Texas Instruments SimpleLink CC2620 Technical Reference Manual page 1591

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For both commands, after the packet has been transmitted, the frequency synthesizer is turned off when
the command ends if pktConf.bFsOff is 1. If pktConf.bFsOff is 0, the synthesizer keeps running, so that
the command must either be followed by an RX or TX command (which operate on the same frequency)
or a CMD_FS_OFF command to turn off the synthesizer.
The end statuses for use with CMD_PROP_TX and CMD_PROP_TX_ADV are listed in
This status decides the next operation, see
Table 23-149. End of Radio CMD_PROP_TX and CMD_PROP_TX_ADV Commands
Condition
Transmitted packet
Received CMD_STOP while transmitting packet and finished transmitting
packet
Received CMD_ABORT while transmitting packet
Observed illegal parameter
Command sent without setting up the radio in a supported mode using
CMD_PROP_RADIO_SETUP or CMD_RADIO_SETUP
Command sent without the synthesizer being programmed
TX underflow observed during operation
23.7.5.3.1 Standard Transmit Command, CMD_PROP_TX
The CMD_PROP_TX command transmits a packet with the format from
are as given in Table
The packet transmission starts at the given start trigger, with a fixed delay. The modem first transmits the
preamble and sync word as configured. The sync word to transmit is given in the syncWord field, in the
LSBs if less than 32 bits are used. The word is transmitted in the bit order programmed in the radio.
If pktConf.bVarLen is 1, a length byte equal to the value of pktLen is sent next. After this, the content of
the buffer pointed to by pPkt is sent. This buffer consists of the number of bytes given in pktLen. If an
address byte as shown in
If pktConf.bUseCrc is 1, a CRC is calculated and transmitted at the end. The number of CRC bits,
polynomial, and initialization are as configured in the radio. The CRC is calculated over the length byte (if
present) and over the entire contents of the buffer pointed to by pPkt.
If whitening is enabled, the optional length byte, the entire contents of the buffer pointed to by pPkt, and
the CRC are subject to whitening. The whitening is done after the data has been used for CRC
calculation.
23.7.5.3.2 Advanced Transmit Command, CMD_PROP_TX_ADV
The CMD_PROP_TX_ADV command transmits a packet with the format from
case, the user can set up packets as in
as proprietary mode) and the synthesizer programmed using CMD_FS. The parameters are as given in
Table 23-138.
The packet transmission starts at the given start trigger, with a fixed delay. Alternatively, if
startConf.bExtTXTrig is 1, the packet transmission starts on an external trigger to the RF core. The trigger
is identified as one of the inputs to the radio timer, and can be configured as rising edge, falling edge, or
both edges through the startConf parameter. The system must ensure that this trigger comes after the
start trigger, otherwise it is lost. The minimum delay after the start trigger is implementation-dependent
and subject to characterization.
The modem first transmits the preamble and sync word as configured. If preTrigger is not TRIG_NOW, the
configured preamble is repeated until that trigger (seen in combination with preTime) has been observed.
After the trigger is observed, the configured preamble under transmission finishes before the sync word
transmission starts. If preTrigger is TRIG_NOW, the preamble is sent once, followed by the sync word.
The sync word to transmit is given in the syncWord field, in the LSBs if less than 32 bits are used, and is
transmitted in the bit order programmed in the radio.
SWCU117C – February 2015 – Revised September 2015
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Section
23-133.
Figure 23-9 is needed, it must be sent as the first payload byte.
Figure
Copyright © 2015, Texas Instruments Incorporated
23.7.5.1.
Status Code
PROP_DONE_OK
PROP_DONE_STOPPED
PROP_DONE_ABORT
PROP_ERROR_PAR
PROP_ERROR_NO_SETUP
PROP_ERROR_NO_FS
PROP_ERROR_TXUNF
23-9. The radio must be set up in a compatible mode (such
Proprietary Radio
Table 23-149.
Result
TRUE
FALSE
ABORT
ABORT
ABORT
ABORT
ABORT
Table 23-137. The parameters
Figure 23-10. As a special
Radio
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