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Added ways to free up more I/O pins

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- Any step or direction pin can be commented out if you don't plan to use it
- Spindle pin can now be commented out
This commit is contained in:
bdring
2018-09-13 17:13:49 -05:00
parent 5bfeae4724
commit a443cd6a3b
4 changed files with 82 additions and 34 deletions
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26
Grbl_Esp32/cpu_map.h
View File

@@ -38,23 +38,29 @@
// This is the CPU Map for the ESP32 CNC Controller R2
// It is OK to comment out any step and direction pins. This
// won't affect operation except that there will be no output
// form the pins. Grbl will virtually move the axis. This could
// be handy if you are using a servo, etc. for another axis.
#define X_STEP_PIN GPIO_NUM_12
#define Y_STEP_PIN GPIO_NUM_14
#define Z_STEP_PIN GPIO_NUM_27
#define STEP_MASK B111 // don't change
#define X_STEP_BIT 0
#define Y_STEP_BIT 1
#define Z_STEP_BIT 2
#define X_STEP_BIT 0 // don't change
#define Y_STEP_BIT 1 // don't change
#define Z_STEP_BIT 2 // don't change
#define X_DIRECTION_BIT 0
#define Y_DIRECTION_BIT 1
#define Z_DIRECTION_BIT 2
#define X_DIRECTION_BIT 0 // don't change
#define Y_DIRECTION_BIT 1 // don't change
#define Z_DIRECTION_BIT 2 // don't change
#define X_DIRECTION_PIN GPIO_NUM_26
#define Y_DIRECTION_PIN GPIO_NUM_25
#define Z_DIRECTION_PIN GPIO_NUM_33
// OK to comment out to use pin for other features
#define STEPPERS_DISABLE_PIN GPIO_NUM_13
@@ -63,6 +69,8 @@
#define COOLANT_FLOOD_PIN GPIO_NUM_16
//#define COOLANT_MIST_PIN GPIO_NUM_21
// If SPINDLE_PWM_PIN is commented out, this frees up the pin, but Grbl will still
// use a virtual spindle. Do not comment out the other parameters for the spindle.
#define SPINDLE_PWM_PIN GPIO_NUM_17
#define SPINDLE_PWM_CHANNEL 0
#define SPINDLE_PWM_BASE_FREQ 5000 // Hz
@@ -76,9 +84,9 @@
//#define SPINDLE_ENABLE_PIN GPIO_NUM_16
//#define SPINDLE_DIR_PIN GPIO_NUM_16
#define X_LIMIT_BIT 0
#define Y_LIMIT_BIT 1
#define Z_LIMIT_BIT 2
#define X_LIMIT_BIT 0 // don't change
#define Y_LIMIT_BIT 1 // don't change
#define Z_LIMIT_BIT 2 // don't change
#define X_LIMIT_PIN GPIO_NUM_2
#define Y_LIMIT_PIN GPIO_NUM_4

4
Grbl_Esp32/settings.cpp
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@@ -332,8 +332,6 @@ uint8_t get_step_pin_mask(uint8_t axis_idx)
// Returns direction pin mask according to Grbl internal axis indexing.
uint8_t get_direction_pin_mask(uint8_t axis_idx)
{
if ( axis_idx == X_AXIS ) { return((1<<X_DIRECTION_BIT)); }
if ( axis_idx == Y_AXIS ) { return((1<<Y_DIRECTION_BIT)); }
return((1<<Z_DIRECTION_BIT));
return(1<<axis_idx);
}

14
Grbl_Esp32/spindle_control.cpp
View File

@@ -32,9 +32,11 @@ void spindle_init()
pinMode(SPINDLE_DIR_PIN, OUTPUT);
#endif
#ifdef SPINDLE_PWM_PIN
// use the LED control feature to setup PWM https://esp-idf.readthedocs.io/en/v1.0/api/ledc.html
ledcSetup(SPINDLE_PWM_CHANNEL, SPINDLE_PWM_BASE_FREQ, SPINDLE_PWM_BIT_PRECISION); // setup the channel
ledcAttachPin(SPINDLE_PWM_PIN, SPINDLE_PWM_CHANNEL); // attach the PWM to the pin
#endif
// Start with spindle off off
spindle_stop();
@@ -43,12 +45,18 @@ void spindle_init()
void spindle_stop()
{
spindle_set_enable(false);
grbl_analogWrite(SPINDLE_PWM_CHANNEL, 0);
#ifdef SPINDLE_PWM_PIN
grbl_analogWrite(SPINDLE_PWM_CHANNEL, 0);
#endif
}
uint8_t spindle_get_state() // returns SPINDLE_STATE_DISABLE, SPINDLE_STATE_CW or SPINDLE_STATE_CCW
{
// TODO Update this when direction and enable pin are added
#ifndef SPINDLE_PWM_PIN
return(SPINDLE_STATE_DISABLE);
#endif
if (ledcRead(SPINDLE_PWM_CHANNEL) == 0) // Check the PWM value
return(SPINDLE_STATE_DISABLE);
else
@@ -66,6 +74,10 @@ uint8_t spindle_get_state() // returns SPINDLE_STATE_DISABLE, SPINDLE_STATE_CW
void spindle_set_speed(uint8_t pwm_value)
{
#ifndef SPINDLE_PWM_PIN
return;
#endif
#ifndef SPINDLE_ENABLE_OFF_WITH_ZERO_SPEED
spindle_set_enable(true);
#else

58
Grbl_Esp32/stepper.cpp
View File

@@ -341,17 +341,31 @@ void stepper_init()
{
// make the direction pins outputs
pinMode(X_DIRECTION_PIN, OUTPUT);
pinMode(Y_DIRECTION_PIN, OUTPUT);
pinMode(Z_DIRECTION_PIN, OUTPUT);
#ifdef X_DIRECTION_PIN
pinMode(X_DIRECTION_PIN, OUTPUT);
#endif
#ifdef Y_DIRECTION_PIN
pinMode(Y_DIRECTION_PIN, OUTPUT);
#endif
#ifdef Z_DIRECTION_PIN
pinMode(Z_DIRECTION_PIN, OUTPUT);
#endif
// make the step pins outputs
pinMode(X_STEP_PIN, OUTPUT);
pinMode(Y_STEP_PIN, OUTPUT);
pinMode(Z_STEP_PIN, OUTPUT);
#ifdef X_STEP_PIN
pinMode(X_STEP_PIN, OUTPUT);
#endif
#ifdef Y_STEP_PIN
pinMode(Y_STEP_PIN, OUTPUT);
#endif
#ifdef Z_STEP_PIN
pinMode(Z_STEP_PIN, OUTPUT);
#endif
// make the stepper disable pin an output
pinMode(STEPPERS_DISABLE_PIN, OUTPUT);
#ifdef STEPPERS_DISABLE_PIN
pinMode(STEPPERS_DISABLE_PIN, OUTPUT);
#endif
// setup stepper timer interrupt
@@ -444,17 +458,30 @@ void st_reset()
void set_direction_pins_on(uint8_t onMask)
{
// inverts are applied in step generation
digitalWrite(X_DIRECTION_PIN, (onMask & (1<<X_AXIS)));
digitalWrite(Y_DIRECTION_PIN, (onMask & (1<<Y_AXIS)));
digitalWrite(Z_DIRECTION_PIN, (onMask & (1<<Z_AXIS)));
#ifdef X_DIRECTION_PIN
digitalWrite(X_DIRECTION_PIN, (onMask & (1<<X_AXIS)));
#endif
#ifdef Y_DIRECTION_PIN
digitalWrite(Y_DIRECTION_PIN, (onMask & (1<<Y_AXIS)));
#endif
#ifdef Z_DIRECTION_PIN
digitalWrite(Z_DIRECTION_PIN, (onMask & (1<<Z_AXIS)));
#endif
}
void set_stepper_pins_on(uint8_t onMask)
{
onMask ^= settings.step_invert_mask; // invert pins as required by invert mask
digitalWrite(X_STEP_PIN, (onMask & (1<<X_AXIS)));
digitalWrite(Y_STEP_PIN, (onMask & (1<<Y_AXIS)));
digitalWrite(Z_STEP_PIN, (onMask & (1<<Z_AXIS)));
#ifdef X_STEP_PIN
digitalWrite(X_STEP_PIN, (onMask & (1<<X_AXIS)));
#endif
#ifdef Y_STEP_PIN
digitalWrite(Y_STEP_PIN, (onMask & (1<<Y_AXIS)));
#endif
#ifdef Z_STEP_PIN
digitalWrite(Z_STEP_PIN, (onMask & (1<<Z_AXIS)));
#endif
}
@@ -1027,7 +1054,10 @@ void IRAM_ATTR Stepper_Timer_Stop()
void set_stepper_disable(uint8_t isOn) // isOn = true // to disable
{
if (bit_istrue(settings.flags,BITFLAG_INVERT_ST_ENABLE)) { isOn = !isOn; } // Apply pin invert.
digitalWrite(STEPPERS_DISABLE_PIN, isOn );
#ifdef STEPPERS_DISABLE_PIN
digitalWrite(STEPPERS_DISABLE_PIN, isOn );
#endif
}