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#include "cethcan.h"
struct value {
uint8_t val;
time_t change, valid;
};
struct light {
struct light *next;
struct can_user *u;
char *name;
bool aggregate;
unsigned logical_addr;
size_t slave_count;
struct light **slaves;
struct value set, actual;
struct event *holdoff;
bool holdoff_pending;
bool holdoff_changed;
unsigned holdoff_value;
};
static struct light *lights = NULL, **plights = &lights;
struct light *light_find(const char *name)
{
struct light *l;
for (l = lights; l; l = l->next)
if (!strcmp(l->name, name))
break;
return l;
}
static void light_holdoff_event(int sock, short event, void *arg)
{
struct light *l = arg;
l->holdoff_pending = false;
if (!l->holdoff_changed)
return;
struct can_message msg;
msg.daddr = CANA_LIGHT_F(0, l->logical_addr);
msg.dlc = 1;
msg.bytes[0] = l->holdoff_value;
can_broadcast(l->u, &msg);
l->holdoff_changed = false;
if (!l->holdoff)
l->holdoff = evtimer_new(ev_base, light_holdoff_event, l);
struct timeval holdoff_time = {
.tv_usec = 40000UL
};
evtimer_add(l->holdoff, &holdoff_time);
l->holdoff_pending = true;
}
int light_set(struct light *l, unsigned value)
{
if (l->aggregate) {
int ec = 0;
for (size_t i = 0; i < l->slave_count; i++)
ec |= light_set(l->slaves[i], value);
return ec;
}
l->holdoff_changed = true;
l->holdoff_value = value;
if (l->holdoff_pending)
return 0;
light_holdoff_event(0,0,l);
return 0;
}
static void light_osc_set(void *arg, struct osc_element *e)
{
struct light *l = arg;
unsigned value;
if (!e)
return;
if (e->type == OSC_INT32)
value = ((struct osc_int32*)e)->value;
else if (e->type == OSC_FLOAT32)
value = 255 * ((struct osc_float32*)e)->value;
else
return;
if (value > 255)
value = 255;
light_set(l, value);
}
unsigned light_getset(struct light *l)
{
if (l->aggregate) {
unsigned long long sum = 0;
size_t count = 0;
for (size_t i = 0; i < l->slave_count; i++) {
sum += light_getset(l->slaves[i]);
count++;
}
if (count)
return sum / count;
return 0;
}
return l->set.val;
}
unsigned light_getact(struct light *l)
{
if (l->aggregate) {
unsigned long long sum = 0;
size_t count = 0;
for (size_t i = 0; i < l->slave_count; i++) {
sum += light_getact(l->slaves[i]);
count++;
}
if (count)
return sum / count;
return 0;
}
return l->actual.val;
}
static void light_json_handler(void *arg, json_t *json, enum json_subtype type)
{
struct light *l = arg;
struct light *p = l->aggregate ? l->slaves[0] : l;
json_t *lobj = json_object();
json_object_set_new(lobj, "klass", json_string("light"));
json_object_set_new(lobj, "addr", json_integer(p->logical_addr));
json_object_set_new(lobj, "actual", json_integer(light_getact(l)));
if (type != JSON_LONGPOLL)
json_object_set_new(lobj, "actual_ts", json_integer(p->actual.valid));
json_object_set_new(lobj, "actual_tschg", json_integer(p->actual.change));
json_object_set_new(lobj, "set", json_integer(light_getset(l)));
if (type != JSON_LONGPOLL)
json_object_set_new(lobj, "set_ts", json_integer(p->set.valid));
json_object_set_new(lobj, "set_tschg", json_integer(p->set.change));
json_object_set_new(json, l->name, lobj);
}
static void light_can_handler(void *arg, struct can_message *msg)
{
struct light *l = arg;
struct value *v = NULL;
unsigned laddr;
uint8_t dval;
if (l->aggregate)
return;
if ((msg->daddr & CANA_PROTOCOL) == CANA_LIGHT)
v = &l->set;
if ((msg->daddr & CANA_PROTOCOL) == CANA_SENSOR)
v = &l->actual;
if (!v)
return;
laddr = msg->daddr & 0xfff;
if (l->logical_addr < laddr)
return;
if (l->logical_addr - laddr >= msg->dlc)
return;
dval = msg->bytes[l->logical_addr - laddr];
time(&v->valid);
if (dval != v->val || v->change == 0) {
v->val = dval;
time(&v->change);
lprintf("%s: set %02x", l->u->name, dval);
json_bump_longpoll();
}
}
int light_init_conf(json_t *config)
{
struct light *l;
bool aggregate;
if (!json_is_object(config)) {
lprintf("light config must be an object/dictionary");
return 1;
}
if (json_is_integer(json_object_get(config, "addr"))) {
aggregate = false;
} else if (json_is_array(json_object_get(config, "slaves"))) {
aggregate = true;
} else {
lprintf("light config must have an 'addr' key or 'saves'.");
return 1;
}
if (!json_is_string(json_object_get(config, "name"))) {
lprintf("light config must have a 'name' key");
return 1;
}
l = calloc(sizeof(*l), 1);
l->name = strdup(json_string_value(json_object_get(config, "name")));
l->aggregate = aggregate;
if (aggregate) {
json_t *slaves = json_object_get(config, "slaves");
l->slave_count = json_array_size(slaves);
if (!l->slave_count) {
lprintf("Slave array must not be empty.");
return 1;
}
l->slaves = calloc(l->slave_count, sizeof(*l->slaves));
for (size_t i = 0; i < json_array_size(slaves); i++) {
const char *name = json_string_value(
json_array_get(slaves, i)
);
l->slaves[i] = light_find(name);
if (!l->slaves[i]) {
lprintf("Unknown slave '%s'", name);
return 1;
}
}
} else {
l->logical_addr = json_integer_value(
json_object_get(config, "addr")
);
}
l->u = can_register_alloc(l, light_can_handler, "light[%s]", l->name);
l->u->json = light_json_handler;
char buf[1024];
snprintf(buf, sizeof(buf), "/lights/%s/value", l->name);
lprintf("Adding light osc endpoint %s", buf);
osc_server_add_method(osc_server, buf, light_osc_set, l);
*plights = l;
plights = &l->next;
return 0;
}
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