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rockbox/firmware
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Aidan MacDonald e5e82820f6 echoplayer: re-enable 50 MHZ SDMMC bus 
The problem with drive strength and things not working reliably
at 50 MHz turned out to be entirely caused by the ESD diodes on
the data/command/clock lines, which have a whopping 200-300 pF
junction capacitance -- 6-10x higher than the 30 pF limit given
by the MMC spec.

After desoldering the diodes the bus seems stable at 50 MHz and
with any drive strength (note MEDIUM is still fast enough even
for 50 MHz, so the drive strength is unchanged).

Change-Id: If9847ee4145f5ed2f7e172cfa89acad0737a897f
2026-02-18 18:14:11 -05:00
..
asm Remove Creative Zen Vision and Vision:M ports 2026-02-06 07:31:54 -05:00
common firmware: fat: fix sector_t passed to 64-bit format strings 2025-12-24 09:30:47 -05:00
drivers Remove Creative Zen Vision and Vision:M ports 2026-02-06 07:31:54 -05:00
export sansafuzeplus: Support up to 96KHz playback. 2026-02-17 14:37:38 -05:00
include elf_loader: add elf_loadmem() to load file from memory 2026-01-25 19:51:07 -05:00
kernel Convert users of SHAREDDATA_ATTR to SHAREDBSS_ATTR 2026-02-05 07:57:07 -05:00
libc lua -- remove strtol and strtoul replace with rb->strtol and rb->strtoul 2025-12-06 18:11:13 -05:00
reggen echoplayer: allow enabling system debug in normal builds 2026-02-06 07:09:32 -05:00
target echoplayer: re-enable 50 MHZ SDMMC bus 2026-02-18 18:14:11 -05:00
usbstack usb: fix yellow in eb69211791 2026-01-27 15:23:47 -05:00
arabjoin.c
arabjoin.h unicode: Support characters beyond the first unicode plane 2025-09-12 09:24:30 -04:00
ata_idle_notify.c misc: Clean up a large pile of -Wexpansion-to-defined warnings 2025-04-21 21:04:05 -04:00
backlight-sw-fading.c backlight-sw-fading: FS#13717 fix brightness overshoot 2025-12-19 08:20:07 +01:00
backlight.c Convert users of SHAREDDATA_ATTR to SHAREDBSS_ATTR 2026-02-05 07:57:07 -05:00
bidi.c unicode: Support characters beyond the first unicode plane 2025-09-12 09:24:30 -04:00
buflib_malloc.c
buflib_mempool.c
chunk_alloc.c
COPYING
core_alloc.c hosted: Shrink audiobuffer to (MEMORY_SIZE-1) megabytes 2025-09-12 23:15:11 -04:00
debug.c
eeprom_settings.c
elf_loader.c elf_loader: add elf_loadmem() to load file from memory 2026-01-25 19:51:07 -05:00
enc_base.c
events.c
firmware.make make: remove asm.make and use asm/SOURCES directly 2026-01-08 16:41:57 +00:00
font.c font: logf: fix pointer in buflibmove_callback 2026-01-10 07:11:51 +01:00
font_cache.c unicode: Support characters beyond the first unicode plane 2025-09-12 09:24:30 -04:00
general.c
hangul.c unicode: Support characters beyond the first unicode plane 2025-09-12 09:24:30 -04:00
lc-rock.c firmware: introduce CONFIG_BINFMT 2026-01-05 13:14:30 -05:00
linuxboot.c
logf.c
lru.c
panic.c
pcm.c
pcm_mixer.c
pcm_sampr.c
pcm_sw_volume.c
powermgmt.c misc: Ensure stacks are always aligned with the native pointer size. 2025-09-05 19:43:11 -04:00
profile.c
README
rolo.c nwze370: improve lcd & backlight 2025-10-21 16:54:57 -04:00
rom.lds
screendump.c
scroll_engine.c pass event data to usb_acknowledge 2026-01-26 19:47:09 -05:00
sdmmc.c SD: Move sd_parse_csd() into common sdmmc code 2025-08-22 14:48:28 -04:00
sound.c sound: fix volume change being reported to %mv tag on boot 2025-10-03 10:01:02 +01:00
SOURCES mrobe500: Allow bootloader build without HAVE_BOOTLOADER_USB_MODE 2026-02-07 10:48:22 -05:00
storage.c bootloaders: Don't build usb_core without HAVE_BOOTLOADER_USB_MODE 2026-02-07 08:46:10 -05:00
system.c
timer.c
tuner.c
usb.c bootloaders: Don't build usb_core without HAVE_BOOTLOADER_USB_MODE 2026-02-07 08:46:10 -05:00

README 

See docs/README