Guru
Joined: 07/08/2011
Location: AustraliaPosts: 6546
| Posted: 06:52am 06 Sep 2023 |
'
PIN(GP13) = 0
DO
SETPIN GP13,DOUT
SETPIN GP13,DIN
PAUSE 1
LOOP
PIN(GP13) = 0
DO
SETPIN GP13,DOUT
SETPIN GP13,DIN
PAUSE 1
LOOP
This code gives a 20-30uS low pulse every 1mS on a pico running at 250MHz
It needs an external pullup.
I haven't had any reboots on my server since Peter made changes which included the HW watchdog.
Before that I would monitor the RTC and if it had stopped, do a reboot.
This worked because the timer that had a habit of stopping drove the RTC as well as SETTICK and the watchdog.
Jim