DIY: STM32F103C8T6 (“Blue Pill”) + Oled (TFT-) Display..

okay,
bought some STM32F103C8T6 (“Blue Pill”) of about 1,55€ (1,72$) !! at Aliexpress->Link
thought i could use it for my planned own DIY-DAC to display input-source, samplerate, filter-settings, volume etc..

also a 2.6 ” TFT (240X320)->Link (Youtube-Vid is with an 0.96 OLED)

 

 

 

you can program/flash it with a Raspberry Pi->Link, no need for a usb-ttl adapter or ST-Link or something..

so, and with this Arduino IDE u can write some little programms/”sketches” and write/upload them directly to the chip..
now i must a find a way to read out some information (from maybe a XMOS-USB-Bridge) about the samplerate for example, or maybe which input (USB (I2S), opt, coax) and write it out on a display..
but super no clue at present !! 😉 , i´ll inform you here about some progress..

UPDATE: MoodeAudio V4 Beta9 + ES9028Q2M (chinese-board) (DoP)

okay,
got here after a few updates Beta9 to work..
tried a lot, but with at present only “Generic 2 I2S-hifiberry-dac” settings available and without the advanced or realtime-kernel i got only max 192khz over the bus..(with this ES9028Q2M)
so i fiddled a lit bit around with the DSD-settings, and it was only “DoP”-possible (see pictures) (not native DSD !! afaik – but have no problem with that here) with this board + actual settings but u have to set “Sox resampling=enabled” and “DoP=yes”..curiously with sox resampling disabled-> no DoP !! (just for info)
DoP -> “yes”:

(DoP “no”->then no native DSD also->only PCM):

(rem.: it displays “DSD” anyway->its related to the file (extension)) 

(Update: Moode V4 Beta9 as 2.6GB compressed to 920MB image here->Link (Google-Drive))

New ES9038Q2M Chinese-Board – pictures..

here are btw. some new ES9038Q2M-chinese-board pictures..
the board-layout seems to be changed to 1.04 and you can see how you can apply a input-selector switch to this..
(connected to JP2 and JP3; as described earlier and again on picture 3)
(basically you can do this too with another selektor on the other pins, so that u can change the different digital filter settings..(FIRs))


(Beware: according to some sources 0=Connection , X=Disjoin !!!)
(ES9038Pro+TFT Console->Audiodesignguide->Link)

OP-AMPS CHANGE (PART 2)->NE5532 to Muses8920->different, more musicality, very soft..

okay,
this time i changed the onboard NE5532 from the ES9018K2M to Muses8920 and the result is:
Different 😉

first, absolut no comparison to the OPA2604 (in any case to those i had here)->they were really bad..
These Muses8920 have a great musicality, and a very fine resolution but at present it lacks of something (in comparison to the NE5532)..
(so, here i have stop for a moment, because i have to re-check them in a few days..)
more to come…

MoodeAudio **FREE** !! (FOSS-license) Version 4 Beta 6 – RPI-3 (+ES9028Q2M)

absolute fabulous !!

Moode-Audio Ver.4 Beta 6 is now available via:
http://www.moodeaudio.org !!
problem is u have to compile/set it up more or less by yourself..
U only get some moode-audio-files (.zip) but has also to download debian-stretch-lite and make/bring it via a lot !! of shell-commands to work..
For me it took about 4 !! hours..
so for this reason, i decided it to upload the SD-Card-Image (about 2.5GB) to “Google-Drive” (for other, not so “Linux-Enthusiasts” 😉 )->use “Win32DiskImager” or similar to write it to SD-Card..but be careful its under the GNU GPL-free license !!
Debian-Stretch-Lite->LINK (orig. Raspberry.org)
MoodeV4.0Beta6-files(+recipe)->LINK
(Update: thx to someone over at the MoodePlayer-Forum Link here is an Image of Beta9 at Google-Drive-> (2.4GB compressed to 918MB)-> Link (Google-Drive)
(rem.:this is the so called “BASIC/no extras”-Installation, without wiringpi,rotary-thing and without additional components (u can install them then by yourself)
so, Settings for the ES9028Q2M (for now):
got only “RPI-Dac” to work; but limited to 192khz as said..”Hifiberry-DAC” only works with mp3/: ->flacs->horrible noise..(if in 16bit->try to set min. 24bit in “MPD-Settings”)
try to check more options->post it then here..
Installed squeezelite too, and for the first time, NO loud clicks by switching from 16/44 flac par example to 24/96 or 24/192..
(->more here->http://www.diyaudio.com/forums/pc-based/271811-moode-audio-player-raspberry-pi-1041.html)

ES 9028Q2M + STM 8S103F3

hi there, just read here:->
“it seems that there is already an MCU fitted (ST’s STM 8S103F3) programmed to allow access to some of the es9028 internal hardware functions (volume etc)…”
->LINK
(additional link->LINK)

guess on the “newer” ES9028Q2M´s (layout “2017 04 09”) there is this STM 8S103F3 and there is also a 4 pin header (5V+, SWIM,GND, Reset) to program/read out them..(SWIM-interface)


so, now is the question if someone has ever read out that eeprom (on these boards) or re-programed (and with what ?)..
any comments here concerning this topic are really,really appreciated !!

(SWIM->ST-Link-Raspberry Pi->http://kuku.eu.org/?projects/stm8spi/stm8spi )

New ES9038Q2M´s out..

see this:

Description:
This product is finished board, using the latest audio DAC ES9038 Q2M as the core design, comprehensive deep software control optimization, PCM DSD switch no sonic, 3 groups of inputs can be simultaneously access, jumper smooth switch
Product features are as follows:
1. Onboard MCU MCU, used as a pure IIS / DSD input DAC board
2. Support coaxial and fiber input, support PCM44.1Khz-192Khz / DSD64 hard solution
3. Onboard to provide volume control interface, connect a single 10KR or so potentiometer that can achieve volume control.
4.ES9038Q2M better than the previous generation ES9028Q2M sound, thicker thick flow, direct support for coaxial fiber DOP, DSD direct solution, 129dB DNR -120dB THD + N quite excellent.
5. With the board default 5532DD op amp, use the transport seat to facilitate the customer to upgrade the fever of the op amp
6. The use of imported high-precision active crystal
7. The use of high-quality gold-plated RCA, metal shield headphone output interface
8. Carrier signal lock indicator and DSD signal indicator
Input support:
Coaxial: PCM44.1K-192K 24BIT / DOP DSD64
Fiber: PCM44.1K-192K 24BIT / DOP DSD64
IIS / DSD: PCM44.1K-384K 32BIT / DSD64, DSD128, DSD256
Output: Dual-channel single-ended RCA output, 3.5 headphone monitor output
Power supply: regulated DC voltage double 15V or regulated DC voltage single 15V
* It is recommended to use dual 15V power supply to play board best results

Ebay->26$ (incl.Shipping)->LINK

(more information also here (about the chip)->http://bbs.hifidiy.net/thread-1257220-1-1.html)

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