restructuring

deprecated/F1/GPS+ultrasonic/ultrasonic.h

@@ -0,0 +1,53 @@
+/*
+ * ultrasonic.h
+ *
+ * Copyright 2015 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 __ULTRASONIC_H__
+#define __ULTRASONIC_H__
+
+#include <stdint.h>
+
+void tim2_init();
+int ultrasonic_get(uint32_t *L);
+void poll_ultrasonic();
+extern uint32_t last_us_val;
+
+// Sensor mode
+typedef enum{
+	 US_MODE_OFF         // sensor is off
+	,US_MODE_DONE        // measurement done, ready for next
+	,US_MODE_TRIG        // sensor triggered
+	,US_MODE_WAIT        // wait for pulse
+	,US_MODE_MEASUREMENT // measurement in process
+	,US_MODE_READY       // measurements done
+} usmode;
+
+// trigger time: after trigger event ends, timer will be configured for capture - 20us
+#define TRIG_T     (200)
+// trigger length - 10us
+#define TRIG_L     (10)
+// max length of measurement (to detect signal absence)
+#define MAX_MSRMNT_LEN  (65535)
+// max difference of measured len for pass detection
+#define MAX_LEN_DIFF   (300)
+// minimal length of signal in ms
+#define ULTRASONIC_TIMEOUT  (10)
+#endif // __ULTRASONIC_H__