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authorYordan Dimitrov <y.dimitrov.14@gmail.com>2018-07-07 11:07:58 +0300
committerYordan Dimitrov <y.dimitrov.14@gmail.com>2018-07-10 14:37:27 +0300
commit1aa5a65601669dc33c1ce8729ca607d847985a44 (patch)
treee06de02170cc6769d2d1f7f33501e255581d0b98 /binding/hvac-demo-binding.c
parentf18741520f54365141d997fe7a7a40d0b8f9bc5e (diff)
Setting up a JSON configuration file to change LED paths without recompilingflounder_5.99.2flounder/5.99.25.99.2
v1 - the change allows the paths to the LED folders to be changed without having to recompile the widget - the JSON file itself is included in this commit with the name "hvac.json" - the location which the parser expects the configuration file to be in is /etc v2 - optimised code in terms of opening and closing paths for writing - put afb header definitions together v3 - removed all caps warning notifications Change-Id: If075c6650d8802849cbd706be4adbca9f1996c9e Signed-off-by: Yordan Dimitrov <y.dimitrov.14@gmail.com>
Diffstat (limited to 'binding/hvac-demo-binding.c')
-rw-r--r--binding/hvac-demo-binding.c118
1 files changed, 82 insertions, 36 deletions
diff --git a/binding/hvac-demo-binding.c b/binding/hvac-demo-binding.c
index b4f922a..a8993a1 100644
--- a/binding/hvac-demo-binding.c
+++ b/binding/hvac-demo-binding.c
@@ -29,14 +29,14 @@
#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 BLUE "/sys/class/leds/blinkm-3-9-blue/brightness"
#define GREEN "/sys/class/leds/blinkm-3-9-green/brightness"
-#include <afb/afb-binding.h>
+#define BLUE "/sys/class/leds/blinkm-3-9-blue/brightness"
#define CAN_DEV "vcan0"
@@ -134,6 +134,16 @@ struct can_handler {
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()
@@ -233,40 +243,52 @@ static uint8_t read_fanspeed()
}
/*
- * @brief Writing to LED for both temperature sliders
+ * @param: None
+ *
+ * @brief: Parse JSON configuration file for blinkm path
*/
-
-static int temp_write_led()
+static int parse_config()
{
- int rc = 0, red_flag, blue_flag, green_flag, red_value, green_value, blue_value;
- int right_temp;
- int left_temp;
+ struct json_object *ledtemp = NULL;
+ struct json_object *jobj = json_object_from_file("/etc/hvac.json");
- // /sys/class/leds/blinkm-3-9-red/brightness
- FILE* r = fopen(RED, "w");
- if (r == NULL) {
- AFB_ERROR("Unable to open RED path for writing");
- red_flag = 1;
+ // Check if .json file has been parsed as a json_object
+ if (!jobj) {
+ AFB_ERROR("JSON file could not be opened!\n");
+ return 1;
}
- // /sys/class/leds/blinkm-3-9-green/brightness
- FILE* g = fopen(GREEN, "w");
- if (g == NULL) {
- AFB_ERROR("Unable to open GREEN path for writing");
- green_flag = 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;
}
- // /sys/class/leds/blinkm-3-9-blue/brightness
- FILE* b = fopen(BLUE, "w");
- if (b == NULL) {
- AFB_ERROR("Unable to open BLUE path for writing");
- blue_flag = 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);
+ }
}
- if (red_flag || green_flag || blue_flag)
- {
- rc = 1;
- }
+ // 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;
@@ -275,16 +297,38 @@ static int temp_write_led()
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;
+ }
- // Writes to LED file the specific colour
- fprintf(r, "%d", red_value);
- fprintf(g, "%d", green_value);
- fprintf(b, "%d", blue_value);
- fclose(r);
- fclose(g);
- fclose(b);
- return rc;
+ // 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;
}
/*
@@ -655,6 +699,8 @@ int bindingServicePreInit(struct afb_service service)
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);