MAA version 0.2.0 moves to a standard C API

* Removed all C++ code and renamed all .cxx extensions to .c
* All functions are renamed to maa_ and modules are for example called maa_pwm
* Cmake can now 'make doc' using a Doxyfile.in to create documentation
* examples/ have been updated but swig generated API is untested

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

src/i2c/i2c.c

@@ -0,0 +1,105 @@
+/*
+ * Author: Brendan Le Foll
+ * Copyright (c) 2014 Intel Corporation.
+ *
+ * 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.
+ */
+
+#include "i2c.h"
+#include "smbus.h"
+
+int
+maa_i2c_init(i2c_t* dev)
+{
+    // maa allocates the memory for *dev
+    dev = malloc(sizeof *dev);
+    // Galileo only has one I2C master which should be /dev/i2c-0
+    // reliability is a fickle friend!
+    if ((dev->fh = open("/dev/i2c-0", O_RDWR)) < 1) {
+        fprintf(stderr, "Failed to open requested i2c port");
+    }
+}
+
+void
+maa_i2c_frequency(i2c_t* dev, int hz)
+{
+    dev->hz = hz;
+}
+
+int
+maa_i2c_receive(i2c_t* dev)
+{
+    return -1;
+}
+
+int
+maa_i2c_read(i2c_t* dev, char *data, int length)
+{
+    // this is the read(3) syscall not maa_i2c_read()
+    if (read(dev->fh, data, length) == length) {
+        return length;
+    }
+    return -1;
+}
+
+int
+maa_i2c_read_byte(i2c_t* dev)
+{
+    int byte;
+    if (byte = i2c_smbus_read_byte(dev->fh) < 0) {
+        return -1;
+    }
+    return byte;
+}
+
+int
+maa_i2c_write(i2c_t* dev, const char* data, int length)
+{
+    if (i2c_smbus_write_i2c_block_data(dev->fh, data[0], length-1, (uint8_t*) data+1) < 0) {
+        fprintf(stderr, "Failed to write to I2CSlave slave\n");
+	return -1;
+    }
+    return 0;
+}
+
+int
+maa_i2c_write_byte(i2c_t* dev, int data)
+{
+    if (i2c_smbus_write_byte(dev->fh, data) < 0) {
+        fprintf(stderr, "Failed to write to I2CSlave slave\n");
+	return -1;
+    }
+    return 0;
+}
+
+void
+maa_i2c_address(i2c_t* dev, int addr)
+{
+    dev->addr = addr;
+    if (ioctl(dev->fh, I2C_SLAVE_FORCE, addr) < 0) {
+        fprintf(stderr, "Failed to set slave address %d\n", addr);
+    }
+}
+
+void
+maa_i2c_stop(i2c_t* dev)
+{
+    free(dev);
+}