binding iiodevices: handles 3 iiodevices

handle accel, magn et anglvel iiodevices
args key indicates the desired coordinates at subcription
frequency can be also specified at subscription

Example for subscription:
- iiodevices subscribe { "event": "accel", "uid": "1", "args": "xyz", "frequency": "0.1" }
- iiodevices subscribe { "event": "magn", "uid": "1", "args": "xz", "frequency": "0.1" }

Change-Id: I7f300f56b5d69506434f31fbb6e552c7afdf7489
Signed-off-by: Clément Bénier <clement.benier@iot.bzh>
Signed-off-by: clement benier <clement.benier@iot.bzh>

1 files changed, 51 insertions, 0 deletions

diff --git a/binding/config_iiodevices.c b/binding/config_iiodevices.c
new file mode 100644
index 0000000..d8f9d9e
--- /dev/null
+++ b/binding/config_iiodevices.c
@@ -0,0 +1,51 @@
+#include "config_iiodevices.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define AFB_BINDING_VERSION 2
+#include <afb/afb-binding.h>
+
+void set_channel_name(char *name, enum iio_elements iioelts)
+{
+    switch(iioelts) {
+        case X:
+            strcat(name, "_x"); break;
+        case Y:
+            strcat(name, "_y"); break;
+        case Z:
+            strcat(name, "_z"); break;
+        default:
+            AFB_WARNING("cannot set channel name, no matching iio_elements found: %d", iioelts);
+    }
+}
+
+enum iio_elements treat_iio_elts(const char *iioelts_string)
+{
+    enum iio_elements iioelts = 0;
+    if(!iioelts_string || !strcasecmp(iioelts_string, ""))
+        iioelts = X | Y | Z;
+    else {
+        if(strchr(iioelts_string, 'x') || strchr(iioelts_string, 'X'))
+            iioelts = iioelts | X;
+        if(strchr(iioelts_string, 'y') || strchr(iioelts_string, 'Y'))
+            iioelts = iioelts | Y;
+        if(strchr(iioelts_string, 'z') || strchr(iioelts_string, 'Z'))
+            iioelts = iioelts | Z;
+    }
+    AFB_INFO("ENUMERATION::: %s %d", iioelts_string, iioelts);
+    return iioelts;
+}
+
+int get_iio_nb(enum iio_elements iioelts)
+{
+    int nb_iioelts = 0;
+    int tmp_mask = 1;
+    while(tmp_mask <= iioelts) { //the number of channels is the number of elements
+        if((iioelts & tmp_mask) == tmp_mask)
+            nb_iioelts++;
+        tmp_mask = tmp_mask << 1;
+    }
+    return nb_iioelts;
+}