ARM+FPGA架构开发板PCIE2SCREEN示例分析与测试-米尔MYD-JX8MMA7

glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, vW, vH, 0, GL_RGBA, GL_UNSIGNED_BYTE, pRGB);

int xdma_programe::read_pack(char *pData, int len)
{
    //int buffer[1920 * 1080];
    //int buffer[1024 * 768];
    int buffer[1280 * 720];
    int i;

    if(dev_fd != NULL)
    {
        fpga_send(dev_fd, 0, buffer, len / 4, 0, 1, 25000);
        fpga_recv(dev_fd, 0, buffer, len / 4, 25000);
        memcpy(pData, (char *)buffer, len);

        return len;
    }
    else
    {
        return 0;
    }
}

always @(posedge CLK or posedge RST) begin
        if (RST) begin
                rLen <= #1 0;
                rCount <= #1 0;
                rState <= #1 0;
                rData <= #1 0;
                vout_vs_r <= #1 0;
        end
        else begin
          case (rState)


                3'd0: begin // Wait for start of RX, save length
                        if (CHNL_RX) begin
                                rLen <= #1 CHNL_RX_LEN;
                                rCount <= #1 0;
                                rState <= #1 3'd1;
                        end
                end


                3'd1: begin // Wait for last data in RX, save value
                        if (CHNL_RX_DATA_VALID) begin
                                rData <= #1 CHNL_RX_DATA;
                                rCount <= #1 rCount + (C_PCI_DATA_WIDTH/32);
                        end
                        if (rCount >= rLen)begin
                                rState <= #1 3'd2;
                                end
                end

                3'd2: begin // Prepare for TX
                        if (read_valid) begin                
                             rCount <= #1 0;
                             rState <= #1 3'd3;
                             end
                end

                3'd3: begin // Start TX with save length and data value
                        if (CHNL_TX_DATA_REN) begin
                                //rData <= #1 data_in;
                                rCount <= #1 rCount + (C_PCI_DATA_WIDTH/32);
                                if (rCount >= rLen)
                                        rState <= #1 3'd4;                
                        end
                end
                3'd4: begin
            if (vout_vs_r)         
                rState <= #1 3'd5;
            else begin                
                        vout_vs_r <= #1 1;
                        rState <= #1 3'd4;
                        rCount <= #1 0;
                        end
                end        
                3'd5: begin
             if (vs_flag) begin         
                 rState <= #1 3'd0;
                 vout_vs_r <= #1 0;
                 end
             else                 
                 rState <= #1 3'd5;
         end                                      
          endcase
        end
end

……
reg [31:0] rColor = 0;
……
assign CHNL_TX_DATA = (read_en)? {rColor, rColor}:64'd0;
……
                3'd3: begin // Start TX with save length and data value
                        if (CHNL_TX_DATA_REN) begin
                                //rData <= #1 data_in;
//                                if (rCount % 5 == 4)
                rColor <= #1 rColor + 1;
                                if(rColor >= 255)
                                    rColor <= #1 0;
                                rCount <= #1 rCount + (C_PCI_DATA_WIDTH/32);
                                if (rCount >= rLen)
                                        rState <= #1 3'd4;                
                        end
                end
……