您好，该怎样查看Arduino中的子函数例如pinMode()的源代码？

Question

怎样查看Arduino中的子函数例如pinMode()的源代码？麻烦举例子，帮忙看看！

Answer 1

D:\Program Files\Arduino\hardware\arduino\cores\arduino的wiring_digital.c文件或D:\Program Files\Arduino\hardware\arduino\cores\robot的wiring_digital.c文件#define ARDUINO_MAIN#include "wiring_private.h"#include "pins_arduino.h"  void pinMode(uint8_t pin, uint8_t mode){         uint8_tbit = digitalPinToBitMask(pin);         uint8_tport = digitalPinToPort(pin);         volatileuint8_t *reg, *out;           if(port == NOT_A_PIN) return;           //JWS: can I let the optimizer do this?         reg= portModeRegister(port);         out= portOutputRegister(port);           if(mode == INPUT) {                   uint8_toldSREG = SREG;                cli();                   *reg&= ~bit;                   *out&= ~bit;                   SREG= oldSREG;         }else if (mode == INPUT_PULLUP) {                   uint8_toldSREG = SREG;                cli();                   *reg&= ~bit;                   *out|= bit;                   SREG= oldSREG;         }else {                   uint8_toldSREG = SREG;                cli();                   *reg|= bit;                   SREG= oldSREG;         }}

Answer 2

盘符:\Program Files\Arduino\hardware\arduino\avr\cores\arduino 目前最新版本（1.8.4）的核心底层代码在这里。arduino更新了。