Infineon ERU Interrupt 1 - Implementation Steps and ISR

Implementation
› To generate an interrupt via a falling and rising edges on an input pin a few
configuration steps are required:
– Initialize external request pin (IfxScuEru_initReqPin())
– Select which edge should trigger the interrupt
(IfxScuEru_enableRisingEdgeDetection() and/or
IfxScuEru_enableFallingEdgeDetection())
– Enable generation of trigger events with the function
IfxScuEru_enableTriggerPulse()
– Choose the output channel by selecting the Output Gating Unit (OGUz) and the
trigger pulse output (TRxz)
– An event from the Event Trigger Logic (ETL0) triggers the OGU0 (signal
TRx0). The function IfxScuEru_connectTrigger() determines the output
channel for the trigger event
– Select the condition to generate an interrupt with the function
IfxScuEru_setInterruptGatingPattern()
– Configure and enable the service request with the functions IfxSrc_init() and
IfxSrc_enable()
› The functions above are provided by the iLLD headers IfxScuEru.h and IfxSrc.h.
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2019-10-17 Copyright © Infineon Technologies AG 2019. All rights reserved.