - 清泛IT社区，为创新赋能！
...RTU协议设备必须要有RTU协议！这是Modbus协议上规定的，且默认模式必须是RTU，ASCII作为选项。（也就是说，一般的设备只有RTU这个协议，ASCII一般很少）所以说，一般学习Modbus协议，只需要了解RTU的协议，ASCII作为学习的了解就足...
Modbus硬件控制02——modbus继电器 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...过485通信口进行设置，且可通过产品上的按键进行重置为默认设置，即为9600波特率，8个数据位，偶校验，1个停止位。
二、模块功能
本模块具备一路数字输入和一路数字输出，还具备一个标准的 RS-485 通讯接口，通信使用MODB...
Status bar and navigation bar appear over my view's bounds in iOS 7
...ons.
Using View Controllers
In iOS 7, view controllers use full-screen layout. At the same time,
iOS 7 gives you more granular control over the way a view controller
lays out its views. In particular, the concept of full-screen layout
has been refined to let a view controller specif...
IllegalStateException: Can not perform this action after onSaveInstanceState with ViewPager
... of onStop, that line of code wont do things and thus show nothing on your screen. When users come back to the application, they will see an empty screen, that's the empty host activity showing no fragments at all. It's bad experience(yeah a little bit better than a crash).
So here I wish there cou...
Changing the status bar text color in splash screen iOS 7
...
@Yasmin : to changer color AFTER the splash screen, this solution was already part of the question ;)
– Vinzzz
May 4 '15 at 17:01
...
How to detect that animation has ended on UITableView beginUpdates/endUpdates?
...lso get called when a cell that is already in the table moves from off the screen to on the screen so it may not be exactly what you are looking for. I just looked through all the UITableView and UIScrollView delegate methods and there doesnt appear to be anything to handle just after a cell is ins...