赤裸裸的奉献，uCOS+UCGUI3.98移植+4.3寸TFT制作（cpld+sram）-第15页回答

赤裸裸的奉献，uCOS+UCGUI3.98移植+4.3寸TFT制作（cpld+sram）

2019-12-20 21:43发布

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pygh

1楼-- · 2019-12-31 01:30

MARK...MARK

lj11hy

2楼-- · 2019-12-31 02:25

RGB_Q <= (SysCmdValue_Q[3])?16'd0:RamDataBus;
            SramAddr[12:4] = YRegValue_Q[8:0];
            SramAddr[3:0] = XRegValue_Q[8:5];
            RamAddrBus_Q[4:0] <= XRegValue_Q[4:0];
            RamAddrBus_Q[17] <= SysCmdValue_Q[7];
         end else begin
            if (AskWr) begin
                  WrEn_Q <= 1'b1;
            end
            ExBusOut_Q <= RamDataBus;
            SramAddr[12:4] = HsCount_Q[8:0];
            SramAddr[3:0] = DotCount_Q[8:5];
            RamAddrBus_Q[4:0] <= DotCount_Q[4:0];
            RamAddrBus_Q[17] <= SelDispRam_Q;
         end
         InBusOut_Q <= PrePareData;
         RamTriState_Q <= InRamWe;
         RamWeReg_Q <= InRamWe;

         SramAddr[12:0] = SramAddr[12:0] - {4'd0,SramAddr[12:4]};
         RamAddrBus_Q[16:5] <= SramAddr[11:0];

这一段SRAM 地址拼接的代码看了许多遍，但还是不理解，有兄弟能讲解一下吗？多谢！