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1 概述
该方案用于生成RGB信号，通过lvds接口驱动逻辑输出，点亮并驱动BP101WX-206液晶屏幕。
参考：下面为参考文章，内容非常详细。Xilinx LVDS Output——原语调用_vivado原语_ShareWow丶的博客
http://t.csdn.cn/Zy37p
2 功能描述
MMCM模块为时钟模块，负责将系统时钟变频与输出，产生各模块所需要的时钟；data_generator模块用于生成各种数据与信号，并传输给lvds_output_driver模块，lvds_output_driver模块将这些数据进行并串转换并按指定的lvds格式输出给液晶屏。
3 模块详细设计
MMCM模块用于时钟的变频与输出，data_generator模块用于生成8bit RGB数据，行场同步信号（h_sync、v_sync）和数据使能信号data_en，并传输给lvds_output_driver模块，该模块将这些数据进行并串转换并按指定格式输出给液晶屏。具体详细设计图如下：
3.1 MMCM模块
以下为时钟模块MMCM的接口示意图输出65Mhz和455Mhz的时钟，输出locked作为其他模块的复位信号，改模块采用IP核实现。
3.2 Data_generator模块设计
手册中给出的时序信息如下图：
依照这样的逻辑，画出大致的设计时序图：
3.3 lvds_output_driver模块设计
该模块的详细设计如下：
手册中的输出逻辑时序如下：
4 详细代码设计
4.1 data_generator模块详细设计
/* this module is used for data generationBP101WX1-2061280 * 800 pixel
*/
//count H_SYNC
always @(posedge i_clk_65mhz or posedge i_rst) beginif (i_rst) begincnt_h <= 0;endelse if (end_cnt_h) begincnt_h <= 0;endelse begincnt_h <= cnt_h + 1;end
end
assign end_cnt_h = cnt_h == (H_TOTAL - 1);//count V_SYNC
always @(posedge i_clk_65mhz or posedge i_rst) beginif (i_rst) begincnt_v <= 0;endelse if (end_cnt_h) beginif (end_cnt_v) begincnt_v <= 0;endelse begincnt_v <= cnt_v + 1;endend
end
assign end_cnt_v = end_cnt_h && (cnt_v == (V_TOTAL - 1));//OUTPUT h_sync v_sync DE
always @(posedge i_clk_65mhz or posedge i_rst) beginif (i_rst) begino_h_sync <= 1;endelse if ((cnt_h == H_FRONT - 1) || (cnt_h == H_FRONT + H_SYNC - 1)) begino_h_sync <= ~o_h_sync;end
endalways @(posedge i_clk_65mhz or posedge i_rst) beginif (i_rst) begino_v_sync <= 1;endelse if ((cnt_v == V_FRONT - 1 && end_cnt_h) || (cnt_v == V_FRONT + V_SYNC - 1 && end_cnt_h)) begino_v_sync <= ~o_v_sync;end
endalways @(posedge i_clk_65mhz or posedge i_rst) beginif (i_rst) begino_data_en <= 0;endelse if ((cnt_h == H_BLANK - 1 && cnt_v >= V_BLANK) || (cnt_h == H_TOTAL - 1 && cnt_v >= V_BLANK)) begino_data_en <= ~o_data_en;end
end//RGB data generation
assign x_cnt = (cnt_h >= H_BLANK)? cnt_h - (H_BLANK - 1) : 0;
assign y_cnt = (cnt_v >= V_BLANK)? cnt_v - (V_BLANK) : 0;
always @(posedge i_clk_65mhz or posedge i_rst) beginif (i_rst) beginrgb_data <= 0;end/* else if (x_cnt == h_vo || y_cnt == v_vo) beginrgb_data <= 24'hff_00_00;end */else if (x_cnt == 0 || x_cnt == 639 || x_cnt == 1279) beginrgb_data <= 24'hff_00_00;endelse if (y_cnt == 0 || y_cnt == 20 || y_cnt == 40) beginrgb_data <= 24'hff_00_00;endelse beginrgb_data <= 24'hffffff;end
end
assign {o_red_data, o_gre_data, o_blu_data} = rgb_data;
4.2 lvds_output_driver详细设计
第一种写法：
// CLK
OSERDESE2 #(.DATA_RATE_OQ ("SDR" ), // DDR, SDR.DATA_RATE_TQ ("SDR" ), // DDR, BUF, SDR.DATA_WIDTH (7 ), // Parallel data width (2-8,10,14).INIT_OQ (1'b0 ), // Initial value of OQ output (1'b0,1'b1).INIT_TQ (1'b0 ), // Initial value of TQ output (1'b0,1'b1).SERDES_MODE ("MASTER" ), // MASTER, SLAVE.SRVAL_OQ (1'b0 ), // OQ output value when SR is used (1'b0,1'b1).SRVAL_TQ (1'b0 ), // TQ output value when SR is used (1'b0,1'b1).TBYTE_CTL ("FALSE" ), // Enable tristate byte operation (FALSE, TRUE).TBYTE_SRC ("FALSE" ), // Tristate byte source (FALSE, TRUE).TRISTATE_WIDTH (1 ) // 3-state converter width (1,4))OSERDES_clk_inst (.OFB ( ), // 1-bit output: Feedback path for data.OQ (oserdes_clk ), // 1-bit output: Data path output// SHIFTOUT1 / SHIFTOUT2: 1-bit (each) output: Data output expansion (1-bit each).SHIFTOUT1 ( ),.SHIFTOUT2 ( ),.TBYTEOUT ( ), // 1-bit output: Byte group tristate.TFB ( ), // 1-bit output: 3-state control.TQ ( ), // 1-bit output: 3-state control.CLK (i_clk_455mhz ), // 1-bit input: High speed clock.CLKDIV (i_clk_65mhz ), // 1-bit input: Divided clock// D1 - D8: 1-bit (each) input: Parallel data inputs (1-bit each).D1 (CLK_PATTERN[0] ),.D2 (CLK_PATTERN[1] ),.D3 (CLK_PATTERN[2] ),.D4 (CLK_PATTERN[3] ),.D5 (CLK_PATTERN[4] ),.D6 (CLK_PATTERN[5] ),.D7 (CLK_PATTERN[6] ),.D8 ( ),.OCE (1'b1 ), // 1-bit input: Output data clock enable.RST (i_rst ), // 1-bit input: Reset// SHIFTIN1 / SHIFTIN2: 1-bit (each) input: Data input expansion (1-bit each).SHIFTIN1 (1'b0 ),.SHIFTIN2 (1'b0 ),// T1 - T4: 1-bit (each) input: Parallel 3-state inputs.T1 (1'b0 ),.T2 (1'b0 ),.T3 (1'b0 ),.T4 (1'b0 ),.TBYTEIN (1'b0 ), // 1-bit input: Byte group tristate.TCE (1'b0 ) // 1-bit input: 3-state clock enable);OBUFDS #(.IOSTANDARD ("DEFAULT" ), // Specify the output I/O standard.SLEW ("SLOW" ) // Specify the output slew rate) OBUFDS_CLK_inst (.O (tx_clk_p ), // Diff_p output (connect directly to top-level port).OB (tx_clk_n ), // Diff_n output (connect directly to top-level port).I (oserdes_clk ) // Buffer input );// 1 PAIR
OSERDESE2 #(.DATA_RATE_OQ ("SDR" ), // DDR, SDR.DATA_RATE_TQ ("SDR" ), // DDR, BUF, SDR.DATA_WIDTH (7 ), // Parallel data width (2-8,10,14).INIT_OQ (1'b0 ), // Initial value of OQ output (1'b0,1'b1).INIT_TQ (1'b0 ), // Initial value of TQ output (1'b0,1'b1).SERDES_MODE ("MASTER" ), // MASTER, SLAVE.SRVAL_OQ (1'b0 ), // OQ output value when SR is used (1'b0,1'b1).SRVAL_TQ (1'b0 ), // TQ output value when SR is used (1'b0,1'b1).TBYTE_CTL ("FALSE" ), // Enable tristate byte operation (FALSE, TRUE).TBYTE_SRC ("FALSE" ), // Tristate byte source (FALSE, TRUE).TRISTATE_WIDTH (1 ) // 3-state converter width (1,4))OSERDES_data_inst0 (.OFB ( ), // 1-bit output: Feedback path for data.OQ (oserdes_data[0]), // 1-bit output: Data path output// SHIFTOUT1 / SHIFTOUT2: 1-bit (each) output: Data output expansion (1-bit each).SHIFTOUT1 ( ),.SHIFTOUT2 ( ),.TBYTEOUT ( ), // 1-bit output: Byte group tristate.TFB ( ), // 1-bit output: 3-state control.TQ ( ), // 1-bit output: 3-state control.CLK (i_clk_455mhz ), // 1-bit input: High speed clock.CLKDIV (i_clk_65mhz ), // 1-bit input: Divided clock// D1 - D8: 1-bit (each) input: Parallel data inputs (1-bit each).D1 (i_gre_data[0] ),.D2 (i_red_data[5] ),.D3 (i_red_data[4] ),.D4 (i_red_data[3] ),.D5 (i_red_data[2] ),.D6 (i_red_data[1] ),.D7 (i_red_data[0] ),.D8 ( ),.OCE (1'b1 ), // 1-bit input: Output data clock enable.RST (i_rst ), // 1-bit input: Reset// SHIFTIN1 / SHIFTIN2: 1-bit (each) input: Data input expansion (1-bit each).SHIFTIN1 (1'b0 ),.SHIFTIN2 (1'b0 ),// T1 - T4: 1-bit (each) input: Parallel 3-state inputs.T1 (1'b0 ),.T2 (1'b0 ),.T3 (1'b0 ),.T4 (1'b0 ),.TBYTEIN (1'b0 ), // 1-bit input: Byte group tristate.TCE (1'b0 ) // 1-bit input: 3-state clock enable);OBUFDS #(.IOSTANDARD ("DEFAULT" ), // Specify the output I/O standard.SLEW ("SLOW" ) // Specify the output slew rate) OBUFDS_DATA_inst0 (.O (lvds_data_p[0] ), // Diff_p output (connect directly to top-level port).OB (lvds_data_n[0] ), // Diff_n output (connect directly to top-level port).I (oserdes_data[0]) // Buffer input );// 2 PAIR
OSERDESE2 #(.DATA_RATE_OQ ("SDR" ), // DDR, SDR.DATA_RATE_TQ ("SDR" ), // DDR, BUF, SDR.DATA_WIDTH (7 ), // Parallel data width (2-8,10,14).INIT_OQ (1'b0 ), // Initial value of OQ output (1'b0,1'b1).INIT_TQ (1'b0 ), // Initial value of TQ output (1'b0,1'b1).SERDES_MODE ("MASTER" ), // MASTER, SLAVE.SRVAL_OQ (1'b0 ), // OQ output value when SR is used (1'b0,1'b1).SRVAL_TQ (1'b0 ), // TQ output value when SR is used (1'b0,1'b1).TBYTE_CTL ("FALSE" ), // Enable tristate byte operation (FALSE, TRUE).TBYTE_SRC ("FALSE" ), // Tristate byte source (FALSE, TRUE).TRISTATE_WIDTH (1 ) // 3-state converter width (1,4))OSERDES_data_inst1 (.OFB ( ), // 1-bit output: Feedback path for data.OQ (oserdes_data[1]), // 1-bit output: Data path output// SHIFTOUT1 / SHIFTOUT2: 1-bit (each) output: Data output expansion (1-bit each).SHIFTOUT1 ( ),.SHIFTOUT2 ( ),.TBYTEOUT ( ), // 1-bit output: Byte group tristate.TFB ( ), // 1-bit output: 3-state control.TQ ( ), // 1-bit output: 3-state control.CLK (i_clk_455mhz ), // 1-bit input: High speed clock.CLKDIV (i_clk_65mhz ), // 1-bit input: Divided clock// D1 - D8: 1-bit (each) input: Parallel data inputs (1-bit each).D1 (i_blu_data[1] ),.D2 (i_blu_data[0] ),.D3 (i_gre_data[5] ),.D4 (i_gre_data[4] ),.D5 (i_gre_data[3] ),.D6 (i_gre_data[2] ),.D7 (i_gre_data[1] ),.D8 ( ),.OCE (1'b1 ), // 1-bit input: Output data clock enable.RST (i_rst ), // 1-bit input: Reset// SHIFTIN1 / SHIFTIN2: 1-bit (each) input: Data input expansion (1-bit each).SHIFTIN1 (1'b0 ),.SHIFTIN2 (1'b0 ),// T1 - T4: 1-bit (each) input: Parallel 3-state inputs.T1 (1'b0 ),.T2 (1'b0 ),.T3 (1'b0 ),.T4 (1'b0 ),.TBYTEIN (1'b0 ), // 1-bit input: Byte group tristate.TCE (1'b0 ) // 1-bit input: 3-state clock enable);OBUFDS #(.IOSTANDARD ("DEFAULT" ), // Specify the output I/O standard.SLEW ("SLOW" ) // Specify the output slew rate) OBUFDS_DATA_inst1 (.O (lvds_data_p[1] ), // Diff_p output (connect directly to top-level port).OB (lvds_data_n[1] ), // Diff_n output (connect directly to top-level port).I (oserdes_data[1]) // Buffer input );// 3 PAIR
OSERDESE2 #(.DATA_RATE_OQ ("SDR" ), // DDR, SDR.DATA_RATE_TQ ("SDR" ), // DDR, BUF, SDR.DATA_WIDTH (7 ), // Parallel data width (2-8,10,14).INIT_OQ (1'b0 ), // Initial value of OQ output (1'b0,1'b1).INIT_TQ (1'b0 ), // Initial value of TQ output (1'b0,1'b1).SERDES_MODE ("MASTER" ), // MASTER, SLAVE.SRVAL_OQ (1'b0 ), // OQ output value when SR is used (1'b0,1'b1).SRVAL_TQ (1'b0 ), // TQ output value when SR is used (1'b0,1'b1).TBYTE_CTL ("FALSE" ), // Enable tristate byte operation (FALSE, TRUE).TBYTE_SRC ("FALSE" ), // Tristate byte source (FALSE, TRUE).TRISTATE_WIDTH (1 ) // 3-state converter width (1,4))OSERDES_data_inst2 (.OFB ( ), // 1-bit output: Feedback path for data.OQ (oserdes_data[2]), // 1-bit output: Data path output// SHIFTOUT1 / SHIFTOUT2: 1-bit (each) output: Data output expansion (1-bit each).SHIFTOUT1 ( ),.SHIFTOUT2 ( ),.TBYTEOUT ( ), // 1-bit output: Byte group tristate.TFB ( ), // 1-bit output: 3-state control.TQ ( ), // 1-bit output: 3-state control.CLK (i_clk_455mhz ), // 1-bit input: High speed clock.CLKDIV (i_clk_65mhz ), // 1-bit input: Divided clock// D1 - D8: 1-bit (each) input: Parallel data inputs (1-bit each).D1 (i_data_en ),.D2 (i_v_sync ),.D3 (i_h_sync ),.D4 (i_blu_data[5] ),.D5 (i_blu_data[4] ),.D6 (i_blu_data[3] ),.D7 (i_blu_data[2] ),.D8 ( ),.OCE (1'b1 ), // 1-bit input: Output data clock enable.RST (i_rst ), // 1-bit input: Reset// SHIFTIN1 / SHIFTIN2: 1-bit (each) input: Data input expansion (1-bit each).SHIFTIN1 (1'b0 ),.SHIFTIN2 (1'b0 ),// T1 - T4: 1-bit (each) input: Parallel 3-state inputs.T1 (1'b0 ),.T2 (1'b0 ),.T3 (1'b0 ),.T4 (1'b0 ),.TBYTEIN (1'b0 ), // 1-bit input: Byte group tristate.TCE (1'b0 ) // 1-bit input: 3-state clock enable);OBUFDS #(.IOSTANDARD ("DEFAULT" ), // Specify the output I/O standard.SLEW ("SLOW" ) // Specify the output slew rate) OBUFDS_DATA_inst2 (.O (lvds_data_p[2] ), // Diff_p output (connect directly to top-level port).OB (lvds_data_n[2] ), // Diff_n output (connect directly to top-level port).I (oserdes_data[2]) // Buffer input );// 4 PAIR
OSERDESE2 #(.DATA_RATE_OQ ("SDR" ), // DDR, SDR.DATA_RATE_TQ ("SDR" ), // DDR, BUF, SDR.DATA_WIDTH (7 ), // Parallel data width (2-8,10,14).INIT_OQ (1'b0 ), // Initial value of OQ output (1'b0,1'b1).INIT_TQ (1'b0 ), // Initial value of TQ output (1'b0,1'b1).SERDES_MODE ("MASTER" ), // MASTER, SLAVE.SRVAL_OQ (1'b0 ), // OQ output value when SR is used (1'b0,1'b1).SRVAL_TQ (1'b0 ), // TQ output value when SR is used (1'b0,1'b1).TBYTE_CTL ("FALSE" ), // Enable tristate byte operation (FALSE, TRUE).TBYTE_SRC ("FALSE" ), // Tristate byte source (FALSE, TRUE).TRISTATE_WIDTH (1 ) // 3-state converter width (1,4))OSERDES_data_inst3 (.OFB ( ), // 1-bit output: Feedback path for data.OQ (oserdes_data[3]), // 1-bit output: Data path output// SHIFTOUT1 / SHIFTOUT2: 1-bit (each) output: Data output expansion (1-bit each).SHIFTOUT1 ( ),.SHIFTOUT2 ( ),.TBYTEOUT ( ), // 1-bit output: Byte group tristate.TFB ( ), // 1-bit output: 3-state control.TQ ( ), // 1-bit output: 3-state control.CLK (i_clk_455mhz ), // 1-bit input: High speed clock.CLKDIV (i_clk_65mhz ), // 1-bit input: Divided clock// D1 - D8: 1-bit (each) input: Parallel data inputs (1-bit each).D1 (DON_CR ),.D2 (i_blu_data[7] ),.D3 (i_blu_data[6] ),.D4 (i_gre_data[7] ),.D5 (i_gre_data[6] ),.D6 (i_red_data[7] ),.D7 (i_red_data[6] ),.D8 ( ),.OCE (1'b1 ), // 1-bit input: Output data clock enable.RST (i_rst ), // 1-bit input: Reset// SHIFTIN1 / SHIFTIN2: 1-bit (each) input: Data input expansion (1-bit each).SHIFTIN1 (1'b0 ),.SHIFTIN2 (1'b0 ),// T1 - T4: 1-bit (each) input: Parallel 3-state inputs.T1 (1'b0 ),.T2 (1'b0 ),.T3 (1'b0 ),.T4 (1'b0 ),.TBYTEIN (1'b0 ), // 1-bit input: Byte group tristate.TCE (1'b0 ) // 1-bit input: 3-state clock enable);OBUFDS #(.IOSTANDARD ("DEFAULT" ), // Specify the output I/O standard.SLEW ("SLOW" ) // Specify the output slew rate) OBUFDS_DATA_inst3 (.O (lvds_data_p[3] ), // Diff_p output (connect directly to top-level port).OB (lvds_data_n[3] ), // Diff_n output (connect directly to top-level port).I (oserdes_data[3]) // Buffer input );
第二种写法，采用generate语句：
parameter DON_CR = 0;
parameter CLK_PATTERN = 7'b11_000_11;wire [23:0] din;wire oserdes_clk ; // oserdes output clk
wire [3:0] oserdes_data; // oserdes output datagenvar i;assign din = { DON_CR, i_blu_data[7:6], i_gre_data[7:6], i_red_data[7:6], i_data_en, i_v_sync ,i_h_sync, i_blu_data[5:2], i_blu_data[1:0], i_gre_data[5:1],i_gre_data[0], i_red_data[5:0]};// CLK
OSERDESE2 #(.DATA_RATE_OQ ("SDR" ), // DDR, SDR.DATA_RATE_TQ ("SDR" ), // DDR, BUF, SDR.DATA_WIDTH (7 ), // Parallel data width (2-8,10,14).INIT_OQ (1'b0 ), // Initial value of OQ output (1'b0,1'b1).INIT_TQ (1'b0 ), // Initial value of TQ output (1'b0,1'b1).SERDES_MODE ("MASTER" ), // MASTER, SLAVE.SRVAL_OQ (1'b0 ), // OQ output value when SR is used (1'b0,1'b1).SRVAL_TQ (1'b0 ), // TQ output value when SR is used (1'b0,1'b1).TBYTE_CTL ("FALSE" ), // Enable tristate byte operation (FALSE, TRUE).TBYTE_SRC ("FALSE" ), // Tristate byte source (FALSE, TRUE).TRISTATE_WIDTH (1 ) // 3-state converter width (1,4))OSERDES_clk_inst (.OFB ( ), // 1-bit output: Feedback path for data.OQ (oserdes_clk ), // 1-bit output: Data path output// SHIFTOUT1 / SHIFTOUT2: 1-bit (each) output: Data output expansion (1-bit each).SHIFTOUT1 ( ),.SHIFTOUT2 ( ),.TBYTEOUT ( ), // 1-bit output: Byte group tristate.TFB ( ), // 1-bit output: 3-state control.TQ ( ), // 1-bit output: 3-state control.CLK (i_clk_455mhz ), // 1-bit input: High speed clock.CLKDIV (i_clk_65mhz ), // 1-bit input: Divided clock// D1 - D8: 1-bit (each) input: Parallel data inputs (1-bit each).D1 (CLK_PATTERN[0] ),.D2 (CLK_PATTERN[1] ),.D3 (CLK_PATTERN[2] ),.D4 (CLK_PATTERN[3] ),.D5 (CLK_PATTERN[4] ),.D6 (CLK_PATTERN[5] ),.D7 (CLK_PATTERN[6] ),.D8 ( ),.OCE (1'b1 ), // 1-bit input: Output data clock enable.RST (i_rst ), // 1-bit input: Reset// SHIFTIN1 / SHIFTIN2: 1-bit (each) input: Data input expansion (1-bit each).SHIFTIN1 (1'b0 ),.SHIFTIN2 (1'b0 ),// T1 - T4: 1-bit (each) input: Parallel 3-state inputs.T1 (1'b0 ),.T2 (1'b0 ),.T3 (1'b0 ),.T4 (1'b0 ),.TBYTEIN (1'b0 ), // 1-bit input: Byte group tristate.TCE (1'b0 ) // 1-bit input: 3-state clock enable);OBUFDS #(.IOSTANDARD ("DEFAULT" ), // Specify the output I/O standard.SLEW ("SLOW" ) // Specify the output slew rate) OBUFDS_CLK_inst (.O (o_tx_clk_p ), // Diff_p output (connect directly to top-level port).OB (o_tx_clk_n ), // Diff_n output (connect directly to top-level port).I (oserdes_clk ) // Buffer input );// DATA
generatefor (i = 0; i<4; i=i+1) beginOSERDESE2 #(.DATA_RATE_OQ ("SDR" ), // DDR, SDR.DATA_RATE_TQ ("SDR" ), // DDR, BUF, SDR.DATA_WIDTH (7 ), // Parallel data width (2-8,10,14).INIT_OQ (1'b0 ), // Initial value of OQ output (1'b0,1'b1).INIT_TQ (1'b0 ), // Initial value of TQ output (1'b0,1'b1).SERDES_MODE ("MASTER" ), // MASTER, SLAVE.SRVAL_OQ (1'b0 ), // OQ output value when SR is used (1'b0,1'b1).SRVAL_TQ (1'b0 ), // TQ output value when SR is used (1'b0,1'b1).TBYTE_CTL ("FALSE" ), // Enable tristate byte operation (FALSE, TRUE).TBYTE_SRC ("FALSE" ), // Tristate byte source (FALSE, TRUE).TRISTATE_WIDTH (1 ) // 3-state converter width (1,4))OSERDES_data_inst0 (.OFB ( ), // 1-bit output: Feedback path for data.OQ (oserdes_data[i]), // 1-bit output: Data path output// SHIFTOUT1 / SHIFTOUT2: 1-bit (each) output: Data output expansion (1-bit each).SHIFTOUT1 ( ),.SHIFTOUT2 ( ),.TBYTEOUT ( ), // 1-bit output: Byte group tristate.TFB ( ), // 1-bit output: 3-state control.TQ ( ), // 1-bit output: 3-state control.CLK (i_clk_455mhz ), // 1-bit input: High speed clock.CLKDIV (i_clk_65mhz ), // 1-bit input: Divided clock// D1 - D8: 1-bit (each) input: Parallel data inputs (1-bit each).D1 (i_gre_data[i*8+6]),.D2 (i_red_data[i*8+5]),.D3 (i_red_data[i*8+4]),.D4 (i_red_data[i*8+3]),.D5 (i_red_data[i*8+2]),.D6 (i_red_data[i*8+1]),.D7 (i_red_data[i*8+0]),.D8 ( ),.OCE (1'b1 ), // 1-bit input: Output data clock enable.RST (i_rst ), // 1-bit input: Reset// SHIFTIN1 / SHIFTIN2: 1-bit (each) input: Data input expansion (1-bit each).SHIFTIN1 (1'b0 ),.SHIFTIN2 (1'b0 ),// T1 - T4: 1-bit (each) input: Parallel 3-state inputs.T1 (1'b0 ),.T2 (1'b0 ),.T3 (1'b0 ),.T4 (1'b0 ),.TBYTEIN (1'b0 ), // 1-bit input: Byte group tristate.TCE (1'b0 ) // 1-bit input: 3-state clock enable);OBUFDS #(.IOSTANDARD ("DEFAULT" ), // Specify the output I/O standard.SLEW ("SLOW" ) // Specify the output slew rate) OBUFDS_DATA_inst0 (.O (o_lvds_data_p[i]), // Diff_p output (connect directly to top-level port).OB (o_lvds_data_n[i]), // Diff_n output (connect directly to top-level port).I (oserdes_data[i] ) // Buffer input );end
endgenerate
4.3 顶层设计
module a_top (input clk , // sys_clkoutput pwm_pannel , // backlightoutput o_tx_clk_p ,output o_tx_clk_n ,output [3:0] lvds_data_p ,output [3:0] lvds_data_n
);wire clk_65mhz ;
wire clk_455mhz ;wire rst ;wire [7:0] red_data ;
wire [7:0] gre_data ;
wire [7:0] blu_data ;
wire h_sync ;
wire v_sync ;
wire data_en ; assign pwm_pannel = 1;// MMCM
clk_wiz_0 u_clk_wiz_0(/* output */ .clk_out1 (clk_65mhz ),/* output */ .clk_out2 (clk_455mhz ),/* output */ .locked (rst ),/* input */ .clk_in1 (clk )
);data_generator u_data_generator(/* input */ .i_clk_65mhz (clk_65mhz ), //input 65MHz clk, period : 15.38ns/* input */ .i_rst (!rst ),/* output [7:0] */ .o_red_data (red_data ),/* output [7:0] */ .o_gre_data (gre_data ),/* output [7:0] */ .o_blu_data (blu_data ),/* output reg */ .o_h_sync (h_sync ),/* output reg */ .o_v_sync (v_sync ),/* output reg */ .o_data_en (data_en )
);lvds_output_driver u_lvds_output_driver(/* input */ .i_clk_455mhz (clk_455mhz ),/* input */ .i_clk_65mhz (clk_65mhz ),/* input */ .i_rst (!rst ),/* input [7:0] */ .i_red_data (red_data ),/* input [7:0] */ .i_gre_data (gre_data ),/* input [7:0] */ .i_blu_data (blu_data ),/* input */ .i_v_sync (v_sync ),/* input */ .i_h_sync (h_sync ),/* input */ .i_data_en (data_en ),/* output */ .tx_clk_p (o_tx_clk_p ),/* output */ .tx_clk_n (o_tx_clk_n ),/* output [3:0] */ .lvds_data_p (lvds_data_p),/* output [3:0] */ .lvds_data_n (lvds_data_n)
);endmodule //a_top5 实现效果
