From 7dc03ce721bdf7577b78d29205d030c45d50b7f5 Mon Sep 17 00:00:00 2001
From: Scott Lahteine <github@thinkyhead.com>
Date: Sat, 19 May 2018 17:26:11 -0500
Subject: [PATCH] Simplified fix for babystep pulse width
Alternative to the apparently superfluous double delay
---
Marlin/src/module/stepper.cpp | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/Marlin/src/module/stepper.cpp b/Marlin/src/module/stepper.cpp
index ed41390866..baa50c2992 100644
--- a/Marlin/src/module/stepper.cpp
+++ b/Marlin/src/module/stepper.cpp
@@ -2136,8 +2136,7 @@ void Stepper::report_positions() {
#define _APPLY_DIR(AXIS, INVERT) AXIS ##_APPLY_DIR(INVERT, true)
#if EXTRA_CYCLES_BABYSTEP > 20
- hal_timer_t pulse_start;
- #define _SAVE_START pulse_start = HAL_timer_get_count(STEP_TIMER_NUM)
+ #define _SAVE_START const hal_timer_t pulse_start = HAL_timer_get_count(STEP_TIMER_NUM)
#define _PULSE_WAIT while (EXTRA_CYCLES_BABYSTEP > (uint32_t)(HAL_timer_get_count(STEP_TIMER_NUM) - pulse_start) * (PULSE_TIMER_PRESCALE)) { /* nada */ }
#else
#define _SAVE_START NOOP
@@ -2155,11 +2154,10 @@ void Stepper::report_positions() {
#define BABYSTEP_AXIS(AXIS, INVERT, DIR) { \
const uint8_t old_dir = _READ_DIR(AXIS); \
_ENABLE(AXIS); \
- _SAVE_START; \
_APPLY_DIR(AXIS, _INVERT_DIR(AXIS)^DIR^INVERT); \
- _PULSE_WAIT; \
- _APPLY_STEP(AXIS)(!_INVERT_STEP_PIN(AXIS), true); \
+ DELAY_NS(400); /* DRV8825 */ \
_SAVE_START; \
+ _APPLY_STEP(AXIS)(!_INVERT_STEP_PIN(AXIS), true); \
_PULSE_WAIT; \
_APPLY_STEP(AXIS)(_INVERT_STEP_PIN(AXIS), true); \
_APPLY_DIR(AXIS, old_dir); \
@@ -2229,6 +2227,8 @@ void Stepper::report_positions() {
Y_DIR_WRITE(INVERT_Y_DIR ^ z_direction);
Z_DIR_WRITE(INVERT_Z_DIR ^ z_direction);
+ DELAY_NS(400); // DRV8825
+
_SAVE_START;
X_STEP_WRITE(!INVERT_X_STEP_PIN);