dylan
New Member
Posts: 5
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Post by dylan on Aug 24, 2020 13:14:10 GMT -8
Hello there,
I am new and would like to connect the dual watchdog board to the raspberry pi 4. The version of the dual watchdog board is 100217-01-001. Could you give me some instructions? Thanks!
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Post by SDL on Aug 25, 2020 14:06:25 GMT -8
Look up the J2 pin header on the Raspberry Pi 4.
GLOBAL_EN is the right input to switch off power in correct seq (not to shutdown OS). You can switch off power completely (including 5V, 3.3V GPIO) by grounding this input. Once released PMIC chip start power up sequence, which results in OS boot.
So, GLOBAL_EN is 'hard reset'. OS should boot on releasing it from GND.
Connect the downward pulsing output on the Watchdog to the GLOBAL_EN line and it will reset the pi when it goes low.
BP
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dylan
New Member
Posts: 5
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Post by dylan on Aug 25, 2020 15:23:47 GMT -8
Hey BP,
Thanks a lot for your quick reply. So here I connect the dual watchdog board to pi4 with Grove Digital:
1) pin 12
2) Global_en
3) pin 1
4) pin 6
Is the connecting right? Thank you!
Dylan
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dylan
New Member
Posts: 5
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Post by dylan on Aug 26, 2020 23:50:37 GMT -8
Hello BP,
I have connected the wires based on the instruction, while the LED lights are always on instead of flashing. Could you help me with this? Thank you!
Dylan
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Post by SDL on Aug 27, 2020 16:47:27 GMT -8
What LED lights are always on? The ones on the Pi or the WatchDog?
Take a picture of your wiring and let me look at it.
BP
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dylan
New Member
Posts: 5
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Post by dylan on Sept 1, 2020 21:08:19 GMT -8
 Hi, The LED lights of watchdog are always on. |
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Post by SDL on Sept 2, 2020 14:25:16 GMT -8
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