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#include "cethcan.h"
struct value {
uint8_t val;
time_t change, valid;
};
struct light {
struct can_user *u;
char *name;
unsigned logical_addr;
struct value set, actual;
};
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 ((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);
}
}
int light_init_conf(json_t *config)
{
struct light *l;
if (!json_is_object(config)) {
lprintf("light config must be an object/dictionary");
return 1;
}
if (!json_is_integer(json_object_get(config, "addr"))) {
lprintf("light config must have an 'addr' key");
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->logical_addr = json_integer_value(json_object_get(config, "addr"));
l->u = can_register_alloc(l, light_can_handler, "light[%s]", l->name);
return 0;
}
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