DigitalInfinity/ESP32-PaxCounter
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timesync TIME_SYNC_FIXUP

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This commit is contained in:
Verkehrsrot 2019-03-17 22:00:42 +01:00
parent cd67cb2335
commit 5cb875bcfc
2 changed files with 6 additions and 3 deletions
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1
include/timesync.h
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@ -11,6 +11,7 @@
#define TIME_SYNC_TIMEOUT 120 // timeout seconds waiting for timeserver answer
#define TIME_SYNC_TRIGGER 100 // time deviation in millisec triggering a sync
#define TIME_SYNC_FRAME_LENGTH 0x06 // timeserver answer frame length
#define TIME_SYNC_FIXUP 0 // calibration millisec to fixup processing time
void send_timesync_req(void);
int recv_timesync_ans(uint8_t buf[], uint8_t buf_len);

8
src/timesync.cpp
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@ -124,6 +124,8 @@ void process_timesync_req(void *taskparameter) {
// calculate absolute time offset with millisecond precision using time base
// of LMIC os, since we use LMIC's ostime_t txEnd as tx timestamp
time_offset += milliseconds(osticks2ms(os_getTime()));
// apply calibration factor for processing time
time_offset += milliseconds(TIME_SYNC_FIXUP);
// convert to seconds
time_to_set = static_cast<time_t>(myClock_secTick(time_offset).count());
// calculate fraction milliseconds
@ -138,9 +140,9 @@ void process_timesync_req(void *taskparameter) {
TIME_SYNC_TRIGGER) { // milliseconds threshold
// wait until top of second
ESP_LOGD(TAG, "[%0.3f] waiting %d ms", millis() / 1000.0,
1000 - time_to_set_fraction_msec);
vTaskDelay(pdMS_TO_TICKS(1000 - time_to_set_fraction_msec));
uint16_t const wait_ms = 1000 - time_to_set_fraction_msec;
ESP_LOGD(TAG, "[%0.3f] waiting %d ms", millis() / 1000.0, wait_ms);
vTaskDelay(pdMS_TO_TICKS(wait_ms));
// sync timer pps to top of second
if (ppsIRQ) {