Altera DE2-115 User Manual download pdf (Page 106)

105

Figure 6-24 The Setup of the Music Synthesizer Demonstration

This demonstration shows how to implement an audio recorder and player using the DE2-115 board

with the built-in Audio CODEC chip. This demonstration is developed based on SOPC Builder and

Nios II IDE. Figure 6-25 shows the man-machine interface of this demonstration. Two

push-buttons and six slide switches are used for users to configure this audio system: SW0 is used

to specify recording source to be Line-in or MIC-In. SW1 is used to enable/disable MIC Boost

when the recording source is MIC-In. SW2 is used to enable/disable Zero-Cross Detection for audio

playing. SW3, SW4, and SW5 are used to specify recording sample rate as 96K, 48K, 44.1K, 32K,

or 8K. The 16x2 LCD is used to indicate the Recording/Playing status. The 7-SEG is used to

display Recording/Playing duration with time unit in 1/100 second. The LED is used to indicate the

audio signal strength. Table 6-7 and Table 6-8 summarize the usage of Slide switches for

configuring the audio recorder and player.

1 2 ... 101 102 103 104 105 106 107 108 109 110 111 ... 120 121

No comments

Altera DE2-115 User Manual Page 106