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b061230056
old: CCOMPARE timer triggers when CCOUNT increase to equal to CCOMPARE, then ISR will increase integer of "_xt_tick_divisor"
to CCOMPARE and wait for next interrupt triggering
now: CCOMPARE timer triggers when CCOUNT increase to equal to CCOMPARE, then ISR will reset CCOUNT to be 0 and reset CCOMPARE
to be integer of "_xt_tick_divisor", then wait for next interrupt triggering
Using the new method, we may get the CCOUNT value without considing if it has overflowed.
System running microseconds = g_os_ticks * microseconds per tick + CCOUNT.
README
esp-idf compile and 'AR' user program as target library 'libmain.a', so we should not use
library which is named 'libmain.a'. We use 'libcore.a' instead of it.
As I konwn, you can do following:
1. rename libmain.a to libcore.a
2. change text
"*libmain.a:spi_flash.o(.literal .text .literal.* .text.*)"
to
"*libcore.a:spi_flash.o(.literal .text .literal.* .text.*)"
in file 'eagle.app.v6.common.ld'