keil5出现的警告解决方法：equality comparison with extraneous parentheses

转载：https://blog.csdn.net/weixin_39674445/article/details/97371694

if ((r == STM32_ACK)) {}

警告：equality comparison with extraneous parentheses
原因：在MDK中出现equality comparison with extraneous parentheses这样的黄色三角警告，代表括号有重复多余的情况。
解决方法：

if (r == STM32_ACK) {}