CP2201问题

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CP2201问题 [复制链接]

各位好 我用8051和CP2201做了个以太网接口 在CP2201物理层初始化过程中 不管有没有连接 INT1RD的值总为0X31 不知道问题出在什么地方 希望高手能指点下 初始化程序如下 unsigned char PHY_Init() { unsigned char temp_char; unsigned char retval = 0; //-------------------------------------------------------------------------- // Auto-Negotiation Synchronization (Section 15.2 of CP220x Datasheet) //-------------------------------------------------------------------------- // Step 1: Disable the PHY PHYCN = 0x00; // 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 ); // B. Enable the Physical Layer PHYCN = PHYEN; Delay1ms(200); Delay1ms(200); Delay1ms(200); // C. Wait for the physical layer to power up // wait_ms(10); // D. Enable the Transmitter and Receiver PHYCN = ( PHYEN | PHYTXEN | PHYRXEN ); // Step 3: Poll the Wake-on-Lan Interrupt Delay1ms(200); Delay1ms(200); Delay1ms(200); Delay1ms(200); Delay1ms(200); Delay1ms(200); Delay1ms(200); Delay1ms(200); Delay1ms(200); // A. Clear Interrupt Flags temp_char = INT1; // B. Start a new timeout for 1.5 seconds // reset_timeout(ONE_SECOND+ONE_SECOND/2); // C. Check for a signal // If no signal is deteced, wait 1.5s, then continue // if(timeout_expired()){ // 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; Delay1ms(200); Delay1ms(200); Delay1ms(200); // B. Wait for the physical layer to power up // wait_ms(10); // C. Enable the Transmitter and Receiver // Auto-negotiation begins now PHYCN = ( PHYEN | PHYTXEN | PHYRXEN ); // Step 5: Wait for auto-negotiation to complete // Clear INT1 Interrupt Flags temp_char = INT1; Delay1ms(200); Delay1ms(200); Delay1ms(200); Delay1ms(200); Delay1ms(200); Delay1ms(200); Delay1ms(200); Delay1ms(200); // Delay1ms(200); // Start a six second timeout // reset_timeout(6*ONE_SECOND); // Check for autonegotiation fail or complete flag while(1){ // If Auto-Negotiation Completes/Fails, break if(INT1RD & (ANCINT | ANFINT)){ printf ("\nINT0RD=%.2x \n",(unsigned int)INT0RD); printf ("\nINT1RD=%.2x \n",(unsigned int)INT1RD); printf ("\nINT1RD=%.2x \n",(unsigned int)INT1RD); break; } } // Mask out all bits except for auto negotiation bits temp_char = INT1RD; temp_char &= (ANCINT | ANFINT); // Check if Auto-Negotiation has FAILED if(temp_char & ANFINT){ // Auto-Negotiation has failed retval = LINK_ERROR; } else // Check if Auto-Negotiation has PASSED if(temp_char == ANCINT){ // Auto-Negotiation has passed retval = 0; // Enable Link LED and Activity LED // IOPWR = 0x0C; } else // Timeout Occured. { // Timeout retval = LINK_ERROR; } return retval; }

njlianjian

不好意思 没做过这个 帮不上忙了