commit 11470e33b0b0ac3b99f744929baaf120ba1e2641
parent c5f46fadc685f4d0e266b174678c44067aa90dd3
Author: Matsuda Kenji <info@mtkn.jp>
Date: Thu, 16 Mar 2023 10:51:35 +0900
use faster clock
'TOOHIGH' didn't work
Diffstat:
| M | main.s | | | 36 | ++++++++++++++++++++++++++++++------ |
1 file changed, 30 insertions(+), 6 deletions(-)
diff --git a/main.s b/main.s
@@ -1,12 +1,33 @@
.section .text
.global main
main:
- // enable clk_peri
- ldr r0, clocks_base
- add r0, r0, #0x48
- mov r1, #0x1
- lsl r1, r1, #11
- str r1, [r0, #0]
+ // enable rosc
+ ldr r0, rosc_base
+ mov r1, #0xfa
+ lsl r1, r1, #4
+ add r1, r1, #0x7
+ str r1, [r0, #0] // ROSC_CTRL
+
+ // set rosc freqa and rosc freqb
+ mov r1, #0x96
+ lsl r1, r1, #8
+ add r1, r1, #0x96
+ lsl r1, r1, #4
+ add r1, r1, #0x7
+ lsl r1, r1, #4
+ add r1, r1, #0x7
+ lsl r1, r1, #4
+ add r1, r1, #0x7
+ lsl r1, r1, #4
+ add r1, r1, #0x7
+ str r1, [r0, #0x4] // ROSC_FREQA
+ str r1, [r0, #0x8] // ROSC_FREQB
+
+ // set rosc devider
+ mov r1, #0xaa
+ lsl r1, r1, #4
+ add r1, r1, #0x1
+ str r1, [r0, #0x10] // ROSC_DIV
// reset gpio
ldr r0, reset_base
@@ -79,6 +100,9 @@ io_bank0_base:
uart0_base:
.word 0x40034000
+rosc_base:
+ .word 0x40060000
+
gpio_out:
.word 0xd0000010
