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Receiving empty packets when using fixed length cofiguration (CC1350)

HS
Prodigy 75 points
Other Parts Discussed in Thread: CC1350, CC2650, CC1310

I'm running the simplelink_easylink example (v.1.1.0) for CC13xx using 1 EB as TX and the other as RX. For testing I just opened a UART and write the received bytes.

In the original configuration everything works as expected. However when I switch to fixed length (RF_cmdPropTx.pktConf.bVarLen = 0x0 and RF_cmdPropRx.pktConf.bVarLen = 0x0) I get empty (all zero) packets.

I'm not sure whether it's a problem with the receiver buffer (queue) or the radio. I'm grateful for any idea on how to debug it

  • 0
    TI__Guru**** 317180 points
    Did you set maxPktLen to the correct value in CMD_PROP_RX? If this is not set the expected packet is larger than the size of rxDataEntryBuffer.
  • 0 in reply to TER
    Prodigy 75 points

    Thanks for your reply. I manage to receive data now.

    However I'm still not getting the correct data from 4-gfsk packets. I'm sending: 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D but receiving something like AA 99 AA A9 A6 A5 A6 A5 AA A9 AA A9 A6 A5. I attached the config I'm using below. Using 2-GFSK I get the correct values.

    // Overrides for CMD_PROP_RADIO_DIV_SETUP
uint32_t pOverrides[] =
{
// override_synth.xml

    HW32_ARRAY_OVERRIDE(0x6088,1),
    (uint32_t)0x0000001A,
    ADI_HALFREG_OVERRIDE(0,61,0xF,0xD),
    HW32_ARRAY_OVERRIDE(0x4038,1),
    (uint32_t)0x0000003A,
    HW_REG_OVERRIDE(0x4020,0x7F00),
    HW_REG_OVERRIDE(0x4064,0x0040),
    (uint32_t)0x684A3,
    (uint32_t)0xC0040141,
    (uint32_t)0x0533B107,
    (uint32_t)0xA480583,
    (uint32_t)0x7AB80603,
    ADI_REG_OVERRIDE(1,4,0x1F),
    ADI_HALFREG_OVERRIDE(1,7,0x4,0x4),
    HW_REG_OVERRIDE(0x6084,0x35F1),
    (uint32_t)0x38883,
    (uint32_t)0xFFFFFFFF,
	ADI_REG_OVERRIDE(0,12,0xF9), // full output power
};


// CMD_PROP_RADIO_DIV_SETUP
rfc_CMD_PROP_RADIO_DIV_SETUP_t RF_cmdPropRadioDivSetup =
{
    .commandNo 					= 0x3807,
    .status 					= 0x0000,
    .pNextOp 					= 0, /*INSERT APPLICABLE POINTER: (uint8_t*)&xxx */
    .startTime 					= 0x00000000,
    .startTrigger.triggerType 	= 0x0,
    .startTrigger.bEnaCmd 		= 0x0,
    .startTrigger.triggerNo 	= 0x0,
    .startTrigger.pastTrig 		= 0x0,
    .condition.rule 			= 0x1,
    .condition.nSkip 			= 0x0,

    .modulation.modType 		= 0x1, // 1=GFSK
    .modulation.deviation		= 0xf8,

	// 62kbps
	.symbolRate.preScale        = 0xb,
	.symbolRate.rateWord        = 0x7465,
	// 124 kbps
	//.symbolRate.preScale = 0xe,
	//.symbolRate.rateWord = 0x12846,

    .symbolRate.bPdifDecim		= 0x0,
    .symbolRate.pdifDecim 		= 0x0,

    .rxBw = 0x4,  // modified

    .preamConf.nPreamBytes 		= 0x4,
    .preamConf.preamMode 		= 0x0,

    .formatConf.nSwBits 		= 0x10,
    .formatConf.bBitReversal 	= 0x0,
    .formatConf.bMsbFirst 		= 0x1, 
    .formatConf.fecMode 	= 0x9, // 9=4-GFSK
    .formatConf.bDigitalAgc 	= 0x0,
    .formatConf.whitenMode 		= 0x0,  // modified

    .config.frontEndMode 	= 0x0,
    .config.biasMode 		= 0x1, 
    .config.bNoAdi0Setup 	= 0x0,
    .config.bNoAdi0Trim 	= 0x0,
    .config.bNoAdi0Ovr 		= 0x0,
    .config.bNoAdi1Setup 	= 0x0,
    .config.bNoAdi1Trim 	= 0x0,
    .config.bNoAdi1Ovr 		= 0x0,
    .config.bNoFsPowerUp 	= 0x0,
    .config.lnaIbBoost 		= 0x0,

    .txPower.IB = 0x3f,
    .txPower.GC = 0x0,
    .txPower.boost = 0x0,
    .txPower.tempCoeff = 0x0,
    .pRegOverride = pOverrides,
    .centerFreq = 0x0364,
    .intFreq = 0x8000,
    .loDivider = 0x05,
};

// CMD_FS
rfc_CMD_FS_t RF_cmdFs =
{
	.commandNo                  = 0x0803,
	.status                     = 0x0000,
	.pNextOp                    = 0,  // INSERT APPLICABLE POINTER: (uint8_t*)&xxx
	.startTime                  = 0x00000000,
	.startTrigger.triggerType   = 0x0,
	.startTrigger.bEnaCmd       = 0x0,
	.startTrigger.triggerNo     = 0x0,
	.startTrigger.pastTrig      = 0x0,
	.condition.rule             = 0x1,
	.condition.nSkip            = 0x0,

	.frequency                  = 0x360, // Frequency
	.fractFreq                  = 0x0, 

	.synthConf.bTxMode          = 0x0,
	.synthConf.refFreq          = 0x0,
	.calibConf.bOverrideCalib   = 0x0,
	.calibConf.bSkipTdcCalib    = 0x0,
	.calibConf.bSkipCoarseCalib = 0x0,
	.calibConf.bSkipMidCalib    = 0x0,
	.calibConf.coarsePrecal     = 0x0,
	.midPrecal                  = 0x00,
	.ktPrecal                   = 0x00,
	.tdcPrecal                  = 0x0000,
};


// CMD_PROP_TX
rfc_CMD_PROP_TX_t RF_cmdPropTx =
{
    .commandNo = 0x3801,
    .status = 0x0000,
    .pNextOp = 0, /*INSERT APPLICABLE POINTER: (uint8_t*)&xxx */
    .startTime = 0x00000000,
    .startTrigger.triggerType = 0x0,
    .startTrigger.bEnaCmd = 0x0,
    .startTrigger.triggerNo = 0x0,
    .startTrigger.pastTrig = 0x0,
    .condition.rule = 0x1,
    .condition.nSkip = 0x0,
    .pktConf.bFsOff = 0x0,
    .pktConf.bUseCrc = 0x0,
    .pktConf.bVarLen = 0x0, 	// varlen
    .pktLen = 0x0e, //overwritten in Txtask!
    .syncWord = 0x000051de,
    .pPkt = 0, /*INSERT APPLICABLE POINTER: (uint8_t*)&xxx */
};

// CMD_PROP_RX
rfc_CMD_PROP_RX_t RF_cmdPropRx =
{
    .commandNo = 0x3802,
    .status = 0x0000,
    .pNextOp = 0, //INSERT APPLICABLE POINTER: (uint8_t*)&xxx
    .startTime = 0x00000000,
    .startTrigger.triggerType = 0x0,
    .startTrigger.bEnaCmd = 0x0,
    .startTrigger.triggerNo = 0x0,
    .startTrigger.pastTrig = 0x0,
    .condition.rule = 0x1,
    .condition.nSkip = 0x0,

    .pktConf.bFsOff = 0x0,
    .pktConf.bRepeatOk = 0x0, 
    .pktConf.bRepeatNok = 0x0, 
    .pktConf.bUseCrc = 0x0,
    .pktConf.bVarLen = 0x0,	// varlen
    .pktConf.bChkAddress = 0x0,
    .pktConf.endType = 0x0,
    .pktConf.filterOp = 0x1,

    .rxConf.bAutoFlushIgnored = 0x0,
    .rxConf.bAutoFlushCrcErr = 0x0,
    .rxConf.bIncludeHdr = 0x1,
    .rxConf.bIncludeCrc = 0x0,
    .rxConf.bAppendRssi = 0x0,
    .rxConf.bAppendTimestamp = 0x0,
    .rxConf.bAppendStatus = 0x0,

    .syncWord = 0x000051de,
    .maxPktLen = 0xe,  
    .address0 = 0xaa,
    .address1 = 0xbb,
    .endTrigger.triggerType = 0x1,
    .endTrigger.bEnaCmd = 0x0,
    .endTrigger.triggerNo = 0x0,
    .endTrigger.pastTrig = 0x0,
    .endTime = 0x00000000,
    .pQueue = 0, /*INSERT APPLICABLE POINTER: (dataQueue_t*)&xxx */
    .pOutput = 0, /*INSERT APPLICABLE POINTER: (uint8_t*)&xxx */
};

  • 0 in reply to HS
    Genius 5820 points
    where did you find the simplelink_easylink example (v.1.1.0) for CC1350? We have samples but no docs or software and are anxious to get started.
  • 0 in reply to pixbroker
    TI__Guru**** 317180 points
    We haven't started to look into finding the optimal settings for 4GFSK. I assume that some AGC settings and the sync threshold has to be tuned to get good performance. Out of the box using SmartRF Studio I managed to get link but I typically get bit error in a couple of bytes.
  • 0 in reply to TER
    Prodigy 75 points

    Thank you. Is it possible to modify the sync threshold and AGC setting via command options or override?

  • 0 in reply to HS
    TI__Guru**** 317180 points
    The plan is to include support for changing these settings in SmarRF Studio and get Studio to export the required overrides.
  • 0 in reply to TER
    Prodigy 75 points

    Ok thanks. Since it is currently crucial to further development for us, is it possible to set the override manually?  I guess bascially I just need the address and values...

  • 0 in reply to HS
    TI__Guru**** 317180 points
    What is the volume potential behind this request? If you want to do this offline, please send me a friend request.
  • 0 in reply to TER
    Prodigy 140 points

    May I bring up this issue again?
    The manual of the CC26xx/CC13xx says that the parameters of pRegOverride for the CPE command CMD_RADIO_SETUP are available via SmartRF Studio or via TI. If I understood correctly, SmartRF Studio is still lacking this feature. So, where can I get these values from?

    My other thread concerning this topic: e2e.ti.com/.../1629656

    Thank you,
    Dominik

  • 0 in reply to dominik
    TI__Guru* 79271 points

    Hi

    The overrides have been available in Studio for a long time, but for CC1350 genfsk you will need to use the CMD_PROP_RADIO_DIV_SETUP instead of the CMD_PROP_RADIO_SETUP. Pressing on the code export button you will get a list with the overrides as shown below:

    #include <driverlib/rf_mailbox.h>

    #include <driverlib/rf_common_cmd.h>

    #include <driverlib/rf_prop_cmd.h>

    #include <ti/drivers/rf/RF.h>

    #include <rf_patches/rf_patch_cpe_genfsk.h>

    #include "smartrf_settings.h"

     

    // TI-RTOS RF Mode Object

    RF_Mode RF_prop =

    {

    .rfMode = RF_MODE_PROPRIETARY,

    .cpePatchFxn = &rf_patch_cpe_genfsk,

    .mcePatchFxn = 0,

    .rfePatchFxn = 0,

    };

    // Overrides for CMD_PROP_RADIO_DIV_SETUP

    uint32_t pOverrides[] =

    {

    // override_synth.xml

    HW32_ARRAY_OVERRIDE(0x6088,1),

    (uint32_t)0x0000001A,

    ADI_HALFREG_OVERRIDE(0,61,0xF,0xD),

    HW32_ARRAY_OVERRIDE(0x4038,1),

    (uint32_t)0x0000003A,

    HW_REG_OVERRIDE(0x4020,0x7F00),

    HW_REG_OVERRIDE(0x4064,0x0040),

    (uint32_t)0x684A3,

    (uint32_t)0xC0040141,

    (uint32_t)0x0533B107,

    (uint32_t)0xA480583,

    (uint32_t)0x7AB80603,

    ADI_REG_OVERRIDE(1,4,0x9F),

    ADI_HALFREG_OVERRIDE(1,7,0x4,0x4),

    HW_REG_OVERRIDE(0x6084,0x35F1),

    (uint32_t)0x00038883,

    (uint32_t)0x00FB88A3,

    // TX power override

    ADI_REG_OVERRIDE(0,12,0xF9),

    (uint32_t)0xFFFFFFFF,

    };

    Siri

  • 0 in reply to Siri
    Prodigy 140 points

    Thank you for the code and the reply!

    I just had a look into the CC1350 configurations in SmartRF Studio 7 (2.1.0) . There, the Command View contains a button "Code Export". I am using a CC2650 for which this button is missing. I should try to get a newer version of SmartRF Studio.

    I suspect, the overrides of the CC1350 for CMD_PROP_RADIO_SETUP cannot be used in conjunction with the CC2650 and CMD_RADIO_SETUP, right?

    Dominik

  • 0 in reply to dominik
    TI__Guru**** 317180 points
    The newest TRM (www.ti.com/.../swcu117) list which commands that are valid for which radio.
  • 0 in reply to TER
    Genius 5820 points
    This link doesn't seem to work.
  • 0 in reply to pixbroker
    TI__Mastermind 36375 points
    We do have an example of how to get GenFSK up and running on CC2650 also. What data rates would you need?

    Thomas
  • 0 in reply to TA12012
    TI__Guru**** 317180 points
    Sorry, an extra ) got in in the in in the copy/ paste process, try www.ti.com/.../swcu117c.pdf. This is now linked to the CC1310 page etc.
  • 0 in reply to TER
    Prodigy 140 points

    Thanks, the new TRM is much more informative on that subject. Unfortunately, the SmartRF Studio 7 (v.. 2.2.0) still lacks a code export for the CC2650 (missing button "Code Export"). However, I found some XML files in the Smart RF folder under .\config\xml\cc2650_ieee_15_4\overrides\.