shjuturt 发表于 2022-8-31 19:20

STM32HAL 库中的函数名有些前面带下划线,有些不带

有2个问题不明白:
1.例如:__HAL_UART_DISABLE(huart);这个函数 名前有下横线,它与函数名前面不带下横线的函数相比有什么区别?
2. http://data:image/png;base64,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参数VAL 下有横线,这表示什么意思?

请高手给与解答,谢谢!

knk 发表于 2022-9-14 23:47

这种一般是宏定义,算不上真正的函数

LOVEEVER 发表于 2022-9-15 18:09

学习到了!宏定义就是一个别名吧,是不是这个也可以呀?

捧一束彼岸花 发表于 2022-9-16 15:01

这个好像是有点说法,就是弱定义还是啥来着

西洲 发表于 2022-9-16 15:23

忘记了,这个跟C语言有关系的

她已醉 发表于 2022-9-16 15:45

这算是系统定义的名字吧

我吃小朋友 发表于 2022-9-16 16:06

来参考一下这里,https://www.cnblogs.com/icaowu/p/16328737.html

在曼谷的春 发表于 2022-9-16 16:28

这个C语言语法问题,好好学哦

一只眠羊 发表于 2022-9-16 16:49

没弄过,但是这都是系统定义的,正常我们是不会这么写的

月亮一键变蓝 发表于 2022-9-16 17:11

网上说是私有类型,只允许本身访问耶

将爱藏于深海 发表于 2022-9-16 17:33

属实没有深入研究过,楼主知道是啥含义了不

温室雏菊 发表于 2022-9-16 17:55

你可以去掉这两个下划线,看看功能是否一致呗

故意相遇 发表于 2022-9-16 18:16

区别好像是跟访问有关系吧


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