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OUTPUT the Clock named as MCO IN STM32

配置PB3为Alternate Function 配置输出模式 如何确定端口和PIN地址? GPIOBBASE = 0X40010C00; (GPIOBBASE + 0X00) |= unint32_t(0X0) << 12; /配置CNF3,pp模式/ 运算符优先级:赋值运算符最后 < 移位运算 < 一元运算符 < 后缀运算符 (GPIOBBASE + 0X00ul) |= unint32_t(0X11UL) <