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Diffstat (limited to 'binding/hvac-demo-binding.c')
-rw-r--r-- | binding/hvac-demo-binding.c | 798 |
1 files changed, 798 insertions, 0 deletions
diff --git a/binding/hvac-demo-binding.c b/binding/hvac-demo-binding.c new file mode 100644 index 0000000..ec09472 --- /dev/null +++ b/binding/hvac-demo-binding.c @@ -0,0 +1,798 @@ +/* + * 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, + .auth = NULL, + .info = "Get the left zone temperature", + .session = AFB_SESSION_NONE_V2 + }, + { + .verb = "get_temp_right_zone", + .callback = get_temp_right_zone, + .auth = NULL, + .info = "Get the right zone temperature", + .session = AFB_SESSION_NONE_V2 + }, + { + .verb = "get_fanspeed", + .callback = get_fanspeed, + .auth = NULL, + .info = "Read fan speed", + .session = AFB_SESSION_NONE_V2 + }, + { + .verb = "get", + .callback = get, + .auth = NULL, + .info = "Read all speed", + .session = AFB_SESSION_NONE_V2 + }, + { + .verb = "set", + .callback = set, + .auth = NULL, + .info = "Set a HVAC component value", + .session = AFB_SESSION_NONE_V2 + }, + { + .verb = "temp_left_zone_led", + .callback = temp_left_zone_led, + .auth = NULL, + .info = "Turn on LED on left temperature zone", + .session = AFB_SESSION_NONE_V2 + }, + { + .verb = "temp_right_zone_led", + .callback = temp_right_zone_led, + .auth = NULL, + .info = "Turn on LED on left temperature zone", + .session = AFB_SESSION_NONE_V2 + + }, + { + .verb = NULL, + .callback = NULL, + .auth = NULL, + .info = NULL, + .session = 0 + } +}; + +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 +}; |