char SetupCC1020RX(char RXANALOG1, char PA_POWER1)
{
volatile int TimeOutCounter;
char lock_status;
// Turn ON DCLK_CS (Carrier Sense Squelch) in RX
WriteToCC1020Register(CC1020_INTERFACE,ReadFromCC1020Register(CC1020_INTERFACE) | 0x10);
// Switch into RX, switch to freq. reg A
WriteToCC1020Register(CC1020_MAIN,0x11);
// Setup bias current adjustment
WriteToCC1020Register(CC1020_ANALOG,RXANALOG);
// Monitor LOCK
for(TimeOutCounter=30; ((ReadFromCC1020Register(CC1020_STATUS)&0x10)==0)&&(TimeOutCounter>0); TimeOutCounter--)
{
_delay_ms(1);
}
// If PLL in lock
if((ReadFromCC1020Register(CC1020_STATUS)&0x10)==0x10)
{
lock_status = TRUE;
sbi(PORTA,LED_PLL);
}
else // Recalibrate
{
// If recalibration ok
if(CalibrateCC1020(PA_POWER1))
{
lock_status = TRUE;
sbi(PORTA,LED_PLL);
// Else (recalibration failed)
}
else
{
lock_status = FALSE;
cbi(PORTA,LED_PLL);
}
}
// Switch RX part of CC1020 on // RX coming out of PD at this stage
WriteToCC1020Register(CC1020_MAIN,0x01);
// Configure LOCK pin to continuous lock status. Active low indicates PLL in lock
//WriteToCC1020Register(CC1020_LOCK,0x20);
// Configure LOCK pin to indicate carrier sense. Active low when RSSI above threshold
WriteToCC1020Register(CC1020_LOCK,0x40);
// Return LOCK status to application
return (lock_status);
}
char SetupCC1020TX(char TXANALOG1, char PA_POWER1)
{
volatile int TimeOutCounter;
int lock_status;
// Turn off PA to avoid frequency splatter
WriteToCC1020Register(CC1020_PA_POWER,0x00);
// Setup bias current adjustment
WriteToCC1020Register(CC1020_ANALOG,TXANALOG1);
// Switch into TX, switch to freq. reg B
WriteToCC1020Register(CC1020_MAIN,0xC1); // TX Coming out of Power down at this stage
// Monitor lock
// LOCK_CONTINUOUS bit set to 1 when PLL is in LOCK
for(TimeOutCounter=30; ((ReadFromCC1020Register(CC1020_STATUS)&0x10)==0x00)&&(TimeOutCounter>0); TimeOutCounter--)
{
_delay_ms(1);
}
// If PLL in lock
if((ReadFromCC1020Register(CC1020_STATUS)&0x10)==0x10)
{
lock_status = TRUE;
sbi(PORTA,LED_PLL);
}
else // if PLL is not locked then Recalibrate
{
// If recalibration ok
if(CalibrateCC1020(PA_POWER1))
{
lock_status = TRUE;
sbi(PORTA,LED_PLL);
// Else (recalibration failed)
}
else
{
lock_status = FALSE;
cbi(PORTA,LED_PLL);
}
}
// Restore PA setting
WriteToCC1020Register(CC1020_PA_POWER,PA_POWER1);
// Turn OFF DCLK_CS (Carrier Sense Squelch) in TX
WriteToCC1020Register(CC1020_INTERFACE,ReadFromCC1020Register(CC1020_INTERFACE)&~0x10);
// Configure LOCK pin to continuous lock status. Active low indicates PLL in lock
WriteToCC1020Register(CC1020_LOCK,0x20);
// Return LOCK status to application
return (lock_status);
}
int init_CC1020 (void){
//init_SPI_trans(CC1020);
SetupCC1020PD();
ResetCC1020();//CC is still in PD (Power_Down mode) after reset
SetupCC1020Allregisters();
WakeUpCC1020ToRX(RXANALOG);
CalibrateCC1020 (PA_POWER);
WakeUpCC1020ToRX(RXANALOG);
return SetupCC1020RX(RXANALOG,PA_POWER);
}
