VSDSP Forum

Hello I have found the solution. Turns out I miss read the data sheet. The amplitude of a line input pin is reported as 2500mVpp. The dev platform I was working with had no biasing circuit on the line input so I assumed this meant that the ADC was expecting a signal range of -1250mV to 1250mV. The A...

Hello, I am attempting to make .ogg recordings using the VS1053b as a slave device to an nRF52840 master microcontroller. I am observing some strange behavior in the recordings. Negative samples appear to be getting clipped at a given percentage of the amplitude of the signal. The following pictures...

Final update to this thread. I swapped a new VS1053b chip into my development set up and the whole things runs perfectly now. I believe I damaged the microphone amplifier/multiplexor system earlier in development. Major take always from this project so far have been that the mic and line inputs have...

I have a somewhat interesting update to make to this discussion. I decided to try a stereo, two line set up with the right channel running into line 2 and the left channel running into line 1. On the firmware side, I loaded a stereo encoder package ("venc44k2q05.plg") and configured the li...

Hello Pasi, thank you for the suggestions. In responce to your queries, I listed the following remarks. 1. To the best of my knowledge I am recording valid .ogg files. I will attach an example of such a recording with the mono plugin to this reply. 2. When making stereo recordings I am seeing the sa...

Hello, I have a VS1053b configured as a slave device to an nRF52840 microcontroller. When I try to preform an ogg vorbis recording the resulting file is just low volume noise. I am using the line 1 input with a song played from the audio jack in my phone as the input signal. As far as I know the inp...

Hello Pasi,

Thanks for the response. It turns out I had my clock speed configured improperly. Simple fix when I found the problem.

Thanks,
Connor

Hello I have implemented a software reset function for my VS1053 driver. In this function, among other operations, the patches plugin is loaded. this loading takes upwards of 17 seconds. Is this normal? Is there a way to speed this loading up? I will enclose my software reset function for reference ...

Hello, thank you for the reply.

I checked my assertions of xCS and xDS and re-timed them to reflect the VS1053b datasheet. I also slowed the clock speed. This fixed my problem and I can read/write to the chip's registers as desired. Thank you for your recommendations.

Cheers,
Connor

Hello, I am trying to establish my nrf52840 chip as master over the VS1053b to enable audio recording and playback features in my device. I am having trouble confirming initialization of the VS1053b. Specifically, when I preform a read operation for the serial command interface (SCI) I receive eithe...