corexz: Add CoreXZ kinematics (#3129)

Add a CoreXZ kinematics

Signed-off-by: Maks Zolin <mzolin@vorondesign.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/klippy/chelper/kin_corexz.c b/klippy/chelper/kin_corexz.c
new file mode 100644
index 00000000..320dc239
--- /dev/null
+++ b/klippy/chelper/kin_corexz.c
@@ -0,0 +1,40 @@
+// CoreXZ kinematics stepper pulse time generation
+//
+// Copyright (C) 2020  Maks Zolin <mzolin@vorondesign.com>
+//
+// This file may be distributed under the terms of the GNU GPLv3 license.
+
+#include <stdlib.h> // malloc
+#include <string.h> // memset
+#include "compiler.h" // __visible
+#include "itersolve.h" // struct stepper_kinematics
+#include "trapq.h" // move_get_coord
+
+static double
+corexz_stepper_plus_calc_position(struct stepper_kinematics *sk, struct move *m
+                                  , double move_time)
+{
+    struct coord c = move_get_coord(m, move_time);
+    return c.x + c.z;
+}
+
+static double
+corexz_stepper_minus_calc_position(struct stepper_kinematics *sk, struct move *m
+                                   , double move_time)
+{
+    struct coord c = move_get_coord(m, move_time);
+    return c.x - c.z;
+}
+
+struct stepper_kinematics * __visible
+corexz_stepper_alloc(char type)
+{
+    struct stepper_kinematics *sk = malloc(sizeof(*sk));
+    memset(sk, 0, sizeof(*sk));
+    if (type == '+')
+        sk->calc_position_cb = corexz_stepper_plus_calc_position;
+    else if (type == '-')
+        sk->calc_position_cb = corexz_stepper_minus_calc_position;
+    sk->active_flags = AF_X | AF_Z;
+    return sk;
+}