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Results tagged with pi-3
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user 50005
For questions that apply specifically to the Raspberry Pi 3 and not other/all models.
2
votes
2
answers
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Raspberry Pi 3 Model B Timers
Since BCM2837 is a cortex-A53, it should have architected timers accessible through CNT* registers. Does Pi 3 have one for each core? Are they free running or derived from the GPU timers as before? If …
- 173
0
votes
Accepted
Raspberry Pi 3 Model B Timers
I'm reposting my own summarizing response at the official forum.
I've dived more deeply into the BCM2836 document today https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm2836/QA7_rev3 …
- 173
1
vote
1
answer
227
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Simple bare metal code on Pi 3 doesn't work
I'm trying to run this bare metal code to turn BCM16 on. The code is made into raw binary and config.txt contains the necessary kernel= attribute. I measured with multimeter; nothing happened. What co …
- 173
0
votes
Accepted
Simple bare metal code on Pi 3 doesn't work
Just copying my comment here.
Someone in the official forum has figured out a bug regarding e3a01007 mov r1, #7, which should be #1, in order to set it to output function.
It was indeed the why …
- 173
2
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0
answers
603
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Understanding the memory map in QA7 document on the official website
The description of the first row says "GPU access". That looks confusing. Isn't the memory split for CPU and GPU usage?
From most other sources the peripheral base is 0x3f000000. Why does it say 0x …
- 173