use cypress CYBLE4234 to implement the bluetooth keyboard function

BLE_HID_Keyboard
................\BLE_HID_Keyboard.cydsn
................\......................\Backup
................\......................\......\BLE_HID_Keyboard-000._3.1_Nightly_Build_1456.zip
................\......................\bas.c
................\......................\bas.h
................\......................\BLE_HID_Keyboard-000.cywrk
................\......................\BLE_HID_Keyboard-000.cywrk.HERRY
................\......................\BLE_HID_Keyboard.cycdx
................\......................\BLE_HID_Keyboard.cydwr
................\......................\BLE_HID_Keyboard.cyfit
................\......................\BLE_HID_Keyboard.cyprj
................\......................\BLE_HID_Keyboard.cyprj.HERRY
................\......................\BLE_HID_Keyboard.pdf
................\......................\BLE_HID_Keyboard.rpt
................\......................\BLE_HID_Keyboard.svd
................\......................\BLE_HID_Keyboard_timing.html
................\......................\codegentemp
................\......................\...........\Advertising_LED.c
................\......................\...........\Advertising_LED.h
................\......................\...........\Advertising_LED_aliases.h
................\......................\...........\bitstream.txt
................\......................\...........\BLE.c
................\......................\...........\BLE.h
................\......................\...........\BLE_bas.c
................\......................\...........\BLE_bas.h
................\......................\...........\BLE_bless_isr.c
................\......................\...........\BLE_bless_isr.h
................\......................\...........\BLE_dis.c
................\......................\...........\BLE_dis.h
................\......................\...........\BLE_eventHandler.c
................\......................\...........\BLE_eventHandler.h
................\......................\...........\BLE_gatt.c
................\......................\...........\BLE_gatt.h
................\......................\...........\BLE_HAL_INT.c
................\......................\...........\BLE_HAL_PVT.c
................\......................\...........\BLE_HAL_PVT.h
................\......................\...........\BLE_hids.c
................\......................\...........\BLE_hids.h
................\......................\...........\BLE_HID_Keyboard.bvf
................\......................\...........\BLE_HID_Keyboard.ctl
................\......................\...........\BLE_HID_Keyboard.cycdx
................\......................\...........\BLE_HID_Keyboard.cyfit
................\......................\...........\BLE_HID_Keyboard.dsf
................\......................\...........\BLE_HID_Keyboard.pci
................\......................\...........\BLE_HID_Keyboard.pco
................\......................\...........\BLE_HID_Keyboard.plc_log
................\......................\...........\BLE_HID_Keyboard.route
................\......................\...........\BLE_HID_Keyboard.rpt
................\......................\...........\BLE_HID_Keyboard.rt_log
................\......................\...........\BLE_HID_Keyboard.sdc
................\......................\...........\BLE_HID_Keyboard.sdf
................\......................\...........\BLE_HID_Keyboard.svd
................\......................\...........\BLE_HID_Keyboard.tr
................\......................\...........\BLE_HID_Keyboard.v
................\......................\...........\BLE_HID_Keyboard.vh2
................\......................\...........\BLE_HID_Keyboard.wde
................\......................\...........\BLE_HID_Keyboard_p.lib
................\......................\...........\BLE_HID_Keyboard_p.pco
................\......................\...........\BLE_HID_Keyboard_p.vh2
................\......................\...........\BLE_HID_Keyboard_r.lib
................\..................

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