User`s guide

3 Project Generator
• C onnecting the ISRs to the corresponding interrupt service vector table
entries
Note You are responsible for m apping and enabling the interrupts you
specify in the block dialog box.
Connect the output of the Hardware Interrupt block to the control input
of a function-call subsystem. By doing so, you enable the ISRs to call the
generated subsystem code each time the hardw are raises the interrupt.
TheIdleTaskblockspecifies one or more functions to execute as background
tasks in the code generated for the model. The functions are created from the
function-call subsystems to which the Idle Task block is connected.
Mapping and Enabling Interrupts in Generated Code
Although the scheduling blocks generate ISRs to respond to interrupts, they
donotenabletheinterruptsinyourcode. Theblocksalsodonotmapthe
interrupts to the specific ISRs y ou specify in the block dialog bo xes.
To enable and map the interrupt routines, you provide code that performs the
mapping and enabling functions. ISR mapping and enabling code might look
like following samples w hich enable and map interrupts 5 and 7:
IRQ_map(IRQ_EVT_EXTINT5,5); % Map interrupt 5 in the block to ext. int.5.
IRQ_set(IRQ_EVT_EXTINT5); % Enable interrupt 5.
IRQ_map(IRQ_EVT_EXTINT7,7); % Map interrupt 7 in the block to ext. int.7.
IRQ_set(IRQ_EVT_EXTINT7); % Enable interrupt 7.
The following figure shows the block dialog b ox that specifies the interrupts
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