读取CC1101的RSSI寄存器问题

各位好！我在读取CC1101的RSSI寄存器时，每读取一次读到4096个值，并且4096个值都是一样的，不知道为什么？我只想读一次RSSI寄存器只读到一个值，请前辈们帮忙解决下。我配置的CC1101位915MHZ、ASK/OOK，下面是我的发送函数例程

#include <reg52.h>
#include <intrins.h>
#define INT8U unsigned char
#define INT16U unsigned int

#define WRITE_BURST 0x40 //连续写入
#define READ_SINGLE 0x80 //读
#define READ_BURST 0xC0 //连续读
#define BYTES_IN_RXFIFO 0x7F //接收缓冲区的有效字节数
#define CRC_OK 0x80 //CRC校验通过位标志
//*****************************************************************************************
sbit GDO0 =P0^2;
sbit GDO2 =P1^3;
sbit MISO =P1^6;
sbit MOSI =P1^5;
sbit SCK =P1^7;
sbit CSN =P1^2;
//INT8U PaTabel[8] = {0x60 ,0x60 ,0x60 ,0x60 ,0x60 ,0x60 ,0x60 ,0x60}; //PATABLE 选择PA功率控制设置 0x3E
//*****************************************************************************************
void SpiInit(void);
void CpuInit(void);
void RESET_CC1100(void);
void POWER_UP_RESET_CC1100(void);
void halSpiWriteReg(INT8U addr, INT8U value);
void halSpiWriteBurstReg(INT8U addr, INT8U *buffer, INT8U count);
void halSpiStrobe(INT8U strobe);
INT8U halSpiReadReg(INT8U addr);
void halSpiReadBurstReg(INT8U addr, INT8U *buffer, INT8U count);
INT8U halSpiReadStatus(INT8U addr);
void halRfWriteRfSettings(void);
void halRfSendPacket(INT8U *txBuffer, INT8U size);
//*****************************************************************************************
// CC1100 STROBE, CONTROL AND STATUS REGSITER 控制和状态寄存器选通脉中命令
#define CCxxx0_IOCFG2 0x00 // GDO2 output pin configuration
#define CCxxx0_IOCFG1 0x01 // GDO1 output pin configuration
#define CCxxx0_IOCFG0 0x02 // GDO0 output pin configuration
#define CCxxx0_FIFOTHR 0x03 // RX FIFO and TX FIFO thresholds
#define CCxxx0_SYNC1 0x04 // Sync word, high INT8U
#define CCxxx0_SYNC0 0x05 // Sync word, low INT8U
#define CCxxx0_PKTLEN 0x06 // Packet length
#define CCxxx0_PKTCTRL1 0x07 // Packet automation control
#define CCxxx0_PKTCTRL0 0x08 // Packet automation control
#define CCxxx0_ADDR 0x09 // Device address
#define CCxxx0_CHANNR 0x0A // Channel number
#define CCxxx0_FSCTRL1 0x0B // Frequency synthesizer control
#define CCxxx0_FSCTRL0 0x0C // Frequency synthesizer control
#define CCxxx0_FREQ2 0x0D // Frequency control word, high INT8U
#define CCxxx0_FREQ1 0x0E // Frequency control word, middle INT8U
#define CCxxx0_FREQ0 0x0F // Frequency control word, low INT8U
#define CCxxx0_MDMCFG4 0x10 // Modem configuration
#define CCxxx0_MDMCFG3 0x11 // Modem configuration
#define CCxxx0_MDMCFG2 0x12 // Modem configuration
#define CCxxx0_MDMCFG1 0x13 // Modem configuration
#define CCxxx0_MDMCFG0 0x14 // Modem configuration
#define CCxxx0_DEVIATN 0x15 // Modem deviation setting
#define CCxxx0_MCSM2 0x16 // Main Radio Control State Machine configuration
#define CCxxx0_MCSM1 0x17 // Main Radio Control State Machine configuration
#define CCxxx0_MCSM0 0x18 // Main Radio Control State Machine configuration
#define CCxxx0_FOCCFG 0x19 // Frequency Offset Compensation configuration
#define CCxxx0_BSCFG 0x1A // Bit Synchronization configuration
#define CCxxx0_AGCCTRL2 0x1B // AGC control
#define CCxxx0_AGCCTRL1 0x1C // AGC control
#define CCxxx0_AGCCTRL0 0x1D // AGC control
#define CCxxx0_WOREVT1 0x1E // High INT8U Event 0 timeout
#define CCxxx0_WOREVT0 0x1F // Low INT8U Event 0 timeout
#define CCxxx0_WORCTRL 0x20 // Wake On Radio control
#define CCxxx0_FREND1 0x21 // Front end RX configuration
#define CCxxx0_FREND0 0x22 // Front end TX configuration
#define CCxxx0_FSCAL3 0x23 // Frequency synthesizer calibration
#define CCxxx0_FSCAL2 0x24 // Frequency synthesizer calibration
#define CCxxx0_FSCAL1 0x25 // Frequency synthesizer calibration
#define CCxxx0_FSCAL0 0x26 // Frequency synthesizer calibration
#define CCxxx0_RCCTRL1 0x27 // RC oscillator configuration
#define CCxxx0_RCCTRL0 0x28 // RC oscillator configuration
#define CCxxx0_FSTEST 0x29 // Frequency synthesizer calibration control
#define CCxxx0_PTEST 0x2A // Production test
#define CCxxx0_AGCTEST 0x2B // AGC test
#define CCxxx0_TEST2 0x2C // Various test settings
#define CCxxx0_TEST1 0x2D // Various test settings
#define CCxxx0_TEST0 0x2E // Various test settings

// Strobe commands 选通脉冲命令
#define CCxxx0_SRES 0x30 // Reset chip.
#define CCxxx0_SFSTXON 0x31 // Enable and calibrate frequency synthesizer (if MCSM0.FS_AUTOCAL=1).
// If in RX/TX: Go to a wait state where only the synthesizer is
// running (for quick RX / TX turnaround).
#define CCxxx0_SXOFF 0x32 // Turn off crystal oscillator.
#define CCxxx0_SCAL 0x33 // Calibrate frequency synthesizer and turn it off
// (enables quick start).
#define CCxxx0_SRX 0x34 // Enable RX. Perform calibration first if coming from IDLE and
// MCSM0.FS_AUTOCAL=1.
#define CCxxx0_STX 0x35 // In IDLE state: Enable TX. Perform calibration first if
// MCSM0.FS_AUTOCAL=1. If in RX state and CCA is enabled:
// Only go to TX if channel is clear.
#define CCxxx0_SIDLE 0x36 // Exit RX / TX, turn off frequency synthesizer and exit
// Wake-On-Radio mode if applicable.
#define CCxxx0_SAFC 0x37 // Perform AFC adjustment of the frequency synthesizer
#define CCxxx0_SWOR 0x38 // Start automatic RX polling sequence (Wake-on-Radio)
#define CCxxx0_SPWD 0x39 // Enter power down mode when CSn goes high.
#define CCxxx0_SFRX 0x3A // Flush the RX FIFO buffer.
#define CCxxx0_SFTX 0x3B // Flush the TX FIFO buffer.
#define CCxxx0_SWORRST 0x3C // Reset real time clock.
#define CCxxx0_SNOP 0x3D // No operation. May be used to pad strobe commands to two
// INT8Us for simpler software.

#define CCxxx0_PARTNUM 0x30
#define CCxxx0_VERSION 0x31
#define CCxxx0_FREQEST 0x32
#define CCxxx0_LQI 0x33
#define CCxxx0_RSSI 0x34
#define CCxxx0_MARCSTATE 0x35
#define CCxxx0_WORTIME1 0x36
#define CCxxx0_WORTIME0 0x37
#define CCxxx0_PKTSTATUS 0x38
#define CCxxx0_VCO_VC_DAC 0x39
#define CCxxx0_TXBYTES 0x3A
#define CCxxx0_RXBYTES 0x3B

#define CCxxx0_PATABLE 0x3E
#define CCxxx0_TXFIFO 0x3F
#define CCxxx0_RXFIFO 0x3F

// RF_SETTINGS is a data structure which contains all relevant CCxxx0 registers
typedef struct S_RF_SETTINGS
{
INT8U IOCFG0; //自已加的
INT8U PKTCTRL0; // Frequency synthesizer control.
INT8U FSCTRL1; // Frequency synthesizer control.
INT8U FREQ2; // Frequency control word, high INT8U.
INT8U FREQ1; // Frequency control word, middle INT8U.
INT8U FREQ0; // Frequency control word, low INT8U.
INT8U MDMCFG4; // Modem configuration.
INT8U MDMCFG3; // Modem configuration.
INT8U MDMCFG2; // Modem configuration.
// INT8U MDMCFG1; // Modem configuration.
// INT8U MDMCFG0; 1 // Modem configuration.
// INT8U CHANNR; 1 // Channel number.
INT8U DEVIATN; // Modem deviation setting (when FSK modulation is enabled).
INT8U MCSM0; // Front end RX configuration.
INT8U FOCCFG; // Front end RX configuration.
INT8U BSCFG; // Main Radio Control State Machine configuration.
INT8U AGCCTRL2; // Frequency Offset Compensation Configuration.
INT8U AGCCTRL1; // Bit synchronization Configuration.
INT8U AGCCTRL0; // AGC control.
INT8U WORCTRL; // AGC control.
INT8U FREND1; // AGC control.
INT8U FREND0; // Frequency synthesizer calibration.
INT8U FSCAL3; // Frequency synthesizer calibration.
INT8U FSCAL2; // Frequency synthesizer calibration.
INT8U FSCAL1; // Frequency synthesizer calibration.
INT8U FSCAL0; // Frequency synthesizer calibration control
INT8U TEST0; // Various test settings.
// INT8U TEST1; 1 // Various test settings.
// INT8U TEST0; 1 // Various test settings.
// INT8U IOCFG2; 1 // GDO2 output pin configuration
// INT8U IOCFG0; 1 // GDO0 output pin configuration
// INT8U PKTCTRL1; 1 // Packet automation control.
// INT8U PKTCTRL0; 1 // Packet automation control.
// INT8U ADDR; 1 // Device address.
// INT8U PKTLEN; 1 // Packet length.
// INT8U FIFOTHR;
// INT8U WORCTRL;
} RF_SETTINGS;

const RF_SETTINGS rfSettings =
{
0x06, // IOCFG0 GDO0 Output Pin Configuration
0x05, // PKTCTRL0 Packet Automation Control
0x0C, // FSCTRL1 Frequency Synthesizer Control
0x10, // FREQ2 Frequency Control Word, High Byte
0xB0, // FREQ1 Frequency Control Word, Middle Byte
0x71, // FREQ0 Frequency Control Word, Low Byte
0x2D, // MDMCFG4 Modem Configuration
0x3B, // MDMCFG3 Modem Configuration
0x3B, // MDMCFG2 Modem Configuration
0x62, // DEVIATN Modem Deviation Setting
0x18, // MCSM0 Main Radio Control State Machine Configuration
0x1D, // FOCCFG Frequency Offset Compensation Configuration
0x1C, // BSCFG Bit Synchronization Configuration
0x04, // AGCCTRL2 AGC Control
0x00, // AGCCTRL1 AGC Control
0x92, // AGCCTRL0 AGC Control
0xFB, // WORCTRL Wake On Radio Control
0xB6, // FREND1 Front End RX Configuration
0x11, // FREND0 Front End TX Configuration
0xEA, // FSCAL3 Frequency Synthesizer Calibration
0x2A, // FSCAL2 Frequency Synthesizer Calibration
0x00, // FSCAL1 Frequency Synthesizer Calibration
0x1F, // FSCAL0 Frequency Synthesizer Calibration
0x09, // TEST0 Various Test Settings
};

//*****************************************************************************************
//函数名：delay(unsigned int s)
//输入：时间
//输出：无
//功能描述：普通延时,内部用
//*****************************************************************************************
static void delay(unsigned int s)
{
unsigned int i;
for(i=0; i<s; i++);
for(i=0; i<s; i++);
}

void halWait(INT16U timeout) {
do {
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
} while (--timeout);
}

void SpiInit(void)
{
CSN=0;
SCK=0;
CSN=1;
}

/*****************************************************************************************
//函数名：CpuInit()
//输入：无
//输出：无
//功能描述：SPI初始化程序
/*****************************************************************************************/
void CpuInit(void)
{
SpiInit();
delay(5000);
}

//*****************************************************************************************
//函数名：SpisendByte(INT8U dat)
//输入：发送的数据
//输出：无
//功能描述：SPI发送一个字节
//*****************************************************************************************
INT8U SpiTxRxByte(INT8U dat)
{
INT8U i,temp;
temp = 0;

SCK = 0;
for(i=0; i<8; i++)
{
if(dat & 0x80)
{
MOSI = 1;
}
else MOSI = 0;
dat <<= 1;

SCK = 1;
_nop_();
_nop_();

temp <<= 1;
if(MISO)temp++;
SCK = 0;
_nop_();
_nop_();
}
return temp;
}

//*****************************************************************************************
//函数名：void RESET_CC1100(void)
//输入：无
//输出：无
//功能描述：复位CC1100
//*****************************************************************************************
void RESET_CC1100(void)
{
CSN = 0;
while (MISO);
SpiTxRxByte(CCxxx0_SRES); //写入复位命令
while (MISO);
CSN = 1;
}

//*****************************************************************************************
//函数名：void POWER_UP_RESET_CC1100(void)
//输入：无
//输出：无
//功能描述：上电复位CC1100
//*****************************************************************************************
void POWER_UP_RESET_CC1100(void)
{
CSN = 1;
halWait(1);
CSN = 0;
halWait(1);
CSN = 1;
halWait(41);
RESET_CC1100(); //复位CC1100
}

//*****************************************************************************************
//函数名：void halSpiWriteReg(INT8U addr, INT8U value)
//输入：地址和配置字
//输出：无
//功能描述：SPI写寄存器
//*****************************************************************************************
void halSpiWriteReg(INT8U addr, INT8U value)
{
CSN = 0;
while (MISO);
SpiTxRxByte(addr); //写地址
SpiTxRxByte(value); //写入配置
CSN = 1;
}

//*****************************************************************************************
//函数名：void halSpiWriteBurstReg(INT8U addr, INT8U *buffer, INT8U count)
//输入：地址，写入缓冲区，写入个数
//输出：无
//功能描述：SPI连续写配置寄存器
//*****************************************************************************************
void halSpiWriteBurstReg(INT8U addr, INT8U *buffer, INT8U count)
{
INT8U i, temp;
temp = addr | WRITE_BURST;
CSN = 0;
while (MISO);
SpiTxRxByte(temp);
for (i = 0; i < count; i++)
{
SpiTxRxByte(buffer[i]);
}
CSN = 1;
}

//*****************************************************************************************
//函数名：void halSpiStrobe(INT8U strobe)
//输入：命令
//输出：无
//功能描述：SPI写命令
//*****************************************************************************************
void halSpiStrobe(INT8U strobe)
{
CSN = 0;
while (MISO);
SpiTxRxByte(strobe); //写入命令
CSN = 1;
}

//*****************************************************************************************
//函数名：INT8U halSpiReadReg(INT8U addr)
//输入：地址
//输出：该寄存器的配置字
//功能描述：SPI读寄存器
//*****************************************************************************************
INT8U halSpiReadReg(INT8U addr)
{
INT8U temp, value;
temp = addr|READ_SINGLE;//读寄存器命令
CSN = 0;
while (MISO);
SpiTxRxByte(temp);
value = SpiTxRxByte(0);
CSN = 1;
return value;
}

//*****************************************************************************************
//函数名：void halSpiReadBurstReg(INT8U addr, INT8U *buffer, INT8U count)
//输入：地址，读出数据后暂存的缓冲区，读出配置个数
//输出：无
//功能描述：SPI连续写配置寄存器
//*****************************************************************************************
void halSpiReadBurstReg(INT8U addr, INT8U *buffer, INT8U count)
{
INT8U i,temp;
temp = addr | READ_BURST; //写入要读的配置寄存器地址和读命令
CSN = 0;
while (MISO);
SpiTxRxByte(temp);
for (i = 0; i < count; i++)
{
buffer[i] = SpiTxRxByte(0);
}
CSN = 1;
}

//*****************************************************************************************
//函数名：INT8U halSpiReadReg(INT8U addr)
//输入：地址
//输出：该状态寄存器当前值
//功能描述：SPI读状态寄存器
//*****************************************************************************************
INT8U halSpiReadStatus(INT8U addr)
{
INT8U value,temp;
temp = addr | READ_BURST; //写入要读的状态寄存器的地址同时写入读命令
CSN = 0;
while (MISO);
SpiTxRxByte(temp);
value = SpiTxRxByte(0);
CSN = 1;
return value;
}
//*****************************************************************************************
//函数名：void halRfWriteRfSettings(RF_SETTINGS *pRfSettings)
//输入：无
//输出：无
//功能描述：配置CC1100的寄存器
//*****************************************************************************************
void halRfWriteRfSettings(void)
{

// halSpiWriteReg(CCxxx0_FSCTRL0, rfSettings.FSCTRL2);//自已加的
// // Write register settings
halSpiWriteReg(CCxxx0_FSCTRL1, rfSettings.FSCTRL1); //写寄存器
// halSpiWriteReg(CCxxx0_FSCTRL0, rfSettings.FSCTRL0); //把结构体里的值放进去
halSpiWriteReg(CCxxx0_FREQ2, rfSettings.FREQ2);
halSpiWriteReg(CCxxx0_FREQ1, rfSettings.FREQ1);
halSpiWriteReg(CCxxx0_FREQ0, rfSettings.FREQ0);
halSpiWriteReg(CCxxx0_MDMCFG4, rfSettings.MDMCFG4);
halSpiWriteReg(CCxxx0_MDMCFG3, rfSettings.MDMCFG3);
halSpiWriteReg(CCxxx0_MDMCFG2, rfSettings.MDMCFG2);
// halSpiWriteReg(CCxxx0_MDMCFG1, rfSettings.MDMCFG1);
// halSpiWriteReg(CCxxx0_MDMCFG0, rfSettings.MDMCFG0);
// halSpiWriteReg(CCxxx0_CHANNR, rfSettings.CHANNR);
halSpiWriteReg(CCxxx0_DEVIATN, rfSettings.DEVIATN);
halSpiWriteReg(CCxxx0_FREND1, rfSettings.FREND1);
halSpiWriteReg(CCxxx0_FREND0, rfSettings.FREND0);
halSpiWriteReg(CCxxx0_MCSM0 , rfSettings.MCSM0 );
halSpiWriteReg(CCxxx0_FOCCFG, rfSettings.FOCCFG);
halSpiWriteReg(CCxxx0_BSCFG, rfSettings.BSCFG);
halSpiWriteReg(CCxxx0_AGCCTRL2, rfSettings.AGCCTRL2);
halSpiWriteReg(CCxxx0_AGCCTRL1, rfSettings.AGCCTRL1);
halSpiWriteReg(CCxxx0_AGCCTRL0, rfSettings.AGCCTRL0);
halSpiWriteReg(CCxxx0_FSCAL3, rfSettings.FSCAL3);
halSpiWriteReg(CCxxx0_FSCAL2, rfSettings.FSCAL2);
halSpiWriteReg(CCxxx0_FSCAL1, rfSettings.FSCAL1);
halSpiWriteReg(CCxxx0_FSCAL0, rfSettings.FSCAL0);
// halSpiWriteReg(CCxxx0_FSTEST, rfSettings.FSTEST);
// halSpiWriteReg(CCxxx0_TEST2, rfSettings.TEST2);
// halSpiWriteReg(CCxxx0_TEST1, rfSettings.TEST1);
halSpiWriteReg(CCxxx0_TEST0, rfSettings.TEST0);
// halSpiWriteReg(CCxxx0_IOCFG2, rfSettings.IOCFG2);
halSpiWriteReg(CCxxx0_IOCFG0, rfSettings.IOCFG0);
// halSpiWriteReg(CCxxx0_PKTCTRL1, rfSettings.PKTCTRL1);
halSpiWriteReg(CCxxx0_PKTCTRL0, rfSettings.PKTCTRL0);
halSpiWriteReg(CCxxx0_WORCTRL, rfSettings.WORCTRL);
// halSpiWriteReg(CCxxx0_ADDR, rfSettings.ADDR);
// halSpiWriteReg(CCxxx0_PKTLEN, rfSettings.PKTLEN);
}

//*****************************************************************************************
//函数名：void halRfSendPacket(INT8U *txBuffer, INT8U size)
//输入：发送的缓冲区，发送数据个数
//输出：无
//功能描述：CC1100发送一组数据
//*****************************************************************************************

void halRfSendPacket(INT8U *txBuffer, INT8U size)
{
halSpiWriteReg(CCxxx0_TXFIFO, size);
halSpiWriteBurstReg(CCxxx0_TXFIFO, txBuffer, size); //写入要发送的数据
halSpiStrobe(CCxxx0_SIDLE);
halSpiStrobe(CCxxx0_STX); //进入发送模式发送数据
// Wait for GDO0 to be set -> sync transmitted
while (!GDO0);
// Wait for GDO0 to be cleared -> end of packet
while (GDO0);
halSpiStrobe(CCxxx0_SFTX);
}

void setRxMode(void)
{
halSpiStrobe(CCxxx0_SRX); //进入接收状态
}

/*
void Delay(unsigned int s)
{
unsigned int i;
for(i=0; i<s; i++);
for(i=0; i<s; i++);
}

*/
void main(void)
{
// unsigned char ii;
INT8U TxBuf[8]={0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08}; // 8字节, 如果需要更长的数据包,请正确设置
INT8U* TxBuf1;
INT8U TxBuf2=0x02;
INT8U TxBuf3=0x03;
INT8U TxBuf4=0x04;
INT8U TxBuf5=0x05;
INT8U RSSI_value = 0;
INT8U PaTabel[8] = {0x00 ,0x1d ,0x00 ,0x00 ,0x00,0x00,0x00,0x00};
CpuInit();
POWER_UP_RESET_CC1100();
halRfWriteRfSettings(); //配置寄存器
halSpiWriteBurstReg(CCxxx0_PATABLE, PaTabel, 8); // 连续写8为给缓冲区

while(1)
{

// if(TxBuf <11 )
// {
// INT8U halSpiReadStatus(INT8U addr)
// void halSpiReadBurstReg(INT8U addr, INT8U *buffer, INT8U count)
// halSpiReadBurstReg(0x34,TxBuf1,1);
// INT8U halSpiReadReg(INT8U addr)
// RSSI_value = halSpiReadStatus(0x34);
RSSI_value = halSpiReadReg(0x34);
// TxBuf1 = &RSSI_value;
if(RSSI_value)
{
halRfSendPacket(&RSSI_value,1);// Transmit Tx buffer data
delay(90000); //设置1秒发射一次
delay(90000);
delay(90000);
delay(90000);
RSSI_value=0;
}

/* delay(90000);
delay(90000);
delay(90000);
delay(90000);
delay(90000);
delay(90000); */
}
}

建议在这个地方发帖咨询：

• 硬件, 射频和私有技术

RSSI叫做接收到的信号强度指示，这个值是波动的。你可以先通信成功，再读取这个值。只有接收时这个值才是有意义的。

请问Jason，CC1101是否可以用来监控空气中相同频率段的信号呢？利用读取RSSI的强度值，如果可以，应该让CC1101工作在哪个模式下呢？谢谢！