USB3.0方案FT601Q测速

    Setp by Step FT601Q的驱动支持同步模式245模式，异步模式245模式，以及同步模式Stream方式，和异步模式Stream方式，我们这里以比较简单的同步模式245模式来实现对USB3.0 FT601Q方案测速，当然这种测速的速度肯定比不上Stream模式的正确。如果有时间我们也会给出Stream的模式方案。对于FPGA工程师上位机要写的比较好确实比较难，但是软件工程师，这个都是小意思。
这个例子中我们还简化了USB接口函数的设计，更加方便使用。


1、USB3.0 FPGA 程序设计还是用上一篇文章的就可以了

module ft60x_top( // system control input                  Rstn_i,//fpga reset output                 USBSS_EN,//power enable    // FIFO interface      input                  CLK_i, inout [31:0]           DATA_io, inout [3:0]            BE_io, input                  RXF_N_i,   // ACK_N input                  TXE_N_i, output                 OE_N_o, output                 WR_N_o,    // REQ_N output                 SIWU_N_o, output                 RD_N_o, output                 WAKEUP_o, output [1:0]           GPIO_o, // led output reg            [3:0]LED, input                 [3:0]BTN ); assign USBSS_EN = 1'b1;    assign WAKEUP_o = 1'b1; assign GPIO_o   = 2'b00;    assign SIWU_N_o = 1'b0; wire rstn; (*mark_debug = "true"*) wire            RXF_N_i;   // ACK_N (*mark_debug = "true"*) wire            TXE_N_i; (*mark_debug = "true"*) reg             OE_N_o; (*mark_debug = "true"*) reg             WR_N_o;    // REQ_N (*mark_debug = "true"*) reg             RD_N_o; (*mark_debug = "true"*) (* KEEP = "TRUE" *)wire [31:0] rd_data; (*mark_debug = "true"*) (* KEEP = "TRUE" *)wire [31:0] wr_data; (*mark_debug = "true"*) wire [3 :0] BE_RD; (*mark_debug = "true"*) wire [3 :0] BE_WR; (*mark_debug = "true"*) reg [1:0] USB_S; wire data_rd_valid,data_wr_valid; assign data_rd_valid = (RD_N_o==1'b0)&&(RXF_N_i==1'b0); assign data_wr_valid = (WR_N_o==1'b0)&&(TXE_N_i==1'b0); //read or write flag assign rd_data  =  data_rd_valid ? DATA_io : 32'd0;//read data dir assign DATA_io  =  data_wr_valid ? wr_data : 32'bz;// write data dir assign BE_RD    =  data_rd_valid ? BE_io   : 4'd0; //read data dir assign BE_io    =  data_wr_valid ? BE_WR   : 4'bz;// write data dir assign BE_WR    =  4'b1111; assign wr_data = {8'h00,8'haa,8'hff,4'h0,BTN}; (*mark_debug = "true"*) (* KEEP = "TRUE" *) reg [15:0]rd_cnt; always @(posedge CLK_i)begin     if(!rstn)begin         rd_cnt <= 16'd0;     end     else if(data_rd_valid) begin         rd_cnt <= rd_cnt + 1'b1;     end     else begin        rd_cnt  <= 16'd0;     end end always @(posedge CLK_i)begin     if(!rstn)begin         LED <= 4'b0000;     end     else if(data_rd_valid) begin         LED <= rd_data[3:0];     end end always @(posedge CLK_i)begin     if(!rstn)begin         USB_S <= 2'd0;         OE_N_o <= 1'b1;         RD_N_o <= 1'b1;         WR_N_o <= 1'b1;     end     else begin         case(USB_S)         0:begin             OE_N_o <= 1'b1;             RD_N_o <= 1'b1;             WR_N_o <= 1'b1;             if((!RXF_N_i)) begin                 USB_S  <= 2'd1;                 OE_N_o <= 1'b0;                end             else if(!TXE_N_i)begin                 USB_S  <= 2'd2;             end         end         1:begin             RD_N_o <= 1'b0;                if(RXF_N_i) begin                 USB_S  <= 2'd0;                 RD_N_o <= 1'b1;                 OE_N_o <= 1'b1;                   end         end         2:begin             WR_N_o <= 1'b0;             if(TXE_N_i) begin                 USB_S  <= 2'd0;                 WR_N_o <= 1'b1;              end         end         3:begin             USB_S <= 2'd0;         end         endcase                      end end Delay_rst #(     .num(20'hffff0) ) Delay_rst_inst (     .clk_i(CLK_i),     .rstn_i(Rstn_i),     .rst_o(rstn) );

2、上位机分析

2.1 USB设备接口设计

和前面的教程使用的方法不一样，我们现在重新编写了更加简易的函数调用接口。而且大家可以看到这个函数和我们之前学习的PCIE课程中的函数非常类似，这样我们只要稍加修改就可以把我们之前写的PCIE上位机应用到USB上位机中了。

Usb_fun.c

#ifdef __cplusplus extern "C" { #endif #include <Windows.h> #include <assert.h> #include <stdlib.h> #include <stdio.h> #include <strsafe.h> #include <stdint.h> #include <SetupAPI.h> #include <INITGUID.H> #include <WinIoCtl.h> //#include <AtlBase.h> #include <io.h> #include "FTD3XX.h" //#pragma comment(lib, "../pcie_speed/FTD3XX.lib") DEFINE_GUID(GUID_DEVINTERFACE_FOR_FTDI_DEVICES,      0x36fc9e60, 0xc465, 0x11cf, 0x80, 0x56, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00); static unsigned char *h2c_align_mem_tmp; static unsigned char *c2h_align_mem_tmp; static int cnt1=0; static int cnt2=0; static FT_HANDLE ftHandle; static FT_STATUS ftStatus; static int verbose_msg(const char* const fmt, ...) {     int ret = 0;     va_list args;     if (1) {         va_start(args, fmt);         ret = vprintf(fmt, args);         va_end(args);     }     return ret; } static BYTE* allocate_buffer(size_t size, size_t alignment) {     if(size == 0) {         size = 4;     }     if (alignment == 0) {         SYSTEM_INFO sys_info;         GetSystemInfo(&sys_info);         alignment = sys_info.dwPageSize;         //printf("alignment = %d\n",alignment);     }     verbose_msg("Allocating host-side buffer of size %d, aligned to %d bytes\n", size, alignment);     return (BYTE*)_aligned_malloc(size, alignment); } static void open_devices( int dev ) {     //FT_INVALID_HANDLE         USHORT uwVID = 0;         USHORT uwPID = 0;         GUID DeviceGUID[2] = { 0 };         memcpy(&DeviceGUID[0], &GUID_DEVINTERFACE_FOR_FTDI_DEVICES, sizeof(GUID));         ftStatus = FT_Create(&DeviceGUID[0], FT_OPEN_BY_GUID, &ftHandle);         if (FT_FAILED(ftStatus))         {             verbose_msg("open fail");             return ;         }         ftStatus = FT_GetVIDPID(ftHandle, &uwVID, &uwPID);         if (FT_FAILED(ftStatus))         {             FT_Close(ftHandle);         } } static BOOL read_device( UCHAR* buff, ULONG *length ) {     if (ftStatus != FT_OK)     {         return FALSE;     }     unsigned long readLen;     ftStatus = FT_ReadPipe(ftHandle, 0x82, buff, *length, &readLen, NULL);     BOOL result = TRUE;     if (FT_FAILED(ftStatus) || readLen != *length)     {         result = FALSE;     }     *length = readLen;     return result; } static BOOL write_device( UCHAR *data, ULONG *length ) {     if (ftStatus != FT_OK)     {         return FALSE;     }     unsigned long writenLen;     ftStatus = FT_WritePipe(ftHandle, 0x02, data, *length, &writenLen, NULL);     BOOL result = TRUE;     if (FT_FAILED(ftStatus) || writenLen != *length)     {         result = FALSE;     }     return result; } int usb_init() {     int res = 1;     open_devices(0);     h2c_align_mem_tmp = allocate_buffer(0x800000,4096);     c2h_align_mem_tmp = allocate_buffer(0x800000,4096);     if(NULL == h2c_align_mem_tmp || NULL == c2h_align_mem_tmp)         return 0;     return res; } void usb_deinit() {     FT_Close(ftHandle); } unsigned int h2c_transfer(unsigned int size) {     double bd=0;     double time_sec;     LARGE_INTEGER start;     LARGE_INTEGER stop;     LARGE_INTEGER freq;     QueryPerformanceFrequency(&freq);     QueryPerformanceCounter(&start);     write_device(h2c_align_mem_tmp,&size);     QueryPerformanceCounter(&stop);     time_sec = (unsigned long long)(stop.QuadPart - start.QuadPart) / (double)freq.QuadPart;     bd = ((double)size)/(double)(time_sec)/1024.0/1024.0;     return (unsigned int)bd; } unsigned int c2h_transfer(unsigned int size) {     double bd=0;     double time_sec;     LARGE_INTEGER start;     LARGE_INTEGER stop;     LARGE_INTEGER freq;     QueryPerformanceFrequency(&freq);     QueryPerformanceCounter(&start);     read_device(c2h_align_mem_tmp,&size);     QueryPerformanceCounter(&stop);     time_sec = (unsigned long long)(stop.QuadPart - start.QuadPart) / (double)freq.QuadPart;     bd = ((double)size)/(double)(time_sec)/1024.0/1024.0;     return (unsigned int)bd; } #ifdef __cplusplus } #endif

2.2 为了设计绚丽的测试码表控件我们用到了以下代码，这个码表测速也是我们PCIE中用到的程序

myspeed.c

#include "myspeed.h" #include <QPainter> #include <qmath.h> mySpeed::mySpeed(QWidget *parent): QWidget(parent) {     m_background = Qt::black;     m_foreground = Qt::green;     m_startAngle=60;     m_endAngle=60;     m_scaleMajor=10;     m_minValue=0;     m_maxValue=1000;     m_scaleMajor = 10;//分度     m_scaleMinor = 10;     m_units = "MB/S";     m_title = "Speed USB";     m_precision = 2;     m_value=0;     m_updateTimer = new QTimer(this);     m_updateTimer->setInterval(50);//     connect(m_updateTimer,SIGNAL(timeout()),this,SLOT(UpdateAngle()));       m_updateTimer->start();//      //setWindowFlags(Qt::FramelessWindowHint);//      //setAttribute(Qt::WA_TranslucentBackground);//      resize(400,400); } mySpeed::~mySpeed() { } void mySpeed::drawCrown(QPainter *painter) {     painter->save();     int radius =100;     QLinearGradient lg1(0,-radius,0,radius);     lg1.setColorAt(0.2,Qt::white);     lg1.setColorAt(1,Qt::black);     painter->setBrush(lg1);     painter->drawEllipse(-100, -100, 200 ,200);     painter->restore(); } void mySpeed::drawBackground(QPainter *painter) {     painter->save();     painter->setBrush(m_background);     painter->drawEllipse(-90, -90, 180 ,180);     painter->restore(); } void mySpeed::drawScaleNum(QPainter *painter) {     painter->save();     painter->setPen(m_foreground);     double startRad = (360 - m_startAngle - 90) * (3.14 / 180);     double deltaRad = (360 - m_startAngle - m_endAngle) * (3.14 / 180) / m_scaleMajor;     double sina,cosa;     int x, y;     QFontMetricsF fm(this->font());     double w, h, tmpVal;     QString str;     for (int i = 0; i <= m_scaleMajor; i++)     {         sina = sin(startRad - i * deltaRad);         cosa = cos(startRad - i * deltaRad);        tmpVal = 1.0 * i *((m_maxValue - m_minValue) / m_scaleMajor) + m_minValue;         str = QString( "%1" ).arg(tmpVal);         w = fm.size(Qt::TextSingleLine,str).width();         h = fm.size(Qt::TextSingleLine,str).height();         x = 82 * cosa - w / 2;         y = -82 * sina + h / 4;         painter->drawText(x, y, str);     }     painter->restore(); } void mySpeed::drawScale(QPainter *painter) {     painter->save();     painter->rotate(m_startAngle);     int steps = (m_scaleMajor * m_scaleMinor);     double angleStep = (360.0 - m_startAngle - m_endAngle) / steps;     painter->setPen(m_foreground);     QPen pen = painter->pen();     for (int i = 0; i <= steps; i++)     {         if (i % m_scaleMinor == 0)         {             pen.setWidth(1);             painter->setPen(pen);             painter->drawLine(0, 62, 0, 72);         }         else         {             pen.setWidth(0);             painter->setPen(pen);             painter->drawLine(0, 67, 0, 72);         }         painter->rotate(angleStep);     }     painter->restore(); } void mySpeed::drawTitle(QPainter *painter) {     painter->save();     painter->setPen(m_foreground);     //painter->setBrush(m_foreground);     QString str(m_title);     QFontMetricsF fm(this->font());     double w = fm.size(Qt::TextSingleLine,str).width();     painter->drawText(-w / 2, -30, str);     painter->restore(); } void mySpeed::drawNumericValue(QPainter *painter) {     QString str  =  QString("%1 %2").arg(m_value, 0, 'f', m_precision).arg(m_units);     QFontMetricsF fm(font());     double w = fm.size(Qt::TextSingleLine,str).width();     painter->setPen(m_foreground);     painter->drawText(-w / 2, 42, str); } void mySpeed::drawIndicator(QPainter *painter) {     painter->save();     QPolygon pts;     pts.setPoints(3, -2,0, 2,0, 0,60);     /* (-2,0)/(2,0)/(0,60) *///     painter->rotate(m_startAngle);     double degRotate =  (360.0 - m_startAngle - m_endAngle)/(m_maxValue - m_minValue)*(m_value - m_minValue);     painter->rotate(degRotate);  //     QRadialGradient haloGradient(0, 0, 60, 0, 0);  //     haloGradient.setColorAt(0, QColor(60,60,60));     haloGradient.setColorAt(1, QColor(160,160,160)); //     painter->setPen(Qt::white); //     painter->setBrush(haloGradient);//     painter->drawConvexPolygon(pts); //     painter->restore();     //画中心点     QColor niceBlue(150, 150, 200);     QConicalGradient coneGradient(0, 0, -90.0);  //     coneGradient.setColorAt(0.0, Qt::darkGray);     coneGradient.setColorAt(0.2, niceBlue);     coneGradient.setColorAt(0.5, Qt::white);     coneGradient.setColorAt(1.0, Qt::darkGray);     painter->setPen(Qt::NoPen);  //     painter->setBrush(coneGradient);     painter->drawEllipse(-5, -5, 10, 10); } void mySpeed::paintEvent(QPaintEvent *) {     QPainter painter (this);     painter.setRenderHint(QPainter::Antialiasing);     painter.translate(width()/2,height()/2);     int side = qMin(width(),height());     painter.scale(side /200.0,side /200.0);     drawCrown(&painter);     drawBackground(&painter);     drawScaleNum(&painter);     drawScale(&painter);     drawTitle(&painter);     drawNumericValue(&painter);     drawIndicator(&painter); } void mySpeed::UpdateAngle() {   //m_value += 1;   //if(m_value > 1000)   //{   //   m_value = 0;   //}   //m_angle = ((m_angle + 1) % 360);   update();// }

2.3 主程序中，我们会定时调用测试函数进行测速，并且把测试的值通过码表程序显示

#include "mainwindow.h" #include "ui_mainwindow.h" #include "usb_fun.h" MainWindow::MainWindow(QWidget *parent) :     QWidget(parent),     ui(new Ui::MainWindow) {     //init ui     QGridLayout *pUserLayout = new QGridLayout(this);     for(int i=0;i<2;i++)     {         ppmySpeed = new mySpeed;         i ? ppmySpeed->m_title = "Read Speed" : ppmySpeed->m_title = "Write Speed" ;         pUserLayout->addWidget(ppmySpeed, 0, i);      }     ui->setupUi(this);     this->setWindowTitle(tr("MSXBO USB3.0 Speed(V1.01)"));     //init usb     if(usb_init()<0)     {         QMessageBox::information(this,"ERROR","usb init error");     }     isc2h_start = false;     ish2c_start = false;     c2h_transfer_size = 0x80000;     h2c_transfer_size = 0x80000;     m_QTimer_c2h = new QTimer(this);     m_QTimer_h2c = new QTimer(this);     connect(m_QTimer_c2h,SIGNAL(timeout()),this,SLOT(c2h_transfer_one_time()));     connect(m_QTimer_h2c,SIGNAL(timeout()),this,SLOT(h2c_transfer_one_time())); } MainWindow::~MainWindow() {     usb_deinit();     delete ui; } void MainWindow::c2h_transfer_one_time() {     unsigned int bd=0;     bd = c2h_transfer(c2h_transfer_size);     ppmySpeed[1]->m_value=bd;     //QString str = QString("%1").arg(bd);     //str += "MB/s";     //ui->lineEdit_c2h->setText(str); } void MainWindow::h2c_transfer_one_time() {     //transfer h2c     unsigned int bd=0;     bd = h2c_transfer(h2c_transfer_size);     ppmySpeed[0]->m_value=bd;     //QString str = QString("%1").arg(bd);     //str += "MB/s";     //ui->lineEdit_h2c->setText(str); } void MainWindow::on_pushButton_h2c_start_clicked() {     if(false==ish2c_start)     {         ish2c_start = true;         m_QTimer_h2c->start(100);         ui->pushButton_h2c_start->setText("STOP");     }     else     {         ish2c_start = false;         m_QTimer_h2c->stop();         ui->pushButton_h2c_start->setText("START");     } } void MainWindow::on_pushButton_c2h_start_clicked() {     if(false==isc2h_start)     {         isc2h_start = true;         m_QTimer_c2h->start(100);         ui->pushButton_c2h_start->setText("STOP");     }     else     {         isc2h_start = false;         m_QTimer_c2h->stop();         ui->pushButton_c2h_start->setText("START");     } }

3、测速结果

4、思考

USB3.0和PCIE2.0的串行传输方式非常类似，速度也非常接近，但是FT601Q 没有同时双向处理的能力，我们的程序为什么可以同时进行读写呢？显示不可能同时读写的，实际上你看到的感觉读和写同时在进行实际上，对于FT601Q和FPGA的通信来说，他们一个时刻只能是写或者读，所以如果同时读写，速度至少要降低一半的。我们这里测速只对单次读，和单次写进行了测速。具体的可以去看看代码，理解代码才是王道。

感谢分享

感谢分享

感谢分享