Рабочий пример работы SL811 в режиме host'a Опции

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Тема поднималась милион раз, но никто так и не удосужился запостить пример. Значит буду первым:

Код

#define MASTER_MODE             0x80

void SL811_Init(void)
{    
    SL811Write(cDATASet, 0xe0); //SOF Timeout Value
    SL811Write(cSOFcnt, 0x2e | MASTER_MODE);
    SL811Write(CtrlReg, 0x5);            
    SL811Write(EP0Status, PID_SOF);
    SL811Write(EP0Counter, 0);              //Set Endpoint Zero
    SL811Write(EP0Control, 0x01);            //Start the SOF
    SL811Write(IntEna, INSERT_REMOVE);      //USB-A, Insert/Remove, USB_Resume.
    SL811Write(IntStatus, INT_CLEAR);    //Clear Interrupt enable status
    
}

#define NO_ERROR 0
#define ERROR_TIMEOUT 1
#define ERROR_STALL 2
#define ERROR_OVERFLOW 3
#define ERROR_EP0_ERROR 4
#define ERROR_UNKNOWN 5


int SendData(void * pData, int DataSize)
{
  unsigned char result, intr, remainder,timeout;
  SL811BufWrite(EP0_Buf,pData,DataSize);

  SL811Write(EP0Status,(PID_SETUP | 0));  // PID + EP address
  SL811Write(EP0Counter,0);               // USB address
  SL811Write(EP0Address,EP0_Buf);         // buffer address, start with "data0"
  SL811Write(EP0XferLen,DataSize);        // data transfer length
  SL811Write(IntStatus,INT_CLEAR);        // clear interrupt status
  SL811Write(EP0Control,DATA0_WR);  

  timeout=10;
  while(1)
  {
    do
    {                                      
      intr = SL811Read(IntStatus);          // wait for interrupt to be done
      if((intr & USB_RESET) || (intr & INSERT_REMOVE))  //leave if device is removed
        return 1;                  
              
    } while (!(intr & USB_A_DONE)); // interrupt done !!!
  
    SL811Write(IntStatus,INT_CLEAR);         // clear interrupt status
    result = SL811Read(EP0Status);           // read EP0status register
    remainder = SL811Read(EP0Counter);       // remainder value in last pkt xfer
  
    if (result & EP0_ACK)
      return 0;  
    
    if (result & EP0_NAK)                  // NAK Detected
    {                            
        SL811Write(IntStatus,INT_CLEAR);        // clear interrupt status, need to
        SL811Write(EP0Control,DATA0_WR);            // re-arm and request for last cmd, IN token
        result = 0;                                     // respond to NAK status only
    }
    
    if (result & EP0_TIMEOUT)                // TIMEOUT Detected
    {                            
        if(timeout)
        {  
            timeout--;
        }
        else
          return ERROR_TIMEOUT;                    // exit on the timeout detected  
        
        SL811Write(IntStatus,INT_CLEAR);        // clear interrupt status, need to
        SL811Write(EP0Control,DATA0_WR);            // re-arm and request for last cmd again
    }
    
    if (result & EP0_STALL)                  // STALL detected
      return ERROR_STALL;                    // for unsupported request.
    
    if (result & EP0_OVERFLOW)                // OVERFLOW detected
      return ERROR_OVERFLOW;  
    
    if (result & EP0_ERROR)                  // ERROR detected
      return ERROR_EP0_ERROR;
  }
  
  
  return ERROR_UNKNOWN;
}

int GetReply(void * pData, int DataSize)
{
  unsigned char result, intr, remainder,timeout;
  
  SL811Write(EP0Status,(PID_IN | 0));  // PID + EP address
  SL811Write(EP0Counter,0);               // USB address
  SL811Write(EP0Address,EP0_Buf);         // buffer address, start with "data0"
  SL811Write(EP0XferLen,DataSize);        // data transfer length
  SL811Write(IntStatus,INT_CLEAR);        // clear interrupt status
  SL811Write(EP0Control,DATA0_RD);  
  
  timeout=10;
  while(1)
  {
    do
    {                                      
      intr = SL811Read(IntStatus);          // wait for interrupt to be done
      if((intr & USB_RESET) || (intr & INSERT_REMOVE))  //leave if device is removed
        return 1;                  
              
    } while (!(intr & USB_A_DONE)); // interrupt done !!!
  
    SL811Write(IntStatus,INT_CLEAR);         // clear interrupt status
    result = SL811Read(EP0Status);           // read EP0status register
    remainder = SL811Read(EP0Counter);       // remainder value in last pkt xfer
  
    if (result & EP0_ACK)
    {
      if(remainder!=DataSize)              
      {
        SL811BufRead(EP0_Buf, pData, DataSize);
        return 0;
      }
    }
    
    if (result & EP0_NAK)                  // NAK Detected
    {                            
        SL811Write(IntStatus,INT_CLEAR);        // clear interrupt status, need to
        SL811Write(EP0Control,DATA0_WR);            // re-arm and request for last cmd, IN token
        result = 0;                                     // respond to NAK status only
    }
    
    if (result & EP0_TIMEOUT)                // TIMEOUT Detected
    {                            
        if(timeout)
        {  
            timeout--;
        }
        else
          return ERROR_TIMEOUT;                    // exit on the timeout detected  
        
        SL811Write(IntStatus,INT_CLEAR);        // clear interrupt status, need to
        SL811Write(EP0Control,DATA0_WR);            // re-arm and request for last cmd again
    }
    
    if (result & EP0_STALL)                  // STALL detected
      return ERROR_STALL;                    // for unsupported request.
    
    if (result & EP0_OVERFLOW)                // OVERFLOW detected
      return ERROR_OVERFLOW;  
    
    if (result & EP0_ERROR)                  // ERROR detected
      return ERROR_EP0_ERROR;
  }
  
  return ERROR_UNKNOWN;
}

unsigned char Buffer[0x64];
void testSL811(void)
{
  int error;
  SetupPKG pkg;
  pkg.bmRequest=0x80;
  pkg.bRequest=0x06;
  pkg.wValue=0x200;
  pkg.wIndex=0x00;
  pkg.wLength=0xFF00;
  
  SL811ClockInit();
  SL811_Init();
  
  error=SendData(&pkg,sizeof(pkg));
  if (!error)
  {
    error=GetReply(Buffer,0x9);  
  }

}

Код не идеальный, надо доделывать функцию чтения. Он инитит хост в режиме low-speed и позволяет вам послать SETUP пакет GET_DESCRIPTOR и вычитать 9-байтов ответа от Slave устройства. Все нехватающие функции и define есть в cy3662/EZ811 development kit'e. Его можно взять вот тут