STM32 CUBEMX HAL PS2数据读取并解析 硬件SPI
PS2 由手柄与接收器两部分组成，手柄主要负责发送按键信息。接通电源并打开手柄开关时，手柄与接收器自动配对连接，在未配对成功的状态下，接收器绿灯闪烁，手柄上的灯也会闪烁，配对成功后，接收器上绿灯常亮，手柄上灯也常亮，这时可以按“MODE”键，选择手柄发送模式。
红灯模式：遥杆输出模拟值； 绿灯模式：遥杆对应上面四个按键，只有四个极限方向对应。接收器和主机（单片机）相连，实现主机与手柄之间的通讯。当主机想读手柄数据时，将会拉低 CS 线电平，并发出一个命令“0x01”；手柄会回复它的 ID“0x41=模拟绿灯，0x73=模拟红灯”；在手柄发送 ID 的同时，主机将传送 0x42，请求数据；随后手柄发送出 0x5A，告诉主机“数据来了”。数据格式及意义如图
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原文链接：https://blog.csdn.net/m0_62524451/artic
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