Search found 10 matches

by gmccomb
Tue 2012-05-08 0:37
Forum: Slave Decoder Applications
Topic: VS1053b / VS1103b MIDI Controls
Replies: 8
Views: 8437

Re: VS1053b / VS1103b MIDI Controls

SCI isn't connected and can't be. For this particular project (it's for an article in a popular magazine here in the US) we're using the SparkFun MIDI Instrument Shield, which only supports UART RT-MIDI.
by gmccomb
Sun 2012-04-29 18:40
Forum: Slave Decoder Applications
Topic: 5V interfacing
Replies: 5
Views: 2494

Re: 5V interfacing

Thanks! I understand you must err on the side of caution.
by gmccomb
Sun 2012-04-29 18:39
Forum: Slave Decoder Applications
Topic: VS1053b / VS1103b MIDI Controls
Replies: 8
Views: 8437

Re: VS1053b / VS1103b MIDI Controls

For master volume I take it this is a SysEx command, and follows normal byte sequence for these. All of the other MIDI control statements appear to be working except this one. Do you have an example SysEx byte sequence for this? In case it matters, I'm using a VS1053 and RT MIDI via UART. For testin...
by gmccomb
Thu 2012-04-26 6:14
Forum: Slave Decoder Applications
Topic: 5V interfacing
Replies: 5
Views: 2494

Re: 5V interfacing

Any recommendation on this one? Will a 1K series resistor be satisfactory for 5V and 3.3V MCUs for input (e.g. GPIO and RX) pins?
by gmccomb
Fri 2012-04-13 18:17
Forum: Slave Decoder Applications
Topic: 5V interfacing
Replies: 5
Views: 2494

Re: 5V interfacing

I guess what I'm asking is whether the inputs have diode clamps so that a simple 1K series resistor will suffice. The GPIO and reset inputs don't need to be fast, and we can ignore any issues of current consumption by not using divider resistors. Consider also that the MCU driving the pins may be ei...
by gmccomb
Thu 2012-04-12 1:23
Forum: Slave Decoder Applications
Topic: 5V interfacing
Replies: 5
Views: 2494

5V interfacing

We know the VS10xx (and I assume VS1103) are not 5V tolerant. But we're looking for the simplest way(s) to interface a 5V output line to a VS10xx input -- for example, RESET, GP pin, or Rx. In another message here it was stated a 1K series resistor was acceptable "in most cases." Is it possible to b...
by gmccomb
Fri 2012-04-06 1:27
Forum: Slave Decoder Applications
Topic: Ongoing MIDI support
Replies: 6
Views: 1717

Re: Ongoing MIDI support

Sounds real good.

One more question: you sell and ship direct to North America and/or China, without distributors, correct? Or does one have to go through one of the distributors (e.g SparkFun if in the US)?
by gmccomb
Thu 2012-04-05 18:05
Forum: Slave Decoder Applications
Topic: Ongoing MIDI support
Replies: 6
Views: 1717

Re: Ongoing MIDI support

Oh, and I wanted to add our intended application uses real-time MIDI through the UART, with MIDI from file added as a later enhancement. We want to use the same chip for both, but the initial application will run over 31.5 KB serial to the UART.
by gmccomb
Thu 2012-04-05 17:57
Forum: Slave Decoder Applications
Topic: Ongoing MIDI support
Replies: 6
Views: 1717

Re: Ongoing MIDI support

Thanks for the reply. On the VS8053b, are you saying the documentation is wrong (it's missing the sections on MIDI), or that the part *should* have MIDI enabled but the current process fuses it out? Just want to make sure for product planning purposes. Also, the VS1103, which suits our application p...
by gmccomb
Wed 2012-04-04 2:23
Forum: Slave Decoder Applications
Topic: Ongoing MIDI support
Replies: 6
Views: 1717

Ongoing MIDI support

I am curious regarding ongoing MIDI support, especially via UART real time. I've noticed several of the newest chips lacks MIDI, though they are full-featured otherwise. For example, the VS1063 is said to be "a drop-in replacement for VS1053," but it's not exactly, because MIDI has been removed. Was...