Bluetooth SPP + Edison library patches

0000-nonblock.patch

diff -uprN a/bt_test_nonblock_read/bt_test_nonblock_read.ino b/bt_test_nonblock_read/bt_test_nonblock_read.ino
--- a/bt_test_nonblock_read/bt_test_nonblock_read.ino	1969-12-31 21:00:00.000000000 -0300
+++ b/bt_test_nonblock_read/bt_test_nonblock_read.ino	2015-12-14 11:32:58.394690200 -0200
@@ -0,0 +1,22 @@
+#include <Wire.h>
+#include <Intel_Edison_BT_SPP.h>
+
+static Intel_Edison_BT_SPP spp = Intel_Edison_BT_SPP();
+
+void setup() {
+	Serial.begin(115200);
+	Serial.println("Intel Edison BT SPP test!");
+	
+	spp.open();
+}
+
+void loop() {
+	ssize_t size = -1;
+	if (spp.wait() > 0 && spp.ready()) {
+		size = spp.read();
+	}
+	if (size != -1) {
+		Serial.println(spp.getBuf());
+	}
+}
+
diff -uprN a/Intel_Edison_BT_SPP.cpp b/Intel_Edison_BT_SPP.cpp
--- a/Intel_Edison_BT_SPP.cpp	2015-05-04 11:40:35.342959600 -0300
+++ b/Intel_Edison_BT_SPP.cpp	2015-12-14 11:32:27.232621000 -0200
@@ -4,6 +4,10 @@
 #include <unistd.h>
 #include <errno.h>
 #include <string.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/select.h>
+#include <errno.h>
 #include <Intel_Edison_BT_SPP.h>
 
 using namespace std;
@@ -25,6 +40,19 @@ int Intel_Edison_BT_SPP::open() {
 	return -1;
 }
 
+int Intel_Edison_BT_SPP::wait() {
+	struct timeval tv;
+	tv.tv_sec = 0;
+	tv.tv_usec = 500000;
+	FD_ZERO(&_readfd);
+	FD_SET(_fd, &_readfd);
+	return select(_fd + 1, &_readfd, NULL, NULL, &tv);
+}
+
+int Intel_Edison_BT_SPP::ready() {
+	return FD_ISSET(_fd, &_readfd);
+}
+
 ssize_t Intel_Edison_BT_SPP::read() {
 
 	if (_fd == -1)
diff -uprN a/Intel_Edison_BT_SPP.h b/Intel_Edison_BT_SPP.h
--- a/Intel_Edison_BT_SPP.h	2015-05-04 11:21:22.269419400 -0300
+++ b/Intel_Edison_BT_SPP.h	2015-12-14 10:29:37.340650900 -0200
@@ -13,11 +13,14 @@ class Intel_Edison_BT_SPP {
 	public:
 	int open();
 	int read();
+	int wait();
+	int ready();
 	const char * getBuf();
 	~Intel_Edison_BT_SPP();
 
 	private:
 	int _fd = -1;
+	fd_set _readfd;
 	const char * _pipeName = "/tmp/arduino_pipe_out";
 	char _buf[MAX_BUF];
 };

0001-wait-loop.patch

diff -uprN a/Intel_Edison_BT_SPP.cpp b/Intel_Edison_BT_SPP.cpp
--- a/Intel_Edison_BT_SPP.cpp	2015-12-14 12:01:35.970646200 -0200
+++ b/Intel_Edison_BT_SPP.cpp	2015-12-14 11:32:27.232621000 -0200
@@ -17,6 +17,17 @@ int Intel_Edison_BT_SPP::open() {
 	if (_fd != -1)
 		close(_fd);
 
+	struct stat st;
+	while(stat(_pipeName, &st) == -1) {
+		if(errno != ENOENT) {
+			perror("Cannot open file\n");
+			printf("errno %s\n", strerror(errno));
+			Serial.print("open error "); Serial.println(strerror(errno));
+			return 0;
+		}
+		usleep(200000);
+	}
+
 	_fd = ::open(_pipeName, O_RDONLY);
 
 	if (_fd == -1) {