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nrfxlib API 2.7.99
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nrfxlib API 2.7.99
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| uint8_t sdc_hci_cmd_le_set_ext_scan_enable | ( | const sdc_hci_cmd_le_set_ext_scan_enable_t * | p_params | ) |
#include <softdevice_controller/include/sdc_hci_cmd_le.h>
LE Set Extended Scan Enable.
The description below is extracted from Core_v5.4, Vol 4, Part E, Section 7.8.65
The HCI_LE_Set_Extended_Scan_Enable command is used to enable or disable scanning for both legacy and extended advertising PDUs.
The Enable parameter determines whether scanning is enabled or disabled. If it is set to 0x00, the remaining parameters shall be ignored.
If Enable is set to 0x01 and the Host has not issued the HCI_LE_Set_- Extended_Scan_Parameters command, the Controller shall either use vendor- specified parameters or return the error code Command Disallowed (0x0C).
The Filter_Duplicates parameter controls whether the Link Layer should filter out duplicate advertising reports (filtering duplicates enabled) to the Host or if the Link Layer should generate advertising reports for each packet received (filtering duplicates disabled). See [Vol 6] Part B, Section 4.4.3.5.
If the Filter_Duplicates parameter is set to 0x00, all advertisements received from advertisers shall be sent to the Host in advertising report events.
If the Filter_Duplicates parameter is set to 0x01, duplicate advertisements should not be sent to the Host in advertising report events until scanning is disabled.
If the Filter_Duplicates parameter is set to 0x02, duplicate advertisements in a single scan period should not be sent to the Host in advertising report events; this setting shall only be used if both Period and Duration are non-zero. If Filter_Duplicates is set to 0x02 and either Period or Duration to zero, the Controller shall return the error code Invalid HCI Command Parameters (0x12).
If the Duration parameter is zero or both the Duration parameter and Period parameter are non-zero, the Controller shall continue scanning until scanning is disabled by the Host issuing an HCI_LE_Set_Extended_Scan_Enable command with the Enable parameter set to 0x00 (Scanning is disabled). The Period parameter shall be ignored when the Duration parameter is zero.
If the Duration parameter is non-zero and the Period parameter is zero, the Controller shall continue scanning until the duration specified in the Duration parameter has expired. If both the Duration and Period parameters are non-zero and the Duration is greater than or equal to the Period, the Controller shall return the error code Invalid HCI Command Parameters (0x12).
When the Duration and Period parameters are non-zero, the Controller shall scan for the duration of the Duration parameter within a scan period specified by the Period parameter. After the scan period has expired, a new scan period shall begin and scanning shall begin again for the duration specified. The scan periods continue until the Host disables scanning.
If the HCI_LE_Set_Extended_Scan_Enable command with Enable set to 0x01 is sent while scanning is already enabled, the timers used for duration and period are reset to the new parameter values and a new scan period is started. Any change to the Filter_Duplicates setting or the random address shall take effect.
Disabling scanning when it is disabled has no effect.
Note: The duration of a scan period refers to the time spent scanning on both the primary and secondary advertising physical channels. However, expiry of the duration does not prevent the Link Layer from scanning for and receiving auxiliary packets of received advertisements.
If Enable is set to 0x01, the scanning parameters' Own_Address_Type parameter is set to 0x00 or 0x02, and the device does not have a public address, the Controller should return an error code which should be Invalid HCI Command Parameters (0x12).
If Enable is set to 0x01, the scanning parameters' Own_Address_Type parameter is set to 0x01 or 0x03, and the random address for the device has not been initialized using the HCI_LE_Set_Random_Address command, the Controller shall return the error code Invalid HCI Command Parameters (0x12).
Event(s) generated (unless masked away): When the HCI_LE_Set_Extended_Scan_Enable command has completed, an HCI_Command_Complete event shall be generated.
Zero or more LE Extended Advertising Reports are generated by the Controller based on any advertising packets received and the duplicate filtering in effect. More than one advertising packet may be reported in each HCI_LE_- Extended_Advertising_Report event.
At the end of a single scan (Duration non-zero but Period zero), an HCI_LE_- Scan_Timeout event shall be generated.
| [in] | p_params | Input parameters. |
| 0 | if success. |
1.9.6