Sigma DE2-70 manual Sopc

DE2-70 User Manual

hardware part is built by SOPC Builder under Quartus II. The hardware part includes all the other blocks. The “AUDIO Controller” is a user-defined SOPC component. It is designed to send audio data to the audio chip or receive audio data from the audio chip.

The audio chip is programmed through I2C protocol which is implemented in C code. The I2C pin from audio chip is connected to SOPC System Interconnect Fabric through PIO controllers. In this example, the audio chip is configured in Master Mode. The audio interface is configured as I2S and 16-bit mode. A 18.432MHz clock generated by the PLL is connected to the XTI/MCLK pin of the audio chip through the AUDIO Controller.

		SOPC
50M Hz					Store
RESE_N			SDRAM	SDRAM	Audio
	NIOS II				Data
			Controller
	JTAG		SRAM	SRAM	Nios II
		System	Controller		Program
	UART		PIO	LED/KEY/SW/I2C
		Interconnect
Clock	PLL		LCD	LCD
			Controller
to		Fabric
SDRAM			SEG7	SEG7
SRAM
			Controller
			AUDIO	AUDIO
			Controller

Figure 6.19. Block diagram of the audio recorder and player.

Demonstration Setup, File Locations, and Instructions

•Hardware Project directory: DE2_70_AUDIO

•Bit stream used: DE2P_TOP.sof

•Software Project directory: DE2_70_AUDIO\software\project_audio

•Software Execution File: DE2_70_AUDIO\software\project_auido\audio\debug\audio.elf

•Connect an Audio Source to the LINE-IN port of the DE2-70 board.

•Connect a Microphone to MIC-IN port on the DE2-70 board.

•Connect a speaker or headset to LINE-OUT port on the DE2-70 board.

•Load the bit stream into FPGA. (note *1)

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