Keil屏蔽指定的警告信息

一、使用keil5.37使用自身库生成代码编译提示：

warning: cast from 'uint8_t *' (aka 'unsigned char *') to 'uint16_t *' (aka 'unsigned short *') increases required alignment from 1 to 2 [-Wcast-align]

去除方法：

在Misc Controls中填写屏蔽标记

二、屏蔽标记

   1. could be declared with attribute 'noreturn' [-Wmissing-noreturn]

   2. UDP_Socket.c(15): warning: no previous prototype for function 'udp_cb_func' [-Wmissing-prototypes]

   3. warning: cast from 'uint8_t *' (aka 'unsigned char *') to 'uint16_t *' (aka 'unsigned short *') increases required alignment from 1 to 2 [-Wcast-align]

   4. warning: padding struct 'struct __DMA_HandleTypeDef' with 2 bytes to align 'Parent' [-Wpadded]

   5. warning: implicit conversion loses integer precision: 'uint32_t' (aka 'unsigned int') to 'uint8_t' (aka 'unsigned char') [-Wimplicit-int-conversion]

略......

在每个警告末尾都会提示出警告使用的flag，将flag加入no-后，放入Misc Controls中即可屏蔽该类型警告提示信息。

如修改为：

-Wno-missing-noreturn

-Wno-missing-prototypes

-Wno-cast-align

-Wno-padded

-Wno-implicit-int-conversion

-Wno-unused-parameter