CC1101 not sending a packet ?

Michael Letsky

Other Parts Discussed in Thread: CC1101

Hey All,

I can receive a packet sent by SmartRF, but not by my firmware. I'm really confused on why. I use an Atmel Xmega for the main processor.

Here are some code snippits:

// Initial settings on CC1101 Init:

CC1101_RF_SETTINGS.IOCFG0 = 0x06;
	CC1101_RF_SETTINGS.PKTCTRL0 = 0x05;
	CC1101_RF_SETTINGS.FSCTRL1 = 0x06;
	CC1101_RF_SETTINGS.FREQ2 = 0x21;
	CC1101_RF_SETTINGS.FREQ1 = 0x62;
	CC1101_RF_SETTINGS.FREQ0 = 0x76;
	CC1101_RF_SETTINGS.MDMCFG4 = 0xF5;
	CC1101_RF_SETTINGS.MDMCFG3 = 0x83;
	CC1101_RF_SETTINGS.MDMCFG2 = 0x13;
	CC1101_RF_SETTINGS.DEVIATN = 0x15;
	CC1101_RF_SETTINGS.MCSM0 = 0x18;
	CC1101_RF_SETTINGS.FOCCFG = 0x16;
	CC1101_RF_SETTINGS.WORCTRL = 0xFB;
	CC1101_RF_SETTINGS.FSCAL3 = 0xE9;
	CC1101_RF_SETTINGS.FSCAL2 = 0x2A;
	CC1101_RF_SETTINGS.FSCAL1 = 0x00;
	CC1101_RF_SETTINGS.FSCAL0 = 0x1F;
	CC1101_RF_SETTINGS.TEST2 = 0x81;
	CC1101_RF_SETTINGS.TEST1 = 0x35;
	CC1101_RF_SETTINGS.TEST0 = 0x09;
	CC1101_RF_SETTINGS.LQI = 0x80;
	CC1101_RF_SETTINGS.RSSI = 0x80;

// Place CC1101 in TX mode.

void ccxxx0_TxMode(void)
{
	char regStatus =0;
	ccxxx0_Strobe(CCxxx0_SIDLE);
	while (regStatus != 0) 
	{ 
		regStatus = ccxxx0_ReadStatus(CCxxx0_MARCSTATE);
	}		
	ccxxx0_Strobe(CCxxx0_SFTX); // flush Tx buff
	
}

void send_RF_msg(char message_type, char *msg, char length_lessThan59, char destination)
{
	unsigned char tx_msg[64];
	unsigned char msg_len;

 unsigned char source =1;
	char index;

if (length_lessThan59 > MAX_MSG_LENGTH) {
		length_lessThan59 = MAX_MSG_LENGTH;
	}

	msg_len=1;
	tx_msg[msg_len++]= destination;
	tx_msg[msg_len++]= source;
	tx_msg[msg_len++]= message_type;
	tx_msg[msg_len++]= length_lessThan59;
	for (index=0; index<length_lessThan59; index++) {
		tx_msg[msg_len++] = msg[index];
	}

	tx_msg[0]=msg_len;

 ccxxx0_TxMode();
	ccxxx0_WriteBurst(CCxxx0_TXFIFO, tx_msg, msg_len); // addr= 1 byte, payload= bytes,  PKTLEN= addr + payload
	ccxxx0_Strobe(CCxxx0_STX); // activate Tx!

 while (gpio_pin_is_high(CC1101_GDO0)); // wait for GDO0 to be cleared -> end of packet.

I can see the CC1101 draw the power and it seems like it's transmitting something, but the SmartRF and my Receiver is not picking it up.

Any ideas what might be wrong?

over 12 years ago

0 Michael Letsky over 12 years ago

Prodigy 105 points

I'm checking my states right after I send the STX

and see the following on MarcState:

0x0f

0x2f ........many times, then last one

0xdc

When i try to send data via Burst Write

I get :

0x0f

0x7f ... Many times

Then last one

0x27

Most of these don't seem to match the table located in http://www.ti.com/lit/ds/symlink/cc1101.pdf page 93, unless I am reading it wrong...??

Any help I can get would be great.

My register settings are now:

RF_SETTINGS rfSettings = {
    0x0B,    // IOCFG2        GDO2 Output Pin Configuration
    0x06,    // IOCFG0        GDO0 Output Pin Configuration
    0x47,  // FIFOTHR       RX FIFO and TX FIFO Thresholds
    0x05,    // PKTCTRL0      Packet Automation Control
    0x06,    // FSCTRL1       Frequency Synthesizer Control
    0x23,    // FREQ2         Frequency Control Word, High Byte
    0x31,    // FREQ1         Frequency Control Word, Middle Byte
    0x3B,    // FREQ0         Frequency Control Word, Low Byte
    0xF8,    // MDMCFG4       Modem Configuration
    0x83,    // MDMCFG3       Modem Configuration
    0x13,    // MDMCFG2       Modem Configuration
    0x14,    // DEVIATN       Modem Deviation Setting
    0x18,    // MCSM0         Main Radio Control State Machine Configuration
    0x16,    // FOCCFG        Frequency Offset Compensation Configuration
    0x43,    // AGCCTRL2      AGC Control
    0xFB,    // WORCTRL       Wake On Radio Control
    0x17,    // 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
    0x81,    // TEST2         Various Test Settings
    0x35,    // TEST1         Various Test Settings
    0x09,    // TEST0         Various Test Settings
    0x80,    // RSSI          Received Signal Strength Indication
    0x01,    // MARCSTATE     Main Radio Control State Machine State
    0x94,    // VCO_VC_DAC    Current Setting from PLL Calibration Module
};

My debug program is

void debug_cc_state(void){
  unsigned char marcstate_table[1024];
  unsigned int ii;
  
  for(ii=0;ii<1023;ii++) {
		CC1101_ReadRegister(CC1101_MARCSTATE, &marcstate_table[ii]);
    for (int i=0; i<1000; i++); // delay cycles 
  }
  // implment an arbitrary manipulation of "marcstate_table" so the compiler
  // does not remove all the results during optimization.
  marcstate_table[0] = marcstate_table[1023]+1; 
}

I rewrote some code as well.

Any ideas what could be the problem, or why my MARCSTATE values are not as I am expecting?

Best Regards,

Mike

0 Michael Letsky over 12 years ago in reply to Michael Letsky

Prodigy 105 points

I'm still trying to debug this problem.

It seems like (to me and I'm not an expert) that the CC1101 is Transmitting, maybe, at very low power?

Here is the chart from the Spectrum Analyizer.

Any feedback would be great, I really need help!

Also attached is my SmartRF config.

1884.cc1101_432012.xml

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE configuration SYSTEM "C:/Program Files (x86)/Texas Instruments/SmartRF Tools/SmartRF Studio 7/config/xml/configdata.dtd"[]>
<dcpanelconfiguration>
    <Devicename>CC1101</Devicename>
    <Description>Saved configuration data</Description>
    <registersettings>
        <Register>
            <Name>ADDR</Name>
            <Value>0x01</Value>
        </Register>
        <Register>
            <Name>AGCCTRL2</Name>
            <Value>0x43</Value>
        </Register>
        <Register>
            <Name>CHANNR</Name>
            <Value>0x01</Value>
        </Register>
        <Register>
            <Name>DEVIATN</Name>
            <Value>0x14</Value>
        </Register>
        <Register>
            <Name>FIFOTHR</Name>
            <Value>0x66f2</Value>
        </Register>
        <Register>
            <Name>FOCCFG</Name>
            <Value>0x16</Value>
        </Register>
        <Register>
            <Name>FREQ0</Name>
            <Value>0x3b</Value>
        </Register>
        <Register>
            <Name>FREQ1</Name>
            <Value>0x31</Value>
        </Register>
        <Register>
            <Name>FREQ2</Name>
            <Value>0x23</Value>
        </Register>
        <Register>
            <Name>FSCAL0</Name>
            <Value>0x1f</Value>
        </Register>
        <Register>
            <Name>FSCAL1</Name>
            <Value>0x00</Value>
        </Register>
        <Register>
            <Name>FSCAL2</Name>
            <Value>0x2a</Value>
        </Register>
        <Register>
            <Name>FSCAL3</Name>
            <Value>0xe9</Value>
        </Register>
        <Register>
            <Name>FSCTRL1</Name>
            <Value>0x06</Value>
        </Register>
        <Register>
            <Name>IOCFG0</Name>
            <Value>0x06</Value>
        </Register>
        <Register>
            <Name>MARCSTATE</Name>
            <Value>0x01</Value>
        </Register>
        <Register>
            <Name>MCSM0</Name>
            <Value>0x18</Value>
        </Register>
        <Register>
            <Name>MDMCFG2</Name>
            <Value>0x13</Value>
        </Register>
        <Register>
            <Name>MDMCFG3</Name>
            <Value>0x83</Value>
        </Register>
        <Register>
            <Name>MDMCFG4</Name>
            <Value>0xf8</Value>
        </Register>
        <Register>
            <Name>PA_TABLE0</Name>
            <Value>0x8e</Value>
        </Register>
        <Register>
            <Name>PKTCTRL0</Name>
            <Value>0x05</Value>
        </Register>
        <Register>
            <Name>PKTCTRL1</Name>
            <Value>0x06</Value>
        </Register>
        <Register>
            <Name>RSSI</Name>
            <Value>0x80</Value>
        </Register>
        <Register>
            <Name>TEST0</Name>
            <Value>0x09</Value>
        </Register>
        <Register>
            <Name>TEST1</Name>
            <Value>0x35</Value>
        </Register>
        <Register>
            <Name>TEST2</Name>
            <Value>0x81</Value>
        </Register>
        <Register>
            <Name>VCO_VC_DAC</Name>
            <Value>0x94</Value>
        </Register>
        <Register>
            <Name>WORCTRL</Name>
            <Value>0xfb</Value>
        </Register>
    </registersettings>
    <dcpanel>
        <Property role="44" name="m_chkRegView">2</Property>
        <Property role="44" name="m_chkRfParameters">2</Property>
        <Property role="37" name="m_tabUserMode">1</Property>
        <Property role="33" name="m_easyModeSettings">-1</Property>
        <Property role="33" name="m_typicalSettings">-1</Property>
        <Property role="37" name="m_testFuncPanel">3</Property>
    </dcpanel>
    <rfparameters>
        <Property role="46" name="m_cmbFrontends">0</Property>
        <Property role="44" name="m_chkHGM">2</Property>
        <Property role="46" name="m_cmbEmRevs">-1</Property>
        <Property role="46" name="m_cmbAntList">-1</Property>
        <Property role="46" name="Xtal frequency">26.000000</Property>
    </rfparameters>
    <conttx>
        <Property role="45" name="m_rbtModulated">1</Property>
        <Property role="45" name="m_rbtUnmodulated">0</Property>
        <Property role="46" name="m_cmbDataFormat">-1</Property>
        <Property role="44" name="m_chkFreqSweep">0</Property>
        <Property role="44" name="m_chkChanSweep">0</Property>
    </conttx>
    <contrx>
        <Property role="46" name="m_cmbDataFormat">-1</Property>
        <Property role="44" name="m_chkAutoScroll">2</Property>
    </contrx>
    <packettx>
        <Property role="42" name="m_edtPayloadSize">30</Property>
        <Property role="42" name="m_edtPacketCount">100</Property>
        <Property role="42" name="m_edtPacketCountEsy">100</Property>
        <Property role="42" name="m_edtRandomPacketData">13 0d 89 0a 1c db ae 32 20 9a 50 ee 40 78 36 fd 12 49 32 f6 9e 7d 49 dc ad 4f 14 f2 </Property>
        <Property role="42" name="m_edtPacketData"></Property>
        <Property role="42" name="m_edtAccessAddress"></Property>
        <Property role="44" name="m_chkAddSeqNbr">2</Property>
        <Property role="44" name="m_chkInfinite">0</Property>
        <Property role="44" name="m_chkInfiniteEsy">0</Property>
        <Property role="45" name="m_rbtRandom">1</Property>
        <Property role="45" name="m_rbtText">0</Property>
        <Property role="45" name="m_rbtHex">0</Property>
        <Property role="44" name="m_chkAdvanced">2</Property>
        <Property role="46" name="m_cmbSyncWord">3</Property>
        <Property role="46" name="m_cmbPreambleCount">2</Property>
        <Property role="44" name="m_chkAddress">0</Property>
        <Property role="42" name="m_edtAddress"></Property>
        <Property role="46" name="m_cmbLengthConfig">-1</Property>
        <Property role="42" name="m_edtLengthConfig"></Property>
        <Property role="52" name="m_spnPktInterval">150</Property>
        <Property role="44" name="m_chkDefPktInterval">2</Property>
    </packettx>
    <packetrx>
        <Property role="42" name="m_edtPacketCount">100</Property>
        <Property role="42" name="m_edtPacketCountEsy">100</Property>
        <Property role="42" name="m_edtAccessAddress"></Property>
        <Property role="44" name="m_chkInfinite">0</Property>
        <Property role="44" name="m_chkInfiniteEsy">0</Property>
        <Property role="46" name="m_cmbViewFormat">0</Property>
        <Property role="44" name="m_chkSeqNbrIncluded">0</Property>
        <Property role="42" name="m_edtDumpFile"></Property>
        <Property role="44" name="m_chkAdvanced">2</Property>
        <Property role="46" name="m_cmbSyncWord">3</Property>
        <Property role="46" name="m_cmbAddressConfig">2</Property>
        <Property role="44" name="m_chkAddress">0</Property>
        <Property role="44" name="m_chkFifoAutoFlush">0</Property>
        <Property role="42" name="m_edtAddress">1</Property>
        <Property role="46" name="m_cmbLengthConfig">-1</Property>
        <Property role="42" name="m_edtLengthConfig"></Property>
    </packetrx>
    <commandpanel>
        <Property role="44" name="m_chkInsertLength">0</Property>
        <Property role="42" name="m_edtTxFifo"></Property>
        <Property role="42" name="m_edtRxFifo"></Property>
        <Property role="46" name="m_cmbInstrInput">-1</Property>
    </commandpanel>
</dcpanelconfiguration>

0 Michael Letsky over 12 years ago in reply to Michael Letsky

Prodigy 105 points

After trying different configurations, this CC1101 is not transmitting.

0 Michael Letsky over 12 years ago in reply to Michael Letsky

Prodigy 105 points

So, I used another function to read the MARCSTATE right after entering TX mode and I get:

0x00.......for about 1016 array counts, then i get

0xc2 -- Unknown

0x16 -- TXFIFO_Undeflow

0x00 - Sleep

0x02 - XOFF

0x30 - Unknown

0x20 - TX_END

0xdd - Unknown.

Perhaps, I need to write to TXFIFO before activating TX?

0 Michael Letsky over 12 years ago in reply to Michael Letsky

Prodigy 105 points

So I added an Extra STX after a Burst Write to TXFIFO.

My MARCSTATE array points are now like this:

before point 987; 0x00.

from point 987;

		[987]	0x06	unsigned char{data}@0x272b  ... -- VCOON
		[988]	0x54	unsigned char{data}@0x272c   -- Unknown
		[989]	0x06	unsigned char{data}@0x272d
		[990]	0x54	unsigned char{data}@0x272e
		[991]	0x00	unsigned char{data}@0x272f
		[992]	0x06	unsigned char{data}@0x2730
		[993]	0x54	unsigned char{data}@0x2731
		[994]	0x06	unsigned char{data}@0x2732
		[995]	0x54	unsigned char{data}@0x2733
		[996]	0x06	unsigned char{data}@0x2734
		[997]	0x54	unsigned char{data}@0x2735
		[998]	0x00	unsigned char{data}@0x2736
		[999]	0x00	unsigned char{data}@0x2737  - Sleep
		[1000]	0x01	unsigned char{data}@0x2738  - IDLE
		[1001]	0x4d	unsigned char{data}@0x2739  - unkown
		[1002]	0x00	unsigned char{data}@0x273a - Slee
		[1003]	0x00	unsigned char{data}@0x273b
		[1004]	0x01	unsigned char{data}@0x273c  - idle
		[1005]	0x4d	unsigned char{data}@0x273d  -- unkown
		[1006]	0x00	unsigned char{data}@0x273e
		[1007]	0x00	unsigned char{data}@0x273f
		[1008]	0x00	unsigned char{data}@0x2740
		[1009]	0x00	unsigned char{data}@0x2741
		[1010]	0xc2	unsigned char{data}@0x2742
		[1011]	0x16	unsigned char{data}@0x2743
		[1012]	0x00	unsigned char{data}@0x2744  - sleep
		[1013]	0x02	unsigned char{data}@0x2745 - Xoff
		[1014]	0x30	unsigned char{data}@0x2746 - unknown
		[1015]	0x20	unsigned char{data}@0x2747 - unkown
		[1016]	0xdd	unsigned char{data}@0x2748 - ??
		[1017]	0x52	unsigned char{data}@0x2749
		[1018]	0x27	unsigned char{data}@0x274a
		[1019]	0x00	unsigned char{data}@0x274b
		[1020]	0x00	unsigned char{data}@0x274c
		[1021]	0x00	unsigned char{data}@0x274d
		[1022]	0x00	unsigned char{data}@0x274e
		[1023]	0x00	unsigned char{data}@0x274f

So .. nothing useful that I can find with a Burst Write.

0 Michael Letsky over 12 years ago in reply to Michael Letsky

Prodigy 105 points

After a single write of 16 bytes :

		[992]	0x00	unsigned char{data}@0x272a
		[993]	0x06	unsigned char{data}@0x272b
		[994]	0x20	unsigned char{data}@0x272c
		[995]	0x06	unsigned char{data}@0x272d
		[996]	0x20	unsigned char{data}@0x272e
		[997]	0x00	unsigned char{data}@0x272f
		[998]	0x06	unsigned char{data}@0x2730
		[999]	0x20	unsigned char{data}@0x2731
		[1000]	0x06	unsigned char{data}@0x2732
		[1001]	0x20	unsigned char{data}@0x2733
		[1002]	0x00	unsigned char{data}@0x2734
		[1003]	0x00	unsigned char{data}@0x2735
		[1004]	0x01	unsigned char{data}@0x2736
		[1005]	0x4d	unsigned char{data}@0x2737
		[1006]	0x00	unsigned char{data}@0x2738
		[1007]	0x00	unsigned char{data}@0x2739
		[1008]	0x01	unsigned char{data}@0x273a
		[1009]	0x4d	unsigned char{data}@0x273b
		[1010]	0x00	unsigned char{data}@0x273c
		[1011]	0x00	unsigned char{data}@0x273d
		[1012]	0x00	unsigned char{data}@0x273e
		[1013]	0x1f	unsigned char{data}@0x273f
		[1014]	0xe0	unsigned char{data}@0x2740
		[1015]	0x16	unsigned char{data}@0x2741
		[1016]	0x00	unsigned char{data}@0x2742
		[1017]	0x01	unsigned char{data}@0x2743
		[1018]	0xbe	unsigned char{data}@0x2744
		[1019]	0x02	unsigned char{data}@0x2745
		[1020]	0x30	unsigned char{data}@0x2746
		[1021]	0x20	unsigned char{data}@0x2747
		[1022]	0xdd	unsigned char{data}@0x2748
		[1023]	0x52	unsigned char{data}@0x2749

/etc... RF (Read-Only)

/etc... RF (Read-Only) Forum

CC1101 not sending a packet ?