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Diffstat (limited to 'binding/hvac-demo-binding.c')
-rw-r--r--binding/hvac-demo-binding.c56
1 files changed, 31 insertions, 25 deletions
diff --git a/binding/hvac-demo-binding.c b/binding/hvac-demo-binding.c
index 3eb1876..1b776cd 100644
--- a/binding/hvac-demo-binding.c
+++ b/binding/hvac-demo-binding.c
@@ -1,7 +1,9 @@
/*
* Copyright (C) 2015, 2016 "IoT.bzh"
+ * Copyright (C) 2016 Konsulko Group
* Author "Romain Forlot"
* Author "Jose Bolo"
+ * Author "Scott Murray <scott.murray@konsulko.com>"
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -18,6 +20,7 @@
#define _GNU_SOURCE
#include <string.h>
+#include <stdbool.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
@@ -31,9 +34,6 @@
#include <afb/afb-binding.h>
#include <afb/afb-service-itf.h>
-// Uncomment this line to pass into can simulation mode
-//#define SIMULATE_HVAC
-
#define CAN_DEV "vcan0"
static const struct afb_binding_interface *interface;
@@ -94,18 +94,15 @@ static struct {
struct can_handler {
int socket;
+ bool simulation;
+ char *send_msg;
struct sockaddr_can txAddress;
};
-static struct can_handler can_handler = { .socket = -1 };
+static struct can_handler can_handler = { .socket = -1, .simulation = false, .send_msg = "SENDING CAN FRAME"};
-static int open_can_dev()
+static int open_can_dev_helper()
{
-#if defined(SIMULATE_HVAC)
- DEBUG(interface, "Defining can handler socket to 0 and return");
- can_handler.socket = 0;
- return 0;
-#else
struct ifreq ifr;
DEBUG(interface, "CAN Handler socket : %d", can_handler.socket);
@@ -142,7 +139,20 @@ static int open_can_dev()
can_handler.socket = -1;
}
return -1;
-#endif
+}
+
+static int open_can_dev()
+{
+ int rc = retry(open_can_dev_helper);
+ if(rc < 0)
+ {
+ ERROR(interface, "Open of interface %s failed. Falling back to simulation mode", CAN_DEV);
+ can_handler.socket = 0;
+ can_handler.simulation = true;
+ can_handler.send_msg = "FAKE CAN FRAME";
+ rc = 0;
+ }
+ return rc;
}
// Get original get temperature function from cpp hvacplugin code
@@ -198,29 +208,25 @@ static int write_can()
txCanFrame.data[7] = 0;
DEBUG(interface, "%s: %d %d [%02x %02x %02x %02x %02x %02x %02x %02x]\n",
-#if defined(SIMULATE_HVAC)
- "FAKE CAN FRAME",
-#else
- "SENDING CAN FRAME",
-#endif
+ can_handler.send_msg,
txCanFrame.can_id, txCanFrame.can_dlc,
txCanFrame.data[0], txCanFrame.data[1], txCanFrame.data[2], txCanFrame.data[3],
txCanFrame.data[4], txCanFrame.data[5], txCanFrame.data[6], txCanFrame.data[7]);
-#if !defined(SIMULATE_HVAC)
- rc = sendto(can_handler.socket, &txCanFrame, sizeof(struct can_frame), 0,
- (struct sockaddr*)&can_handler.txAddress, sizeof(can_handler.txAddress));
- if (rc < 0)
+ if(!can_handler.simulation)
{
- ERROR(interface, "Sending can frame failed. Attempt to reopen can device socket.");
- retry(open_can_dev);
+ rc = sendto(can_handler.socket, &txCanFrame, sizeof(struct can_frame), 0,
+ (struct sockaddr*)&can_handler.txAddress, sizeof(can_handler.txAddress));
+ if (rc < 0)
+ {
+ ERROR(interface, "Sending CAN frame failed.");
+ }
}
-#endif
}
else
{
ERROR(interface, "socket not initialized. Attempt to reopen can device socket.");
- retry(open_can_dev);
+ open_can_dev();
}
return rc;
}
@@ -425,5 +431,5 @@ const struct afb_binding *afbBindingV1Register (const struct afb_binding_interfa
int afbBindingV1ServiceInit(struct afb_service service)
{
- return retry(open_can_dev);
+ return open_can_dev();
}