/*
* 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.
#define _GNU_SOURCE
#include <string.h>
+#include <stdbool.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <linux/can.h>
+#include <math.h>
#include <json-c/json.h>
#define CAN_DEV "vcan0"
-#define SIMULATE_HVAC
-
static const struct afb_binding_interface *interface;
+/*****************************************************************************************/
+/*****************************************************************************************/
+/** **/
+/** **/
+/** SECTION: UTILITY FUNCTIONS **/
+/** **/
+/** **/
+/*****************************************************************************************/
+/*****************************************************************************************/
+
+/*
+ * @brief Retry a function 3 times
+ *
+ * @param int function(): function that return an int wihtout any parameter
+ *
+ * @ return : 0 if ok, -1 if failed
+ *
+ */
+static int retry( int(*func)())
+{
+ int i;
+
+ for (i=0;i<4;i++)
+ {
+ if ( (*func)() >= 0)
+ {
+ return 0;
+ }
+ usleep(100000);
+ }
+ return -1;
+}
+
+/*****************************************************************************************/
+/*****************************************************************************************/
+/** **/
+/** **/
+/** SECTION: HANDLE CAN DEVICE **/
+/** **/
+/** **/
+/*****************************************************************************************/
+/*****************************************************************************************/
+
// Initialize CAN hvac array that will be sent trough the socket
static struct {
const char *name;
struct can_handler {
int socket;
+ bool simulation;
+ char *send_msg;
struct sockaddr_can txAddress;
};
-static struct can_handler can_handler = { .socket = -1 };
-
-/*****************************************************************************************/
-/*****************************************************************************************/
-/** **/
-/** **/
-/** SECTION: HANDLE CAN DEVICE **/
-/** **/
-/** **/
-/*****************************************************************************************/
-/*****************************************************************************************/
+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);
+ close(can_handler.socket);
+
can_handler.socket = socket(PF_CAN, SOCK_RAW, CAN_RAW);
if (can_handler.socket < 0)
{
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
static uint8_t to_can_temp(uint8_t value)
{
- int result = ((0xF0 - 0x10) / 15) * value - 16;
+ int result = ((0xF0 - 0x10) / 15) * (value - 15) + 0x10;
if (result < 0x10)
result = 0x10;
if (result > 0xF0)
txCanFrame.data[6] = 0;
txCanFrame.data[7] = 0;
-#if defined(SIMULATE_HVAC)
- DEBUG(interface, "WRITING CAN: %d %d [%02x %02x %02x %02x %02x %02x %02x %02x]\n",
+ DEBUG(interface, "%s: %d %d [%02x %02x %02x %02x %02x %02x %02x %02x]\n",
+ 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]);
-#else
- 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");
+ 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");
+ ERROR(interface, "socket not initialized. Attempt to reopen can device socket.");
+ open_can_dev();
}
return rc;
}
static void set(struct afb_req request)
{
int i, rc, x, changed;
+ double d;
struct json_object *query, *val;
uint8_t values[sizeof hvac_values / sizeof *hvac_values];
uint8_t saves[sizeof hvac_values / sizeof *hvac_values];
DEBUG(interface, "Searching... query: %s, i: %d, comp: %s", json_object_to_json_string(query), i, hvac_values[i].name);
if (json_object_object_get_ex(query, hvac_values[i].name, &val))
{
- DEBUG(interface, "We got it. Tests if it is an int or not.");
- if (!json_object_is_type(val, json_type_int))
- {
+ DEBUG(interface, "We got it. Tests if it is an int or double.");
+ if (json_object_is_type(val, json_type_int)) {
+ x = json_object_get_int(val);
+ DEBUG(interface, "We get an int: %d",x);
+ }
+ else if (json_object_is_type(val, json_type_double)) {
+ d = json_object_get_double(val);
+ x = (int)round(d);
+ DEBUG(interface, "We get a double: %f => %d",d,x);
+ }
+ else {
afb_req_fail_f(request, "bad-request",
- "argument '%s' isn't integer", hvac_values[i].name);
+ "argument '%s' isn't integer or double", hvac_values[i].name);
return;
}
- DEBUG(interface, "We get an 'int'. Hail for the int: %d", x);
- x = json_object_get_int(val);
if (x < 0 || x > 255)
{
afb_req_fail_f(request, "bad-request",
if (values[i] != x) {
values[i] = (uint8_t)x;
changed = 1;
+ DEBUG(interface,"%s changed to %d",hvac_values[i].name,x);
}
}
- DEBUG(interface, "Not found !");
+ else {
+ DEBUG(interface, "%s not found in query!",hvac_values[i].name);
+ }
}
/* attemps to set new values */
rc = write_can();
if (rc >= 0)
afb_req_success(request, NULL, NULL);
- else {
+ else if (retry(write_can)) {
/* restore initial values */
i = (int)(sizeof hvac_values / sizeof *hvac_values);
while (i) {
Code Review / apps / hvac.git / blobdiff