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Nios II-Based Audio-Controlled Digital Oscillograph
https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/dc/2006/c3d.pdf
Nios II-Based Audio-Controlled Digital Oscillograph 339 Figure 2. Front-End Acquisition Circuit Audio Control Module The audio control function implements an audio recognition algorithm and collects external analog audio signals through a microphone. It transforms the audio signal using the WM8731 audio encoding/
Need help to configure the audio CODEC (WM8731) on DE1-SoC ...
https://community.intel.com/t5/Nios-II-Embedded-Design-Suite/Need-help-to-configure-the-audio-CODEC-WM8731-on-DE1-SoC-board/m-p/667285
through the HPS, after that using the audio core in Qsys to get the data from the audio chip. I cannot use NIOS and any OS like Linux. At very first step, the audio CODEC should be configured before using the audio core, and I face the problem. I was making the Qsys project with audio core base on the GHRD. I created the C project in ARM DS-5.
Design and Implementation of NIOS II System for Audio ...
https://www.researchgate.net/publication/285065766_Design_and_Implementation_of_NIOS_II_System_for_Audio_Application
This project deals with the NIOS II system, which reads wave files from an SD card in real time and produces sound output through speakers while providing user …
Audio Core on DE1-SoC
http://www-ug.eecg.toronto.edu/msl/nios_devices/dev_audio.html
The Audio Core is a circuit which simplifies communication between the Nios II processor and the Audio CODEC responsible for converting sound into digital values (enCOding) and vice versa (DECoding). It is essentially 2 pairs of FIFOs (so 4 in total) each 128 entries deep with each pair responsible for sending/receiving samples to/from the LINEOUT/MIC.
Need help to configure the audio CODEC (WM8731) on DE1-SoC ...
https://community.intel.com/t5/Nios-II-Embedded-Design-Suite/Need-help-to-configure-the-audio-CODEC-WM8731-on-DE1-SoC-board/td-p/667285?profile.language=ja
through the HPS, after that using the audio core in Qsys to get the data from the audio chip. I cannot use NIOS and any OS like Linux. At very first step, the audio CODEC should be configured before using the audio core, and I face the problem. I was making the Qsys project with audio core base on the GHRD. I created the C project in ARM DS-5.
Altera University Program Audio core
https://people.ece.cornell.edu/land/courses/ece5760/DE1_SOC/Audio_core.pdf
The Audio core interacts with the Audio CODEC (enCOder/DECoder) on the Altera DE-series boards and provides an interface for audio input and output. 2Functional Description The Audio core facilitates the transfer of audio data with the Audio CODEC chip on the Altera DE-series boards. Data is transferred serially between the FPGA and the CODEC.
ECE 5760- Final Project
https://people.ece.cornell.edu/land/courses/ece5760/FinalProjects/f2010/vs327_rw363/WAV_player/ECE%205760.htm
AUDIO CODEC: We require the digital data from the SD card to be given to the analog LINE OUT of the board to get the music. This part of the system is the Audio Codec. The various modules required to carry out this function are: - The FIFO module: This is a 256 * 16 bits wide buffer used to bridge the NIOS and the DAC. The data from the NIOS is given to this buffer to serialize the …
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