GPI DEVICE provides a wide set of primitives . Some of them have to be integrated from the payment application.
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Primitives
Miscellaneous
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Primitives
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Module
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Comments
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User Interface
UI primitives are limited to a few set of functions. EMV processing doesn’t require sophisticated displays. However, a minimum set of functions is required to provide a feedback to the cardholder and the merchants. Most of them are not used during transaction flow excepted:
gpiSwitchLED: LED #2 is switch on
gpiDisplayMessageByID: PROCESSING identifier
Depending on the platform, these two primitives should be managed specifically if they alter the performance.
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gpiDisplayMessage
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SPED
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Display any string
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gpiDisplayMessageByID
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SPED
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Display a string from the string table indexed by ID
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gpiBeep
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SPED
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Beep
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gpiSound
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SPED
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Generate a sound from a specific physical address
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gpiSleep
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SPED
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Sleep. This function shall by implemented with care (no thread)
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gpiSwitchLED
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SPED
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Switch ON/OFF a LED
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gpiClearScreen
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SPED
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Clear display
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gpiGetString
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SPED
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Get string from the string table indexed by ID
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Platform
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gpiMemSet
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Platform
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Equivalent to stdlib’s memset
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gpiStrLen
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Platform
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Equivalent to string’s memset
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gpiMemCpy
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Platform
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Equivalent to stdlib’s memcpy
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gpiGetDate
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Platform
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Get system’s date. Careful with time format
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gpiGetTimer
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Platform
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Get system’s time. Careful with time format
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gpiSetDateTime
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Platform
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Set system’s time. Careful with time format
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gpiStartTimer
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Platform
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gpiGetTimerTime
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Platform
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gpiGetTimerState
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Platform
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gpiFreeTimer
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Platform
Initialization
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Primitives
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Module
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Comment
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Initialization
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gpiMain
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Platform
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gpiInitialize
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Platform
Card Processing
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Primitives
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Module
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Comment
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Card Interfaces
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gpiSetTechnoToDetect
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CAD
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gpiTechnoPolling
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CAD
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gpiSetPollingMessage
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CAD
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gpiPower
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CAD
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gpiPolling
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CAD
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gpiCardSwiped
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CAD
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gpiCardInsterted
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CAD
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gpiReadMagstripe
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CAD
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gpiPowerOff
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CAD
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gpiPowerOffAllDevices
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CAD
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gpiResetContactless
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CAD
PIN Management
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Primitives
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Module
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Comment
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gpiPINEnter
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that will be integrated depending on available platform’s services. This is the Hardware Abstraction Level (HAL) for Agnos Framework.
Please refer to dev.h, and functionset.txt to implement the platform integration.