基于CY7C68013A usb转mdio win10 64bit

朱雀 2022-12-21 03:20 171阅读 0赞

# 基于CY7C68013A usb转mdio win10 64bit #

--------------------

## 1、芯片简介： ##

目前市场上主流的实现USB通信的方案主要是基于stm32(基于目前比较流行的DAPLink方案)/ft232/ch341等，CY7C68013A芯片历史较久，价格也相对偏高但USB通信设计的方法应该都是一致的。

手上正好有一块下图的开发板：说明：**图中蓝色的双刀按钮存在明显接触不良的现象，建议直接将其短路**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70][]

***说明：目前使用win10 64bit的机器开发上述开发板并未发现有任何驱动问题***

CY7C68013A:可以简单理解为带有USB接口8051芯片

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 1][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 2][]

### 开发环境配置： ###

![20201114124733241.png][] 使用的还是2008年的版本

也有更新一点的版本：![20201114124955569.png][]需要去官网查找，感觉用法应该差不多

建议默认安装在c盘，这样自带的示例可以直接在keil2中编译，不需要需改工程路径

![20201114122207153.png][]

## 2、USB 4种通信方式及端点配置： ##

![20201114125549781.png][]

USB设备驱动向USB控制器驱动请求的每次传输被称为一个事务（Transaction），事务有四种类型，分别是Bulk Transaction、Control Transaction、Interrupt Transaction和Isochronous Transaction。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 3][]

可以看到内部空间划分如下：

![20201114130158365.png][]

### 端点配置： ###

全速只用64字节，高速用512，一共支持12中配置模式如下：一般端点0用于控制,EP1用于中断，EP2468用于bulk,iso.

![20201114130239977.png][]

12种配置方式：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 4][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 5][]

## 3、实现方式： ##

###     bulkloop入门 ###

使用的参考例程基于bulkloop修改而来：

但没有使用bulk的通信模式，**而是利用的control通信模式**

打开bulkloop的keil工程，这样的模板里我们只需要关注两个函数：

TD\_Init()函数，只执行一次，在末尾增加我们需要的初始化代码（比如Port的设置）：

void TD_Init(void)             // Called once at startup
    {
       // set the CPU clock to 48MHz
       CPUCS = ((CPUCS & ~bmCLKSPD) | bmCLKSPD1) ;
    
       // set the slave FIFO interface to 48MHz
       IFCONFIG |= 0x40;
    
      // default: all endpoints have their VALID bit set
      // default: TYPE1 = 1 and TYPE0 = 0 --> BULK  
      // default: EP2 and EP4 DIR bits are 0 (OUT direction)
      // default: EP6 and EP8 DIR bits are 1 (IN direction)
      // default: EP2, EP4, EP6, and EP8 are double buffered
    
      // we are just using the default values, yes this is not necessary...
      EP1OUTCFG = 0xA0;
      EP1INCFG = 0xA0;
      SYNCDELAY;                  
      EP2CFG = 0xA2;
      SYNCDELAY;                    
      EP4CFG = 0xA0;
      SYNCDELAY;                    
      EP6CFG = 0xE2;
      SYNCDELAY;                    
      EP8CFG = 0xE0;
    
      // out endpoints do not come up armed
      
      // since the defaults are double buffered we must write dummy byte counts twice
      SYNCDELAY;                    
      EP2BCL = 0x80;                // arm EP2OUT by writing byte count w/skip.
      SYNCDELAY;                    
      EP2BCL = 0x80;
      SYNCDELAY;                    
      EP4BCL = 0x80;                // arm EP4OUT by writing byte count w/skip.
      SYNCDELAY;                    
      EP4BCL = 0x80;    
    
      // enable dual autopointer feature
      AUTOPTRSETUP |= 0x01;
    //
    
      OEA=0x7F;
      IOA=0xFc;
    
    }

TD\_Poll()函数，会被一直循环，可以不断查询状态寄存器，根据其结果执行需要的功能，bulkloop便是基于此方式实现

void TD_Poll(void)              // Called repeatedly while the device is idle
    {
      WORD i;
      WORD count;
     //
      if(!(EP2468STAT & bmEP2EMPTY))
      { // check EP2 EMPTY(busy) bit in EP2468STAT (SFR), core set's this bit when FIFO is empty
         if(!(EP2468STAT & bmEP6FULL))
         {  // check EP6 FULL(busy) bit in EP2468STAT (SFR), core set's this bit when FIFO is full
            APTR1H = MSB( &EP2FIFOBUF );
            APTR1L = LSB( &EP2FIFOBUF );
    
            AUTOPTRH2 = MSB( &EP6FIFOBUF );
            AUTOPTRL2 = LSB( &EP6FIFOBUF );
    
            count = (EP2BCH << 8) + EP2BCL;
    
            // loop EP2OUT buffer data to EP6IN
            for( i = 0x0000; i < count; i++ )
            {
               // setup to transfer EP2OUT buffer to EP6IN buffer using AUTOPOINTER(s)
               EXTAUTODAT2 = EXTAUTODAT1;
            }
            //
            
            //
            EP6BCH = EP2BCH;  
            SYNCDELAY;  
            EP6BCL = EP2BCL;        // arm EP6IN
            SYNCDELAY;                    
            EP2BCL = 0x80;          // re(arm) EP2OUT
         }
      }
    
      if(!(EP2468STAT & bmEP4EMPTY))
      { // check EP4 EMPTY(busy) bit in EP2468STAT (SFR), core set's this bit when FIFO is empty
         if(!(EP2468STAT & bmEP8FULL))
         {  // check EP8 FULL(busy) bit in EP2468STAT (SFR), core set's this bit when FIFO is full
            APTR1H = MSB( &EP4FIFOBUF );
            APTR1L = LSB( &EP4FIFOBUF );
    
            AUTOPTRH2 = MSB( &EP8FIFOBUF );
            AUTOPTRL2 = LSB( &EP8FIFOBUF );
    
            count = (EP4BCH << 8) + EP4BCL;
    
            // loop EP4OUT buffer data to EP8IN
            for( i = 0x0000; i < count; i++ )
            {
               // setup to transfer EP4OUT buffer to EP8IN buffer using AUTOPOINTER(s)
               EXTAUTODAT2 = EXTAUTODAT1;
            }
            EP8BCH = EP4BCH;  
            SYNCDELAY;  
            EP8BCL = EP4BCL;        // arm EP8IN
            SYNCDELAY;                    
            EP4BCL = 0x80;          // re(arm) EP4OUT
         }
      }
    }

###     上位机与固件修改： ###

使用控制节点发送verdor req命令执行：简单测试并不需要编写上位机及驱动直接利用自带的开发工具即可

固件：对DR\_VendorCmnd()函数做修改来实现mdio的读写命令，该命令对应的操作按钮为：

![2020111413315967.png][]

![20201114133127662.png][]

有一些命令似乎芯片默认已经使用，如下表，因此选择了0x20(仅测试返回固定值)开始，写0x21/读0x22

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 6][]

修改如下：

BOOL DR_VendorCmnd(void)
    {
            WORD w0;
            WORD		addr, len, bc;
    	WORD		ChipRev;
    	WORD i;
    
    	switch(SETUPDAT[1])
    	{ //TPM handle new commands
    	  case 0x20:
    		    *EP0BUF = 0x15;
    		    EP0BCH = 0;
    		    EP0BCL = 1; // Arm endpoint with # bytes to transfer
    		    EP0CS |= bmHSNAK; // Acknowledge handshake phase of device request
    		    break;
               case 0x21://write eth mdio
    		    *EP0BUF = SETUPDAT[2];
                        *(EP0BUF+1) = SETUPDAT[3];
                        *(EP0BUF+2) = SETUPDAT[4];
                        *(EP0BUF+3) = SETUPDAT[5];
                        *(EP0BUF+4) = SETUPDAT[6];
                        *(EP0BUF+5) = SETUPDAT[7];
                        *(EP0BUF+6) = g_data0;
                        *(EP0BUF+7) = g_data0>>8;
                        //
    		    w0 = 0;
                        w0 = SETUPDAT[5];
                        w0 = w0<<8;
                        w0 = w0 + SETUPDAT[4];
                        eth_mdio(1,SETUPDAT[2],SETUPDAT[3],w0);
    
    		    EP0BCH = 0;
    		    EP0BCL = 8; // Arm endpoint with # bytes to transfer
    		    EP0CS |= bmHSNAK; // Acknowledge handshake phase of device request
    		    break;
             case 0x22://read eth mdio
    
                        eth_mdio(0,SETUPDAT[2],SETUPDAT[3],0);
    		    *EP0BUF = SETUPDAT[2];
                        *(EP0BUF+1) = SETUPDAT[3];
                        *(EP0BUF+2) = SETUPDAT[4];
                        *(EP0BUF+3) = SETUPDAT[5];
                        *(EP0BUF+4) = SETUPDAT[6];
                        *(EP0BUF+5) = SETUPDAT[7];
                        *(EP0BUF+6) = eth_mdio_rdata>>8;
                        *(EP0BUF+7) = eth_mdio_rdata;
    		    //data0
    		    //*(EP0BUF+6) = g_data0;
                        //*(EP0BUF+7) = g_data0>>8;
    		    EP0BCH = 0;
    		    EP0BCL = 8; // Arm endpoint with # bytes to transfer
    		    EP0CS |= bmHSNAK; // Acknowledge handshake phase of device request
    			break;
           
          
              default:
                 break;
    	
    	}
    	return(FALSE); // no error; command handled OK
    }

注意点：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 7][]

最终实现接口如下:

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 8][]

读一个mdio地址

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 9][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 10][]

写一个mdio地址:

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 11][]

实际测试结果：和FPGA读出的数据一致，功能正常实现，基于此方案还可以类似开发spi/i2c等接口功能

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 12][]

###     mdio时序： ###

类似于i2c但又不是，所以直接使用gpio模拟实现，而没有使用i2c控制器

简单概括就是下降沿写数据，上升沿读数据，由于我们的时钟不是一直有而是通过固定的循环模拟出来的，所以

同时注意在读写的前后多插入一些时钟，手册要求至少32个时钟的Pre

另外注意SDA的空闲状态默认设置为输入，68013芯片端口结构如下：(读写数据时需要切换端口的输入输出方向) /C:\\Cypress\\USB\\doc\\FX2LPEZ-USB\_TRM.pdf

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 13][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 14][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 15][]

gpio-mdio example:其中PA7-SDA PA6-SCL

WORD eth_mdio_rdata = 0;
    WORD g_data0;
    //40kHz 
    void eth_mdio(unsigned char wr,unsigned char phyaddr,unsigned char regaddr,WORD w0)
    {
       
       WORD a=0;
       WORD data0;
       WORD data1;
       unsigned char b =0;
       unsigned char c = 0;
       unsigned char d = 0;
       unsigned char e =0;
       unsigned char f =0;
       unsigned char g =0;
    
       unsigned char t0;
       unsigned char t1;
       unsigned char t2;
       //wr+phyaddr+reg+data   or read +phyaddr+reg
       
       //PA7 SDA
       //PA6 SCL out 
       OEA=0xFF;
       IOA=0xFe;
    
    
    
       //
       phyaddr = phyaddr & 0x1f;
       t1 = (phyaddr >> 1) & 0xf;
       if(wr == 1)
       {
          t0 = 0x50+t1;
       }
       else 
       {
          t0 = 0x60+t1;
       }
       if( (phyaddr & 0x01) == 0x1)
         t2 = 0x80;
       else
         t2 = 0;
       //
       regaddr = regaddr & 0x1f;
       regaddr = regaddr << 2;
       t2 = t2 + regaddr ;
       t2 = t2 | 0x02;
       //   
       data0 = t0;
       data0 = data0 <<8;
       data0 += t2;
       //
       g_data0 = data0;
       //
       f= 0;g= 0;
       for(a=0;a<500;a++)
       {
         //
         if(b==0) IOA |= (1<<6);  //1
         else IOA &= (~(1<<6));   //0
         if(c) b = ~b;
         c = ~c;
         
         //
         if(e>=33)
         {
           if( g==0 )
    	   {
    			 if(d == 1) //negedge out data
    			 {
    			   if(f == 14 )
    			   {
    				  if(wr ==0) OEA=0x7F;
    				   //IOA=0xFe;
    			   }
    			   else if(f == 15 )
    			   {
    				  if(wr ==0) g = 1;
    			   }
    			   else if(f == 16 )
    			   {
    				  if(wr ==1)  data0 = w0;
    			   }
    			   else ;
    			   //
    			   if( (data0 & 0x8000) == 0x8000)
    				 IOA |= (1<<7);  //1
    			   else
    				IOA &= (~(1<<7));//0 
    			   //
    			   data0 = data0 << 1;
    			   f = f+1;      
    		   }
    	   }
    	   else
    	   {
    		   // read data
    		   if(d == 0)
    		   {
    			 if( (IOA & 0x80) == 0x80 )
    				data1 |= 0x0001;
    			 else 
    				data1 &= 0xfffe;
    			 //
    			 if(f < 31)
    			    data1  = data1 <<1;
    			 f = f+1;
    		   }
    	   }
         } 
         
         //
         d= d+1;
         if(d == 4) 
    	 {
    		 d =0;
    		 e = e+1;
    		 if(f == 32)  goto ENDA;
         }
       }
    
    ENDA:
       for(a=0,b=0,c=0;a<4*32;a++)
       {
         //
         if(b==0) IOA |= (1<<6);  //1
         else IOA &= (~(1<<6));   //0
         if(c) b = ~b;
         c = ~c;
       }
       eth_mdio_rdata = data1;
       //
       OEA=0x7F;
       IOA=0xFF;
    
    }

需要注意的是：对于keil2工具在做判断时不能写成

if( (phyaddr & 0x01) )

而应该

if( (phyaddr & 0x01) == 0x1)

个人觉得两者本身没有区别，但编译器存在bug只有第二种可正常执行。

## 4、操作步骤： ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 16][]![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 17][]

首先断开外部E2PROM(也就是把J2接上使芯片识别不到，使用的24LC128的寻址为001，短上后就变成000)，这是后板卡会被芯片按默认状态识别：

![20201114125117706.png][]

当板卡被正常识别后如果需要固化到E2PROM我们还要**再将J2拔掉（否则提示没有EEPROM）**，点击![20201114123437698.png][]选择hex转换成iic文件来固化程序

（c:\\cypress\\usb\\bin\\hex2bix -i -f **0xC2** \-o bulkloop.iic bulkloop.hex）。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 18][]![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 19][]

安装包配套资料还是比较全面的，我们主要用的就两个一个**Download**（选择hex,下载RAM中调试，只要不断电程序会一致保留）/一个**Lg EEPROM**（选择iic,固化程序，需要接上EEPROM）

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEzMjk5Njc_size_16_color_FFFFFF_t_70 20][]

芯片启动方式说明：

上电后芯片会检测EEPROM,如果第一个字节是0xc0就使用EEPROM中的VID/PID/DID，如果是0xc2就会将EEPROM加载到内部RAM执行，

否则使用内部的默认VID/PID/DID启动。

![20201114125647951.png][]![2020111412595347.png][]

## 5、参考： ##

4种通信方式：

[https://blog.csdn.net/clarkness/article/details/87349669][https_blog.csdn.net_clarkness_article_details_87349669]

[https://blog.csdn.net/kof2019/article/details/77774679][https_blog.csdn.net_kof2019_article_details_77774679]

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[https_blog.csdn.net_clarkness_article_details_87349669]: https://blog.csdn.net/clarkness/article/details/87349669
[https_blog.csdn.net_kof2019_article_details_77774679]: https://blog.csdn.net/kof2019/article/details/77774679