From 7cdd6cefe5e51e94684dfd4eb9b8b7896da110a8 Mon Sep 17 00:00:00 2001
From: dtb <git@trinity.moe>
Date: Tue, 1 Aug 2023 20:41:32 -0400
Subject: [PATCH] boilerplate

---
 tekubi/Makefile | 41 +++++++++++++++++++++++++++++
 tekubi/main.ino | 69 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 110 insertions(+)
 create mode 100644 tekubi/Makefile
 create mode 100644 tekubi/main.ino

diff --git a/tekubi/Makefile b/tekubi/Makefile
new file mode 100644
index 0000000..8e17bdd
--- /dev/null
+++ b/tekubi/Makefile
@@ -0,0 +1,41 @@
+i2cdevlib_url = https://github.com/jrowberg/i2cdevlib.git
+
+setup: I2Cdev.cpp I2Cdev.h MPU6050.cpp MPU6050.h
+
+clean_setup:
+	rm -rf i2cdevlib i2cdevlib_tmp
+	rm -f I2Cdev.cpp I2Cdev.h
+	rm -f MPU6050.cpp MPU6050.h
+
+i2cdevlib:
+	rm -rf i2cdevlib_tmp
+	git init i2cdevlib_tmp
+	git -C i2cdevlib_tmp remote add -f origin $(i2cdevlib_url)
+	git -C i2cdevlib_tmp config core.sparseCheckout true
+	git -C i2cdevlib_tmp sparse-checkout set
+	git -C i2cdevlib_tmp checkout master
+	mv i2cdevlib_tmp i2cdevlib
+
+i2cdevlib/Arduino/I2Cdev: i2cdevlib
+	git -C i2cdevlib sparse-checkout add Arduino/I2Cdev
+	git -C i2cdevlib sparse-checkout reapply
+	git fetch
+
+i2cdevlib/Arduino/MPU6050: i2cdevlib
+	git -C i2cdevlib sparse-checkout add Arduino/MPU6050
+	git -C i2cdevlib sparse-checkout reapply
+	git fetch
+
+I2Cdev.cpp: i2cdevlib/Arduino/I2Cdev
+	cp i2cdevlib/Arduino/I2Cdev/I2Cdev.cpp ./
+
+I2Cdev.h: i2cdevlib/Arduino/I2Cdev
+	cp i2cdevlib/Arduino/I2Cdev/I2Cdev.h ./
+
+MPU6050.cpp: i2cdevlib/Arduino/MPU6050
+	cp i2cdevlib/Arduino/MPU6050/MPU6050.cpp ./
+
+MPU6050.h: i2cdevlib/Arduino/MPU6050
+	cp i2cdevlib/Arduino/MPU6050/MPU6050.h ./
+
+.PHONY: setup clean_setup
diff --git a/tekubi/main.ino b/tekubi/main.ino
new file mode 100644
index 0000000..28b8726
--- /dev/null
+++ b/tekubi/main.ino
@@ -0,0 +1,69 @@
+#include <SPI.h>
+#include <Wire.h>
+
+/* https://github.com/jrowberg/i2cdevlib/ */
+#include "I2Cdev.h"
+#include "MPU6050.h"
+
+#define RAD_LOG_PERIOD 5000 /* milliseconds; sample rate */
+#define MINUTE 60000 /* milliseconds in a minute */
+
+/* USB power
+ *	5V -> Teensy Vin (100mA)
+ *	GND -> Teensy GND
+
+ *	5V -> Geiger 5V (100mA?)
+ *	GND -> Geiger GND
+
+ *	5V -> Gyro Vcc (10mA)
+ *	GND -> Gyro GND
+
+ *	5V -> ECG Vcc (4mA)
+ *	GND -> ECG GND */
+
+/* teensy 4.0
+ * https://www.pjrc.com/store/teensy40.html */
+
+/* geiger counter
+ * https://www.rhelectronics.store
+ *	/radiation-detector-geiger-counter-diy-kit-second-edition
+ * INT -> Teensy D3 */
+
+/* gyro
+ * https://www.elecrow.com/crowtail-mpu6050-accelerometer-gyro.html
+ * SDA -> Teensy SDA0
+ * SCL -> Teensy SCL0 */
+
+/* ecg
+ * https://www.elecrow.com/crowtail-pulse-sensor-p-1673.html
+ * SDA -> Teensy SDA0
+ * SCL -> Teensy SCL0 */
+
+
+unsigned long rad_count = 0;
+unsigned long rad_cpm;
+/* https://www.pjrc.com/teensy/td_timing_elaspedMillis.html */
+elapsedMillis rad_period = 0;
+
+void rad_interrupt(){
+	++rad_count;
+}
+
+void setup(){
+
+	/* geiger counter */{
+		pinMode(3, INPUT);
+		digitalWrite(3, HIGH);
+		attachInterrupt(0, rad_interrupt, FALLING);
+	}
+}
+
+void loop(){
+
+	/* geiger counter */{
+		if(rad_period > RAD_LOG_PERIOD){
+			rad_cpm = rad_count * (MINUTE / RAD_LOG_PERIOD);
+			rad_period = 0;
+		}
+	}
+}