Other Parts Discussed in Thread: CC1100E,
This is the register configuration generated by SmartRF Studio.
// Address Config = No address check
// Bit Rate = 1.2
// Carrier Frequency = 434.000000
// Deviation = 3.997803
// Device Address = 0
// Manchester Enable = false
// Modulation Format = 2-FSK
// PA Ramping = true
// Packet Bit Length = 0
// Packet Length = 255
// Packet Length Mode = Variable
// Performance Mode = High Performance
// RX Filter BW = 10.000000
// Symbol rate = 1.2
// TX Power = 15
// Whitening = false
#include "stdint.h"
const uint16_t CC112X_REG_SETTING[][2]=
{
{0X0000,0X53},//IOCFG3 GPIO3 IO PIN CONFIGURATION
{0X0001,0X46},//IOCFG2 GPIO2 IO PIN CONFIGURATION
{0X0003,0X51},//IOCFG0 GPIO0 IO PIN CONFIGURATION
{0X0008,0X0B},//SYNC_CFG1 SYNC WORD DETECTION CONFIGURATION REG. 1
{0X000C,0X1C},//DCFILT_CFG DIGITAL DC REMOVAL CONFIGURATION
{0X0010,0XC6},//IQIC DIGITAL IMAGE CHANNEL COMPENSATION CONFIGURATION
{0X0013,0X05},//MDMCFG0 GENERAL MODEM PARAMETER CONFIGURATION REG. 0
{0X0017,0X20},//AGC_REF AGC REFERENCE LEVEL CONFIGURATION
{0X0018,0X19},//AGC_CS_THR CARRIER SENSE THRESHOLD CONFIGURATION
{0X001C,0XA9},//AGC_CFG1 AUTOMATIC GAIN CONTROL CONFIGURATION REG. 1
{0X001D,0XCF},//AGC_CFG0 AUTOMATIC GAIN CONTROL CONFIGURATION REG. 0
{0X001E,0X00},//FIFO_CFG FIFO CONFIGURATION
{0X0021,0X14},//FS_CFG FREQUENCY SYNTHESIZER CONFIGURATION
{0X0028,0X20},//PKT_CFG0 PACKET CONFIGURATION REG. 0
{0X002E,0XFF},//PKT_LEN PACKET LENGTH CONFIGURATION
{0X2F00,0X00},//IF_MIX_CFG IF MIX CONFIGURATION
{0X2F01,0X22},//FREQOFF_CFG FREQUENCY OFFSET CORRECTION CONFIGURATION
{0X2F0C,0X6C},//FREQ2 FREQUENCY CONFIGURATION [23:16]
{0X2F0D,0X80},//FREQ1 FREQUENCY CONFIGURATION [15:8]
{0X2F12,0X00},//FS_DIG1 FREQUENCY SYNTHESIZER DIGITAL REG. 1
{0X2F13,0X5F},//FS_DIG0 FREQUENCY SYNTHESIZER DIGITAL REG. 0
{0X2F16,0X40},//FS_CAL1 FREQUENCY SYNTHESIZER CALIBRATION REG. 1
{0X2F17,0X0E},//FS_CAL0 FREQUENCY SYNTHESIZER CALIBRATION REG. 0
{0X2F19,0X03},//FS_DIVTWO FREQUENCY SYNTHESIZER DIVIDE BY 2
{0X2F1B,0X33},//FS_DSM0 FS DIGITAL SYNTHESIZER MODULE CONFIGURATION REG. 0
{0X2F1D,0X17},//FS_DVC0 FREQUENCY SYNTHESIZER DIVIDER CHAIN CONFIGURATION ..
{0X2F1F,0X50},//FS_PFD FREQUENCY SYNTHESIZER PHASE FREQUENCY DETECTOR CON..
{0X2F20,0X6E},//FS_PRE FREQUENCY SYNTHESIZER PRESCALER CONFIGURATION
{0X2F21,0X14},//FS_REG_DIV_CML FREQUENCY SYNTHESIZER DIVIDER REGULATOR CONFIGURAT..
{0X2F22,0XAC},//FS_SPARE FREQUENCY SYNTHESIZER SPARE
{0X2F27,0XB4},//FS_VCO0 FS VOLTAGE CONTROLLED OSCILLATOR CONFIGURATION REG..
{0X2F32,0X0E},//XOSC5 CRYSTAL OSCILLATOR CONFIGURATION REG. 5
{0X2F36,0X03},//XOSC1 CRYSTAL OSCILLATOR CONFIGURATION REG. 1
{0XFFFF,0XFF}
};
After my actual testing, even if there is no RF signal source present when the antenna is connected, the RSSI value read is as high as -75dbm, fluctuating around this value. When I unplug the antenna, the RSSI value drops back to around -100dBm, which is clearly the normal value when there is no signal. I have compensated for the RSSI value using software. When I input RF signals of different intensities with the instrument, the RSSI values read are normal, and the error between the RSSI value and the output intensity of the instrument is within 3dBm. This should indicate that there is no problem with the RSSI indicating register. The question is: why does the RSSI value read so high when there is no RF signal? May I ask what caused this and how to improve it? This issue has a significant impact on reception performance
To add, I have tried using different RF parameter settings in SmartRF Studio without any changes or improvements.
