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2 Commits

Author SHA1 Message Date
robert-hh 99221cd118 mimxrt: Fix cycle counter for time.ticks_cpu() and machine.bitstream(). 
Prior to this commit mp_hal_ticks_cpu() was not started properly.  It only
started when the code was executed with a debugger attached, except for the
Teensy (i.MXRT1062) boards.  As an additional fix, the CYYCNT timer is now
started at boot time.

Also rename mp_hal_ticks_cpu_init() to mp_hal_ticks_cpu_enable().
 2021-10-25 15:50:44 +11:00
Damien George 7408ca1d78 mimxrt: Improve ticks and sleep functions using GPT. 
SysTick cannot wake the CPU from WFI/WFE so a hardware timer is needed to
keep track of ticks/delay (similar to the nrf port).

Fixes issue #7234.

Signed-off-by: Damien George <damien@micropython.org>
 2021-05-18 22:36:32 +10:00