一步一步学CPLD+SRAM驱动tft4.3寸液晶屏（连载。。。。） (amobbs.com 阿莫电子技术论坛) -

jobwork 发表于 2011-10-15 10:22:02

一步一步学CPLD+SRAM驱动tft4.3寸液晶屏（连载。。。。）

学习cpld也有相当一段时间了，一直没有实战应用，借着要给单位做个测试板的机会，玩玩cpld驱动TFT.
现在市面上的tft4.3寸液晶屏满天飞，价格很便宜可能是MP5畅销的缘故吧

硬件支持背光，触摸屏， flashAT45db161d， sd卡。
不费话了先上原理图
tft43原理图ourdev_685080WXAWB7.pdf(文件大小:498K) (原文件名:TFT43_DRI.pdf)
电路板昨天收到了已焊接成品
http://cache.amobbs.com/bbs_upload782111/files_46/ourdev_685088C047ZM.jpg
(原文件名:IMAG0028.jpg)

http://cache.amobbs.com/bbs_upload782111/files_46/ourdev_685089QURQZJ.jpg
(原文件名:IMAG0029.jpg)

http://cache.amobbs.com/bbs_upload782111/files_46/ourdev_685090IS7LBI.jpg
(原文件名:IMAG0031.jpg)

http://cache.amobbs.com/bbs_upload782111/files_46/ourdev_685091XNZIJF.jpg
(原文件名:IMAG0032.jpg)

jobwork 发表于 2011-10-15 10:28:24

通用的4.3寸TFT时序图
http://cache.amobbs.com/bbs_upload782111/files_46/ourdev_685094QXBEGB.jpg
(原文件名:时序.jpg)
逻辑代码正在编写中。。。。。。。待续

liulingo 发表于 2011-10-15 10:30:30

果断的插入

yisea123 发表于 2011-10-15 10:31:49

mark,速度续

jobwork 发表于 2011-10-15 10:59:08

时钟分配
采用widesoft1 大侠的http://www.ourdev.cn/bbs/bbs_content.jsp?bbs_sn=4534978&bbs_page_no=1&search_mode=1&search_text=tft&bbs_id=1029
vhdl编写
STAUSCNT最高位STAUSCNT（2）是送往TFT43的9M时钟
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;

entity pll4f is
   port (
            signal CLK : IN STD_LOGIC;
         signal STAUSCNT : BUFFER STD_LOGIC_VECTOR (2 DOWNTO 0)
         );
end entity pll4f;
architecture pll4 of pll4f is


begin

process (CLK)
begin
IFCLK' EVENT AND CLK='1' THEN
      IF STAUSCNT="110" THEN
      STAUSCNT<="001";
ELSE
            STAUSCNT<=STAUSCNT+1;
END IF;
END IF;
end process;
end pll4;

TFT43时序
DCK连接时钟STAUSCNT（2）
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;

entity TFT43OUT is
   port (

            signal DCK : IN STD_LOGIC;
            signal InData : IN STD_LOGIC_VECTOR (15 DOWNTO 0);
   signal R_Data : out STD_LOGIC_VECTOR (4 DOWNTO 0);
   signal G_Data : out STD_LOGIC_VECTOR (5 DOWNTO 0);
   signal B_Data : out STD_LOGIC_VECTOR (4 DOWNTO 0);
   --signal Adr : IN STD_LOGIC_VECTOR (17 DOWNTO 0);
   signal DEN : buffer STD_LOGIC;
   signal Adr : out STD_LOGIC_VECTOR (16 DOWNTO 0);
   signal HS,VS,DCK1 : out STD_LOGIC;
   signal LEDP : buffer STD_LOGIC_VECTOR (5 DOWNTO 0)
         );
end entity TFT43OUT;

architecture TFTOUT of TFT43OUT is
   signal ADr_out:STD_LOGIC_VECTOR (16 DOWNTO 0);
begin
---------------------------------------------------------------------------
Adr<=ADr_out;
DCK1<=DCK;

---------------------------------------------------------------------------
process (DCK,ADr_out)
variable Hreg_Q : STD_LOGIC_VECTOR (9 DOWNTO 0);
variable Vreg_Q :    STD_LOGIC_VECTOR (8 DOWNTO 0);
begin
IFDCK' EVENT AND DCK='1' THEN
      IF(Hreg_Q<"1000010100") then -----------531
            Hreg_Q:=Hreg_Q+1;
ELSE Hreg_Q:="0000000000";
      LEDP<=LEDP+1;
      IF Vreg_Q<"100011111"THEN --287
            Vreg_Q:=Vreg_Q+1;
ELSE Vreg_Q:="000000000";
END IF;
END IF;
IFHreg_Q<"11" THEN --2
         HS<='0';
      else
      HS<='1';
      END IF;
      IFVreg_Q <"100" THEN ---2
         VS<='0';
      ELSE VS<='1';
      END IF;
   IF Vreg_Q>"1100" AND Vreg_Q<"100011101"THEN          --V13--284
         IF Hreg_Q>"101010" ANDHreg_Q<"1000001011" THEN       --H43-522
                  DEN<='1';
               ADr_out<=ADr_out+1;
         ELSE DEN<='0';
         END IF;
      ELSEADr_out<="00000000000000000";
END IF;
END IF;
end process;

process (DEN,InData)
begin
if DEN='1' then --可改变不同的颜色
      R_Data<="00000";
      G_Data<="000000";
      B_Data<="11111";
else
   R_Data<="00000";
   G_Data<="000000";
   B_Data<="00000";
end if;
end process;
end TFTOUT;

经过上面的代码可显示
http://cache.amobbs.com/bbs_upload782111/files_46/ourdev_685106OAQ0S1.jpg
(原文件名:IMAG0037.jpg)

http://cache.amobbs.com/bbs_upload782111/files_46/ourdev_685107YWAAHB.jpg
(原文件名:IMAG0038.jpg)

yuyu87 发表于 2011-10-15 12:13:56

我想问下，MAX II，就那么大点资源，驱动完TFT后还能做什么？我最近也在学习，但总感觉EMP240资源好少，写个动态驱动数码管的就占了1/3的资源，郁闷~

jobwork 发表于 2011-10-15 12:24:12

回复【5楼】yuyu87 雨
我想问下，max ii，就那么大点资源，驱动完tft后还能做什么？我最近也在学习，但总感觉emp240资源好少，写个动态驱动数码管的就占了1/3的资源，郁闷~
-----------------------------------------------------------------------

基本就完了，就连io都完了

Medii 发表于 2011-10-15 13:07:24

SD卡和FLASH做什么的呀？只是IO引出来？

kingwaykingway 发表于 2011-10-15 14:05:58

不错。。mark

huzcmail 发表于 2011-10-15 15:21:25

mark一下

ndt2000 发表于 2011-10-15 22:22:33

mark

gaoyu 发表于 2011-10-15 22:28:27

问一下用FPGA中的程序在断电后会消失吗是sof格式的初学者多多指教哈

niba 发表于 2011-10-15 22:49:39

强力围观中.........

niba 发表于 2011-10-15 22:59:23

这一块的成本多少呀？楼主核算下没，能到150以内吗？

eworker 发表于 2011-10-15 23:11:18

hao

kingwaykingway 发表于 2011-10-15 23:40:58

回复【12楼】niba
-----------------------------------------------------------------------

用我的屏和触摸屏的话，可以控制到很低成本

niba 发表于 2011-10-16 01:54:41

核算下
屏 -------70
EPM240 ---15
SRAM -----15
PCB-----15
其他IC ---30
杂项 -----5

总硬件成本150 ，大家也合算下看看

jobwork 发表于 2011-10-16 08:38:20

呵呵，楼上很会算哦，不过我初学者玩意，昨天调试未完成，8088总线写入雪花点，进一步试验中

Feeling_MCU 发表于 2011-10-16 09:34:10

最好整下SDRAM啊

jobwork 发表于 2011-10-17 18:48:01

11.17还是那样没进展，进一步试验

freefei 发表于 2011-10-19 15:35:49

正在学习这个，不错

xibu1102007 发表于 2011-10-20 17:12:58

楼主也是西安的？

myfriend6042 发表于 2011-10-20 22:43:01

mark

jobwork 发表于 2011-10-21 18:06:57

回复【21楼】xibu1102007
楼主也是西安的？
-----------------------------------------------------------------------

近年，单位大搬家，咸阳

110112110 发表于 2011-10-24 18:03:53

mark

gc56198 发表于 2011-10-24 18:43:48

EPM240资源够不够？。。。。。。够呛吧。。

tanybin 发表于 2011-10-24 20:44:25

这个以前坛子里面有人弄过的吧，可以找找看。

jobwork 发表于 2011-10-27 12:11:19

用了本论坛网友通关的代码显示出来了，呵呵做了个简单的界面
http://cache.amobbs.com/bbs_upload782111/files_47/ourdev_689128SOA253.jpg
(原文件名:IMAG0039.jpg)

http://cache.amobbs.com/bbs_upload782111/files_47/ourdev_689129P7MZB7.jpg
(原文件名:IMAG0040.jpg)

http://cache.amobbs.com/bbs_upload782111/files_47/ourdev_689130GR7Z4U.jpg
(原文件名:IMAG0041.jpg)

相关视频
点击此处下载 ourdev_689131EQ49YV.rar(文件大小:1.69M) (原文件名:VIDEO0003.rar)

jobwork 发表于 2011-10-27 12:17:21

这是全部代码，DE驱动，HSync 固定低电平
感谢widesoft2 通关的代码原帖
http://www.ourdev.cn/bbs/bbs_content.jsp?bbs_sn=4799753&bbs_page_no=1&search_mode=3&search_text=widesoft2&bbs_id=1029

/*
接口说明:
Clk54:系统晶振,选择54M晶振
SysRst:系统复位线.
ExDataBus:外部16位数据总线
ExCs:控制器片选,
ExRs:数据批令选择
ExWr:写信号
ExRd:读信号
RamAddrBus:显存地址线.
RamDataBus:显存数据总线
RamCs:显存片选
RamWe:显存写选通.
LedOn:背光控制PWM
DE:TFT屏
DE:VSyncTFT屏,
HSync:TFT屏
RGB:TFT屏
Pclk:TFT屏);
*/

module Tft_dri43(Clk54, SysRst, ExDataBus, ExCs, ExRs, ExWr, ExRd, RamAddrBus,
         RamDataBus, RamCs, RamWe, LedOn, DE, VSync, HSync, RGB, Pclk, RamOe);
input Clk54, SysRst, ExCs, ExRs, ExRd, ExWr;
inout ExDataBus;
inout RamDataBus;
output RamAddrBus;
output RGB;
output RamCs, RamWe, LedOn, DE, VSync, HSync, Pclk,RamOe;

reg ClkCnt_Q3;
reg DotClkEn_Q;
reg Pclk_Q;
reg WrEn_Q;
reg ExBusOut_Q;
reg ExOutM;
reg WriteRgb_Q;
reg ExWrClk_Q;
reg ExRsR_Q;
reg ExCsR_Q;
reg ExRdClk_Q;
reg ExRdClk_Q1;
reg ExRdClk_Q2;
reg ExRdClk_Q3;
reg ExWrClk_Q1;
reg ExWrClk_Q2;
reg ExWrClk_Q3;

reg SramAddr;
reg PrePareData;
reg IndexData;
reg InRamWe;
reg IncAddr;
reg XRegOver;
reg YRegOver;
reg AskWr;

reg RGB_Q;
reg InBusOut_Q;
reg XRegValue_Q;
reg YRegValue_Q;
reg SysCmdValue_Q;
reg RegAddr_Q;
reg RamWeReg_Q;
reg RamTriState_Q;
reg FillCount_Q;
reg BRGBValue_Q;
reg FRGBValue_Q;
reg RamAddrBus_Q;
reg FillHead_Q;
reg HsCount_Q;
reg DotCount_Q;
reg SelDispRam_Q;
reg RamCsReg_Q;
reg DsMark;
reg HsMark;
reg DsState_Q;
reg HsState_Q;
reg DE_Q;
reg LedCount_Q;
reg LedOn_Q,LedOn_W;

assign Pclk = Pclk_Q;
assign RGB = RGB_Q;
assign RamAddrBus = RamAddrBus_Q;
assign RamWe = RamWeReg_Q;
assign RamCs = RamCsReg_Q;
assign RamDataBus = (RamTriState_Q | Clk54)?16'bzzzzzzzzzzzzzzzz:InBusOut_Q;
assign VSync = DE_Q;
assign HSync = 1'b0;
assign DE = DE_Q;
assign LedOn = LedOn_Q;//1'b1;
assign ExDataBus = ExOutM;
assign RamOe=1'b0;
/*
--1.将54M主时钟6分频,产生9M时钟并输出至引脚Pclk
--2.输出DotClkEn为9M信号同步其他进程.高电平为1个主时钟周期,低电平5个主时钟周期
--3.技巧: 001,010,011,100,101,110.共6个状态,高位刚好是6分频等宽.
*/
always @(posedge Clk54 or negedge SysRst)
begin
   if (!SysRst) begin
         ClkCnt_Q3 = 3'd1;
         Pclk_Q    = 1'b0;
         DotClkEn_Q= 1'b0;
   end else begin
         if (ClkCnt_Q3 & ClkCnt_Q3) begin
            ClkCnt_Q3 <= 3'd1;
         end else begin
            ClkCnt_Q3 <= ClkCnt_Q3 + 3'd1;
         end
         Pclk_Q <= (SysCmdValue_Q)?1'b0:ClkCnt_Q3;
         DotClkEn_Q <= ((~ClkCnt_Q3) & ClkCnt_Q3 & ClkCnt_Q3);
   end
end
/*
--外部接口在RD及CS低电平期间输出内部数据
--RS为0时输出忙信号.RS为1时输出当前地址的内部数据
*/
always @(SysRst or ExBusOut_Q or WrEn_Q or ExCs or ExRs or ExWr or ExRd)
begin
   if (!SysRst) begin
         ExOutM = 16'bzzzzzzzzzzzzzzzz;
   end else begin
         if ((~ExCs) & ExWr & (~ExRd)) begin
            ExOutM = (ExRs)?ExBusOut_Q:({15'd0,WrEn_Q});
         end else begin
            ExOutM = 16'bzzzzzzzzzzzzzzzz;
         end
   end
end
/*
--外部异步WR写入数据.
*/
always @(posedge ExWr or negedge SysRst)
begin
   if (!SysRst) begin
         WriteRgb_Q = 16'd0;
         ExWrClk_Q= 1'b0;
         RegAddr_Q= 3'd0;
      end else begin
         if (!ExCs) begin
            if (!ExRs) begin
               RegAddr_Q <= ExDataBus;
            end else begin
               WriteRgb_Q <= ExDataBus;
               ExWrClk_Q <= ~ExWrClk_Q;
            end
         end
   end
end
/*
--外部异步RD读出数据.
*/
always @(negedge ExRd or negedge SysRst)
begin
   if (!SysRst) begin
         ExRsR_Q = 1'b0;
         ExCsR_Q = 1'b1;
      end else begin
         ExCsR_Q <= ExCs;
         ExRsR_Q <= ExRs;
   end
end

always @(posedge ExRd or negedge SysRst)
begin
   if (!SysRst) begin
         ExRdClk_Q = 1'b0;
      end else begin
         if((~ExCsR_Q) & ExRsR_Q) begin
            ExRdClk_Q <= ~ExRdClk_Q;
         end
   end
end
/*
--主时钟打两拍同步采用外部读写信号
*/
always @(posedge Clk54 or negedge SysRst)
begin
   if (!SysRst) begin
         ExRdClk_Q1 = 1'b0;
         ExRdClk_Q2 = 1'b0;
         ExRdClk_Q3 = 1'b0;
         ExWrClk_Q1 = 1'b0;
         ExWrClk_Q2 = 1'b0;
         ExWrClk_Q3 = 1'b0;
   end else begin
         ExRdClk_Q1 <= ExRdClk_Q;
         ExRdClk_Q2 <= ExRdClk_Q1;
         ExRdClk_Q3 <= ExRdClk_Q2;
         ExWrClk_Q1 <= ExWrClk_Q;
         ExWrClk_Q2 <= ExWrClk_Q1;
         ExWrClk_Q3 <= ExWrClk_Q2;
   end
end

always @(posedge Clk54 or negedge SysRst)
begin
   if (!SysRst) begin
         InBusOut_Q= 16'd0;
         ExBusOut_Q= 16'd0;
         XRegValue_Q = 9'd0;
         YRegValue_Q = 9'd0;
         SysCmdValue_Q = 16'b0110000000000000;
         WrEn_Q = 1'b0;
         RamWeReg_Q = 1'b1;
         RamTriState_Q = 1'b1;
         RGB_Q = 16'd0;
         FillCount_Q = 3'd7;
         BRGBValue_Q= 16'd0;
         FRGBValue_Q= 16'd0;
         RamAddrBus_Q = 18'd0;
         RamCsReg_Q = 1'b1;
         PrePareData = 16'd0;
   end else begin
         if ((( ExRdClk_Q3) & (~ExRdClk_Q2) & (~ExRdClk_Q1)) |
            ((~ExRdClk_Q3) & ( ExRdClk_Q2) & ( ExRdClk_Q1))) begin
            IncAddr = 1'b1;
         end else begin
            IncAddr = 1'b0;
         end

         if ((( ExWrClk_Q3) & (~ExWrClk_Q2) & (~ExWrClk_Q1)) |
            ((~ExWrClk_Q3) & (ExWrClk_Q2) & ( ExWrClk_Q1))) begin
            AskWr = 1'b1;
         end else begin
            AskWr = WrEn_Q;
         end
         XRegOver = (XRegValue_Q == 9'b111011111)?1'b1:1'b0;
         YRegOver = (YRegValue_Q == 9'b100001111)?1'b1:1'b0;
         PrePareData = WriteRgb_Q;
         IndexData = WriteRgb_Q;
         InRamWe = 1'b1;
         if (!ClkCnt_Q3) begin
            if (AskWr) begin
               case (RegAddr_Q)
               3'b000:begin
                        XRegValue_Q <= PrePareData;
                        WrEn_Q <= 1'b0;
                     end
               3'b001:begin
                        YRegValue_Q <= PrePareData;
                        WrEn_Q <= 1'b0;
                     end
               3'b100:begin
                        FRGBValue_Q <= PrePareData;
                        WrEn_Q <= 1'b0;
                     end
               3'b101:begin
                        BRGBValue_Q <= PrePareData;
                        WrEn_Q <= 1'b0;
                     end
               3'b110:begin
                        SysCmdValue_Q <= PrePareData;
                        WrEn_Q <= 1'b0;
                     end
               3'b010:begin
                        InRamWe = 1'b0;
                        IncAddr = 1'b1;
                        WrEn_Q <= 1'b0;
                     end
               3'b011:begin
                        if (!IndexData) begin
                           PrePareData = BRGBValue_Q;
                           InRamWe = SysCmdValue_Q;
                        end else begin
                           PrePareData = FRGBValue_Q;
                           InRamWe = 1'b0;
                        end
                        IncAddr = 1'b1;
                        WrEn_Q <= (FillCount_Q | FillCount_Q | FillCount_Q);
                        FillCount_Q <= FillCount_Q + 3'd7;
                     end
               3'b111:begin
                        if (FillHead_Q) begin
                           IncAddr = 1'b1;
                           InRamWe = 1'b0;
                           if (YRegOver & XRegOver) begin
                                 WrEn_Q <= 1'b0;
                           end
                        end else begin
                           WrEn_Q <= 1'b1;
                        end
                     end
               endcase
            end
            RGB_Q <= (SysCmdValue_Q)?16'd0:RamDataBus;
            SramAddr = YRegValue_Q;
            SramAddr = XRegValue_Q;
            RamAddrBus_Q <= XRegValue_Q;
            RamAddrBus_Q <= SysCmdValue_Q;
         end else begin
            if (AskWr) begin
               WrEn_Q <= 1'b1;
            end
            ExBusOut_Q <= RamDataBus;
            SramAddr = HsCount_Q;
            SramAddr = DotCount_Q;
            RamAddrBus_Q <= DotCount_Q;
            RamAddrBus_Q <= SelDispRam_Q;
         end
         InBusOut_Q <= PrePareData;
         RamTriState_Q <= InRamWe;
         RamWeReg_Q <= InRamWe;
         SramAddr = SramAddr - {4'd0,SramAddr};
         RamAddrBus_Q <= SramAddr;
/*根据配置字调整XY*/
         if (IncAddr) begin
            case (SysCmdValue_Q)
            3'b001:begin
                     if (XRegOver) begin
                        XRegValue_Q <= 9'd0;
                     end else begin
                        XRegValue_Q <= XRegValue_Q + 9'd1;
                     end
               end
            3'b011:begin
                     if (XRegOver) begin
                        XRegValue_Q <= 9'd0;
                        if (YRegOver) begin
                           YRegValue_Q <= 9'd0;
                        end else begin
                           YRegValue_Q <= YRegValue_Q + 9'd1;
                        end
                     end else begin
                        XRegValue_Q <= XRegValue_Q + 9'd1;
                     end
               end
            3'b110:begin
                     if (YRegOver) begin
                        YRegValue_Q <= 9'd0;
                     end else begin
                        YRegValue_Q <= YRegValue_Q + 9'd1;
                     end
                  end
            3'b111:begin
                     if (YRegOver) begin
                        YRegValue_Q <= 9'd0;
                        if (XRegOver) begin
                           XRegValue_Q <= 9'd0;
                        end else begin
                           XRegValue_Q <= XRegValue_Q + 9'd1;
                        end
                     end else begin
                        YRegValue_Q <= YRegValue_Q + 9'd1;
                     end
               end
            default:begin
               end
            endcase
         end
         RamCsReg_Q <= SysCmdValue_Q;
   end
end
/*--产生TFT行同步*/
always @(posedge Clk54 or negedge SysRst)
begin
   if (!SysRst) begin
         DotCount_Q = 9'd0;
         DsState_Q = 2'd0;
         DsMark = 1'b0;
   end else begin
         if (DotClkEn_Q) begin
            case (DsState_Q)
            2'd0:/*=>--41 相当于<= 40*/
               DsMark = (DotCount_Q & DotCount_Q);
            2'd1:/*when "01" =>--2 相当于<= 1*/
               DsMark = DotCount_Q;
            2'd2:/*=>--480 相当于<= 479*/
               DsMark = (DotCount_Q & DotCount_Q & DotCount_Q & DotCount_Q &
                           DotCount_Q & DotCount_Q & DotCount_Q & DotCount_Q);
            2'd3:/*--2 相当于<= 1*/
               DsMark = DotCount_Q;
            endcase
            DsState_Q <= DsState_Q + {1'b0,DsMark};
            DotCount_Q <= (DsMark)?9'd0:(DotCount_Q + 9'd1);
         end
   end
end
/*--产生TFT帧同步信号*/
always @(posedge Clk54 or negedge SysRst)
begin
   if (!SysRst) begin
         DE_Q= 1'b0;
   end else begin
         DE_Q <= (SysCmdValue_Q)?1'b0:(HsState_Q & (~HsState_Q) & DsState_Q & (~DsState_Q));
   end
end
/*--产生帧同步时钟*/
always @(posedge Clk54 or negedge SysRst)
begin
   if (!SysRst) begin
         HsCount_Q = 9'd0;
         HsState_Q = 2'd0;
         FillHead_Q = 1'b0;
         SelDispRam_Q = 1'b0;
         LedCount_Q = 5'd0;
   end else begin
         if (DsState_Q & DsState_Q & DotCount_Q & DotClkEn_Q) begin
            case (HsState_Q)
            2'd0:/*--10相当于<= 9*/
               HsMark = (HsCount_Q & HsCount_Q);
            2'd1:/*--2相当于<= 1*/
               begin
                     HsMark = HsCount_Q;
                     FillHead_Q <= (RegAddr_Q & RegAddr_Q & RegAddr_Q & WrEn_Q);
                     SelDispRam_Q <= SysCmdValue_Q;
               end
            2'd2:/*--272相当于<= 271*/
               HsMark = (HsCount_Q & HsCount_Q & HsCount_Q & HsCount_Q & HsCount_Q);
            2'd3:/*--2相当于<= 1*/
               HsMark = HsCount_Q;
            endcase
            HsState_Q <= HsState_Q + {1'b0,HsMark};
            HsCount_Q <= (HsMark)?9'd0:(HsCount_Q + 9'd1);
            LedCount_Q <= LedCount_Q + 5'd1;
         end
   end
end
/*LED调光进程*/
always @(posedge Clk54 or negedge SysRst)
begin
   if (!SysRst) begin
         LedOn_W = 1'b0;
         LedOn_Q = 1'b0;
   end else begin
         case (SysCmdValue_Q)
         3'd0:
            LedOn_W = 1'b0;
         3'd1:
            LedOn_W = (LedCount_Q < 5'd8)?1'b1:1'b0;
         3'd2:
            LedOn_W = (LedCount_Q < 5'd12)?1'b1:1'b0;
         3'd3:
            LedOn_W = (LedCount_Q < 5'd16)?1'b1:1'b0;
         3'd4:
            LedOn_W = (LedCount_Q < 5'd20)?1'b1:1'b0;
         3'd5:
            LedOn_W = (LedCount_Q < 5'd24)?1'b1:1'b0;
         3'd6:
            LedOn_W = (LedCount_Q < 5'd28)?1'b1:1'b0;
         default:
            LedOn_W = 1'b1;
         endcase
      // LedOn_Q <= (SysCmdValue_Q)?1'b0:LedOn_W;
   LedOn_Q <=SysCmdValue_Q;
   end
end
endmodule

zouyf12 发表于 2011-10-27 12:25:46

小白有一事不明，你用的液晶屏就是一般MCU驱动的那种里面带驱动芯片的屏还是只有液晶面板没有驱动芯片的屏

jobwork 发表于 2011-10-27 12:57:28

不带总线型驱动芯片的屏

BladeEagle 发表于 2011-10-27 16:53:06

还有板子吗？买一块

roguebear1 发表于 2011-10-27 17:06:20

mark

cy8051 发表于 2011-10-27 17:27:31

mark

pcli218 发表于 2011-10-27 21:51:26

收藏一下！

zouyf12 发表于 2011-10-29 00:58:27

回复【30楼】jobwork 无业游侠
-----------------------------------------------------------------------

也就是单独一个屏幕不带任何芯片了？？这种屏怎么控制显示东西啊，LZ厉害，小弟只会扫数码管~~~

Totry 发表于 2011-10-29 03:14:57

泼水…

但凡做类似东西的人，都是自起炉灶，自画电路自行布板，代码更是如出一辙，结果也多是不了了之

建议：尽可能共用一套电路一套PCB，大家共同做一个项目，这样才有积累，才有真正的提高！更为关键的是，出了问题才好解决，才更能充分体现出本坛乐于共享交流的初衷。

这个方案自己做可行性不大，成本难以控制且货源复杂，楼上核算的成本太过天真，批量生产时会凸现出很多问题，尤其是新手，绝不建议拿公_款做这类带有一定实验性质的事，当然，除非老板心甘情愿…

avrgogo 发表于 2011-10-29 09:27:21

学习下，谢谢楼主。

ww1228 发表于 2011-10-29 09:40:14

上班了再细看

jobwork 发表于 2011-10-29 10:31:34

回复【30楼】jobwork 无业游侠
-----------------------------------------------------------------------
也就是单独一个屏幕不带任何芯片了？？这种屏怎么控制显示东西啊，lz厉害，小弟只会扫数码管~~~
-----------------------------------------------------------------------
电路板背面有芯片的，nios 控制的

回复【36楼】Totry
泼水…
但凡做类似东西的人，都是自起炉灶，自画电路自行布板，代码更是如出一辙，结果也多是不了了之
建议：尽可能共用一套电路一套pcb，大家共同做一个项目，这样才有积累，才有真正的提高！更为关键的是，出了问题才好解决，才更能充分体现出本坛乐于共享交流的初衷。
这个方案自己做可行性不大，成本难以控制且货源复杂，楼上核算的成本太过天真，批量生产时会凸现出很多问题，尤其是新手，绝不建议拿公_款做这类带有一定实验性质的事，当然，除非老板心甘情愿…
-----------------------------------------------------------------------

没理解你说的意思，我做这个是在学习，什么自起炉灶，批量生产，根本谈不上，只是给单位产品做个检测装备

i55x 发表于 2011-10-31 17:16:02

mark

liuxiuqi0119 发表于 2011-11-1 09:24:25

关注在做这方面的事情

dyggyd 发表于 2011-11-6 23:35:17

mark ok

McuY 发表于 2011-11-6 23:46:56

回复【39楼】jobwork 无业游侠
-----------------------------------------------------------------------

maxII 能用nios？

weather211 发表于 2011-11-8 10:32:48

mark 感谢楼主

jobwork 发表于 2011-11-8 11:28:47

回复【43楼】McuY
回复【39楼】jobwork 无业游侠
-----------------------------------------------------------------------
maxii 能用nios？
-----------------------------------------------------------------------

不好意思，我没表达清楚

maxii做的屏驱动8088总线的，我说的背面有芯片，说的是我电路板背面还有一个ep3c10最小系统板跑的是NIOS，

wukongli 发表于 2011-11-24 13:13:25

楼主辛苦了

cy8051 发表于 2011-11-24 14:17:55

mark

yusufu 发表于 2011-11-24 14:24:58

mark~~学习~

xue11 发表于 2011-11-28 16:06:17

mark.学习了。

jobwork 发表于 2011-11-29 19:48:40

还有10快空板，用上面贴出的代码就可以驱动，原理图在楼主位
有学这个的联系，grpmcu@163.com

choncan 发表于 2011-12-1 21:33:23

mark

li20030505 发表于 2011-12-6 16:52:00

MARK

aitchouyz 发表于 2011-12-7 10:02:06

mark!!

colinin 发表于 2011-12-7 13:17:39

楼主请问您有这个板子的PCB文件吗？可否上传一个，谢谢！

517650971 发表于 2011-12-7 19:36:52

顶下

Tomas_Yung 发表于 2011-12-7 20:54:23

用arm省事

weiweisun 发表于 2011-12-9 21:50:15

回复【28楼】jobwork 无业游侠
这是全部代码，de驱动，hsync 固定低电平
感谢widesoft2 通关的代码原帖
http://www.ourdev.cn/bbs/bbs_content.jsp?bbs_sn=4799753&bbs_page_no=1&search_mode=3&search_text=widesoft2&bbs_id=1029
/*
接口说明:
clk54:系统晶振,选择54m晶振
sysrst:系统复位线.
exdatabus:外部16位数据总线
excs:控制器片选,
exrs:数据批令选择
exwr:写信号
exrd:读信号
ramaddrbus:显存地址线.
ramdatabus:显存数据总线
ramcs:显存片选
ramwe:显存写选通.
ledon:背光控制pwm
de:tft屏
de:vsynctft屏,
hsy......
-----------------------------------------------------------------------

那位大侠能把寄存器注一下，写RAM的部份看不太懂

weiweisun 发表于 2011-12-9 21:51:02

hunningtu 发表于 2011-12-11 11:00:00

mark.

millionlee3 发表于 2011-12-13 14:58:04

持续关注此帖。等待审核。都注_册好几次了

widesoft2 发表于 2011-12-16 19:30:36

今天看有网友能利用我的代码，点亮TFT屏,心里比较高兴。在论坛上学会了AVR的GCC，这段代码也算是回馈论坛了。

lqsoft 发表于 2011-12-17 07:33:13

mark

batou 发表于 2012-2-26 15:50:52

mark

liming 发表于 2012-2-26 22:04:43

资料不错

ddny2008 发表于 2012-2-27 21:26:25

MARK

msdy 发表于 2012-2-27 21:55:59

顶

clogord 发表于 2012-2-27 22:53:34

没有讲解只有代码郁闷......

shangdawei 发表于 2012-2-29 09:27:56

library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;

entity pll4f is
port (
   signal CLK    : IN STD_LOGIC;
   signal STAUSCNT : BUFFER STD_LOGIC_VECTOR (2 DOWNTO 0)
);
end entity pll4f;
architecture pll4 of pll4f is

begin

process (CLK)
begin
   IFCLK' EVENT AND CLK = '1' THEN
         IF STAUSCNT = "110" THEN
            STAUSCNT <= "001";
         ELSE
            STAUSCNT <= STAUSCNT+1;
         END IF;
   END IF;
end process;
end pll4;

请问不需要复位到 "001" 吗? 参考这个代码
http://www.ourdev.cn/bbs/bbs_content.jsp?bbs_sn=4534978&bbs_page_no=1&search_mode=1&search_text=tft&bbs_id=1029

process (Clk54,SysRst)
begin
   if SysRst = '0' then

         ClkCnt_3 <= "001";

         Pclk <= '0';
         DotClkEn <= '0';
   elsif (Clk54'event and Clk54 = '1') then
         if (ClkCnt_3(2) and ClkCnt_3(1)) = '1' then --到达状态11X时重新计数
            ClkCnt_3 <= "001";
         else
            ClkCnt_3 <= ClkCnt_3 + 1;
         end if;
         Pclk <= ClkCnt_3(2);
         DotClkEn <= ((not ClkCnt_3(2)) and ClkCnt_3(1) and ClkCnt_3(0));
   end if;
end process;

shangdawei 发表于 2012-2-29 14:34:49

mark, 学习...

RLCIC 发表于 2012-2-29 20:02:06

公司用PowerPC处理器，没有LCD控制器，正需要用FPGA做一个，还没思路，正打算FPGA+SDRAM做，道路漫长啊，看别人的代码总是很痛苦的事情

CODE2 发表于 2012-3-1 10:28:18

mark~~~~

myhonour 发表于 2012-3-1 10:42:05

mark~~~~

yanghengxu 发表于 2012-3-26 19:21:53

Mark了。。。。。。

lkl10800139 发表于 2012-3-28 23:48:12

支持楼主的分享

lkl10800139 发表于 2012-3-31 01:39:19

酷帖。收下。多谢分享。

lhao2199 发表于 2012-4-20 23:20:31

如果换成7，8寸屏的驱动呢

xingchen 发表于 2012-4-26 16:22:03

mark......................

lwg998 发表于 2012-4-27 17:55:36

楼主做的挺好的，还有板子没，我买个玩下

lwg998 发表于 2012-4-27 17:56:00

我的QQ:104015445

gginhouse 发表于 2012-4-27 23:11:33

不错，学习中

cdlxzlp 发表于 2012-4-29 16:55:48

哈哈啊我也想做没时间

ljt80158015 发表于 2012-4-29 19:40:24

lhao2199 发表于 2012-4-20 23:20
如果换成7，8寸屏的驱动呢

都能驱动的吧？

ljt80158015 发表于 2012-4-29 19:41:10

本帖最后由 ljt80158015 于 2012-4-30 11:18 编辑

很好的学习资料！

其实直接用TFT控制器也挺好的，比如：ra8875

jobwork 发表于 2012-5-1 22:01:50

ljt80158015 发表于 2012-4-29 19:41 static/image/common/back.gif
很好的学习资料！

其实直接用TFT控制器也挺好的，比如：ra8875

ra8875比这个有优势

wweiboou 发表于 2012-5-2 15:54:11

刚开始接触cpld,不太懂

ginonie 发表于 2012-8-5 23:25:47

mark！！！！

am869943552 发表于 2012-8-13 14:29:53

mark!!!{:lol:}

hunningtu 发表于 2012-8-14 21:23:11

jobwork 发表于 2011-10-15 10:28 static/image/common/back.gif
通用的4.3寸TFT时序图

(原文件名:时序.jpg)

有点不明白DE模式，assign HSync = 1'b0;将Hsync拉低，根据时序图上，DE信号是输出信号，不对Hsync计数，在什么时候将它拉高呢？

Sullivan 发表于 2012-8-14 21:53:13

jobwork 发表于 2011-10-29 10:31 static/image/common/back.gif
回复【30楼】jobwork 无业游侠
---------------------------------------------------------------------- ...

我顶你

nust_奔跑 发表于 2012-8-17 00:01:42

LZ是完全用CPLD驱动没有驱动芯片的液晶屏么？
学习了~

ieee911 发表于 2012-8-17 07:41:40

收藏一下！

PLM 发表于 2012-9-9 19:13:44

以后会用上

langxing08 发表于 2012-9-25 14:15:24

gaoyu 发表于 2011-10-15 22:28 static/image/common/back.gif
问一下用FPGA中的程序在断电后会消失吗是sof格式的初学者多多指教哈

fpga断电后，会消失，因为是基于sram的

浮云残雪 发表于 2012-9-26 13:53:41

加油继续努力。。。。共同进步

am869943552 发表于 2012-10-19 15:32:28

MARK一下

fickle 发表于 2012-10-21 18:11:00

做的不错，顶一个！

lfeng105 发表于 2012-10-22 09:30:08

MARK,有空的时候研究一下，正好有好多4.3的屏

jjj 发表于 2012-11-7 22:50:09

mark cpld tft 4.3 driver

shu87946726 发表于 2013-1-6 22:05:18

非常感谢楼主的分享

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一步一步学CPLD+SRAM驱动tft4.3寸液晶屏（连载。。。。）