Search found 2632 matches

by Panu
Sun 2019-04-21 19:22
Forum: VS1010 Forum
Topic: USB VID & PID
Replies: 2
Views: 38

Re: USB VID & PID

Hi! It's easter holiday now in FI, let's see later next week. Anyway, in VS1010 the USB works differently. For setting serial number, there's a function in the ROM , but to set VID, PID, you need to make your own version of the chapter 9 tables (see ROM source codes) and set the *chapter9 pointer to...
by Panu
Tue 2019-04-16 7:51
Forum: VS1005 and VSOS Software
Topic: Latest VSOS Kernel (3.57) available here.
Replies: 93
Views: 46055

Re: VSIDE 2.46 available

Dear VS1005 developers,

We have updated the VSIDE. The new VSIDE version is 2.46 and it contains the headers and libraries necessary to compile VSOS version 3.57.

Please download and install the new version from here: viewtopic.php?f=2&t=298&p=12683#p12683

-Panu
by Panu
Tue 2019-04-16 7:49
Forum: VSIDE
Topic: VSIDE Current Version Is 2.46
Replies: 3
Views: 11146

VSIDE 2.46

Dear VSDSP Developers, Here is a new version of VSIDE, version 2.46. It has been updated quite a lot. It contains updated C standard library and C standard header files for all devices (VS1000, VS1010, VS1011, VS1003, VS1103, VS1053, VS1063 and VS1005). This should only be a positive change, e.g. im...
by Panu
Mon 2019-04-15 15:16
Forum: Slave Decoder Applications
Topic: Genuine IC from aliexpress
Replies: 4
Views: 49

Re: Genuine IC from aliexpress

Hi! You know the old saying... if something is too good to be true, then it's not true... :) The prices are in Chinese Yuan Renminbi. I took a look, and for example they sell VS1103 for RMB 12,50 which is EUR 1.65 today. Our webshop price for 1K quantity is EUR 1.59. It's just those companies style ...
by Panu
Mon 2019-04-15 12:35
Forum: Slave Decoder Applications
Topic: VS1003 + TPA3128D2 (Class D)
Replies: 2
Views: 24

Re: VS1003 + TPA3128D2 (Class D)

Hi! Wouldn't it be easier to adjust the gain of the TPA3128? You can adjust the gain from 20 to 36 dB with resistors connected to the GAIN/SLV pin of that amplifier. The difference of 330 mVpp to 260 mVpp is about 2.1 decibels, so you could just increase your gain by 2 dB to get the same effect. -Panu
by Panu
Mon 2019-04-15 11:30
Forum: Slave Decoder Applications
Topic: Genuine IC from aliexpress
Replies: 4
Views: 49

Re: Genuine IC from aliexpress

10pcs-lot.jpg This picture is an image manipulation, so it's not possible to say anything about whether the chip(s) they claim to sell are real or not. But the picture is not real, it's edited from an old picture. Other websites have used the same image as basis. The lot ID matches VS1011E produced...
by Panu
Mon 2019-04-08 9:09
Forum: VS1005 and VSOS Software
Topic: MP3Model/MP3 Codec file seeking behaviour
Replies: 15
Views: 128

Re: MP3Model/MP3 Codec file seeking behaviour

Hi! I think It happens because MP3 is a streaming format, e.g. it doesn't have any notion of sample counting. MP3 was originally designed for satellite radio broadcasting, not for a file format so the file doesn't have any sample counters or index. When the codec seeks to a position, it needs to dec...
by Panu
Wed 2019-04-03 19:36
Forum: VS1005 and VSOS Software
Topic: VS1005 RTC Frequency tolerance
Replies: 9
Views: 141

Re: VS1005 RTC Frequency tolerance

Hmm, I once did a tariffe clock design for an electricity metering company. You know, tariffe clocks have a very strict requirement for timekeeping accuracy. There I used the electric grid for the accuracy - the number of 50 Hz cycles per day is maintained by atomic clock each day: the Nordic Grid c...
by Panu
Thu 2019-03-28 11:15
Forum: VS1005 and VSOS Software
Topic: VS1005 RTC Frequency tolerance
Replies: 9
Views: 141

Re: VS1005 RTC Frequency tolerance

Hi! Ha! What an intriguing question! But out of your choices, #1 is closer to the truth. The RTC oscillator itself has a wide operating range, but the 100 ppm requirement for the crystal is just to get meaningful results when interpreting the frequency as a basis for calculating either time or lengt...
by Panu
Tue 2019-03-26 9:07
Forum: VS23S010 Forum
Topic: A few VS23S040 questions
Replies: 9
Views: 199

Re: A few VS23S040 questions

Ok, that's good. Hmm, you mentioned resistor values in your earlier mail. The thing to twist one's head around is that the DAC output of the VS23S0x0 is current mode output. It outputs a constant amount of milliamperes at a constant value of the DAC, not a constant voltage. The current is converted ...