Can Pi2 UART Clock as Pi3

Question

Can Pi2 UART Clock as Pi3

Cheong2K opened this issue 8 years ago · 9 comments

I know that, Pi3 bcm2708.uart_clock=48000000, Pi2 bcm2708.uart_clock=3000000.
Is it possible to make the clock of Pi2 the same as Pi3? I want this because I made a HAT, and my users need to put init_uart_clock in the config.txt, the HAT now is not fully plug-&-play.

Answer 1 · 2016-08-22T14:42:08.000Z

I've dropped a patch into the firmware build machine and a new release should pop out of the other end in the next few days. It will initially be available via rpi-update, but if there are no reports of adverse effects it will be included in a subsequent Raspbian release.

Answer 2 · 2016-08-23T17:53:58.000Z

This is in latest rpi-update firmware.

Answer 3 · 2016-08-23T23:22:30.000Z

Awesome, thank you!

Answer 4 · 2016-09-05T10:14:03.000Z

With Pi Zero, after using apt-get upgrade, it will change the UART back to 3 MHz.

Answer 5 · 2016-09-05T10:16:55.000Z

Yes it will, until we make the next Raspbian release - which should be in the next few weeks. Until then, you need to follow any apt-get upgrade with an rpi-update.

Answer 6 · 2016-09-06T06:09:27.000Z

Thanks, got it!

Answer 7 · 2016-10-27T15:37:24.000Z

Please close if appropriate.

Answer 8 · 2017-04-18T10:50:04.000Z

I have the same question but the other way around: I'm using a Pi2 to communicate with a device running at 300-e-7-1 I found that when I switched to a Pi3 300bps is no longer a possible baud rate (only garbled data) I tried switching the UART (pi3-disable-bt) but that has no effect. Is there a way to solve this? (I'm using Raspbian Jessie lite dd 2017-04-10)

Answer 9 · 2017-04-18T11:37:49.000Z

Please create a new issue for this. Commenting on old issues with details of different problems or questions just annoys all of the watchers.