mirror of
git://projects.qi-hardware.com/xburst-tools.git
synced 2024-11-01 08:06:16 +02:00
add some initial cpu code in led.S
This commit is contained in:
parent
98fb0b6654
commit
280f8ffb13
@ -2,16 +2,74 @@
|
||||
_start: b start_code
|
||||
|
||||
start_code:
|
||||
ldr sp,=1024*4
|
||||
|
||||
/*
|
||||
* set the cpu to SVC32 mode
|
||||
*/
|
||||
mrs r0,cpsr
|
||||
bic r0,r0,#0x1f
|
||||
orr r0,r0,#0xd3
|
||||
msr cpsr,r0
|
||||
|
||||
/* turn off the watchdog */
|
||||
# define pWTCON 0x53000000
|
||||
# define pWTCON 0x53000000
|
||||
# define INTMSK 0x4A000008 /* Interupt-Controller base addresses */
|
||||
# define INTSUBMSK 0x4A00001C
|
||||
# define INTSUBMSK_val 0xffff
|
||||
# define CAMDIVN 0x4C000018
|
||||
|
||||
ldr r0, =pWTCON
|
||||
mov r1, #0x0
|
||||
str r1, [r0]
|
||||
/*
|
||||
* mask all IRQs by setting all bits in the INTMR - default
|
||||
*/
|
||||
mov r1, #0xffffffff
|
||||
ldr r0, =INTMSK
|
||||
str r1, [r0]
|
||||
|
||||
ldr r1, =INTSUBMSK_val
|
||||
ldr r0, =INTSUBMSK
|
||||
str r1, [r0]
|
||||
|
||||
/* Make sure we get FCLK:HCLK:PCLK = 1:3:6 */
|
||||
ldr r0, =CAMDIVN
|
||||
mov r1, #0
|
||||
str r1, [r0]
|
||||
|
||||
/* Clock asynchronous mode */
|
||||
mrc p15, 0, r1, c1, c0, 0
|
||||
orr r1, r1, #0xc0000000
|
||||
mcr p15, 0, r1, c1, c0, 0
|
||||
|
||||
/* enable uart */
|
||||
ldr r0, =0x4c00000c /* clkcon */
|
||||
ldr r1, =0x7fff0 /* all clocks on */
|
||||
str r1, [r0]
|
||||
|
||||
/* gpio UART0 init */
|
||||
ldr r0, =0x56000070
|
||||
mov r1, #0xaa
|
||||
str r1, [r0]
|
||||
|
||||
/* init uart */
|
||||
ldr r0, =0x50000000
|
||||
mov r1, #0x03
|
||||
str r1, [r0]
|
||||
ldr r1, =0x245
|
||||
str r1, [r0, #0x04]
|
||||
mov r1, #0x01
|
||||
str r1, [r0, #0x08]
|
||||
mov r1, #0x00
|
||||
str r1, [r0, #0x0c]
|
||||
mov r1, #0x1a
|
||||
str r1, [r0, #0x28]
|
||||
|
||||
/* blink led */
|
||||
ldr sp,=1024*4
|
||||
.extern blink_led
|
||||
bl blink_led
|
||||
|
||||
.global delay
|
||||
delay:
|
||||
subs r0,r0,#0x1
|
||||
|
Loading…
Reference in New Issue
Block a user