uint16_t Readout7705( uint8_t ChannelSelect )
{
uint8_t state, ResultH, ResultL;
BOOL isReady;
uint16_t iRetry;
for ( iRetry = 20u; iRetry; --iRetry )
{
ShiftOut( RS_0 + READ + ChannelSelect );
state = ShiftIn();
isReady = ( state & DRDY ) ? FALSE : TRUE; // DRDY 低电平有效
if ( isReady )
{
ShiftOut( RS_3 + READ + ChannelSelect ); // do Read
ResultH = ShiftIn();
ResultL = ShiftIn();
return ( ResultL + ( ResultH * 256u ));
}
delay( 10u );
}
return 0u; // failure !!!
}
BOOL Initialize7705( )
{
uint8_t i;
bus_SPI1xPortInit();
for( i = 7u; i != 0u; --i )
{
ShiftOut( 0xFFu );
}
ShiftOut( RS_4 ); // Test Register, 8 Bits
ShiftOut( 0x00u ); // Default: 0x00
ShiftOut( RS_2 ); // Clock Register, 8 Bits
ShiftOut( CLKDIV + FS_1_0 ); // 50Hz @ 4.9152MHz
ShiftOut( RS_1 + 0u ); // 启动指定通道的自校准转换
ShiftOut( MD_1 + BIPOLAR + G_5 + BUF );
delay( 300u );
ShiftOut( RS_1 + 1u ); // 启动指定通道的自校准转换
ShiftOut( MD_1 + BIPOLAR + G_4 + BUF );
delay( 300u);
return TRUE;
}
void Convert7705( uint8_t ChannelSelect )
{
ShiftOut( RS_1 + ChannelSelect ); // 启动指定通道的校准转换
if( 0u == ChannelSelect )
{
ShiftOut( MD_0 + BIPOLAR + G_5 + BUF );
}
else
{
ShiftOut( MD_0 + BIPOLAR + G_4 + BUF );
}
ShiftOut( RS_3 + READ + ChannelSelect ); // Reset DRDY#
ShiftIn();
ShiftIn();
}
int main(void){
ADCInitChar();
DDRB |= (1<<2)|(1<<0)|(1<<1);
char Temp;
float Hold;
float Read;
while(1){
Read = ADCReadChar(2);
Hold = (((Read / 100.) - .75 ) * 100.) + 25;
Temp = (char)(Hold);
PORTB &= ~(1<<1);
ShiftOut(2, 0, Temp);
PORTB |= (1<<1);
}
}
void TD_Poll(void) // Called repeatedly while the device is idle
{
if(!Running) return;
if(!(EP1INCS & bmEPBUSY))
{
if(Pending > 0)
{
BYTE o, n;
AUTOPTRH2 = MSB( EP1INBUF );
AUTOPTRL2 = LSB( EP1INBUF );
XAUTODAT2 = 0x31;
XAUTODAT2 = 0x60;
if(Pending > 0x3E) { n = 0x3E; Pending -= n; }
else { n = Pending; Pending = 0; };
o = n;
#ifdef USE_MOD256_OUTBUFFER
AUTOPTR1H = MSB( OutBuffer );
AUTOPTR1L = FirstDataInOutBuffer;
while(n--)
{
XAUTODAT2 = XAUTODAT1;
AUTOPTR1H = MSB( OutBuffer ); // Stay within 256-Byte-Buffer
};
FirstDataInOutBuffer = AUTOPTR1L;
#else
AUTOPTR1H = MSB( &(OutBuffer[FirstDataInOutBuffer]) );
AUTOPTR1L = LSB( &(OutBuffer[FirstDataInOutBuffer]) );
while(n--)
{
XAUTODAT2 = XAUTODAT1;
if(++FirstDataInOutBuffer >= OUTBUFFER_LEN)
{
FirstDataInOutBuffer = 0;
AUTOPTR1H = MSB( OutBuffer );
AUTOPTR1L = LSB( OutBuffer );
};
};
#endif
SYNCDELAY;
EP1INBC = 2 + o;
TF2 = 1; // Make sure there will be a short transfer soon
}
else if(TF2)
{
EP1INBUF[0] = 0x31;
EP1INBUF[1] = 0x60;
SYNCDELAY;
EP1INBC = 2;
TF2 = 0;
};
};
if(!(EP2468STAT & bmEP2EMPTY) && (Pending < OUTBUFFER_LEN-0x3F))
{
BYTE i, n = EP2BCL;
AUTOPTR1H = MSB( EP2FIFOBUF );
AUTOPTR1L = LSB( EP2FIFOBUF );
for(i=0;i<n;)
{
if(ClockBytes > 0)
{
BYTE m;
m = n-i;
if(ClockBytes < m) m = ClockBytes;
ClockBytes -= m;
i += m;
if(WriteOnly) /* Shift out 8 bits from d */
{
while(m--) ShiftOut(XAUTODAT1);
}
else /* Shift in 8 bits at the other end */
{
while(m--) OutputByte(ShiftInOut(XAUTODAT1));
}
}
else
{
BYTE d = XAUTODAT1;
WriteOnly = (d & bmBIT6) ? FALSE : TRUE;
if(d & bmBIT7)
{
/* Prepare byte transfer, do nothing else yet */
ClockBytes = d & 0x3F;
}
else
{
/* Set state of output pins */
TCK = (d & bmBIT0) ? 1 : 0;
TMS = (d & bmBIT1) ? 1 : 0;
TDI = (d & bmBIT4) ? 1 : 0;
/* Optionally read state of input pins and put it in output buffer */
if(!WriteOnly) OutputByte(2|TDO);
};
i++;
};
};
SYNCDELAY;
EP2BCL = 0x80; // Re-arm endpoint 2
};
}
