Sigma DE2-70 User Manual

 

DE2-70 User Manual

 

23 

 

 
 

 

Figure 3.12.    Audio Recording and Saving as a WAV file. 

 

To record audio sound from LINE-IN port, please connect an audio source to the LINE-IN port on 

the board. The operation is as same as recording audio from MIC.   

 

The DE2-70 Control Panel is based on a NIOS II system running in the Cyclone II FPGA with the 

SDRAM-U2 or SSRAM. The software part is implemented in C code; the hardware part is 

implemented in Verilog code with SOPC builder, which makes it possible for a knowledgeable user 

to change the functionality of the Control Panel. The code is located inside the 

DE2_70_demonstrations directory on the DE2 System CD-ROM.  

 

To run the Control Panel, users must first configure it as explained in Section 3.1. Figure 3.13 

depicts the structure of the Control Panel. Each input/output device is controlled by the NIOS II 

Processor instantiated in the FPGA chip. The communication with the PC is done via the USB 

Blaster link. The NIOS II interprets the commands sent from the PC and performs the 

corresponding actions.