Download BL620 smartBASIC extensions v12.4.10.0

smart BASIC – BL620
Extension Functionality User Manual
FUNCTION HndlrBtn0Pr() AS INTEGER
//just exit and stop waiting for events
ENDFUNC 0
ONEVENT
ONEVENT
EVBLEMSG
CALL HandlerBleMsg
EVGPIOCHAN1 CALL HndlrBtn0Pr
rc=GpioBindEvent(1,16,1)
//Channel 1, bind to low transition on GPIO pin 16
PRINT "\nSupply voltage is "; ReadPwrSupplyMv();"mV\n"
mv=2700
rc=SetPwrSupplyThreshMv(mv)
PRINT "\nWaiting for power supply to fall below ";mv;"mV"
//wait for events and messages
WAITEVENT
PRINT "\nExiting..."
Expected Output:
Supply voltage is 3343mV
Waiting for power supply to fall below 2700mV
Exiting...
SETPWRSUPPLYTHRESHMV is an extension function.
7. EVENTS AND MESSAGES
smart BASIC is designed to be event driven, which makes it suitable for embedded platforms where it is
normal to wait for something to happen and then respond.
To ensure that access to variables and resources ends up in race conditions, the event handling is done
synchronously, meaning the smart BASIC runtime engine has to process a WAITEVENT statement for any
events or messages to be processed. This guarantees that smart BASIC will never need the complexity of
locking variables and objects.
There are many subsystems which generate events and messages as follows:
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Timer events, which generate timer expiry events and are described here.
Messages thrown from within the user’s BASIC application as described here.
Events related to the UART interface as described here.
GPIO input level change events as described here.
BLE events and messages as described here.
Generic Characteristics events and messages as described here.
Embedded Wireless Solutions Support Center:
http://ews-support.lairdtech.com
www.lairdtech.com/wireless
200
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