OOK with CC430

Pere Tuset

Other Parts Discussed in Thread: CC430F5137, TEST2, CC1101

Hi,

I have my own board with CC430F5137 working flawlessly at 433 MHz with 2-FSK and MSK at 250 kbps. However when I change to OOK at 250 kbps I am not able to receive anything on the other boards. I've used the SmartRF studio to obtain the proper register values, but it does not seem to work. I think I am overlooking something obvious but right now I cannot find what, so I'm stuck. Could you please check my register configuration settings and provide some feedback? Thanks in advance!

0x1E, // IOCFG0 GDO2 Output Configuration

0x29, // IOCFG2 GDO1 Output Configuration

0x07, // FIFOTHR RX FIFO and TX FIFO Thresholds

0x84, // PKTCTRL1 Packet Automation Control

0x05, // PKTCTRL0 Packet Automation Control

0x0F, // FSCTRL1 Frequency Synthesizer Control

0x00, // FSCTRL0 Frequency Synthesizer Control

0x10, // FREQ2 Frequency Control Word, High Byte

0xA8, // FREQ1 Frequency Control Word, Middle Byte

0xA0, // FREQ0 Frequency Control Word, Low Byte

0x2D, // MDMCFG4 Modem Configuration

0x3B, // MDMCFG3 Modem Configuration

0x33, // MDMCFG2 Modem Configuration

0x22, // MDMCFG1 Modem Configuration

0x10, // MDMCFG0 Modem Configuration

0x62, // DEVIATN Modem Deviation Setting

0x30, // MCSM0 Main Radio Control State Machine Configuration

0x1D, // FOCCFG Frequency Offset Compensation Configuration

0x1C, // BSCFG Bit Synchronization Configuration

0xC7, // AGCCTRL2 AGC Control

0x00, // AGCCTRL1 AGC Control

0xB0, // AGCCTRL0 AGC 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

0x88, // TEST2 Various Test Settings

0x31, // TEST1 Various Test Settings

0x09 // TEST0 Various Test Settings

Kind regards,

Pere

over 12 years ago

0 Sverre over 12 years ago

TI__Mastermind 39860 points

See design note DN022. www.ti.com/lit/swra215. This app note describes how to generate the optimum register settings for OOK.

0 Pere Tuset over 12 years ago in reply to Sverre

Intellectual 545 points

Hi Sverre, thanks for your reply. I've already checked some of the proposed values from the DN022 with no luck at all. For example, I've tried to change:

AGCCTRL2 = 0x04

AGCCTRL1 = 0x00

AGCTRL0 = 0x91

As well as:

FIFOTHR=0x07

FREND1 = 0xB6

TEST2=0x88

TEST1=0x31

The devices are rearby but I've added a 30 dB attenuator to one of them to ensure that the AGC does not saturate. Do I need to try with the other values of AGCTLx as well? Even with bad register configuration, shouldn't I receive something? I will check tomorrow with a spectrum analyzer if the transmitter is sending something over the air, but since the driver works just fine with FSK/MSK I was assuming the same for ASK/OOK. Anything else I may be overlooking?

Kind regards,

Pere

0 Sverre over 12 years ago in reply to Pere Tuset

TI__Mastermind 39860 points

Agree that with "bad register" configuration you should still receive something. I know for some of the RF signal generators we use in our lab we have to invert the data being transmitted in order for CC1101/CC430 to receive the data correctly. Maybe you have a similar "problem"?

Will run a test in our lab tomorrow @250 kbps.

0 Pere Tuset over 12 years ago in reply to Sverre

Intellectual 545 points

Sverre, I have checked with a spectrum analyzer and I see that power is coming out of the antenna, so that should not be the problem. In addition, I am transmitting between two CC430-based boards which are identical, so that should not make a difference either. Any other suggestion?

Pere

0 Pere Tuset over 12 years ago in reply to Pere Tuset

Intellectual 545 points

Sverre, could you or any of your colleages please provide a working register configuration for OOK regardless of data rate and frequency? For instance 868 MHz and 2.4 kbps would suit me fine. Of course if you have something at 433 MHz and close to 250 kbps I would be more happy. With that I can try to find out why it is not working as it is right not. Thanks in advance!

Regards,

Pere

0 Sverre over 12 years ago in reply to Pere Tuset

TI__Mastermind 39860 points

Settings below are for 125 kbps. RF frequency is 868 MHz. RX BW = 406 kHz. Sensitivity measured as -95 dBm.

Settings are also ok for operation at 433 MHz - simply change FREQ2,1,0

FIFOTHR=0x7
SYNC1=0xD3
SYNC0=0x91
PKTLEN=0x14
PKTCTRL1=0x4
PKTCTRL0=0x0
ADDR=0x0
CHANNR=0x0
FSCTRL1=0xB
FSCTRL0=0x0
FREQ2=0x21
FREQ1=0x62
FREQ0=0x76
MDMCFG4=0x4C
MDMCFG3=0x3B
MDMCFG2=0x31
MDMCFG1=0x2
MDMCFG0=0xF8
DEVIATN=0x15
MCSM2=0x7
MCSM1=0x30
MCSM0=0x18
FOCCFG=0x1C
BSCFG=0x20
AGCCTRL2=0x87
AGCCTRL1=0x0
AGCCTRL0=0xB2
WOREVT1=0x87
WOREVT0=0x6B
WORCTRL=0xFB
FREND1=0xB6
FREND0=0x11
FSCAL3=0xEA
FSCAL2=0x2A
FSCAL1=0x0
FSCAL0=0x1F
RCCTRL1=0x41
RCCTRL0=0x0
FSTEST=0x59
PTEST=0x7F
AGCTEST=0x3F
TEST2=0x88
TEST1=0x31
TEST0=0x9

0 Pere Tuset over 12 years ago in reply to Sverre

Intellectual 545 points

Perfect, thanks! I will give it a try and give you some feedback.

Regards,

Pere

0 Pere Tuset over 12 years ago in reply to Pere Tuset

Intellectual 545 points

Sverre,

I tried your proposed configuration settings without positive results. Your proposed configuration (the important registers) was the following:

PKTCTRL0 = 0x00 // CRC_DISABLED + FIXED_LENGTH
MDMCFG2 = 0x31 // 15/16 SYNC WORD
MDMCFG1 = 0x02 // 2 PREAMBLE BYTE
MDMCFG0 = 0xF8 // DIFFERENT CHANNEL SPACING
MCSM0 = 0x18 // CALIBRATE IDLE->RX

I changed to 433 MHz maintaining the data rate. I also changed the configuration because I need CRC and variable packet length. In addition I adjusted the sync word and preamble length. The remaining settings were left unchanged or as default upon chip reset.

PKTCTRL0 = 0x05 // CRC_ENABLED + VARIABLE_LENGTH
MDMCFG2 = 0x33 // 30/32 SYNC WORD
MDMCFG1 = 0x22 // 4 PREAMBLE BYTE
MDMCFG0 = 0x10 // DIFFERENT CHANNEL SPACING
MCSM0 = 0x38 // CALIBRATE 4th TIME TX/RX->IDLE

With such changes I am unable to receive anything at all. The devices are close to each other but there is a 30dB attenuator in one of them to ensure that the AGC does not saturate. I've also checked with a spectrum analyzer and there is power coming out of the antenna, so that is not the problem. I also tried to reduce the sync word and preamble length to your proposed settings without observing any difference.

As you can imagine, I am at complete loss. The CC430/CC1101 should be able to go up to 250 kbps with OOK/ASK but I cannot be able to get it working. Can you suggest other aspects to check or put me in contact with a FAE?

Thanks in advance!

Regards,

Pere

0 Sverre over 12 years ago in reply to Pere Tuset

TI__Mastermind 39860 points

Tested 250 kbps, OOK on my desk. Used 2 of our evaluation modules and SmartRF Studio. Link is established using attached XML file, which can be imported into SmartRF Studio.

Note: I did not do any optimization work w.r.t to AGC settings.

Fullscreen 7220.OOK Register Settings.xml Download

<?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>AGCCTRL0</Name>
            <Value>0xb2</Value>
        </Register>
        <Register>
            <Name>AGCCTRL1</Name>
            <Value>0x00</Value>
        </Register>
        <Register>
            <Name>AGCCTRL2</Name>
            <Value>0xc7</Value>
        </Register>
        <Register>
            <Name>BSCFG</Name>
            <Value>0x1c</Value>
        </Register>
        <Register>
            <Name>DEVIATN</Name>
            <Value>0x62</Value>
        </Register>
        <Register>
            <Name>FOCCFG</Name>
            <Value>0x1d</Value>
        </Register>
        <Register>
            <Name>FREND0</Name>
            <Value>0x11</Value>
        </Register>
        <Register>
            <Name>FREND1</Name>
            <Value>0xb6</Value>
        </Register>
        <Register>
            <Name>FREQ0</Name>
            <Value>0x76</Value>
        </Register>
        <Register>
            <Name>FREQ1</Name>
            <Value>0x62</Value>
        </Register>
        <Register>
            <Name>FREQ2</Name>
            <Value>0x21</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>0xea</Value>
        </Register>
        <Register>
            <Name>FSCTRL1</Name>
            <Value>0x0c</Value>
        </Register>
        <Register>
            <Name>IOCFG0</Name>
            <Value>0x06</Value>
        </Register>
        <Register>
            <Name>LQI</Name>
            <Value>0x7f</Value>
        </Register>
        <Register>
            <Name>MARCSTATE</Name>
            <Value>0x01</Value>
        </Register>
        <Register>
            <Name>MCSM0</Name>
            <Value>0x18</Value>
        </Register>
        <Register>
            <Name>MDMCFG2</Name>
            <Value>0x33</Value>
        </Register>
        <Register>
            <Name>MDMCFG3</Name>
            <Value>0x3b</Value>
        </Register>
        <Register>
            <Name>MDMCFG4</Name>
            <Value>0x2d</Value>
        </Register>
        <Register>
            <Name>PA_TABLE1</Name>
            <Value>0x50</Value>
        </Register>
        <Register>
            <Name>PKTCTRL0</Name>
            <Value>0x05</Value>
        </Register>
        <Register>
            <Name>RSSI</Name>
            <Value>0x80</Value>
        </Register>
        <Register>
            <Name>TEST0</Name>
            <Value>0x09</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_chkHGMorBYP">2</Property>
        <Property role="46" name="m_cmbEmRevs">-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">0</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">2</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">0</Property>
        <Property role="44" name="m_chkAddress">0</Property>
        <Property role="44" name="m_chkFifoAutoFlush">0</Property>
        <Property role="42" name="m_edtAddress"></Property>
        <Property role="46" name="m_cmbLengthConfig">1</Property>
        <Property role="42" name="m_edtLengthConfig">255</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 Pere Tuset over 12 years ago in reply to Sverre

Intellectual 545 points

Sverre, the issue has now been solved and I am able to use OOK at 250 kbps. Many thanks for your patience and kind support. For everyone reading this thread with a similar problem, READ THE F****** MANUAL (PAGE 33) AND REMEMBER THAT THE PATABLE IS LOST EVERYTIME YOU PUT THE RADIO CORE TO SLEEP!

Kind regards,

Pere

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