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mkamsboot: make clip zip boot OF when pressing left button

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pressing vol- to boot OF is still possible

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31112 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Rafaël Carré 2011-12-02 18:31:40 +00:00
parent ab76a0db28
commit 444b17626f
3 changed files with 34 additions and 9 deletions
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21
rbutil/mkamsboot/dualboot/dualboot.S
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@ -182,6 +182,27 @@ uclcopy:
cmp r1, #0 @ test input from pins
bne boot_of @ branch directly to OF if either pin high
ldr r0, =GPIOC
ldr r1, [r0, #0x400]
orr r1, r1, #((1<<1)|(1<<2)) @ output
bic r1, r1, #(1<<5) @ input
str r1, [r0, #0x400]
mov r1, #0
str r1, [r0, #4*(1<<1)] @ zero C1
mov r1, #(1<<2)
str r1, [r0, #4*(1<<2)] @ set C2
mov r1, #50 /* small delay */
1: subs r1, r1, #1
bne 1b
ldr r1, [r0, #4*(1<<5)] @ read C5 = left
cmp r1, #0
bne boot_of
#elif defined(SANSA_C200V2)
.set BUTTON_LEFT, (1<< 2)
.set BUTTON_DOWN, (1<< 3)