📄 armspi.c
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{
MRcvBuffer[0] &= 0x0f; // mask out upper nibble
if ((MRcvBuffer[0] & 0x0a) == 0)
{
status = MI_NOTAUTHERR;
}
else
{
status = MI_CODEERR;
}
}
}
memcpy1(_data,_16ge0,16); // in case of an error initialise
// data
}
else // Response Processing
{
if (MInfo.nBytesReceived != 16)
{
status = MI_BYTECOUNTERR;
memcpy1(_data,_16ge0,16);
}
else
{
memcpy1(_data,(uint8*)MRcvBuffer,16);
}
}
FM1702PcdSetTmo(1); // short timeout
return status;
}
///////////////////////////////////////////////////////////////////////
// M I F A R E W R I T E
///////////////////////////////////////////////////////////////////////
int8 FM1702PiccWrite( uint8 block,uint8 *_data)
{
int8 rtcrc,status = MI_OK;
// ************* Cmd Sequence **********************************
ResetInfo(MInfo);
MSndBuffer[0] = PICC_WRITE; // Write command code
MSndBuffer[1] = block;
MInfo.nBytesToSend = 2;
rtcrc=ReadIO(RegChannelRedundancy);
WriteIO(RegChannelRedundancy,0x07);
status = FM1702PcdCmd(PCD_TRANSCEIVE,MSndBuffer,MRcvBuffer, &MInfo);
if (status != MI_NOTAGERR) // no timeout error
{
if (MInfo.nBitsReceived != 4) // 4 bits are necessary
{
status = MI_BITCOUNTERR;
}
else // 4 bit received
{
MRcvBuffer[0] &= 0x0f; // mask out upper nibble
if ((MRcvBuffer[0] & 0x0a) == 0)
{
status = MI_NOTAUTHERR;
}
else
{
if (MRcvBuffer[0] == 0x0a)
{
status = MI_OK;
}
else
{
status = MI_CODEERR;
}
}
}
}
if ( status == MI_OK)
{
FM1702PcdSetTmo(3); // long timeout
ResetInfo(MInfo);
memcpy1((uint8*)MSndBuffer,_data,16);
MInfo.nBytesToSend = 16;
status = FM1702PcdCmd(PCD_TRANSCEIVE, MSndBuffer, MRcvBuffer, &MInfo);
WriteIO(RegChannelRedundancy,rtcrc);
if (status & 0x80) // timeout occured
{
status = MI_NOTAGERR;
}
else
{
if (MInfo.nBitsReceived != 4) // 4 bits are necessary
{
status = MI_BITCOUNTERR;
}
else // 4 bit received
{
MRcvBuffer[0] &= 0x0f; // mask out upper nibble
if ((MRcvBuffer[0] & 0x0a) == 0)
{
status = MI_WRITEERR;
}
else
{
if (MRcvBuffer[0] == 0x0a)
{
status = MI_OK;
}
else
{
status = MI_CODEERR;
}
}
}
}
FM1702PcdSetTmo(1); // short timeout
}
WriteIO(RegChannelRedundancy, rtcrc);
return status;
}
///////////////////////////////////////////////////////////////////////
// V A L U E M A N I P U L A T I O N
///////////////////////////////////////////////////////////////////////
int8 FM1702PiccValue(uint8 dd_mode,uint8 addr,uint8 *value, uint8 trans_addr)
{
int8 rtcrc,status = MI_OK;
FM1702PcdSetTmo(1); // short timeout
// ************* Cmd Sequence **********************************
ResetInfo(MInfo);
MSndBuffer[0] = dd_mode; // Inc,Dec command code
MSndBuffer[1] = addr;
MInfo.nBytesToSend = 2;
rtcrc=ReadIO(RegChannelRedundancy);
WriteIO(RegChannelRedundancy,0x07);
status = FM1702PcdCmd(PCD_TRANSCEIVE,MSndBuffer,MRcvBuffer,&MInfo);
if (status != MI_NOTAGERR) // no timeout error
{
if (MInfo.nBitsReceived != 4) // 4 bits are necessary
{
status = MI_BITCOUNTERR;
}
else // 4 bit received
{
MRcvBuffer[0] &= 0x0f; // mask out upper nibble
switch(MRcvBuffer[0])
{
case 0x00:
status = MI_NOTAUTHERR;
break;
case 0x0a:
status = MI_OK;
break;
case 0x01:
status = MI_VALERR;
break;
default:
status = MI_CODEERR;
break;
}
}
}
if ( status == MI_OK)
{
FM1702PcdSetTmo(3); // long timeout
ResetInfo(MInfo);
memcpy1((uint8*)MSndBuffer,value,4);
MInfo.nBytesToSend = 4;
status = FM1702PcdCmd(PCD_TRANSCEIVE, MSndBuffer, MRcvBuffer,&MInfo);
if (status == MI_OK) // no timeout occured
{
if (MInfo.nBitsReceived != 4) // 4 bits are necessary
{
status = MI_BITCOUNTERR;
}
else // 4 bit received
{
MRcvBuffer[0] &= 0x0f; // mask out upper nibble
switch(MRcvBuffer[0])
{
case 0x00:
status = MI_NOTAUTHERR;
break;
case 0x01:
status = MI_VALERR;
break;
default:
status = MI_CODEERR;
break;
}
}
}
else
if (status == MI_NOTAGERR )
status = MI_OK; // no response after 4 byte value -
// transfer command has to follow
}
if ( status == MI_OK)
{
ResetInfo(MInfo);
MSndBuffer[0] = PICC_TRANSFER; // transfer command code
MSndBuffer[1] = trans_addr;
MInfo.nBytesToSend = 2;
status = FM1702PcdCmd(PCD_TRANSCEIVE,MSndBuffer, MRcvBuffer, &MInfo);
if (status != MI_NOTAGERR) // timeout occured
{
if (MInfo.nBitsReceived != 4) // 4 bits are necessary
{
status = MI_BITCOUNTERR;
}
else // 4 bit received
{
MRcvBuffer[0] &= 0x0f; // mask out upper nibble
switch(MRcvBuffer[0])
{
case 0x00:
status = MI_NOTAUTHERR;
break;
case 0x0a:
status = MI_OK;
break;
case 0x01:
status = MI_VALERR;
break;
default:
status = MI_CODEERR;
break;
}
}
}
}
WriteIO(RegChannelRedundancy,rtcrc);
return status;
}
///////////////////////////////////////////////////////////////////////
// M I F A R E H A L T
///////////////////////////////////////////////////////////////////////
int8 FM1702PiccHalt(void)
{
int8 status = MI_CODEERR;
// ************* Cmd Sequence **********************************
ResetInfo(MInfo);
MSndBuffer[0] = PICC_HALT ; // Halt command code
MSndBuffer[1] = 0x00; // dummy address
MInfo.nBytesToSend = 2;
status = FM1702PcdCmd(PCD_TRANSCEIVE, MSndBuffer, MRcvBuffer,&MInfo);
if (status)
{
// timeout error ==> no NAK received ==> OK
if (status == MI_NOTAGERR || status == MI_ACCESSTIMEOUT)
status = MI_OK;
}
//reset command register - no response from tag
WriteIO(RegCommand,PCD_IDLE);
return status;
}
//////////////////////////////////////////////////////////////////////
// M I F A R E R E S E T
///////////////////////////////////////////////////////////////////////
int8 FM1702PcdRfReset(uint32 ms)
{
int8 status = MI_OK;
if(ms)
{
ClearBitMask(RegTxControl,0x03); // Tx2RF-En, Tx1RF-En disablen
delay_50us(ms*20); // Delay for 1 ms
SetBitMask(RegTxControl,0x03); // Tx2RF-En, Tx1RF-En enable
}
else
ClearBitMask(RegTxControl,0x03); // Tx2RF-En, Tx1RF-En disablen
return status;
}
/*---------------------------------------------------------------------
// C O N F I G M F O U T S E L E C T
---------------------------------------------------------------------*/
int8 FM1702PcdMfOutSelect(uint8 type)
{
WriteIO(RegMfOutSelect,type&0x07);
return MI_OK;
}
/*----------------------------------------------------------------------------
函数：延时函数
-----------------------------------------------------------------------------*/
void delay_50us(uint32 _50us)
{
uint32 i;
for(i=0;i<5*_50us;i++);
}
//----------------------------------------------------------------------------
// FUNCTION: start_timeout
//----------------------------------------------------------------------------
void start_timeout(uint32 _50us)
{
VICIntEnClr|=(1<<5);
T1TCR=0;
T1TC=0;
T1MR0=DELAY50 * _50us;
T1MCR=5;
Timer1out_flag = 0;
T1TCR=1;
VICIntEnable|=(1<<5);
}
//----------------------------------------------------------------------------
// FUNCTION: stop_timeout
//----------------------------------------------------------------------------
void stop_timeout(void)
{
VICIntEnClr|=(1<<5);//关Timer1中断
//T1IR=T1IR|0X01; //清中断
T1TCR=0; //关闭定时器1
}
///////////////////////////////////////////////////////////////////////////////
// Interrupt Handler TIMER1
///////////////////////////////////////////////////////////////////////////////
void TIMER1_Exception (void)
{
Timer1out_flag = 1; // Set timeout state
T1TCR=0; //关闭定时器1
T1IR=T1IR|0x01; //清中断
VICVectAddr=0;
}
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