blob: 32e2c37e362d312040038beeeb1dae26133eb225 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
.syntax unified
.cpu cortex-m0plus
.thumb
.equ RESETS_BASE, 0x4000c000
.equ RESET_OFST, 0x0
.equ RESET_DONE_OFST, 0x8
.equ ATOMIC_CLEAR, 0x3000
.type setup_gpio, %function
.global setup_gpio
setup_gpio:
ldr r1, =(RESETS_BASE + ATOMIC_CLEAR)
movs r0, 0b1 << 5 // IO_BANK0
str r0, [r1, RESET_OFST]
ldr r1, =RESETS_BASE
1:
ldr r2, [r1, RESET_DONE_OFST]
tst r2, r0
beq 1b
bx lr
|
