STM32之GPIO笔记

STM32的输入输出管脚有下面8种可能的配置：（4输入+2输出+2复用输出）

① 浮空输入_IN_FLOATING

② 带上拉输入_IPU

③ 带下拉输入_IPD

④ 模拟输入_AIN

⑤ 开漏输出_OUT_OD

⑥ 推挽输出_OUT_PP

⑦ 复用功能的推挽输出_AF_PP

⑧ 复用功能的开漏输出_AF_OD-The STM32 the GPIO notes the STM32 the input output pins following eight kinds of possible configurations: (4 input+2 output+2 multiplexed output) (1) Floating input _IN_FLOATING (2) with pull-input _IPU ③ with the drop-down input _IPD ④ simulation push-pull output for input _AIN ⑤ open-drain output _OUT_OD (6) push-pull output _OUT_PP ⑦ multiplexing function _AF_PP ⑧ reuse open-drain output _AF_OD