so, lucky me, i got today my 2.6″ (320*240) SPI-TFTLCD-display directly from china, of about 3,40€!! 😉 (inclusive shipping), unbelievable, from Aliexpress..
all in regard of my planned DIY-DAC (see some posts before and therefore the website is all about 😉 ), cause this TFT-LCD should show the input-source (USB,Coax,Opt.), sampling frequency, filter settings (FIRs), Volume (db) and so on.. okay, there was no information on the sellers-site about the chipset in it (and i need the info for the different Arduino+Raspberry GFX-libraries) i had to google a lot and will now show the „results“: First, in this special TFT is an „ILI9341„; read out on a RPI3B with „fbtft_device“-> second, problem now was, because there were absolute no documentation about the pin-layout on the backside, how to wire it for SPI ? so, a lot of googling again and here are the results Part II.:
so, my final wiring is now: 3,3V (5V is not working) Pin5 from the 6pin header at the bottom->to RPI Pin1 (Power) GND Pin2 from the 6pin header->RPI Pin9 MOSI to MOSI !! means „SD_in“ on the first picture -> RPI pin19 MISO to MISO means „SD_Out“ ->RPI pin21 CS to „SD_CS“ ->RPI pin24 !! (CE0) ((not pin26)->CE1) and SCLK to „SD_SCK“ ->RPI pin23.. (unfortunately i have only a light screen here now, but i guess it has something to do with the software; i will make here an update if necessary).. (just as info for other user with similar problems).. good tuturial: SPI on a raspberry pi->https://www.xgadget.de/anleitung/2-2-spi-display-ili9341-am-raspberry-betreiben/
so, after i looked about some cheap SPDIF (Coax+opt) to I2S converter, i came across these 2 birds: AK4113: (10$ at Ebay & Aliexpress)and CS8416: (12$ at Ebay & Aliexpress) they are both capable of max 192khz input and u can select the input-port via the „BUT“-port switch.. The LCD-display should show the Input-Line and the sample-frequency.. and because there were no wiring diagram on the sellers-site i searched a bit/lot and found some wiring-diagrams for these 2 on audiophonics.fr.. (just in case there were also google-user who are interested in such a diagram)
so, because here is so much feedback/and website-views on this ES9028Q2M i thought i write something about it again.. after thinking about programming this STM 8S103F3 MCU on the board (and see some Arduino IDE tuturials to become a LED blinking par example->https://learn.sparkfun.com/tutorials/sik-experiment-guide-for-arduino—v32/experiment-1-blinking-an-led , super nice a MUST to watch !! 😉 ) and examining the layout i see that there are also these „Vol+“,“Vol-„, „Delay“ (means filter-settings (FIRs) i think) and the „DSD“ + „PCM“ holes for Diodes/LEDs..
so i think u need only an LED (i would say Blue for DSD and Red for PCM) and a 220 Ohm-Resistor->
to make this LEDs „shine“ 😉 also with such Buttons (here i had measurements about 1cm*0,7cm (100mm*70mm)) it must be possible to have a HW-Volume and Filter-Control.. but u have to solder it right 😉 ..
another possibility would also be to solder some 4 Male 2.54mm Pin Header on it, and connect it then to a STM32F103C8T6 by example to control it via this (and with a bluetooth-receiver-transmitter and bluetooth-app par example..) still thinking about; greets for the moment 😉
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..
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 !!
(Attention: cable colors not matching perfectly->just for illustration !!)
Features: Breadboard power supply module, compatible with 5V, 3.3V, apply to MB102 breadboard. Two road independent control, can switch over to 0V, 3.3V, 5V. On-board two groups of 3.3V, 5V DC output pin, convenient for external lead use.
Specifications: Input voltage: 6.5-12V (DC) or USB power supply Output voltage: 3.3V / 5V (switchable) Maximum output current: < 700mA Dimension: Approx. 5.3cm x 3.5cm / 2.1″ x 1.4″
10 Pieces ->5,19€ (incl.shipping) !! on ebay-> LINK
wonderful for external (USB-Powering) 5V Hifi-components, such as the ES9023 Board above or par example these things-> (and you can use 2-3 or more components powered by this breadboard power supply !!) okay,
and second such an „I2S“-Doubler; also absolut wonderful and can also be powered via this Breadboard/5V !!
(Remark: unfortunately not tested here; the breadboard power supply just arrived but havent found the right male-male usb-cable yet, so i have to wait, but i would (will) have had soo much fun with it, i guess 😉 )