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用EEPROM對(duì)大容量FPGA芯片數(shù)據(jù)實(shí)現(xiàn)串行加載

作者: 時(shí)間:2010-03-03 來源:網(wǎng)絡(luò) 收藏

  雖然該程序是針對(duì)XCV100芯片及AT29C010A 設(shè)計(jì)的,但對(duì)于其他芯片同樣適用,不同的是針對(duì)不同容量的,應(yīng)改變其地址計(jì)數(shù)器的位數(shù)。

  Library IEEE;
Use IEEE.Std_logic_1164.a(chǎn)ll;
Use ieee.Std_logic_arith.all;
Use ieee.Std_logic_unsigned.all;
Entity v10sload is
port 
pDATA in STD_LOGIC_VECTOR 7 downto 0 
Paddress inout STD_LOGIC_VECTOR 16
Downto 0 
CCLKIN in STD_LOGIC
RESET in STD_LOGIC
DATAINout STD_LOGIC
 
end v10sload

  architecture v10sload_arch of v10sload is
signal loadin CE Nce CCLK8 Nreset nCCLK aDATAIN
bDATAIN std_logic
signal clkenable CCLK std_logic
signal ppDATA std_logic_vector 7 downto 0 
component clk_div8
PORT
CLOCKASYNC_CTRL IN std_logic
CLK_OUT OUT std_logic 
end component
component R_shift8
PORT
D_IN IN std_logic_vector 7 DOWNTO 0 
LOAD IN std_logic
CLK_EN IN std_logic
CLOCK IN std_logic
LS_OUT OUT std_logic 
end component
component BUFG
port I in std_logic O out std_logic 
end component
begin
-------------------------------
--data-loading function statements here
nRESET<=not RESET
init_dataprocessRESET 
begin
if RESET='0'  then
ppDATA<=″00000000″
else ppDATA<=pDATA
end if
end process init_data
L0 BUFG port mapI=>CCLKIN O=>CCLK 
nCCLK<=not CCLK
L1counter17 portmap
CLOCK=>CCLK8ASYNC_CTRL=>nRESET
Q_OUT=>pADDRESS 
L2 clk_div8 portmap
CLOCK=>nCCLKASYNC_CTRL=>nRESET
CLK_OUT=>CCLK8 
nCE<=not pADDRESS0 
CE<=pADDRESS0 
clkenable<='1'
L3R_shift8 portmap
D_IN=>ppDATALOAD=>nCECLK_EN=>
clkenableCLOCK=>nCCLK
LS_OUT=>aDATAIN 
L4R_shift8 portmap
D_IN=>ppDATALOAD=>CECLK_EN=>
clkenableCLOCK=>nCCLK
LS_OUT=>bDATAIN 
Process Adatain bDATAIN CE 
begin
if CE='1'  then DATAIN<=dDATAIN
else DATAIN<=bDATAIN
end if
end process
end v10sload_arch

  參考文獻(xiàn)

  1 XILINX 公司DATABOOK,199954~56

  2 XILINX公司網(wǎng)站www.xilinx.com

  3 王小軍.VHDL 簡(jiǎn)明教程.北京:清華大學(xué)出版社,1997


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關(guān)鍵詞: EEPROM FPGA 串行加載

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