use core::cmp::min;
use ::log::*;
use esp_idf_sys::*;
use crate::private::cstr::CString;
use crate::private::mutex;
const SNTP_SERVER_NUM: usize = SNTP_MAX_SERVERS as usize;
const DEFAULT_SERVERS: [&str; 4] = [
"0.pool.ntp.org",
"1.pool.ntp.org",
"2.pool.ntp.org",
"3.pool.ntp.org",
];
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
#[cfg_attr(feature = "std", derive(Hash))]
#[cfg_attr(feature = "use_serde", derive(Serialize, Deserialize))]
pub enum OperatingMode {
Poll,
ListenOnly,
}
impl From<u8_t> for OperatingMode {
fn from(from: u8_t) -> Self {
match from as u32 {
SNTP_OPMODE_POLL => OperatingMode::Poll,
SNTP_OPMODE_LISTENONLY => OperatingMode::ListenOnly,
_ => unreachable!(),
}
}
}
impl From<OperatingMode> for u8_t {
fn from(from: OperatingMode) -> Self {
match from {
OperatingMode::Poll => SNTP_OPMODE_POLL as u8_t,
OperatingMode::ListenOnly => SNTP_OPMODE_LISTENONLY as u8_t,
}
}
}
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
#[cfg_attr(feature = "std", derive(Hash))]
#[cfg_attr(feature = "use_serde", derive(Serialize, Deserialize))]
pub enum SyncMode {
Smooth,
Immediate,
}
impl From<sntp_sync_mode_t> for SyncMode {
#[allow(non_upper_case_globals)]
fn from(from: sntp_sync_mode_t) -> Self {
match from {
sntp_sync_mode_t_SNTP_SYNC_MODE_SMOOTH => SyncMode::Smooth,
sntp_sync_mode_t_SNTP_SYNC_MODE_IMMED => SyncMode::Immediate,
_ => unreachable!(),
}
}
}
impl From<SyncMode> for sntp_sync_mode_t {
fn from(from: SyncMode) -> Self {
match from {
SyncMode::Smooth => sntp_sync_mode_t_SNTP_SYNC_MODE_SMOOTH,
SyncMode::Immediate => sntp_sync_mode_t_SNTP_SYNC_MODE_IMMED,
}
}
}
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
#[cfg_attr(feature = "std", derive(Hash))]
#[cfg_attr(feature = "use_serde", derive(Serialize, Deserialize))]
pub enum SyncStatus {
Reset,
Completed,
InProgress,
}
impl From<sntp_sync_status_t> for SyncStatus {
#[allow(non_upper_case_globals)]
fn from(from: sntp_sync_status_t) -> Self {
match from {
sntp_sync_status_t_SNTP_SYNC_STATUS_RESET => SyncStatus::Reset,
sntp_sync_status_t_SNTP_SYNC_STATUS_COMPLETED => SyncStatus::Completed,
sntp_sync_status_t_SNTP_SYNC_STATUS_IN_PROGRESS => SyncStatus::InProgress,
_ => unreachable!(),
}
}
}
pub struct SntpConf<'a> {
pub servers: [&'a str; SNTP_SERVER_NUM],
pub operating_mode: OperatingMode,
pub sync_mode: SyncMode,
}
impl<'a> Default for SntpConf<'a> {
fn default() -> Self {
let mut servers: [&str; SNTP_SERVER_NUM] = Default::default();
let copy_len = min(servers.len(), DEFAULT_SERVERS.len());
servers[..copy_len].copy_from_slice(&DEFAULT_SERVERS[..copy_len]);
Self {
servers,
operating_mode: OperatingMode::Poll,
sync_mode: SyncMode::Immediate,
}
}
}
static TAKEN: mutex::Mutex<bool> = mutex::Mutex::wrap(mutex::RawMutex::new(), false);
pub struct EspSntp {
_sntp_servers: [CString; SNTP_SERVER_NUM],
}
impl EspSntp {
pub fn new_default() -> Result<Self, EspError> {
Self::new(&Default::default())
}
pub fn new(conf: &SntpConf) -> Result<Self, EspError> {
let mut taken = TAKEN.lock();
if *taken {
esp!(ESP_ERR_INVALID_STATE)?;
}
let sntp = Self::init(conf)?;
*taken = true;
Ok(sntp)
}
fn init(conf: &SntpConf) -> Result<Self, EspError> {
info!("Initializing");
unsafe { sntp_setoperatingmode(u8_t::from(conf.operating_mode)) };
unsafe { sntp_set_sync_mode(sntp_sync_mode_t::from(conf.sync_mode)) };
let mut c_servers: [CString; SNTP_SERVER_NUM] = Default::default();
for (i, s) in conf.servers.iter().enumerate() {
let c_server = CString::new(*s).unwrap();
unsafe { sntp_setservername(i as u8, c_server.as_ptr()) };
c_servers[i] = c_server;
}
unsafe {
sntp_set_time_sync_notification_cb(Some(Self::sync_cb));
sntp_init();
};
info!("Initialization complete");
Ok(Self {
_sntp_servers: c_servers,
})
}
pub fn get_sync_status(&self) -> SyncStatus {
SyncStatus::from(unsafe { sntp_get_sync_status() })
}
unsafe extern "C" fn sync_cb(tv: *mut esp_idf_sys::timeval) {
debug!(
" Sync cb called: sec: {}, usec: {}",
(*tv).tv_sec,
(*tv).tv_usec,
);
}
}
impl Drop for EspSntp {
fn drop(&mut self) {
{
let mut taken = TAKEN.lock();
unsafe { sntp_stop() };
*taken = false;
}
info!("Dropped");
}
}