void WakeUpCC1020ToRX(char RXANALOG1)
{
// Turn on xtal oscillator core
WriteToCC1020Register(CC1020_MAIN,0x1B);
// Setup bias current adjustment
WriteToCC1020Register(CC1020_ANALOG,RXANALOG1);
// Insert wait routine here, must wait for xtal oscillator to stabilise,
// typically takes 2-5ms.
//for (i=0x0260; i > 0; i--);
_delay_ms(3);
// Turn on bias generator
WriteToCC1020Register(CC1020_MAIN,0x19);
// Wait for 150 usec
int i;
for (i=0x0010; i > 0; i--);
//_delay_us(150);
// Turn on frequency synthesiser
WriteToCC1020Register(CC1020_MAIN,0x11);
}
void SetupCC1020PD(void)
{
// Put CC1020 into power-down
WriteToCC1020Register(CC1020_MAIN,0x1F);
// Turn off PA to minimise current draw
WriteToCC1020Register(CC1020_PA_POWER,0x00);
}
void ResetCC1020(void)
{
// Reset CC1020
WriteToCC1020Register(CC1020_MAIN, 0x0E);
// Bring CC1020 out of reset
WriteToCC1020Register(CC1020_MAIN, 0x1F);
}
void WakeUpCC1020ToTX(char TXANALOG1)
{
// Turn on xtal oscillator core
WriteToCC1020Register(CC1020_MAIN,0xDB);
// Setup bias current adjustment
WriteToCC1020Register(CC1020_ANALOG,TXANALOG1);
// Insert wait routine here, must wait for xtal oscillator to stabilise,
// typically takes 2-5ms.
//for (i=0x0260; i > 0; i--);
_delay_ms(3);
// Turn on bias generator
WriteToCC1020Register(CC1020_MAIN,0xD9);
// Wait for 150 usec
for (int i=0x0010; i > 0; i--);
//_delay_us(150); // Not possible, max delay using this function is 96us
// Turn on frequency synthesiser
WriteToCC1020Register(CC1020_MAIN,0xD1);
}
void WakeUpCC1020ToRX(char RXANALOG1)
{
// Turn on xtal oscillator core
WriteToCC1020Register(CC1020_MAIN,0x1B);
// Setup bias current adjustment
WriteToCC1020Register(CC1020_ANALOG,RXANALOG1);
// Insert wait routine here, must wait for xtal oscillator to stabilise,
// typically takes 2-5ms.
//for (i=0x0260; i > 0; i--);
_delay_ms(3);
// Turn on bias generator
WriteToCC1020Register(CC1020_MAIN,0x19);
x = ReadFromCC1020Register(CC1020_MAIN);
sprintf(arr, "Read: %x\r\n", x);
//send_UART(arr, strlen(arr));
// Wait for 150 usec
_delay_us(150);
// Turn on frequency synthesiser
WriteToCC1020Register(CC1020_MAIN,0x11);
}
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);
}
void SetupCC1020PD(void)
{
// Put CC1020 into power-down
WriteToCC1020Register(CC1020_MAIN,0x1F);
x = ReadFromCC1020Register(CC1020_MAIN);
sprintf(arr, "Read: %x\r\n", x);
//send_UART(arr, strlen(arr));
// Turn off PA to minimise current draw
WriteToCC1020Register(CC1020_PA_POWER,0x00);
}
void SetupCC1020PD(void)
{
uint8_t x;
char bufff[100];
// Put CC1020 into power-down
WriteToCC1020Register(CC1020_MAIN,0x1F);
x = ReadFromCC1020Register(CC1020_MAIN);
sprintf(bufff,"Wake up complete : %d a\r\n",x);
usart_transmit(bufff);
// Turn off PA to minimise current draw
WriteToCC1020Register(CC1020_PA_POWER,0x00);
}
int CalibrateCC1020(char PA_POWER1)
{
volatile int TimeOutCounter;
volatile int nCalAttempt;
// Turn off PA to avoid spurs during calibration in TX mode
WriteToCC1020Register(CC1020_PA_POWER,0x00);
// Calibrate, and re-calibrate if necessary:
for (nCalAttempt = CAL_ATTEMPT_MAX; (nCalAttempt>0); nCalAttempt--)
{
// Start calibration
WriteToCC1020Register(CC1020_CALIBRATE,0xB4); // verified with cc1020 datasheet
// Wait for 100 usec. As given errata notes.
for (int i=0x000B; i > 0; i--);
// Monitor calibration complete bit in STATUS register
// CAL_COMPLETE bit set to 1 when calibration is complete
// Waiting time according to register settings is approx 27ms. Ref_freq=fosc/2 and CAL_WAIT = 11
// We are waiting for 30ms
for(TimeOutCounter=30; ((ReadFromCC1020Register(CC1020_STATUS)&0x80)==0x00)&&(TimeOutCounter>0); TimeOutCounter--)
{
_delay_ms(1);
}
// Monitor lock
// LOCK_CONTINUOUS bit in STATUS register is set to 1 when PLL is in LOCK
for(TimeOutCounter=30; ((ReadFromCC1020Register(CC1020_STATUS)&0x10)==0x00)&&(TimeOutCounter>0); TimeOutCounter--)
{
_delay_ms(1);
}
// Abort further recalibration attempts if successful LOCK
if((ReadFromCC1020Register(CC1020_STATUS)&0x10) == 0x10)
{
break;
}
}
// Restore PA setting
WriteToCC1020Register(CC1020_PA_POWER, PA_POWER1);
// Return state of LOCK_CONTINUOUS bit
return ((ReadFromCC1020Register(CC1020_STATUS)&0x10)==0x10);
}
void SetupCC1020Allregisters(void)
{
char counter, value;
for(counter = 0x01; counter <= 0x20; counter++)
{
value = DefaultConfig433[counter - 1]; // For Transmitter as well as Receiver
WriteToCC1020Register(counter, value);
}
}
void WakeUpCC1020ToTX(char TXANALOG1)
{
// Turn on xtal oscillator core
WriteToCC1020Register(CC1020_MAIN,0xDB);
// Setup bias current adjustment
WriteToCC1020Register(CC1020_ANALOG,TXANALOG1);
// Insert wait routine here, must wait for xtal oscillator to stabilise,
// typically takes 2-5ms.
_delay_ms(3);
// Turn on bias generator
WriteToCC1020Register(CC1020_MAIN,0xD9);
// Wait for 150 usec
_delay_us(150);
// Turn on frequency synthesiser
WriteToCC1020Register(CC1020_MAIN,0xD1);
}
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);
}
