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| Carambola2 I2S and MBOX (DMA) https://www.8devices.com/community/viewtopic.php?f=13&t=572 |
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| Author: | harryzz [ 12 Nov 2013, 20:54 ] |
| Post subject: | Re: Carambola2 I2S and MBOX (DMA) |
Yes its is "almost" the same. The problem that is floating pdf in the net is too scanty. Someone get more detailed datasheet of this processor? There are really missing some general parts how MBOX DMA works with i2s and how to program audio pll? br harry |
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| Author: | jpc [ 12 Nov 2013, 21:13 ] |
| Post subject: | Re: Carambola2 I2S and MBOX (DMA) |
I still did not have time to sit down and play with the code but from reading through it I think I understand most of the things that were left out from the datasheet (even if some registers are a little bit different) so I would encourange you to try it even if you do not find better a datasheet. I suspect that this is the only one – I had the misfortune to see even worse datasheets in the wild – they just don't expect anybody to write code without using their sample code as a reference (just as with Android SoCs). |
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| Author: | harryzz [ 07 Dec 2013, 14:17 ] |
| Post subject: | Re: Carambola2 I2S and MBOX (DMA) |
root@OpenWrt:~/.mpd/playlists# cd root@OpenWrt:~# uname -a Linux OpenWrt 3.10.17 #17 Mon Nov 18 17:41:40 EET 2013 mips GNU/Linux root@OpenWrt:~# aplay -L null Discard all samples (playback) or generate zero samples (capture) default:CARD=AR933XSPDIF AR-933X-S/PDIF, Default Audio Device sysdefault:CARD=AR933XSPDIF AR-933X-S/PDIF, Default Audio Device root@OpenWrt:~# some progress with mbox/i2s and ALSA here: http://www.youtube.com/watch?v=FSc9fbIavBU |
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| Author: | FPeter [ 07 Dec 2013, 15:28 ] |
| Post subject: | Re: Carambola2 I2S and MBOX (DMA) |
| Author: | harryzz [ 08 Dec 2013, 11:32 ] |
| Post subject: | Re: Carambola2 I2S and MBOX (DMA) |
Playback is perfect for now only via SPDIF. 44.1/S16. Next week i will test codec from TI. with all supported from hw rates. Capture not implemented for now. br harry |
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| Author: | FPeter [ 08 Dec 2013, 12:44 ] |
| Post subject: | Re: Carambola2 I2S and MBOX (DMA) |
| Author: | harryzz [ 09 Dec 2013, 08:45 ] |
| Post subject: | Re: Carambola2 I2S and MBOX (DMA) |
PCM1771PW - we will try this bcoz is available now. about source - yes but when finished our project. Also need a lot of work to clean dirty code and add other supported features from hardware to driver. br harry |
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| Author: | vikasp [ 11 Dec 2013, 05:27 ] |
| Post subject: | Re: Carambola2 I2S and MBOX (DMA) |
That is some great news , we right now use a cm108 usb dac for the same , would love to use i2c and free up the usb port. |
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| Author: | fuesschen [ 12 Dec 2013, 13:55 ] |
| Post subject: | Re: Carambola2 I2S and MBOX (DMA) |
awesome! do you plan to put the sources direct to the openWRT sources? |
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| Author: | Socrates [ 02 Jan 2014, 19:41 ] |
| Post subject: | Re: Carambola2 I2S and MBOX (DMA) |
And is the driver is compatible to ALSA? |
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