~菡萏非草水中生 发表于 2014-8-27 12:20:06

GRBL 源文件编程求助

// NOTE: All step bit and direction pins must be on the same port.
#define STEPPING_DDR       DDRD
#define STEPPING_PORT      PORTD
#define X_STEP_BIT         2// Uno Digital Pin 2
#define Y_STEP_BIT         3// Uno Digital Pin 3
#define Z_STEP_BIT         4// Uno Digital Pin 4
#define X_DIRECTION_BIT    5// Uno Digital Pin 5
#define Y_DIRECTION_BIT    6// Uno Digital Pin 6
#define Z_DIRECTION_BIT    7// Uno Digital Pin 7
#define STEP_MASK ((1<<X_STEP_BIT)|(1<<Y_STEP_BIT)|(1<<Z_STEP_BIT)) // All step bits
#define DIRECTION_MASK ((1<<X_DIRECTION_BIT)|(1<<Y_DIRECTION_BIT)|(1<<Z_DIRECTION_BIT)) // All direction bits
#define STEPPING_MASK (STEP_MASK | DIRECTION_MASK) // All stepping-related bits (step/direction)

#define STEPPERS_DISABLE_DDR    DDRB
#define STEPPERS_DISABLE_PORT   PORTB
#define STEPPERS_DISABLE_BIT    0// Uno Digital Pin 8
#define STEPPERS_DISABLE_MASK (1<<STEPPERS_DISABLE_BIT)

// NOTE: All limit bit pins must be on the same port
#define LIMIT_DDR       DDRB
#define LIMIT_PIN       PINB
#define LIMIT_PORT      PORTB
#define X_LIMIT_BIT   1// Uno Digital Pin 9
#define Y_LIMIT_BIT   2// Uno Digital Pin 10
#define Z_LIMIT_BIT   3// Uno Digital Pin 11
#define LIMIT_INT       PCIE0// Pin change interrupt enable pin
#define LIMIT_INT_vectPCINT0_vect
#define LIMIT_PCMSK   PCMSK0 // Pin change interrupt register
#define LIMIT_MASK ((1<<X_LIMIT_BIT)|(1<<Y_LIMIT_BIT)|(1<<Z_LIMIT_BIT)) // All limit bits

#define SPINDLE_ENABLE_DDR   DDRB
#define SPINDLE_ENABLE_PORTPORTB
#define SPINDLE_ENABLE_BIT   4// Uno Digital Pin 12

#define SPINDLE_DIRECTION_DDR   DDRB
#define SPINDLE_DIRECTION_PORTPORTB
#define SPINDLE_DIRECTION_BIT   5// Uno Digital Pin 13 (NOTE: D13 can't be pulled-high input due to LED.)

#define COOLANT_FLOOD_DDR   DDRC
#define COOLANT_FLOOD_PORTPORTC
#define COOLANT_FLOOD_BIT   3// Uno Analog Pin 3



2号点和3号点 又输出也当输入？？？？？重复利用？？

wldk 发表于 2014-9-14 22:31:34

要看//后的Uno Digital Pin
#define Y_LIMIT_BIT   2是指PB的2      即Uno Digital Pin 10

#define X_STEP_BIT         2是指PD的2      即 Uno Digital Pin 2

wzqqwz 发表于 2019-7-27 12:11:09

DDRD DDRB这些是什么意思啊？

#define X_LIMIT_BIT   1// Uno Digital Pin 9
#define Y_LIMIT_BIT   2// Uno Digital Pin 10
#define Z_LIMIT_BIT   3// Uno Digital Pin 11

为什么 X_LIMIT_BIT   1是Pin 9？
看了很久，看不懂啊！！

秋叶秋衣 发表于 2019-7-28 12:43:13

虽然注释部分不重要但是还是建议读一下cpu_map.h里有这样一段话
/* The cpu_map.h files serve as a central pin mapping selection file for different
   processor types or alternative pin layouts. This version of Grbl officially supports
   only the Arduino Mega328p. */
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