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|
/*
* 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.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define _GNU_SOURCE
#include <stdio.h>
#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 AFB_BINDING_VERSION 2
#include <afb/afb-binding.h>
#define RED "/sys/class/leds/blinkm-3-9-red/brightness"
#define GREEN "/sys/class/leds/blinkm-3-9-green/brightness"
#define BLUE "/sys/class/leds/blinkm-3-9-blue/brightness"
#define CAN_DEV "vcan0"
#ifndef NULL
#define NULL 0
#endif
static const struct afb_binding_interface *interface;
static struct afb_event event;
/*****************************************************************************************/
/*****************************************************************************************/
/** **/
/** **/
/** 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;
uint8_t value;
} hvac_values[] = {
{ "LeftTemperature", 21 },
{ "RightTemperature", 21 },
{ "Temperature", 21 },
{ "FanSpeed", 0 },
{ "ACEnabled", 0 },
{ "LeftLed", 15 },
{ "RightLed", 15 }
};
// Holds RGB combinations for each temperature
static struct {
const int temperature;
const int rgb[3];
} degree_colours[] = {
{15, {0, 0, 229} },
{16, {22, 0, 204} },
{17, {34, 0, 189} },
{18, {46, 0, 175} },
{19, {58, 0, 186} },
{20, {70, 0, 146} },
{21, {82, 0, 131} },
{22, {104, 0, 116} },
{23, {116, 0, 102} },
{24, {128, 0, 87} },
{25, {140, 0, 73} },
{26, {152, 0, 58} },
{27, {164, 0, 43} },
{28, {176, 0, 29} },
{29, {188, 0, 14} },
{30, {201, 0, 5} }
};
struct can_handler {
int socket;
bool simulation;
char *send_msg;
struct sockaddr_can txAddress;
};
struct led_paths {
char *red;
char *green;
char *blue;
}led_paths_values = {
.red = RED,
.green = GREEN,
.blue = BLUE
};
static struct can_handler can_handler = { .socket = -1, .simulation = false, .send_msg = "SENDING CAN FRAME"};
static int open_can_dev_helper()
{
struct ifreq ifr;
AFB_DEBUG("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)
{
AFB_ERROR("socket could not be created");
}
else
{
// Attempts to open a socket to CAN bus
strcpy(ifr.ifr_name, CAN_DEV);
if(ioctl(can_handler.socket, SIOCGIFINDEX, &ifr) < 0)
{
AFB_ERROR("ioctl failed");
}
else
{
can_handler.txAddress.can_family = AF_CAN;
can_handler.txAddress.can_ifindex = ifr.ifr_ifindex;
// And bind it to txAddress
if (bind(can_handler.socket, (struct sockaddr *)&can_handler.txAddress, sizeof(can_handler.txAddress)) < 0)
{
AFB_ERROR("bind failed");
}
else {
return 0;
}
}
close(can_handler.socket);
can_handler.socket = -1;
}
return -1;
}
static int open_can_dev()
{
int rc = retry(open_can_dev_helper);
if(rc < 0)
{
AFB_ERROR("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 - 15) + 0x10;
if (result < 0x10)
result = 0x10;
if (result > 0xF0)
result = 0xF0;
return (uint8_t)result;
}
static uint8_t read_temp_left_zone()
{
return hvac_values[0].value;
}
static uint8_t read_temp_right_zone()
{
return hvac_values[1].value;
}
static uint8_t read_temp_left_led()
{
return hvac_values[5].value;
}
static uint8_t read_temp_right_led()
{
return hvac_values[6].value;
}
static uint8_t read_temp()
{
return (uint8_t)(((int)read_temp_left_zone() + (int)read_temp_right_zone()) >> 1);
}
static uint8_t read_fanspeed()
{
return hvac_values[3].value;
}
/*
* @param: None
*
* @brief: Parse JSON configuration file for blinkm path
*/
static int parse_config()
{
struct json_object *ledtemp = NULL;
struct json_object *jobj = json_object_from_file("/etc/hvac.json");
// Check if .json file has been parsed as a json_object
if (!jobj) {
AFB_ERROR("JSON file could not be opened!\n");
return 1;
}
// Check if json_object with key "ledtemp" has been found in .json file
if (!json_object_object_get_ex(jobj, "ledtemp", &ledtemp)){
AFB_ERROR("Key not found!\n");
return 1;
}
// Extract directory paths for each LED colour
json_object_object_foreach(ledtemp, key, value) {
if (strcmp(key, "red") == 0) {
led_paths_values.red = json_object_get_string(value);
} else if (strcmp(key, "green") == 0) {
led_paths_values.green = json_object_get_string(value);
} else if (strcmp(key, "blue") == 0) {
led_paths_values.blue = json_object_get_string(value);
}
}
// return 0 if all succeeded
return 0;
}
/*
* @brief Writing to LED for both temperature sliders
*/
static int temp_write_led()
{
int rc = -1, red_value, green_value, blue_value;
int right_temp;
int left_temp;
left_temp = read_temp_left_led() - 15;
right_temp = read_temp_right_led() - 15;
// Calculates average colour value taken from the temperature toggles
red_value = (degree_colours[left_temp].rgb[0] + degree_colours[right_temp].rgb[0]) / 2;
green_value = (degree_colours[left_temp].rgb[1] + degree_colours[right_temp].rgb[1]) / 2;
blue_value = (degree_colours[left_temp].rgb[2] + degree_colours[right_temp].rgb[2]) / 2;
// default path: /sys/class/leds/blinkm-3-9-red/brightness
FILE* r = fopen(led_paths_values.red, "w");
if(r){
fprintf(r, "%d", red_value);
fclose(r);
} else {
AFB_ERROR("Unable to open red LED path!\n");
return -1;
}
// default path: /sys/class/leds/blinkm-3-9-green/brightness
FILE* g = fopen(led_paths_values.green, "w");
if(g){
fprintf(g, "%d", green_value);
fclose(g);
} else {
AFB_ERROR("Unable to open green LED path!\n");
return -1;
}
// default path: /sys/class/leds/blinkm-3-9-blue/brightness
FILE* b = fopen(led_paths_values.blue, "w");
if(b){
fprintf(b, "%d", blue_value);
fclose(b);
} else {
AFB_ERROR("Unable to open blue LED path!\n");
return -1;
}
return 0;
}
/*
* @brief Get temperature of left toggle in HVAC system
*
* @param struct afb_req : an afb request structure
*
*/
static void temp_left_zone_led(struct afb_req request)
{
int i = 5, 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];
AFB_WARNING("In temp_left_zone_led.");
query = afb_req_json(request);
/* records initial values */
AFB_WARNING("Records initial values");
values[i] = saves[i] = hvac_values[i].value;
if (json_object_object_get_ex(query, hvac_values[i].name, &val))
{
AFB_WARNING("Value of values[i] = %d", values[i]);
AFB_WARNING("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);
AFB_WARNING("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);
AFB_WARNING("We get a double: %f => %d",d,x);
}
else {
afb_req_fail_f(request, "bad-request",
"argument '%s' isn't integer or double", hvac_values[i].name);
return;
}
if (x < 0 || x > 255)
{
afb_req_fail_f(request, "bad-request",
"argument '%s' is out of bounds", hvac_values[i].name);
return;
}
if (values[i] != x) {
values[i] = (uint8_t)x;
changed = 1;
AFB_WARNING("%s changed to %d", hvac_values[i].name,x);
}
}
else {
AFB_WARNING("%s not found in query!",hvac_values[i].name);
}
if (changed) {
hvac_values[i].value = values[i]; // update structure at line 102
AFB_WARNING("WRITE_LED: value: %d", hvac_values[i].value);
rc = temp_write_led();
if (rc >= 0)
afb_req_success(request, NULL, NULL);
else if (retry(temp_write_led)) {
/* restore initial values */
hvac_values[i].value = saves[i];
afb_req_fail(request, "error", "I2C error");
}
}
}
/*
* @brief Get temperature of right toggle in HVAC system
*
* @param struct afb_req : an afb request structure
*
*/
static void temp_right_zone_led(struct afb_req request)
{
int i = 6, 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];
AFB_WARNING("In temp_right_zone_led.");
query = afb_req_json(request);
/* records initial values */
AFB_WARNING("Records initial values");
values[i] = saves[i] = hvac_values[i].value;
if (json_object_object_get_ex(query, hvac_values[i].name, &val))
{
AFB_WARNING("Value of values[i] = %d", values[i]);
AFB_WARNING("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);
AFB_WARNING("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);
AFB_WARNING("We get a double: %f => %d",d,x);
}
else {
afb_req_fail_f(request, "bad-request",
"argument '%s' isn't integer or double", hvac_values[i].name);
return;
}
if (x < 0 || x > 255)
{
afb_req_fail_f(request, "bad-request",
"argument '%s' is out of bounds", hvac_values[i].name);
return;
}
if (values[i] != x) {
values[i] = (uint8_t)x;
changed = 1;
AFB_WARNING("%s changed to %d", hvac_values[i].name,x);
}
}
else {
AFB_WARNING("%s not found in query!", hvac_values[i].name);
}
if (changed) {
hvac_values[i].value = values[i]; // update structure at line 102
AFB_WARNING("WRITE_LED: value: %d", hvac_values[i].value);
rc = temp_write_led();
if (rc >= 0)
afb_req_success(request, NULL, NULL);
else if (retry(temp_write_led)) {
/* restore initial values */
hvac_values[i].value = saves[i];
afb_req_fail(request, "error", "I2C error");
}
}
}
static int write_can()
{
struct can_frame txCanFrame;
int rc = 0;
rc = can_handler.socket;
if (rc >= 0)
{
// Hardcoded can_id and dlc (data lenght code)
txCanFrame.can_id = 0x30;
txCanFrame.can_dlc = 8;
txCanFrame.data[0] = to_can_temp(read_temp_left_zone());
txCanFrame.data[1] = to_can_temp(read_temp_right_zone());
txCanFrame.data[2] = to_can_temp(read_temp());
txCanFrame.data[3] = 0xf0;
txCanFrame.data[4] = read_fanspeed();
txCanFrame.data[5] = 1;
txCanFrame.data[6] = 0;
txCanFrame.data[7] = 0;
AFB_DEBUG("%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]);
if(!can_handler.simulation)
{
rc = (int)sendto(can_handler.socket, &txCanFrame, sizeof(struct can_frame), 0,
(struct sockaddr*)&can_handler.txAddress, sizeof(can_handler.txAddress));
if (rc < 0)
{
AFB_ERROR("Sending CAN frame failed.");
}
}
}
else
{
AFB_ERROR("socket not initialized. Attempt to reopen can device socket.");
open_can_dev();
}
return rc;
}
/*****************************************************************************************/
/*****************************************************************************************/
/** **/
/** **/
/** SECTION: BINDING VERBS IMPLEMENTATION **/
/** **/
/** **/
/*****************************************************************************************/
/*****************************************************************************************/
/*
* @brief Get fan speed HVAC system
*
* @param struct afb_req : an afb request structure
*
*/
static void get_fanspeed(struct afb_req request)
{
json_object *ret_json;
uint8_t fanspeed = read_fanspeed();
ret_json = json_object_new_object();
json_object_object_add(ret_json, "FanSpeed", json_object_new_int(fanspeed));
afb_req_success(request, ret_json, NULL);
}
/*
* @brief Read Consign right zone temperature for HVAC system
*
* @param struct afb_req : an afb request structure
*
*/
static void get_temp_right_zone(struct afb_req request)
{
json_object *ret_json;
uint8_t temp = read_temp_right_zone();
ret_json = json_object_new_object();
json_object_object_add(ret_json, "RightTemperature", json_object_new_int(temp));
afb_req_success(request, ret_json, NULL);
}
/*
* @brief Read Consign left zone temperature for HVAC system
*
* @param struct afb_req : an afb request structure
*
*/
static void get_temp_left_zone(struct afb_req request)
{
json_object *ret_json;
uint8_t temp = read_temp_left_zone();
ret_json = json_object_new_object();
json_object_object_add(ret_json, "LeftTemperature", json_object_new_int(temp));
afb_req_success(request, ret_json, NULL);
}
/*
* @brief Read all values
*
* @param struct afb_req : an afb request structure
*
*/
static void get(struct afb_req request)
{
AFB_DEBUG("Getting all values");
json_object *ret_json;
ret_json = json_object_new_object();
json_object_object_add(ret_json, "LeftTemperature", json_object_new_int(read_temp_left_zone()));
json_object_object_add(ret_json, "RightTemperature", json_object_new_int(read_temp_right_zone()));
json_object_object_add(ret_json, "FanSpeed", json_object_new_int(read_fanspeed()));
afb_req_success(request, ret_json, NULL);
}
/*
* @brief Set a component value using a json object retrieved from request
*
* @param struct afb_req : an afb request structure
*
*/
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];
/* records initial values */
AFB_DEBUG("Records initial values");
i = (int)(sizeof hvac_values / sizeof *hvac_values);
while (i) {
i--;
values[i] = saves[i] = hvac_values[i].value;
}
/* Loop getting arguments */
query = afb_req_json(request);
changed = 0;
i = (int)(sizeof hvac_values / sizeof *hvac_values);
AFB_DEBUG("Looping for args. i: %d", i);
while (i)
{
i--;
AFB_DEBUG("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))
{
AFB_DEBUG("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);
AFB_DEBUG("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);
AFB_DEBUG("We get a double: %f => %d",d,x);
}
else {
afb_req_fail_f(request, "bad-request",
"argument '%s' isn't integer or double", hvac_values[i].name);
return;
}
if (x < 0 || x > 255)
{
afb_req_fail_f(request, "bad-request",
"argument '%s' is out of bounds", hvac_values[i].name);
return;
}
if (values[i] != x) {
values[i] = (uint8_t)x;
changed = 1;
AFB_DEBUG("%s changed to %d",hvac_values[i].name,x);
}
}
else {
AFB_DEBUG("%s not found in query!",hvac_values[i].name);
}
}
/* attemps to set new values */
AFB_DEBUG("Diff: %d", changed);
if (changed)
{
i = (int)(sizeof hvac_values / sizeof *hvac_values);
while (i) {
i--;
hvac_values[i].value = values[i];
}
rc = write_can();
if (rc >= 0)
afb_req_success(request, NULL, NULL);
else if (retry(write_can)) {
/* restore initial values */
i = (int)(sizeof hvac_values / sizeof *hvac_values);
while (i) {
i--;
hvac_values[i].value = saves[i];
}
afb_req_fail(request, "error", "CAN error");
}
}
else {
afb_req_success(request, NULL, "No changes");
}
}
int bindingServicePreInit(struct afb_service service)
{
return open_can_dev();
}
int bindingServiceInit(struct afb_service service)
{
event = afb_daemon_make_event("language");
if(parse_config() != 0)
AFB_WARNING("Default values are being used!\n");
if(afb_daemon_require_api("identity", 1))
return -1;
return afb_service_call_sync("identity", "subscribe", NULL, NULL);
}
void onEvent(const char *event_name, struct json_object *object)
{
json_object *args, *language = json_object_new_object();
json_object *id_evt_name, *current_identity;
AFB_NOTICE("Event '%s' received: %s", event_name,
json_object_to_json_string_ext(object, JSON_C_TO_STRING_PRETTY));
if (json_object_object_get_ex(object, "eventName", &id_evt_name) &&
!strcmp(json_object_get_string(id_evt_name), "login") &&
!afb_service_call_sync("identity", "get", NULL, ¤t_identity)) {
json_object *response;
if (! json_object_object_get_ex(current_identity, "response", &response) || ! json_object_object_get_ex(response, "graphPreferredLanguage", &language)) {
language = json_object_new_string("en_US");
}
afb_event_broadcast(event, language);
}
}
// TODO: Have to change session management flag to AFB_SESSION_CHECK to use token auth
static const struct afb_verb_v2 _afb_verbs_v2_hvac[]= {
{
.verb = "get_temp_left_zone",
.callback = get_temp_left_zone,
.info = "Get the left zone temperature",
.session = AFB_SESSION_NONE,
},
{
.verb = "get_temp_right_zone",
.callback = get_temp_right_zone,
.info = "Get the right zone temperature",
.session = AFB_SESSION_NONE,
},
{
.verb = "get_fanspeed",
.callback = get_fanspeed,
.info = "Read fan speed",
.session = AFB_SESSION_NONE,
},
{
.verb = "get",
.callback = get,
.info = "Read all speed",
.session = AFB_SESSION_NONE,
},
{
.verb = "set",
.callback = set,
.info = "Set a HVAC component value",
.session = AFB_SESSION_NONE,
},
{
.verb = "temp_left_zone_led",
.callback = temp_left_zone_led,
.info = "Turn on LED on left temperature zone",
.session = AFB_SESSION_NONE,
},
{
.verb = "temp_right_zone_led",
.callback = temp_right_zone_led,
.info = "Turn on LED on left temperature zone",
.session = AFB_SESSION_NONE,
},
{ }
};
const struct afb_binding_v2 afbBindingV2 = {
.api = "hvac",
.specification = NULL,
.info = "HVAC service",
.verbs = _afb_verbs_v2_hvac,
.preinit = bindingServicePreInit,
.init = bindingServiceInit,
.onevent = onEvent,
.noconcurrency = 0
};
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