DDS波形发生器VHDL源码Word下载.docx

DDS波形发生器VHDL源码Word下载.docx

《DDS波形发生器VHDL源码Word下载.docx》由会员分享，可在线阅读，更多相关《DDS波形发生器VHDL源码Word下载.docx（9页珍藏版）》请在冰点文库上搜索。

--波形选择信号 

"

00"

:

正弦;

01"

三角波;

10"

方波;

11"

不输出（恒为低电平）

-- 

DAOUT:

outstd_logic_vector（7downto0）;

--8位DA输出模拟信号,直通方式,如需时钟控制则要修改

DAOUTX:

DAOUTY:

outstd_logic_vector（7downto0）

）;

end;

architectureDDSofDDSis

signalACC:

std_logic_vector（ACCWidth-1downto0）:

=（others=>

'

0'

signalDAOUT:

std_logic_vector（7downto0）;

begin

process（CLK,STEP）

begin 

if（CLK'

eventandCLK='

1'

）then

ACC<

=ACC+STEP;

endif;

endprocess;

process（CHOICE,ACC）

caseCHOICEis

when"

=>

--正弦

caseACC（ACCWidth-1downtoACCWidth-8）is

when"

00000000"

=>

DAOUT<

="

10000000"

;

00000001"

10000011"

00000010"

10000110"

00000011"

10001001"

00000100"

10001101"

00000101"

10010000"

00000110"

10010011"

00000111"

10010110"

00001000"

10011001"

00001001"

10011100"

00001010"

10011111"

00001011"

10100010"

00001100"

10100101"

00001101"

10101000"

00001110"

10101011"

00001111"

10101110"

00010000"

10110001"

00010001"

10110100"

00010010"

10110111"

00010011"

10111010"

00010100"

10111100"

00010101"

10111111"

00010110"

11000010"

00010111"

11000100"

00011000"

11000111"

00011001"

11001010"

00011010"

11001100"

00011011"

11001111"

00011100"

11010001"

00011101"

11010100"

00011110"

11010110"

00011111"

11011000"

00100000"

11011011"

00100001"

11011101"

00100010"

11011111"

00100011"

11100001"

00100100"

11100011"

00100101"

11100101"

00100110"

11100111"

00100111"

11101001"

00101000"

11101010"

00101001"

11101100"

00101010"

11101110"

00101011"

11101111"

00101100"

11110001"

00101101"

11110010"

00101110"

11110100"

00101111"

11110101"

00110000"

11110110"

00110001"

11110111"

00110010"

11111001"

00110011"

11111010"

00110100"

00110101"

11111011"

00110110"

11111100"

00110111"

11111101"

00111000"

11111110"

00111001"

00111010"

11111111"

00111011"

00111100"

00111101"

00111110"

00111111"

01000000"

01000001"

01000010"

01000011"

01000100"

01000101"

01000110"

01000111"

01001000"

01001001"

01001010"

01001011"

01001100"

01001101"

01001110"

01001111"

01010000"

01010001"

01010010"

01010011"

01010100"

01010101"

01010110"

01010111"

01011000"

01011001"

01011010"

01011011"

01011100"

01011101"

01011110"

01011111"

01100000"

01100001"

01100010"

01100011"

01100100"

01100101"

01100110"

01100111"

01101000"

01101001"

01101010"

01101011"

01101100"

01101101"

01101110"

01101111"

01110000"

01110001"

01110010"

01110011"

01110100"

01110101"

01110110"

01110111"

01111000"

01111001"

01111010"

01111011"

01111100"

01111101"

01111110"

01111111"

10000001"

10000010"

10000100"

10000101"

10000111"

10001000"

10001010"

10001011"

10001100"

10001110"

10001111"

10010001"

DAOU