cc1101 generating "fake" receive signals on GD0...

Hi,

I had the same issue when i started my project. Then i used the SmartRFStudio to generate offline settings. Then it is almost resolved and GDIO is 99.99% stable.

However, still it receives garbage data. But it very rare (once, twice an hour). In order to filter those data, I used software CRC check.

Thanks

Thanks for your reply.

i'm using SmartRFStudio too. But I'm using MSK modulation. What's the best modulation type for cc1101?  

Hi,

I m using GFSK because the noise immunity is high.

Thanks

Hi;

thanks for your response. I tried GFSK and nothing changed.

thanks for your help. it seems cc1101 is not reliable product.

Hi,

For me CC1101 is working perfectly other than random CRC issue...

btw, this is the settings that i m using. it may be helpful for you. those are working perfectly. 

I m suing a PCB antenna which is a TI reference design. it worked more than 100 feet easily.

CC1101 is very old product and i feel it is reliable. compared to other silicon, this is very good.

const HAL_RF_CONFIG myRfConfig = {
    0x29,  // IOCFG2              GDO2 Output Pin Configuration
    0x2E,  // IOCFG1              GDO1 Output Pin Configuration
    0x06,  // IOCFG0              GDO0 Output Pin Configuration
    0x47,  // FIFOTHR             RX FIFO and TX FIFO Thresholds
    0xD3,  // SYNC1               Sync Word, High Byte
    0x91,  // SYNC0               Sync Word, Low Byte
    0xFF,  // PKTLEN              Packet Length
    0x04,  // PKTCTRL1            Packet Automation Control
    0x45,  // PKTCTRL0            Packet Automation Control
    0x00,  // ADDR                Device Address
    0x0a,  // CHANNR              Channel Number
    0x06,  // FSCTRL1             Frequency Synthesizer Control
    0x00,  // FSCTRL0             Frequency Synthesizer Control
    0x22,  // FREQ2               Frequency Control Word, High Byte
    0xBB,  // FREQ1               Frequency Control Word, Middle Byte
    0x13,  // FREQ0               Frequency Control Word, Low Byte
    0xF5,  // MDMCFG4             Modem Configuration
    0x83,  // MDMCFG3             Modem Configuration
    0x13,  // MDMCFG2             Modem Configuration
    0x22,  // MDMCFG1             Modem Configuration
    0xF8,  // MDMCFG0             Modem Configuration
    0x31,  // DEVIATN             Modem Deviation Setting
    0x07,  // MCSM2               Main Radio Control State Machine Configuration
    0x30,  // MCSM1               Main Radio Control State Machine Configuration
    0x18,  // MCSM0               Main Radio Control State Machine Configuration
    0x16,  // FOCCFG              Frequency Offset Compensation Configuration
    0x6C,  // BSCFG               Bit Synchronization Configuration
    0x03,  // AGCCTRL2            AGC Control
    0x40,  // AGCCTRL1            AGC Control
    0x91,  // AGCCTRL0            AGC Control
    0x87,  // WOREVT1             High Byte Event0 Timeout
    0x6B,  // WOREVT0             Low Byte Event0 Timeout
    0xFB,  // WORCTRL             Wake On Radio Control
    0x56,  // FREND1              Front End RX Configuration
    0x10,  // FREND0              Front End TX Configuration
    0xE9,  // FSCAL3              Frequency Synthesizer Calibration
    0x2A,  // FSCAL2              Frequency Synthesizer Calibration
    0x00,  // FSCAL1              Frequency Synthesizer Calibration
    0x1F,  // FSCAL0              Frequency Synthesizer Calibration
    0x41,  // RCCTRL1             RC Oscillator Configuration
    0x00,  // RCCTRL0             RC Oscillator Configuration
    0x59,  // FSTEST              Frequency Synthesizer Calibration Control
    0x7F,  // PTEST               Production Test
    0x3F,  // AGCTEST             AGC Test
    0x81,  // TEST2               Various Test Settings
    0x35,  // TEST1               Various Test Settings
    0x09,  // TEST0               Various Test Settings
    0x00,  // PARTNUM             Chip ID
    0x04,  // VERSION             Chip ID
    0x00,  // FREQEST             Frequency Offset Estimate from Demodulator
    0x00,  // LQI                 Demodulator Estimate for Link Quality
    0x00,  // RSSI                Received Signal Strength Indication
    0x00,  // MARCSTATE           Main Radio Control State Machine State
    0x00,  // WORTIME1            High Byte of WOR Time
    0x00,  // WORTIME0            Low Byte of WOR Time
    0x00,  // PKTSTATUS           Current GDOx Status and Packet Status
    0x00,  // VCO_VC_DAC          Current Setting from PLL Calibration Module
    0x00,  // TXBYTES             Underflow and Number of Bytes
    0x00,  // RXBYTES             Overflow and Number of Bytes
    0x00,  // RCCTRL1_STATUS      Last RC Oscillator Calibration Result
    0x00,  // RCCTRL0_STATUS      Last RC Oscillator Calibration Result
};