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Sansa Clip+: Unset B0 correctly in dualboot.S

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24582 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jack Halpin 2010-02-10 14:35:52 +00:00
parent c447eb90cb
commit aa8da2333e
2 changed files with 6 additions and 7 deletions
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9
rbutil/mkamsboot/dualboot/dualboot.S
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@ -157,7 +157,8 @@ uclcopy:
cmp r1, #0 /* C3 = #0 means button pressed */
beq boot_of
#elif defined(SANSA_CLIPPLUS)
@ Assumes GPIOB_DIR is 0x00 on reset
@ All GPIO_DIR == 0x00 from reset
@ Set B0
ldr r0, =GPIOB
mov r1, #(1<<0) @ pin 0
str r1, [r0, #0x400] @ GPIOB(0) = output
@ -176,12 +177,10 @@ uclcopy:
orr r2, r2, r1 @ c3 || A1
@ Unset GPIOB(0)
@ Unset GPIOB(0) & Restore GPIOB_DIR
ldr r0, =GPIOB
mov r1, #0
str r1, [r0, #4*(1<<0)] @ write 0 to GPIOB(0) B0 unset
@ restore GPIOB_DIR to 0x00
ldr r0, =GPIOB
str r1, [r0, #0x400] @ Restore GPIOB_DIR to 0x00
cmp r2, #0 @ test input from pins