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How to configure the BLE Central device to function in a particular Scan and Connection channel?
There are APIs CyBle_GapGetChannelMap() and CyBle_GapcSetHostChannelClassification() for configuring Data Channel mapping, but no API is available to configure the Scan Channel mapping. However, Scan Channel mapping can be done by writing to the specific BLE_BLELL_SCAN_CONFIG register. To change the Scan Channel map configuration, change the 13-, 14- and 15-bits of BLE_BLELL_SCAN_CONFIG register.
Table 1. BLE_BLELL_SCAN_CONFIG Register Bit Mapping
Advertising channels that are enabled for scanning operation. Bit 15: setting 1 - enables channel 39 for use. Bit 14: setting 1 - enables channel 38 for use. Bit 13: setting 1 - enables channel 37 for use. Default Value: 7 (All are ‘1’)