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newlib: implement settimeofday, integrate LwIP SNTP, add SNTP example

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Ivan Grokhotkov
2016-11-03 12:46:46 +08:00
parent c534dedf2d
commit eb2c633cbf
9 changed files with 314 additions and 9 deletions
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6
components/esp32/Kconfig
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@@ -324,7 +324,7 @@ choice ESP32_TIME_SYSCALL
default ESP32_TIME_SYSCALL_USE_RTC_FRC1
help
This setting defines which hardware timers are used to
implement 'gettimeofday' function in C library.
implement 'gettimeofday' and 'time' functions in C library.
- If only FRC1 timer is used, gettimeofday will provide time at
microsecond resolution. Time will not be preserved when going
@@ -336,8 +336,8 @@ choice ESP32_TIME_SYSCALL
deep sleep, but time will be measured at 6.(6) microsecond
resolution. Also the gettimeofday function itself may take
longer to run.
- If no timers are used, gettimeofday function return -1 and
set errno to ENOSYS.
- If no timers are used, gettimeofday and time functions
return -1 and set errno to ENOSYS.
config ESP32_TIME_SYSCALL_USE_RTC
bool "RTC"