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Merge pull request #6081 from Sebastianv650/MIN_STEPPER_PULSE_for_Babystepping

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Add MINIMUM_STEPPER_PULSE ability to babystepping
This commit is contained in:
Scott Lahteine 2017-03-22 21:57:36 -05:00 committed by GitHub
commit 782634b6c9
1 changed files with 48 additions and 9 deletions
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55
Marlin/stepper.cpp
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@ -1231,17 +1231,18 @@ void Stepper::report_positions() {
#if ENABLED(BABYSTEPPING)
#define CYCLES_EATEN_BY_BABYSTEP 60
#define _ENABLE(axis) enable_## axis()
#define _READ_DIR(AXIS) AXIS ##_DIR_READ
#define _INVERT_DIR(AXIS) INVERT_## AXIS ##_DIR
#define _APPLY_DIR(AXIS, INVERT) AXIS ##_APPLY_DIR(INVERT, true)
#define BABYSTEP_AXIS(axis, AXIS, INVERT) { \
_ENABLE(axis); \
uint8_t old_pin = _READ_DIR(AXIS); \
#define START_BABYSTEP_AXIS(AXIS, INVERT) { \
_APPLY_DIR(AXIS, _INVERT_DIR(AXIS)^direction^INVERT); \
_APPLY_STEP(AXIS)(!_INVERT_STEP_PIN(AXIS), true); \
delayMicroseconds(2); \
}
#define STOP_BABYSTEP_AXIS(AXIS) { \
_APPLY_STEP(AXIS)(_INVERT_STEP_PIN(AXIS), true); \
_APPLY_DIR(AXIS, old_pin); \
}
@ -1249,22 +1250,54 @@ void Stepper::report_positions() {
// MUST ONLY BE CALLED BY AN ISR,
// No other ISR should ever interrupt this!
void Stepper::babystep(const AxisEnum axis, const bool direction) {
cli();
static uint8_t old_pin;
#if STEP_PULSE_CYCLES > CYCLES_EATEN_BY_BABYSTEP
static uint32_t pulse_start;
#endif
switch (axis) {
case X_AXIS:
BABYSTEP_AXIS(x, X, false);
_ENABLE(x);
old_pin = _READ_DIR(X);
#if STEP_PULSE_CYCLES > CYCLES_EATEN_BY_BABYSTEP
pulse_start = TCNT0;
#endif \
START_BABYSTEP_AXIS(X, false);
#if STEP_PULSE_CYCLES > CYCLES_EATEN_BY_BABYSTEP
while ((uint32_t)(TCNT0 - pulse_start) < STEP_PULSE_CYCLES - CYCLES_EATEN_BY_BABYSTEP) { /* nada */ }
#endif
STOP_BABYSTEP_AXIS(X);
break;
case Y_AXIS:
BABYSTEP_AXIS(y, Y, false);
_ENABLE(y);
old_pin = _READ_DIR(Y);
#if STEP_PULSE_CYCLES > CYCLES_EATEN_BY_BABYSTEP
pulse_start = TCNT0;
#endif
START_BABYSTEP_AXIS(Y, false);
#if STEP_PULSE_CYCLES > CYCLES_EATEN_BY_BABYSTEP
while ((uint32_t)(TCNT0 - pulse_start) < STEP_PULSE_CYCLES - CYCLES_EATEN_BY_BABYSTEP) { /* nada */ }
#endif
STOP_BABYSTEP_AXIS(Y);
break;
case Z_AXIS: {
#if DISABLED(DELTA)
BABYSTEP_AXIS(z, Z, BABYSTEP_INVERT_Z);
_ENABLE(z);
old_pin = _READ_DIR(Z);
#if STEP_PULSE_CYCLES > CYCLES_EATEN_BY_BABYSTEP
pulse_start = TCNT0;
#endif
START_BABYSTEP_AXIS(Z, BABYSTEP_INVERT_Z);
#if STEP_PULSE_CYCLES > CYCLES_EATEN_BY_BABYSTEP
while ((uint32_t)(TCNT0 - pulse_start) < STEP_PULSE_CYCLES - CYCLES_EATEN_BY_BABYSTEP) { /* nada */ }
#endif
STOP_BABYSTEP_AXIS(Z);
#else // DELTA
@ -1281,10 +1314,15 @@ void Stepper::report_positions() {
Y_DIR_WRITE(INVERT_Y_DIR ^ z_direction);
Z_DIR_WRITE(INVERT_Z_DIR ^ z_direction);
//perform step
#if STEP_PULSE_CYCLES > CYCLES_EATEN_BY_BABYSTEP
pulse_start = TCNT0;
#endif
X_STEP_WRITE(!INVERT_X_STEP_PIN);
Y_STEP_WRITE(!INVERT_Y_STEP_PIN);
Z_STEP_WRITE(!INVERT_Z_STEP_PIN);
delayMicroseconds(2);
#if STEP_PULSE_CYCLES > CYCLES_EATEN_BY_BABYSTEP
while ((uint32_t)(TCNT0 - pulse_start) < STEP_PULSE_CYCLES - CYCLES_EATEN_BY_BABYSTEP) { /* nada */ }
#endif
X_STEP_WRITE(INVERT_X_STEP_PIN);
Y_STEP_WRITE(INVERT_Y_STEP_PIN);
Z_STEP_WRITE(INVERT_Z_STEP_PIN);
@ -1299,6 +1337,7 @@ void Stepper::report_positions() {
default: break;
}
sei();
}
#endif //BABYSTEPPING