LPC2103 >> Assembly
EINT1(FIQ)
參考資料：
1. pdf
暫存器
main.s
.equ IODIR, 0xe0028008 .equ IOCLR, 0xe002800c .equ IOSET, 0xe0028004 .equ PINSEL0, 0xe002c000 .equ EXTINT, 0xe01fc140 .equ VICIntEnable, 0xfffff010 .equ VICIntSelect, 0xfffff00c .text .align 2 .global _start _start: b reset _undef: b . _swi: b . _pabort: b . _dabort: b . _reserved: b . _irq: b . _fiq: b fiq_handler reset: mrs r0, cpsr bic r0, #0x40 msr cpsr_c, r0 ldr r0, =PINSEL0 ldr r1, =(1 << 28) str r1, [r0] ldr r0, =VICIntEnable ldr r1, =(1 << 15) str r1, [r0] ldr r0, =VICIntSelect ldr r1, =(1 << 15) str r1, [r0] ldr r0, =IODIR ldr r1, =(1 << 22) str r1, [r0] ldr r0, =IOCLR ldr r1, =(1 << 22) str r1, [r0] b . fiq_handler: ldr r0, =IOSET ldr r1, =(1 << 22) str r1, [r0] ldr r0, =EXTINT ldr r1, =0x02 str r1, [r0] subs pc, lr, #4 .end
完成
