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Sansa E200v1 Bootloader attempt at enabling USB in boot loader

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there is a 1MB free region that is used to load the firmware but we
shouldn't need that till after a USB connection

so here is my 2nd try

Change-Id: I2552db3a7fba019d7e7188984432f758ddafe548
This commit is contained in:
William Wilgus 2021-10-02 02:19:10 -04:00 • committed by William Wilgus
parent 75524a7eec
commit 7c67a48332
2 changed files with 23 additions and 7 deletions
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23
firmware/core_alloc.c
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@ -8,16 +8,27 @@
/* not static so it can be discovered by core_get_data() */
struct buflib_context core_ctx;
/* defined in linker script */
#if (CONFIG_PLATFORM & PLATFORM_NATIVE) && !defined(__PCTOOL__)
#if defined(IPOD_VIDEO) && !defined(BOOTLOADER)
extern unsigned char *audiobufend_lds[];
unsigned char *audiobufend;
#else /* !IPOD_VIDEO */
extern unsigned char audiobufend[];
#endif
/* defined in linker script */
extern unsigned char audiobuffer[];
extern unsigned char *audiobufend_lds[];
/* pointer to end of audio buffer filled at runtime allocator_init */
unsigned char *audiobufend;
#elif defined(SANSA_E200) && defined(HAVE_BOOTLOADER_USB_MODE)
/* defined in linker script */
extern unsigned char freebuffer[];
extern unsigned char freebufferend[];
/* map linker symbol to the audiobuffer in order to use core_alloc */
unsigned char *audiobuffer = (unsigned char *)freebuffer;
unsigned char *audiobufend = (unsigned char *)freebufferend;
#else /* !IPOD_VIDEO, !SANSA_E200&&BOOTLOADERUSB */
/* defined in linker script */
extern unsigned char audiobuffer[];
extern unsigned char audiobufend[];
#endif
#else /* PLATFORM_HOSTED */
static unsigned char audiobuffer[((MEMORYSIZE)*1024-768)*1024];
unsigned char *audiobufend = audiobuffer + sizeof(audiobuffer);