PrimeCell® Vectored Interrupt Controller (PL190) Technical Reference Manual B.1.8. Simple interrupt initialization

B.1.8. Simple interrupt initialization

Example B.8 shows how you can use the interrupt controller without using vectored interrupts, or the interrupt priority hardware. For example, you can use it for debugging.

Example B.8. Simple interrupt initialization

       LDR    r0, =IntCntlBase

       MOV    r1, #<interrupt_to_enable>

       LDR    r2, [r0, #IntSelectOffset]                 ;  Select IRQ interrupt

       BIC    r2, r2, r1

       STR    r2, [r0, #IntSelectOffset]

       STR    r1, [r0, #IntEnableOffset]                 ;  Enable interrupt

       MRS    CPSR_c, #(DISABLE_IRQ + MODE_SYS_32)       ;  Enable FIQ interrupts

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