请教关于C8051F040+CP2200的问题总是发现自动协商失败

wangjian801213 2008-8-25 16:21 楼主

我自己划的板子由C8051F040和CP2200组成使用PM34-1006变压器进行输入网络信号  发现程序初始化没有问题但是CP2200时钟无法完成自动协商

我曾经买了块C8051F020的网络开发板使用Silabs成功使用了UDP通信所以我把CP2201的四根网络输入线直接接上了自己划板子的CP2200 还是没有反应(因为这样连接可能有问题)

所以还是期待变压器的正确连接虽然排除不了本身程序的问题但是直觉还是信号没有进来  我把CP2200的底层驱动帖出来希望大家帮帮忙!
unsigned char CP2200_HW_Reset(void)
{
char SFRPAGE_SAVE = SFRPAGE;
data unsigned char temp_char;

CP2200_RST_Low();//将cp2200的复位脚置低

wait_ms(20);

//--------------------------------------------------------------------------
// Step 1: Wait for the reset pin to rise.
//--------------------------------------------------------------------------
CP2200_RST_High();//将cp2200的复位脚置高

//--------------------------------------------------------------------------
// Step 2 + 3: Wait for oscillator and self initializaion to complete
//--------------------------------------------------------------------------

wait_ms(5000);
/* wait for OSC Init interrupt */
while(INT_PIN)
{
}

// INT0 is not reading 0xFF;
wait_ms(1000);
while(((temp_char & 0x30) != 0x30) || (temp_char == 0xFF))
{
   temp_char = INT0RD;
}

// Verify communication

if(RXHASHH != 0x04)
{
   return MEM_ERROR;
}

// Read and write the RAM at 0x7FF in the transmit buffer
// we can verify the send/rev buffer normal
RAMADDRH = 0x07;
RAMADDRL = 0xFF;

RAMTXDATA = 0x00;

if(RAMTXDATA != 0x00)
{
   return MEM_ERROR;
}

RAMTXDATA = 0xFF;

if(RAMTXDATA != 0xFF)
{
   return MEM_ERROR;
}

/* Init has completed */

//--------------------------------------------------------------------------
// Step 4: Disable Interrupts For Events that will not be monitored
//--------------------------------------------------------------------------

// Disable All Interrupts except for the packet received interrupt
INT0EN = 0x03;    //关中断允许接收缓冲区满和数据包已接收中断

INT1EN = 0x00;

// Clear all Interrupt Flags by reading the self-clearing status registers
temp_char = INT0;
temp_char = INT1;

SFRPAGE = SFRPAGE_SAVE;

debug_ledDn = 1;

return 0;

}

unsigned char PHY_Init()
{
char SFRPAGE_SAVE = SFRPAGE;
unsigned char temp_char;
unsigned char retval = 0;
unsigned char i = 0;

// Step 1: Disable the PHY
PHYCN = 0x00;  //禁止phy

// Step 2: Enable the PHY with link integrity test and auto-negotiation
// turned off

// A. Disable the Transmitter Power Save Option and Configure Options
TXPWR = 0x80;

PHYCF = ( SMSQ | JABBER | ADPAUSE | AUTOPOL);//配置phy工作方式    enable auto-negotiate

// B. Enable the Physical Layer
PHYCN = PHYEN;//允许phy

wait_ms(10);

PHYCN = ( PHYEN | TXEN | RXEN );

wait_ms(2000);
// Step 3: Poll the Wake-on-Lan Interrupt

// A. Clear Interrupt Flags
temp_char = INT1;//清除中断标志

// C. Check for a signal
for(i = 0 ; i < 150; i++)
{
   wait_ms(10);

   temp_char = INT1RD;
   // If a signal is detected, wait 250 ms, then continue
   if(temp_char & WAKEINT)
   {
      wait_ms(250);

   debug_ledUp = 0;
      break;
   }
}

//--------------------------------------------------------------------------
// Physical Layer Initialization (Section 15.7 of CP220x Datasheet)
//--------------------------------------------------------------------------
// Step 1: Synchronization procedure implemented above

// Step 2: Disable the physical layer
PHYCN = 0x00;

// Step 3: Configure the desired physical layer options including
// auto-negotiation and link integrity
PHYCF = ( SMSQ | LINKINTG | JABBER | AUTONEG | ADPAUSE | AUTOPOL );

// Step 4: Enable the physcial layer

// A. Enable the Physical Layer
   PHYCN = PHYEN;

// B. Wait for the physical layer to power up
   wait_ms(10);

// C. Enable the Transmitter and Receiver
// Auto-negotiation begins now
   PHYCN = ( PHYEN | TXEN | RXEN );


// Step 5: Wait for auto-negotiation to complete

// Clear INT1 Interrupt Flags
   temp_char = INT1;

   // Check for autonegotiation fail or complete flag
   for(i = 0; i < 60; i++)
   {
      wait_ms(100);
      temp_char = INT1RD;

      // If Auto-Negotiation Completes/Fails, break
      if(temp_char & (ANCINT | ANFINT))
   {
         break;
      }
   }

   // Mask out all bits except for auto negotiation bits
   temp_char = INT1RD;          //中断状态寄存器1
   temp_char &= (ANCINT | ANFINT);  //0x01 | 0x04 = 0x05    与后仅仅观察自动协商的标志位

   // Check if Auto-Negotiation has FAILED
   if(temp_char & ANFINT)
   {       //自动协商失败

      // Auto-Negotiation has failed
      retval = LINK_ERROR;

   }
   else if(temp_char == ANCINT)    // Check if Auto-Negotiation has PASSED
   {

      // Auto-Negotiation has passed
      retval = 0;

   }
   else
   {
      retval = LINK_ERROR;
   }

SFRPAGE = SFRPAGE_SAVE;
return retval;
}