Hello
I'm using CC1101 and need a procedure to validate result that come from reading of RSSI Register.
Something like follow:
1) set tx power to 0dBm
2) transmit packet every 100mS
3) read RSSI from register. You should read:
1m RSSI should be between 70 and 80 dBm
10m RSSI should be between 50 and 60 dBm
ecc...
Thanks
Hello
First Problem: read RSSI
byte CC1101::Power_Level_on_Channel()
{ byte rssi_dec=0; byte rssi_dBm=0; rssi_dec = Read_Status_Register(CC1101_RSSI); if (rssi_dec >= 128) { rssi_dBm = (int)((int)( rssi_dec - 256) / 2) - 74; } else { rssi_dBm = (rssi_dec / 2) - 74; } return rssi_dBm; }
where Read_Status_Register is:
byte CC1101::Read_Status_Register(byte addr)
{
byte value, temp;
temp = addr | READ_BURST;
digitalWrite(SS_PIN, LOW);
while (digitalRead(MISO_PIN));
SpiTransfer(temp);
value = SpiTransfer(0);
digitalWrite(SS_PIN, HIGH);
return value;
}
Another device transmit on 868MHz:
My code return alway 228 also when I remove the above transmitter. Why??
Second problem: Power Down:
void XOME_CC1101::power_Down()
{
cmdStrobe(CC1101_SIDLE);
cmdStrobe(CC1101_SPWD);
}
where cmdStrobe is:
void XOME_CC1101::cmdStrobe(byte strobe)
{
digitalWrite(SS_PIN, LOW);
while (digitalRead(MISO_PIN));
SpiTransfer(strobe);
digitalWrite(SS_PIN, HIGH);
}
On power supply always see the same current. No drop current happen when power_Down command is sent. Why?
void setup()
{
xome_cc1101.Initialize();
}
void loop()
{
delay(500);
xome_cc1101.power_Down();
delay(100);
xome_cc1101.Power_Level_on_Channel();
delay(500);
}
where xome_cc1101.Initialize() is:
void XOME_CC1101::Initialize(void)
{
//Inizializzo la SPI e GDO
Initialize_SPI_e_GDO();
//Preparo il pin per effettuare il Power_on_Reset
digitalWrite(SS_PIN, HIGH);
digitalWrite(SCK_PIN, HIGH);
digitalWrite(MOSI_PIN, LOW);
//Resetto il chip e lo pongo in IDLE
Power_on_Reset();
//Configuro i registri GENERALI
Configure_all_Register(); (1.2Kbaud optimized for consumer)
}
PANORAMIC: xome_cc1101.power_Down() and xome_cc1101.Power_Level_on_Channel()
ZOOM POWER DOWN
PANORAMIC SLEEP:
ZOOM SLEEP:
Hello
My MCSM1.RXOFF_MODE = 0 so it is normal to call setReceive again.
My previous trouble was about the need to call it just after entered in CC1101_Data_Received() (it is an ISR triggered by GDO_0 pin).
I resolved setting only a flag and do all other operation in main Loop.
The last 2 command to validate are always RSSI and CCA mode:
Why Transmitter send packet every 2 second but channel is always busy?
Are RSSI value plausible?
void loop()
{
if (xome_cc1101.is_Channel_Clear())
{
Serial.println("CH FREE");
Serial.print("Power= ");Serial.println(xome_cc1101.Power_Level_on_Channel());
}
else
{
Serial.println("CH DUTY");
Serial.print("Power= ");Serial.println(xome_cc1101.Power_Level_on_Channel());
}
delay(200);
}
where:
byte XOME_CC1101::Power_Level_on_Channel(){
byte rssi_dec=0;
byte rssi_dBm=0;
rssi_dec = Read_Status_Register(CC1101_RSSI);
if (rssi_dec >= 128)
{
rssi_dBm = (int)((int)( rssi_dec - 256) / 2) - 74;
}
else
{
rssi_dBm = (rssi_dec / 2) - 74;
}
return rssi_dBm;
}
and
bool XOME_CC1101::is_Channel_Clear(){
cmdStrobe(CC1101_SRX);
while (Read_Status_Register(CC1101_MARCSTATE)!=0x0D);
______________DEBUG_Stato_Interno
delayMicroseconds(500);
cmdStrobe(CC1101_STX);
delay(1);
______________DEBUG_Stato_Interno
if (Read_Status_Register(CC1101_MARCSTATE)==0x13) return false;
if (Read_Status_Register(CC1101_MARCSTATE)!=0x0D) return true;
cmdStrobe(CC1101_SRX);
______________DEBUG_Stato_Interno
}
This is debug output: (10 VALUE=140 3 VALUE= 160)
CH BUSY Power= 166 Stato=RX RX Stato=RX RX Stato=RX RX CH BUSY Power= 168 Stato=RX RX Stato=RX RX Stato=RX RX CH BUSY Power= 168 Stato=RX RX Stato=TX TX CH BUSY Power= 141 Stato=RX RX Stato=RX RX Stato=RX RX CH BUSY Power= 146 Stato=RX RX Stato=TX TX CH BUSY Power= 145 Stato=RX RX Stato=RX RX Stato=RX RX CH BUSY Power= 145 Stato=RX RX Stato=TX TX CH BUSY Power= 142 Stato=RX RX Stato=RX RX Stato=RX RX CH BUSY Power= 146 Stato=RX RX Stato=TX TX CH BUSY Power= 139 Stato=RX RX Stato=RX RX Stato=RX RX CH BUSY Power= 143 Stato=RX RX Stato=TX TX CH BUSY Power= 142 Stato=RX RX Stato=RX RX Stato=RX RX CH BUSY Power= 166 Stato=RX RX Stato=RX RX Stato=RX RX CH BUSY Power= 168 Stato=RX RX Stato=RX RX Stato=RX RX CH BUSY Power= 168 Stato=RX RX Stato=RX RX Stato=RX RX CH BUSY Power= 146 Stato=RX RX Stato=TX TX CH BUSY Power= 147 Stato=RX RX Stato=RX RX Stato=RX RX CH BUSY Power= 144 Stato=RX RX Stato=TX TX
CH BUSY Power= 144 Stato=RX RX Stato=TX TX CH BUSY Power= 145 Stato=RX RX Stato=RX RX Stato=RX RX CH BUSY Power= 144 Stato=RX RX Stato=TX TX CH BUSY Power= 144 Stato=RX RX Stato=RX RX Stato=RX RX
this is signal take ad 60cm distance:
Transmitter and Receive are at 5cm of distance
And for last this are my register
#define VALORE_REGISTRO_IOCFG2 0x29 #define VALORE_REGISTRO_IOCFG1 0x2E #define VALORE_REGISTRO_IOCFG0 0x06 #define VALORE_REGISTRO_FIFOTHR 0x47 #define VALORE_REGISTRO_SYNC1 0xD3 //setto un valore predefinito #define VALORE_REGISTRO_SYNC0 0x91 //setto un valore predefinito #define VALORE_REGISTRO_PKTLEN 0xFF #define VALORE_REGISTRO_PKTCTRL1 0x04 #define VALORE_REGISTRO_PKTCTRL0 0x05 #define VALORE_REGISTRO_ADDR 0x00 //parto con address zero #define VALORE_REGISTRO_CHANNR 0x00 //parto con canale zero #define VALORE_REGISTRO_FSCTRL1 0x06 #define VALORE_REGISTRO_FSCTRL0 0x00 #define VALORE_REGISTRO_FREQ2_868 0x21 // Frequency Control Word, High Byte #define VALORE_REGISTRO_FREQ1_868 0x62 // Frequency Control Word, Middle Byte #define VALORE_REGISTRO_FREQ0_868 0x76 // Frequency Control Word, Low Byte #define VALORE_REGISTRO_MDMCFG4 0xF5 #define VALORE_REGISTRO_MDMCFG3 0x83 #define VALORE_REGISTRO_MDMCFG2 0x93 #define VALORE_REGISTRO_MDMCFG1 0x22 #define VALORE_REGISTRO_MDMCFG0 0xF8 #define VALORE_REGISTRO_DEVIATN 0x15 #define VALORE_REGISTRO_MCSM2 0x07 #define VALORE_REGISTRO_MCSM1 0x30 #define VALORE_REGISTRO_MCSM0 0x18 #define VALORE_REGISTRO_FOCCFG 0x16 #define VALORE_REGISTRO_BSCFG 0x6C #define VALORE_REGISTRO_AGCCTRL2 0x03 #define VALORE_REGISTRO_AGCCTRL1 0x40 #define VALORE_REGISTRO_AGCCTRL0 0x91 #define VALORE_REGISTRO_WOREVT1 0x87 #define VALORE_REGISTRO_WOREVT0 0x6B #define VALORE_REGISTRO_WORCTRL 0xFB #define VALORE_REGISTRO_FREND1 0x56 #define VALORE_REGISTRO_FREND0 0x10 #define VALORE_REGISTRO_FSCAL3 0xE9 #define VALORE_REGISTRO_FSCAL2 0x2A #define VALORE_REGISTRO_FSCAL1 0x00 #define VALORE_REGISTRO_FSCAL0 0x1F #define VALORE_REGISTRO_RCCTRL1 0x41 #define VALORE_REGISTRO_RCCTRL0 0x00 #define VALORE_REGISTRO_FSTEST 0x59 #define VALORE_REGISTRO_PTEST 0x7F #define VALORE_REGISTRO_AGCTEST 0x3F #define VALORE_REGISTRO_TEST2 0x81 #define VALORE_REGISTRO_TEST1 0x35 #define VALORE_REGISTRO_TEST0 0x09
Hi TER
The two device RX and TX are the same. this is value raw of RSSI:
State=RX RX rssi_dec= 176 rssi in dBm= -114 This is the TX only:
this is RX without TX:
This is TX close to RX
Also moving TX little bit more far NOTHING CHANGE
Please reply me asap. with solution. Thanks