Steward
分享是一種喜悅、更是一種幸福
微處理器 - Allwinner V3S (Lichee Pi Zero) - Assembly - Button
司徒將按鍵連接到PG4
GPIO位址
PG_CFG0
PG_DATA
PG_PUL0
main.s
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | . global _start . equ GPIO_BASE , 0x01c20800 . equ PG_CFG0 , ( GPIO_BASE + (0x24 * 6) + 0x00) . equ PG_DATA , ( GPIO_BASE + (0x24 * 6) + 0x10) . equ PG_PUL0 , ( GPIO_BASE + (0x24 * 6) + 0x1c) . arm .text _start : . long 0xea000016 . byte 'e', 'G', 'O', 'N', '.', 'B', ' T ', '0' . long 0, __spl_size . byte 'S', 'P', 'L', 2 . long 0, 0 . long 0, 0, 0, 0, 0, 0, 0, 0 . long 0, 0, 0, 0, 0, 0, 0, 0 _vector : b reset b . b . b . b . b . b . b . reset : ldr r0 , = PG_CFG0 ldr r1 , =0x00000001 str r1 , [ r0 ] ldr r0 , = PG_PUL0 ldr r1 , =0x00000100 str r1 , [ r0 ] ldr r0 , = PG_DATA 0: ldr r1 , [ r0 ] lsr r1 , #4 str r1 , [ r0 ] b 0b . end |
完成