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Clip+ remove setting GPIOB PIN0, it seems needed only for power

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Also only use 0x50000 bytes of memory since the files just fit in.
TODO: make mkamsboot abort if the decompressed OF or bootloader doesn't
fit in RAM / or overlap on compressed data or uclunpack function

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24727 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Rafaël Carré 2010-02-17 18:27:50 +00:00
parent b4e1cae3d6
commit 40e833af5f
3 changed files with 16 additions and 35 deletions
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24
rbutil/mkamsboot/dualboot/dualboot.S
View file

@ -21,10 +21,11 @@
.text
#if defined(SANSA_CLIPV2) || defined(SANSA_CLIPPLUS)
.set RAM_SIZE, 0x100000 /* Use 1MB of SDRAM on v2 firmwares (bigger firmware) */
#if defined(SANSA_CLIPV2)
.set RAM_SIZE, 0x100000 /* Use 1MB of SDRAM (bigger firmware do not fit in
* 0x50000 bytes) */
#else
.set RAM_SIZE, 0x50000 /* Use full IRAM on v1 firmwares */
.set RAM_SIZE, 0x50000 /* Use full IRAM (or part of SDRAM on as3525v2) */
#endif
/* AS3525 hardware registers */
@ -157,17 +158,6 @@ uclcopy:
cmp r1, #0 /* C3 = #0 means button pressed */
beq boot_of
#elif defined(SANSA_CLIPPLUS)
@ All GPIO_DIR == 0x00 from reset
@ Set B0
ldr r0, =GPIOB
mov r1, #(1<<0) @ pin 0
str r1, [r0, #0x400] @ GPIOB(0) = output
str r1, [r0, #4*(1<<0)] @ write 1 to GPIOB(0) B0 set
mov r1, #500 @ small delay
1: subs r1, r1, #1
bne 1b
@ read pins
ldr r0, =GPIOC
ldr r1, [r0, #4*(1<<3)] @ read pin C3 "|<<"
@ -177,12 +167,6 @@ uclcopy:
orr r2, r2, r1 @ c3 || A1
@ 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
str r1, [r0, #0x400] @ Restore GPIOB_DIR to 0x00
cmp r2, #0 @ test input from pins
bne boot_of @ branch directly to OF if either pin high
#elif defined(SANSA_C200V2)