add code for raspberry-pi based p1 derotator

p1rotator/config.h

@@ -0,0 +1,74 @@
+/*
+ *                                                                                                  geany_encoding=koi8-r
+ * config.h
+ *
+ * Copyright 2018 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ *
+ */
+#pragma once
+#ifndef __CONFIG_H__
+#define __CONFIG_H__
+
+// amount of microsteps for each step
+#define USTEPS          (8.)
+// gear ratio
+#define GEARRAT         (8.)
+// steps per one revolution
+#define ONETURN_STEPS   (200.)
+
+/*
+ * Pins definition (used BROADCOM GPIO pins numbering)
+ */
+
+// End-switch - GPIO25 (leg22)
+#define ESW_PIN         (25)
+// Stepper: EN - GPIO18 (leg12), DIR - GPIO23 (leg16), STEP - GPIO24 (leg18)
+#define DIR_PIN         (23)
+#define STEP_PIN        (24)
+#define EN_PIN          (18)
+
+// active/passive levels (depending on stepper driver connection schematic)
+#define PIN_ACTIVE      (1)
+#define PIN_PASSIVE     (0)
+
+// active level on end-switch: 0 - normally opened, 1 - normally closed
+#define ESW_ACTIVE      (0)
+
+// positive & negative directions (signal @ DIR pin)
+#define DIR_POSITIVE    (1)
+#define DIR_NEGATIVE    (0)
+
+// maximum 200 steps per second
+#define MAX_SPEED   (200)
+#define USTEP_DELAY (1./MAX_SPEED/USTEPS)
+
+// Position angle calculation (val_Alp, val_Del, S_time - for real work)
+#define CALC_PA()       calc_PA(SrcAlpha, SrcDelta, S_time)
+
+// PA value for zero end-switch (add this value to desired PA)
+#define PA_ZEROVAL      (0.)
+
+
+// microsteps per one revolution
+#define ONETURN_USTEPS  (ONETURN_STEPS * USTEPS * GEARRAT)
+// initial (wrong) value of microsteps counter
+#define USTEPSBAD       (2*ONETURN_USTEPS)
+// minimal PA delta
+#define PA_MINSTEP      (360. / ONETURN_USTEPS)
+
+#endif // __CONFIG_H__