Search found 38 matches

by Davidelvig
Wed 2020-07-29 18:44
Forum: Slave Decoder Applications
Topic: Minimal MIDI decoder
Replies: 37
Views: 10056

Re: Minimal MIDI decoder

Brilliant! Implemented in 10 minutes. Thanks @pasi! For those interested, here's a snippet. I added the if (MIDIThroughSPI) clauses to two MIDI message sending methods. void dbMIDISynth::writeTwo(unsigned char a, unsigned char b) { if (MIDIThroughSPI) { uint8_t bytes[4] = {0, a, 0, b}; if (!WriteSDI...
by Davidelvig
Wed 2020-07-29 0:29
Forum: Slave Decoder Applications
Topic: Minimal MIDI decoder
Replies: 37
Views: 10056

Re: Minimal MIDI decoder

Regarding MIDI through SDI while in RT MIDI mode: I have the VS1053b on my own board, running well with RT MIDI initialized at startup. Serial MIDI streams through the Rx pin work well. SCI commands work perfectly (tested for SCI_VOL, SCI_BASS and SCI_MODE for EarSpeaker). I'd like to try sending th...
by Davidelvig
Mon 2020-06-08 18:54
Forum: Microcontroller Software
Topic: VS1053 over voltage risk
Replies: 6
Views: 683

Re: VS1053 over voltage risk

All appears when when the crystal is oscillating, and the SPI query you suggested returns the correct result. I had a bad connection at the 1Mohm resistor. Now the crystal starts oscillating on power up. I'm still tracking down a failure to oscillate when I perform a reset on my main processor chip,...
by Davidelvig
Mon 2020-06-08 15:19
Forum: Microcontroller Software
Topic: VS1053 over voltage risk
Replies: 6
Views: 683

Re: VS1053 over voltage risk

I've just found that the 12.288 crystal is not oscillating when the above symptoms exist. When the crystal oscillates, I get proper pin values.
I'll let you know what I find out.
by Davidelvig
Mon 2020-06-08 0:09
Forum: Microcontroller Software
Topic: VS1053 over voltage risk
Replies: 6
Views: 683

Re: VS1053 over voltage risk

OK, I did have a wiring problem with XRESET, which is now addressed. After that fix (and resetting with XRESET LO for 100ms then left at HI), I get: - RCAP, LEFT, RIGHT and GBUF all are at 1.2v ... but DREQ stays low I have the following set up with resistors at startup. - GPIO0 pulled LO to 0v; and...
by Davidelvig
Wed 2020-06-03 17:01
Forum: Microcontroller Software
Topic: VS1053 over voltage risk
Replies: 6
Views: 683

Re: VS1053 over voltage risk

Thank you!
by Davidelvig
Wed 2020-06-03 6:12
Forum: Microcontroller Software
Topic: VS1053 over voltage risk
Replies: 6
Views: 683

VS1053 over voltage risk

I’ve just populated my second board design with the VS1053. The first worked well. Another device on the new board shares the 1.8v power source. It has been pulling 1.8v up to 2.65v I’ve cut the trace to that other chip, and now the VS1053 has a 1.8v input. The VS1053 is not working as expected yet ...
by Davidelvig
Tue 2020-04-14 20:24
Forum: Slave Decoder Applications
Topic: Eagle library for the VS1053
Replies: 1
Views: 781

Re: Eagle library for the VS1053

Wait... found it here: http://www.vlsi.fi/en/support/download.html, then search for "eagle"
by Davidelvig
Tue 2020-04-14 20:15
Forum: Slave Decoder Applications
Topic: Eagle library for the VS1053
Replies: 1
Views: 781

Eagle library for the VS1053

I have an old one (downloaded in 2019), I think from a zip file from VLSI (VLSI-eagle-lib.lbr) which now appears corrupt when loaded into Autodesk Eagle 9.5.0. I have a copy of the footprint from this library in my own library (copied years ago). It still seems to work. I attached a screen shot from...