d_armcomm.r

来自「乐高机器人的源码,开发平台是IAR_for_AVR.」· R 代码 · 共 46 行

//
// Programmer      
//
// Date init       14.12.2004
//
// Reviser         $Author:: Dktochpe                                        $
//
// Revision date   $Date:: 28-10-05 13:46                                    $
//
// Filename        $Workfile:: d_armcomm.r                                   $
//
// Version         $Revision:: 15                                            $
//
// Archive         $Archive:: /LMS2006/Sys01/Ioctrl/Firmware/Source/d_armcom $
//
// Platform        C
//

#ifdef    ATMEGAX8

/****************************************************************************
  TWI State codes
****************************************************************************/

#define TWI_START                  0x08  // START has been transmitted  
#define TWI_REP_START              0x10  // Repeated START has been transmitted
#define TWI_ARB_LOST               0x38  // Arbitration lost

// TWI Master Transmitter staus codes                      
#define TWI_MTX_ADR_ACK            0x18  // SLA+W has been tramsmitted and ACK received
#define TWI_MTX_ADR_NACK           0x20  // SLA+W has been tramsmitted and NACK received 
#define TWI_MTX_DATA_ACK           0x28  // Data byte has been tramsmitted and ACK received
#define TWI_MTX_DATA_NACK          0x30  // Data byte has been tramsmitted and NACK received 

// TWI Master Receiver staus codes  
#define TWI_MRX_ADR_ACK            0x40  // SLA+R has been tramsmitted and ACK received
#define TWI_MRX_ADR_NACK           0x48  // SLA+R has been tramsmitted and NACK received
#define TWI_MRX_DATA_ACK           0x50  // Data byte has been received and ACK tramsmitted
#define TWI_MRX_DATA_NACK          0x58  // Data byte has been received and NACK tramsmitted

// TWI Slave Transmitter staus codes
#define TWI_STX_ADR_ACK            0xA8  // Own SLA+R has been received; ACK has been returned
#define TWI_STX_ADR_ACK_M_ARB_LOST 0xB0  // Arbitration lost in SLA+R/W as Master; own SLA+R has been received; ACK has been returned
#define TWI_STX_DATA_ACK           0xB8  // Data byte in TWDR has been transmitted; ACK has been received
#define TWI_STX_DATA_NACK          0xC0  // Data byte in TWDR has been transmitted; NOT ACK has been received
#define TWI_STX_DATA_ACK_LAST_BYTE 0xC8  // Last data byte in TWDR has been transmitted (TWEA =