Search found 85 matches

by Jakobsen
Sat Feb 04, 2017 10:55 pm
Forum: Showcase
Topic: ESP32 Webradio
Replies: 185
Views: 162774

Re: ESP32 Webradio

Hi Buddy
I have commited my 2ch update to you repo - please let me know if i succeeded - I am a svn guy :-)
/j
by Jakobsen
Thu Feb 02, 2017 8:28 am
Forum: General Discussion
Topic: ESP32 price
Replies: 7
Views: 6174

Re: ESP32 price

I will agree - size matters Espressif has played the integration card an popped what use to be 3-4 chips or modules into one single chip - We at Merus Audio has played the card of integration. With a single 9x9mm package we integrate 24 bits audio DACs together with 4 channel power amplifiers that c...
by Jakobsen
Tue Jan 31, 2017 3:27 pm
Forum: Showcase
Topic: ESP32 Webradio
Replies: 185
Views: 162774

Re: ESP32 Webradio

Hi I have stable stereo mp3 audio through the device - I need to do some small code clean up and expect to commit by the end of the week. Very nice work from all involved. Single issue outstanding is the clock jitter due to APLL not correct setup/running. I measured the i2s_bck clock jitter for 128 ...
by Jakobsen
Fri Jan 27, 2017 2:56 pm
Forum: Showcase
Topic: ESP32 Webradio
Replies: 185
Views: 162774

Re: ESP32 Webradio

Yes I will get you some number on the bck jitter - and the APLL buggy frequency calculation is now were to be found.

/j
by Jakobsen
Fri Jan 27, 2017 2:52 pm
Forum: Showcase
Topic: ESP32 Webradio
Replies: 185
Views: 162774

Re: ESP32 Webradio

I did try to enable the clka_en bit in the i2s_reg io inteface but there are properly more to setup that baby. union { struct { uint32_t clkm_div_num: 8; uint32_t clkm_div_b: 6; uint32_t clkm_div_a: 6; uint32_t clk_en: 1; uint32_t clka_en: 1; uint32_t reserved22: 10; }; uint32_t val; } clkm_conf; Th...
by Jakobsen
Fri Jan 27, 2017 10:02 am
Forum: News
Topic: ANNOUNCEMENT: Chinese new years holiday Jan 27 - Feb 2
Replies: 1
Views: 4470

Re: ANNOUNCEMENT: Chinese new years holiday Jan 27 - Feb 2

Happy New years holiday

Very impressed with what you have created - We will hack on....

/jørgen
by Jakobsen
Thu Jan 26, 2017 9:04 am
Forum: Hardware
Topic: [Answered] What are the ADC input ranges?
Replies: 17
Views: 48545

Re: What are the ADC input ranges?

Hi Kolban I did poke around with the ADC on the ESP32 and fund that 3V3 gave full house on the ADC output value. But the result was very noisy - also reported by others - and in the given setup not ok for my application (<10 mV resolution needed) By the way thanks for the work you have put into your...
by Jakobsen
Thu Jan 26, 2017 12:17 am
Forum: Showcase
Topic: ESP32 Webradio
Replies: 185
Views: 162774

Re: ESP32 Webradio

Hi Spirit and BuddyCasino Thanks a lot - Rockon here. http://5.103.131.182/esp32/img/esp32_web_radio_stereo_32bits.png TX_FIFO_MOD = 2 did the trick, rolled back my changes on the i2s driver. I now have full 32 bits through the DMA/i2s hardware and into my amplifier. Even enabled the stereo mode to ...
by Jakobsen
Wed Jan 25, 2017 11:41 am
Forum: Showcase
Topic: ESP32 Webradio
Replies: 185
Views: 162774

Re: ESP32 Webradio

Hi Spirte Thangs a lot looking into to this. I did poke around with TX_FIFO_MOD in my search to get 32 bits out of you impressive chip. From what I saw it did some Left/Right shit around but no sign of live in the 17-32 bit of audio i2s_data stream. But I will give it a try tonight. I succeed last n...
by Jakobsen
Tue Jan 24, 2017 8:32 pm
Forum: Showcase
Topic: ESP32 Webradio
Replies: 185
Views: 162774

Re: ESP32 Webradio

Hi BuddyCasino I mite have chance other place ind the i2s driver - I will clean up later tonight and do a simpler hack to the driver layer. The i2s driver used the sample rate and bits pr sample to setup i2s_bck and i2s_ws clock and ratio. For 44100 and 32 bits we get a 1/44100 period i2s_ws and a 2...

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