Mlmeccarequest - NXP Semiconductors MKW01 Reference Manual

gErrorBusy_c
gErrorNoValidCondition_c
Usage
Call the function with the selected channel to be scanned.
MLMEScanRequest(u8ChannelToScan);
Be sure to enter a valid channel. Be sure to switch back to the previous
channel after receiving the result.
3.12

MLMECcaRequest

This function creates a CCA request message and sends it to the PHY. CCA is performed on the active
channel (set with MLMESetChannelRequest). The result will be received in a message passed through the
SMAC to application management SAP.
Arguments
None
Returns
gErrorNoValidCondition_c
gErrorBusy_c
gErrorNoError_c
Usage
Call the function. The application can store the return value in a smacErrors_t variable and handle the error
in case it occurs. For example, if the return value is gErrorBusy_c, the application can wait on this value
until SMAC becomes idle.
smacErrors_t ReturnValue;
ReturnValue = MLMECcaRequest();
//Handle return value
...
Implementation
This function creates a message for PHY requesting a CCA on the currently selected channel. After
passing the message through the SAP, SMAC changes it's state to
MKW01 Simple Media Access Controller (SMAC) Reference Manual, Rev. 0.0
Freescale Semiconductor
The radio is performing another action.
The MKW01 SMAC has not been initialized.
NOTE
The MKW01 SMAC has not been initialized.
Either SMAC or PHY is busy and can not process the request.
Everything is normal and the request was processed.
mSmacStatePerformingCca_c
Primitives
.
3-29