/*
* Gets statistics from lowlevel backend and writes it to "backend" section
*/
static void fill_backend_backend(rapidjson::Value &stat_value,
rapidjson::Document::AllocatorType &allocator,
const struct dnet_backend_io *backend,
const dnet_backend_info *config_backend) {
char *json_stat = NULL;
size_t size = 0;
struct dnet_backend_callbacks *cb = backend->cb;
if (cb->storage_stat_json) {
cb->storage_stat_json(cb->command_private, &json_stat, &size);
if (json_stat && size) {
rapidjson::Document backend_value(&allocator);
backend_value.Parse<0>(json_stat);
auto &config_value = backend_value["config"];
config_value.AddMember("group", config_backend->group, allocator);
config_value.AddMember("queue_timeout", config_backend->queue_timeout, allocator);
rapidjson::Document initial_config(&allocator);
initial_config.Parse<0>(config_backend->initial_config.c_str());
backend_value.AddMember("initial_config",
static_cast<rapidjson::Value&>(initial_config),
allocator);
stat_value.AddMember("backend",
static_cast<rapidjson::Value&>(backend_value),
allocator);
}
}
free(json_stat);
}
//Initialise sensor for spo2 and hr measurements
static void init_sensor(){
uint8_t int_mask; //Interrupt mask
max30100_config_t config; //Configuration struct
//Set initial configuration parameters
config.spo2_config = (SPO2_HI_RES_EN //Enable high resolution (LED pulse width = 1.6mS, 16 bit ADC resolution)
| SPO2_SR_100); //Set sampling rate to 100 samples per second
config.mode_config = HR_ONLY_EN; //Enable heart rate only mode
config.led_config = (RED_PA_50_0 //Set red LED current to 50.0mA
| IR_PA_50_0); //Set infra red LED current to 50.0mA
//Configure sensor with initial config parameters at start up
initial_config(config);
}