--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kstmApp/src/pi_2_mmio.h	Fri Aug 14 11:30:43 2015 +0200
@@ -0,0 +1,62 @@
+// Copyright (c) 2014 Adafruit Industries
+// Author: Tony DiCola
+// Based on code from Gert van Loo & Dom: http://elinux.org/RPi_Low-level_peripherals#GPIO_Code_examples
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+// Simple fast memory-mapped GPIO library for the Raspberry Pi.
+#ifndef PI_2_MMIO_H
+#define PI_2_MMIO_H
+
+#include <stdint.h>
+
+#define MMIO_SUCCESS 0
+#define MMIO_ERROR_DEVMEM -1
+#define MMIO_ERROR_MMAP -2
+#define MMIO_ERROR_OFFSET -3
+
+volatile uint32_t* pi_2_mmio_gpio;
+
+int pi_2_mmio_init(void);
+
+static inline void pi_2_mmio_set_input(const int gpio_number) {
+  // Set GPIO register to 000 for specified GPIO number.
+  *(pi_2_mmio_gpio+((gpio_number)/10)) &= ~(7<<(((gpio_number)%10)*3));
+}
+
+static inline void pi_2_mmio_set_output(const int gpio_number) {
+  // First set to 000 using input function.
+  pi_2_mmio_set_input(gpio_number);
+  // Next set bit 0 to 1 to set output.
+  *(pi_2_mmio_gpio+((gpio_number)/10)) |=  (1<<(((gpio_number)%10)*3));
+}
+
+static inline void pi_2_mmio_set_high(const int gpio_number) {
+  *(pi_2_mmio_gpio+7) = 1 << gpio_number;
+}
+
+static inline void pi_2_mmio_set_low(const int gpio_number) {
+  *(pi_2_mmio_gpio+10) = 1 << gpio_number;
+}
+
+static inline uint32_t pi_2_mmio_input(const int gpio_number) {
+  return *(pi_2_mmio_gpio+13) & (1 << gpio_number);
+}
+
+#endif