我正在运行包括安装和卸载USB设备的测试.
该测试在Linux和Windows上运行.Linux显然不是一个问题,但有没有办法,最好通过Python,在Windows上执行此操作？或者更好的是,是否存在交叉兼容的库,并且每个操作系统都会这样做？
我从分析工具中收到以下警告，Composite expression assigned to a wider essential type
这是代码：
uint32_t result;
uint8_t resolution;
result = 1U << resolution;
我尝试了以下方法：
#define SHIFT_BY_ONE (uint8_t)1
result = SHIFT_BY_ONE << resolution;
但这会引发此警告，Shift left of signed quantity (int)
所以我想我无法正确理解该问题。如何解决此错误？
升级到ubuntu 18.04之后，我无法再编译我的应用程序。我正在将mbed-cli与st核子板一起使用。这是命令的输出mbed compile
[Warning] test.c@1926,32: unknown option after '#pragma GCC diagnostic' kind [-Wpragmas]
Link: sensors
/usr/lib/gcc/arm-none-eabi/6.3.1/../../../arm-none-eabi/bin/ld: error: /usr/lib/gcc/arm-none-eabi/6.3.1/../../../arm-none-eabi/lib/crt0.o: Conflicting CPU architectures 13/1
/usr/lib/gcc/arm-none-eabi/6.3.1/../../../arm-none-eabi/bin/ld: failed to merge target specific data of file /usr/lib/gcc/arm-none-eabi/6.3.1/../../../arm-none-eabi/lib/crt0.o
/usr/lib/gcc/arm-none-eabi/6.3.1/../../../arm-none-eabi/bin/ld: error: /usr/lib/gcc/arm-none-eabi/6.3.1/../../../arm-none-eabi/lib/libc.a(lib_a-setjmp.o): Conflicting CPU architectures 13/1
/usr/lib/gcc/arm-none-eabi/6.3.1/../../../arm-none-eabi/bin/ld: failed to merge target specific data of file /usr/lib/gcc/arm-none-eabi/6.3.1/../../../arm-none-eabi/lib/libc.a(lib_a-setjmp.o)
collect2: error: ld returned 1 exit status
[ERROR] /usr/lib/gcc/arm-none-eabi/6.3.1/../../../arm-none-eabi/bin/ld: error: /usr/lib/gcc/arm-none-eabi/6.3.1/../../../arm-none-eabi/lib/crt0.o: Conflicting CPU architectures 13/1
/usr/lib/gcc/arm-none-eabi/6.3.1/../../../arm-none-eabi/bin/ld: failed to merge target specific data of file /usr/lib/gcc/arm-none-eabi/6.3.1/../../../arm-none-eabi/lib/crt0.o
/usr/lib/gcc/arm-none-eabi/6.3.1/../../../arm-none-eabi/bin/ld: error: /usr/lib/gcc/arm-none-eabi/6.3.1/../../../arm-none-eabi/lib/libc.a(lib_a-setjmp.o): Conflicting CPU …我需要使用mbed api但仅限于使用C.我如何在ac文件中使用例如SPI类.从在线查看使用C++类,您应该在C++中创建一个包装器函数,但正如我所说的,我不能使用C++,这是他们的另一种解决方法吗？