// -------------------------------------------------------------------- // Copyright (c) 2005 by Terasic Technologies Inc. // -------------------------------------------------------------------- // // Permission: // // Terasic grants permission to use and modify this code for use // in synthesis for all Terasic Development Boards and Altera Development // Kits made by Terasic. Other use of this code, including the selling // ,duplication, or modification of any portion is strictly prohibited. // // Disclaimer: // // This VHDL/Verilog or C/C++ source code is intended as a design reference // which illustrates how these types of functions can be implemented. // It is the user's responsibility to verify their design for // consistency and functionality through the use of formal // verification methods. Terasic provides no warranty regarding the use // or functionality of this code. // // -------------------------------------------------------------------- // // Terasic Technologies Inc // 356 Fu-Shin E. Rd Sec. 1. JhuBei City, // HsinChu County, Taiwan // 302 // // web: http://www.terasic.com/ // email: support@terasic.com // // -------------------------------------------------------------------- // // Major Functions: DE2 Default Bitstream // // -------------------------------------------------------------------- // // Revision History : // -------------------------------------------------------------------- // Ver :| Author :| Mod. Date :| Changes Made: // V1.0 :| Johnny Chen :| 05/08/19 :| Initial Revision // V1.1 :| Sean Peng :| 05/09/30 :| Changed CLOCK, SW, LEDG/R // according to Zvonko's requests. // V1.2 :| Johnny Chen :| 05/11/16 :| Add to FLASH Address FL_ADDR[21:20] // V1.3 :| Johnny Chen :| 05/12/12 :| Fixed VGA_Audio_PLL Initial Sequence. // -------------------------------------------------------------------- module DE2_Default ( //////////////////// Clock Input //////////////////// CLOCK_27, // 27 MHz CLOCK_50, // 50 MHz EXT_CLOCK, // External Clock //////////////////// Push Button //////////////////// KEY, // Pushbutton[3:0] //////////////////// DPDT Switch //////////////////// SW, // Toggle Switch[17:0] //////////////////// 7-SEG Dispaly //////////////////// HEX0, // Seven Segment Digit 0 HEX1, // Seven Segment Digit 1 HEX2, // Seven Segment Digit 2 HEX3, // Seven Segment Digit 3 HEX4, // Seven Segment Digit 4 HEX5, // Seven Segment Digit 5 HEX6, // Seven Segment Digit 6 HEX7, // Seven Segment Digit 7 //////////////////////// LED //////////////////////// LEDG, // LED Green[8:0] LEDR, // LED Red[17:0] //////////////////////// UART //////////////////////// UART_TXD, // UART Transmitter UART_RXD, // UART Receiver //////////////////////// IRDA //////////////////////// IRDA_TXD, // IRDA Transmitter IRDA_RXD, // IRDA Receiver ///////////////////// SDRAM Interface //////////////// DRAM_DQ, // SDRAM Data bus 16 Bits DRAM_ADDR, // SDRAM Address bus 12 Bits DRAM_LDQM, // SDRAM Low-byte Data Mask DRAM_UDQM, // SDRAM High-byte Data Mask DRAM_WE_N, // SDRAM Write Enable DRAM_CAS_N, // SDRAM Column Address Strobe DRAM_RAS_N, // SDRAM Row Address Strobe DRAM_CS_N, // SDRAM Chip Select DRAM_BA_0, // SDRAM Bank Address 0 DRAM_BA_1, // SDRAM Bank Address 0 DRAM_CLK, // SDRAM Clock DRAM_CKE, // SDRAM Clock Enable //////////////////// Flash Interface //////////////// FL_DQ, // FLASH Data bus 8 Bits FL_ADDR, // FLASH Address bus 22 Bits FL_WE_N, // FLASH Write Enable FL_RST_N, // FLASH Reset FL_OE_N, // FLASH Output Enable FL_CE_N, // FLASH Chip Enable //////////////////// SRAM Interface //////////////// SRAM_DQ, // SRAM Data bus 16 Bits SRAM_ADDR, // SRAM Address bus 18 Bits SRAM_UB_N, // SRAM High-byte Data Mask SRAM_LB_N, // SRAM Low-byte Data Mask SRAM_WE_N, // SRAM Write Enable SRAM_CE_N, // SRAM Chip Enable SRAM_OE_N, // SRAM Output Enable //////////////////// ISP1362 Interface //////////////// OTG_DATA, // ISP1362 Data bus 16 Bits OTG_ADDR, // ISP1362 Address 2 Bits OTG_CS_N, // ISP1362 Chip Select OTG_RD_N, // ISP1362 Write OTG_WR_N, // ISP1362 Read OTG_RST_N, // ISP1362 Reset OTG_FSPEED, // USB Full Speed, 0 = Enable, Z = Disable OTG_LSPEED, // USB Low Speed, 0 = Enable, Z = Disable OTG_INT0, // ISP1362 Interrupt 0 OTG_INT1, // ISP1362 Interrupt 1 OTG_DREQ0, // ISP1362 DMA Request 0 OTG_DREQ1, // ISP1362 DMA Request 1 OTG_DACK0_N, // ISP1362 DMA Acknowledge 0 OTG_DACK1_N, // ISP1362 DMA Acknowledge 1 //////////////////// LCD Module 16X2 //////////////// LCD_ON, // LCD Power ON/OFF LCD_BLON, // LCD Back Light ON/OFF LCD_RW, // LCD Read/Write Select, 0 = Write, 1 = Read LCD_EN, // LCD Enable LCD_RS, // LCD Command/Data Select, 0 = Command, 1 = Data LCD_DATA, // LCD Data bus 8 bits //////////////////// SD_Card Interface //////////////// SD_DAT, // SD Card Data SD_DAT3, // SD Card Data 3 SD_CMD, // SD Card Command Signal SD_CLK, // SD Card Clock //////////////////// USB JTAG link //////////////////// TDI, // CPLD -> FPGA (data in) TCK, // CPLD -> FPGA (clk) TCS, // CPLD -> FPGA (CS) TDO, // FPGA -> CPLD (data out) //////////////////// I2C //////////////////////////// I2C_SDAT, // I2C Data I2C_SCLK, // I2C Clock //////////////////// PS2 //////////////////////////// PS2_DAT, // PS2 Data PS2_CLK, // PS2 Clock //////////////////// VGA //////////////////////////// VGA_CLK, // VGA Clock VGA_HS, // VGA H_SYNC VGA_VS, // VGA V_SYNC VGA_BLANK, // VGA BLANK VGA_SYNC, // VGA SYNC VGA_R, // VGA Red[9:0] VGA_G, // VGA Green[9:0] VGA_B, // VGA Blue[9:0] //////////// Ethernet Interface //////////////////////// ENET_DATA, // DM9000A DATA bus 16Bits ENET_CMD, // DM9000A Command/Data Select, 0 = Command, 1 = Data ENET_CS_N, // DM9000A Chip Select ENET_WR_N, // DM9000A Write ENET_RD_N, // DM9000A Read ENET_RST_N, // DM9000A Reset ENET_INT, // DM9000A Interrupt ENET_CLK, // DM9000A Clock 25 MHz //////////////// Audio CODEC //////////////////////// AUD_ADCLRCK, // Audio CODEC ADC LR Clock AUD_ADCDAT, // Audio CODEC ADC Data AUD_DACLRCK, // Audio CODEC DAC LR Clock AUD_DACDAT, // Audio CODEC DAC Data AUD_BCLK, // Audio CODEC Bit-Stream Clock AUD_XCK, // Audio CODEC Chip Clock //////////////// TV Decoder //////////////////////// TD_DATA, // TV Decoder Data bus 8 bits TD_HS, // TV Decoder H_SYNC TD_VS, // TV Decoder V_SYNC TD_RESET, // TV Decoder Reset //////////////////// GPIO //////////////////////////// GPIO_0, // GPIO Connection 0 GPIO_1 // GPIO Connection 1 ); //////////////////////// Clock Input //////////////////////// input CLOCK_27; // 27 MHz input CLOCK_50; // 50 MHz input EXT_CLOCK; // External Clock //////////////////////// Push Button //////////////////////// input [3:0] KEY; // Pushbutton[3:0] //////////////////////// DPDT Switch //////////////////////// input [17:0] SW; // Toggle Switch[17:0] //////////////////////// 7-SEG Dispaly //////////////////////// output [6:0] HEX0; // Seven Segment Digit 0 output [6:0] HEX1; // Seven Segment Digit 1 output [6:0] HEX2; // Seven Segment Digit 2 output [6:0] HEX3; // Seven Segment Digit 3 output [6:0] HEX4; // Seven Segment Digit 4 output [6:0] HEX5; // Seven Segment Digit 5 output [6:0] HEX6; // Seven Segment Digit 6 output [6:0] HEX7; // Seven Segment Digit 7 //////////////////////////// LED //////////////////////////// output [8:0] LEDG; // LED Green[8:0] output [17:0] LEDR; // LED Red[17:0] //////////////////////////// UART //////////////////////////// output UART_TXD; // UART Transmitter input UART_RXD; // UART Receiver //////////////////////////// IRDA //////////////////////////// output IRDA_TXD; // IRDA Transmitter input IRDA_RXD; // IRDA Receiver /////////////////////// SDRAM Interface //////////////////////// inout [15:0] DRAM_DQ; // SDRAM Data bus 16 Bits output [11:0] DRAM_ADDR; // SDRAM Address bus 12 Bits output DRAM_LDQM; // SDRAM Low-byte Data Mask output DRAM_UDQM; // SDRAM High-byte Data Mask output DRAM_WE_N; // SDRAM Write Enable output DRAM_CAS_N; // SDRAM Column Address Strobe output DRAM_RAS_N; // SDRAM Row Address Strobe output DRAM_CS_N; // SDRAM Chip Select output DRAM_BA_0; // SDRAM Bank Address 0 output DRAM_BA_1; // SDRAM Bank Address 0 output DRAM_CLK; // SDRAM Clock output DRAM_CKE; // SDRAM Clock Enable //////////////////////// Flash Interface //////////////////////// inout [7:0] FL_DQ; // FLASH Data bus 8 Bits output [21:0] FL_ADDR; // FLASH Address bus 22 Bits output FL_WE_N; // FLASH Write Enable output FL_RST_N; // FLASH Reset output FL_OE_N; // FLASH Output Enable output FL_CE_N; // FLASH Chip Enable //////////////////////// SRAM Interface //////////////////////// inout [15:0] SRAM_DQ; // SRAM Data bus 16 Bits output [17:0] SRAM_ADDR; // SRAM Address bus 18 Bits output SRAM_UB_N; // SRAM High-byte Data Mask output SRAM_LB_N; // SRAM Low-byte Data Mask output SRAM_WE_N; // SRAM Write Enable output SRAM_CE_N; // SRAM Chip Enable output SRAM_OE_N; // SRAM Output Enable //////////////////// ISP1362 Interface //////////////////////// inout [15:0] OTG_DATA; // ISP1362 Data bus 16 Bits output [1:0] OTG_ADDR; // ISP1362 Address 2 Bits output OTG_CS_N; // ISP1362 Chip Select output OTG_RD_N; // ISP1362 Write output OTG_WR_N; // ISP1362 Read output OTG_RST_N; // ISP1362 Reset output OTG_FSPEED; // USB Full Speed, 0 = Enable, Z = Disable output OTG_LSPEED; // USB Low Speed, 0 = Enable, Z = Disable input OTG_INT0; // ISP1362 Interrupt 0 input OTG_INT1; // ISP1362 Interrupt 1 input OTG_DREQ0; // ISP1362 DMA Request 0 input OTG_DREQ1; // ISP1362 DMA Request 1 output OTG_DACK0_N; // ISP1362 DMA Acknowledge 0 output OTG_DACK1_N; // ISP1362 DMA Acknowledge 1 //////////////////// LCD Module 16X2 //////////////////////////// inout [7:0] LCD_DATA; // LCD Data bus 8 bits output LCD_ON; // LCD Power ON/OFF output LCD_BLON; // LCD Back Light ON/OFF output LCD_RW; // LCD Read/Write Select, 0 = Write, 1 = Read output LCD_EN; // LCD Enable output LCD_RS; // LCD Command/Data Select, 0 = Command, 1 = Data //////////////////// SD Card Interface //////////////////////// inout SD_DAT; // SD Card Data inout SD_DAT3; // SD Card Data 3 inout SD_CMD; // SD Card Command Signal output SD_CLK; // SD Card Clock //////////////////////// I2C //////////////////////////////// inout I2C_SDAT; // I2C Data output I2C_SCLK; // I2C Clock //////////////////////// PS2 //////////////////////////////// input PS2_DAT; // PS2 Data input PS2_CLK; // PS2 Clock //////////////////// USB JTAG link //////////////////////////// input TDI; // CPLD -> FPGA (data in) input TCK; // CPLD -> FPGA (clk) input TCS; // CPLD -> FPGA (CS) output TDO; // FPGA -> CPLD (data out) //////////////////////// VGA //////////////////////////// output VGA_CLK; // VGA Clock output VGA_HS; // VGA H_SYNC output VGA_VS; // VGA V_SYNC output VGA_BLANK; // VGA BLANK output VGA_SYNC; // VGA SYNC output [9:0] VGA_R; // VGA Red[9:0] output [9:0] VGA_G; // VGA Green[9:0] output [9:0] VGA_B; // VGA Blue[9:0] //////////////// Ethernet Interface //////////////////////////// inout [15:0] ENET_DATA; // DM9000A DATA bus 16Bits output ENET_CMD; // DM9000A Command/Data Select, 0 = Command, 1 = Data output ENET_CS_N; // DM9000A Chip Select output ENET_WR_N; // DM9000A Write output ENET_RD_N; // DM9000A Read output ENET_RST_N; // DM9000A Reset input ENET_INT; // DM9000A Interrupt output ENET_CLK; // DM9000A Clock 25 MHz //////////////////// Audio CODEC //////////////////////////// output AUD_ADCLRCK; // Audio CODEC ADC LR Clock input AUD_ADCDAT; // Audio CODEC ADC Data output AUD_DACLRCK; // Audio CODEC DAC LR Clock output AUD_DACDAT; // Audio CODEC DAC Data output AUD_BCLK; // Audio CODEC Bit-Stream Clock output AUD_XCK; // Audio CODEC Chip Clock //////////////////// TV Devoder //////////////////////////// input [7:0] TD_DATA; // TV Decoder Data bus 8 bits input TD_HS; // TV Decoder H_SYNC input TD_VS; // TV Decoder V_SYNC output TD_RESET; // TV Decoder Reset //////////////////////// GPIO //////////////////////////////// inout [35:0] GPIO_0; // GPIO Connection 0 inout [35:0] GPIO_1; // GPIO Connection 1 // LCD ON assign LCD_ON = 1'b0; assign LCD_BLON = 1'b0; // All inout port turn to tri-state assign DRAM_DQ = 16'hzzzz; assign FL_DQ = 8'hzz; assign SRAM_DQ = 16'hzzzz; assign OTG_DATA = 16'hzzzz; assign SD_DAT = 1'bz; assign ENET_DATA = 16'hzzzz; assign GPIO_0 = 36'hzzzzzzzzz; assign GPIO_1 = 36'hzzzzzzzzz; wire VGA_CTRL_CLK; wire AUD_CTRL_CLK; wire DLY_RST; assign TD_RESET = 1'b1; // Allow 27 MHz assign AUD_ADCLRCK = AUD_DACLRCK; assign AUD_XCK = AUD_CTRL_CLK; Reset_Delay r0 ( .iCLK(CLOCK_50),.oRESET(DLY_RST) ); VGA_Audio_PLL p1 ( .areset(~DLY_RST),.inclk0(CLOCK_27),.c0(VGA_CTRL_CLK),.c1(AUD_CTRL_CLK),.c2(VGA_CLK) ); I2C_AV_Config u3 ( // Host Side .iCLK(CLOCK_50), .iRST_N(KEY[0]), // I2C Side .I2C_SCLK(I2C_SCLK), .I2C_SDAT(I2C_SDAT) ); AUDIO_DAC_ADC u4 ( // Audio Side .oAUD_BCK(AUD_BCLK), .oAUD_DATA(AUD_DACDAT), .oAUD_LRCK(AUD_DACLRCK), .iAUD_ADCDAT(AUD_ADCDAT), .iAUD_extL(out[17:2]), .iAUD_extR(out[17:2]), // Control Signals //.iSrc_Select(SW[17]), .iCLK_18_4(AUD_CTRL_CLK), .iRST_N(DLY_RST) ); //define the length of the shiftregister // from the switches wire [11:0] note ; assign note = SW[11:0] ; //state machine start up wire reset; //pluck the string wire pluck ; reg last_pluck; reg [11:0] pluck_count; // state variable 0=reset, 1=readinput, // 2=readoutput, 3=writeinput, 4=write 5=updatepointers, // 9=stop reg [3:0] state ; reg last_clk ; //oneshot gen // constant for gain wire [17:0] gain ; //pointers into the shift register //4096 at 48kHz imples 12 Hz reg [11:0] ptr_in, ptr_out; //memory control reg we; //write enable--active high wire [17:0] sr_data; reg [17:0] write_data; reg [11:0] addr_reg; //data registers for arithmetic reg [17:0] out, in_data, out_data ; wire [17:0] new_out; //random number generator and lowpass filter wire x_low_bit ; // random number gen low-order bit reg [30:0] x_rand ;// rand number wire [17:0] new_lopass ; reg [17:0] lopass ; // reset control assign reset = ~KEY[0]; // pluck control assign pluck = ~KEY[3] ; //generate a random number at audio rate // --AUD_DACLRCK toggles once per left/right pair // --so it is the start signal for a random number update // --at audio sample rate //right-most bit for rand number shift regs assign x_low_bit = x_rand[27] ^ x_rand[30]; // newsample = (1-alpha)*oldsample + (random+/-1)*alpha // rearranging: // newsample = oldsample + ((random+/-1)-oldsample)*alpha // alpha is set from 1 to 1/128 using switches // alpha==1 means no lopass at all. 1/128 loses almost all the input bits assign new_lopass = lopass + ((( (x_low_bit)?18'h1_0000:18'h3_0000) - lopass)>>>SW[17:15]); //your basic XOR random # gen always @ (posedge AUD_DACLRCK) begin if (reset) begin x_rand <= 31'h55555555; lopass <= 18'h0 ; end else begin x_rand <= {x_rand[29:0], x_low_bit} ; lopass <= new_lopass ; end end //when user pushes a button transfer rand number to circular buffer //treat each bit of rand register as +/-1, 18-bit, 2'comp //when loading to circ buffer //shift buffer, apply filter, update indexes //once per audio clock tick assign LEDG = state; assign LEDR = ptr_out; assign gain = 18'h0_7EB8 ; //0.495 //Run the state machine FAST so that it completes in one //audio cycle always @ (posedge CLOCK_50) begin if (reset) begin ptr_out <= 12'h1 ; // beginning of shift register ptr_in <= 12'h0 ; we <= 1'h0 ; state <= 4'd9 ; //turn off the update state machine last_clk <= 1'h1; end else begin case (state) 1: begin // set up read ptr_out data addr_reg <= ptr_out; we <= 1'h0; state <= 4'd2; end 2: begin //get ptr_out data out_data <= sr_data; // set up read ptr_in data addr_reg <= ptr_in; we <= 1'h0; state <= 4'd3; end 3: begin //get prt_in data in_data <= sr_data; state <= 4'd4 ; end 4: begin //write ptr_in data: // -- can be either computed feedback, or noise from pluck out <= new_out; addr_reg <= ptr_in; we <= 1'h1 ; // feedback or new pluck if (pluck) begin // is this a new pluck? (part of the debouncer) if (last_pluck==0) begin // if so, reset the count pluck_count <= 12'd0; // and debounce pluck last_pluck <= 1'd1; end // have the correct number of random numbers been loaded? else if (pluck_count