Jan 28, 2009 - cannot upgrade firmware in d2 cowon when i check the files.i do not see. IAudio must be connected to PC immediately as USB flash device. JetAudio is an integrated multimedia player. It plays various multimedia files in one player. JetAudio will satisfy both convenience and expertise. It can play more than 20 kinds of music data including WAV, MP3, RA, MID and MOD, video data such as AVI, MOV, MPG as well as audio and video CD 2.0.
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IntroductionThe Cowon D2 is a flash-based DAP/PMP with a 320x240 touchscreen, SD card slot, FM radio and TV-Out. It comes in 2/4/8/16GB sizes, and there is also a version with DAB digital radio. There is also an updated model known as the D2+, which features an updated case design and new firmware featuring BBE+ audio processing.Hardware
Port StatusThe D2 port status is: unstable (see TargetClassifications)Most Rockbox functions are usable on the D2/D2+, including music playback and most plugins, but there are a number of shortcomings that prevent it from being a fully supported target:
InstallationThe Rockbox bootloader needs to be patched into an original Cowon firmware, which is then flashed to the D2 using the normal firmware upgrade process. This provides a dual-boot mechanism between Rockbox and the Cowon firmware (to boot Rockbox, set the HOLD switch immediately after power on).You will need a copy of your current Cowon firmware, ie. the D2(N).bin file from the '1' folder in an official firmware update archive (these can be downloaded from Cowon Global). NOTE: The filename depends on the firmware version as shown in the table below:
Automatic InstallationThe current release of Rockbox Installation Utility doesn't support the D2. Preliminary support is in SVN, and you can try binaries from SVN. See this forum announcement for details.The utility should be able to detect and install Rockbox on your player. For more info visit the utility's Wiki page.Manual Installation
Known Problems
Work To Be DoneThings that should be done before the port can be considered truly usable:
Forum ThreadThe New Ports forum thread for the D2 is at:http://forums.rockbox.org/index.php?topic=10164.0Firmware UpgradeFirmware upgrades are in the standard Telechips 'dual-crc' format (more info at TelechipsInfo). Firmware upgrade files (D2.bin or D2N.bin) are a raw, unencrypted dump of SDRAM (base address 0x20000000). This is loaded from flash during normal startup by an 8KB Boot ROM.The device also has a USB boot mode, and can be accessed via the tcctool utility (in Rockbox SVN). USB boot mode is enabled by powering the unit off, then holding any of the keypad buttons ('-', 'M', or '+') while inserting the USB cable.Note that the 'dual-crc' format does not appear to be required when using USB boot mode.Firmware VersionsThere are several variants of the D2 retail firmware tailored for different markets and hardware versions. The variant is identified by the Major version number.
Technical InformationThe TCC7801 has significant similarities to earlier Telechips SoCs such as the 76x (for which a datasheet was posted to the rockbox-dev mailing list here). The following hardware registers appear to be the same as the 76x:
GPIO portsGPIO ports can be accessed as follows:For example, the hold switch state is available by reading bit 3 of 0xF005A020. To enable the LCD backlight, write bit 6 to 0xF005A028.GPIOA (base = 0xF005A020)
GPIOB (base = 0xF005A040)
GPIOC (base = 0xF005A060)
GPIOD (base = 0xF005A080)
GPIOE (base = 0xF005A0A0)
ADCs
LCDThe LCD is powered on and off using the sequences given in the LTV250QV datasheet. The LCD is not visible at all unless the backlight is enabled, so it is necessary to first set the backlight intensity using PCF50606 register 0x35 and then enable it using GPIOA6.Hardware registers for the LCD controller are TBC (base = 0xF0000000), however a working initialisation sequence has been identified from the OF.NAND flashThe following D2's have been observed:
AudioThe SVN build includes basic but working WM8985 and PCM drivers. The DAC is configured as I2S slave to the Telechips SoC, in contrast to the other Rockbox drivers which use the WM codec as master.Hardware equalizer bands EQ1 and EQ5 are used to provide bass and treble controls. At present a full 5-band equalizer is only available using software EQ (this is currently unusable due to keymap problems).The WM8985 is powered by the PCF50606 regulator D3REG. In the original firmware this is configured for 3.3v output by sending 0xF8 to D3REGC1 (0x26).Power managementDifferent D2 hardware revisions contain different PMU chips. It is possible to detect which is present at runtime by configuring GPIOA6 for input and testing its value. If the value is 0, a PCF50606 is present and the port should be configured for output (for use as a backlight power toggle). If the value is 1, a PCF50635 is present and GPIOA6 should be configured for input (use currently unknown).D2 and older D2+ revisionsThese models contain a Philips PCF50606. The original firmware sends a number of initialisation commands to the PCF50606 to control the voltages that go to the various chips in the D2. It would be helpful to work out which regulator outputs each chip is connected to. The following tabe lists the initial values set up by the Cowon firmware.
Newer D2+ revisionsThese models contain a Philips PCF50635, which appears to be at least partly register-compatible with the PCF50633 used by the OpenMoko FreeRunner project. Full documentation for the PCF50633 can be found here, and a driver was added to the linux kernel as of 2.6.29.TouchscreenOn older D2s, the touchscreen is managed by the PCF50606 and can be read using the PMU's 10-bit ADC (see datasheet). A TSCPRES interrupt is raised when a press has been registered.Newer D2+ models contain a PCF50635 PMU, which does not contain a touchscreen controller. Instead a dedicated touchscreen controller is used, which appears to be the Texas Instruments TSC2007 (unconfirmed).X/Y coordinates can be read from I2C registers 0x80/0x90 (slave address 0x90). This returns a single reading with 16-bit resolution (use the most significant 10 bits to get the same resolution as the PCF50606).GPIOC26 is an indication of whether the touch screen is pressed (active low). It is unknown whether an IRQ can be triggered from this GPIO, so a polling mechanism may have to be used.EmulatorTaken off the forum, here is an emulator for the Cowon D2: cowon_emulator.zipCategoryFrontpage: Cowon D2 Port Index [New Ports]
r72 - 12 Apr 2013 - 18:01:59 - WilfriedWinkler Copyright © by the contributing authors. |
Cowon's original D2 MP3 player from 2007 quickly earned a reputation for outstanding sound quality, a long-lasting battery, and cutting-edge touch-screen technology. Two years later, the Cowon D2+ refines the audio quality and touch-screen interface that made the original model so compelling, and includes a reasonable price tag of $139 (8GB) and $179 (16GB).
Design
Physically, the Cowon D2+ is nearly indistinguishable from its predecessor, measuring the same 3 inches wide by 2.2 inches tall and a relatively chunky 0.65 inch thick. The D2+ is manipulated mostly through its touch-screen interface, however, controls for power, menu, button hold, and volume remain on the top edge of the player. Audio, USB, and peripheral connections are located on the left side of the D2+, and an SD/MMC/SDHC card slot is tucked away on the bottom.
Physically, the Cowon D2+ is nearly indistinguishable from its predecessor, measuring the same 3 inches wide by 2.2 inches tall and a relatively chunky 0.65 inch thick. The D2+ is manipulated mostly through its touch-screen interface, however, controls for power, menu, button hold, and volume remain on the top edge of the player. Audio, USB, and peripheral connections are located on the left side of the D2+, and an SD/MMC/SDHC card slot is tucked away on the bottom.
The screen on the D2+ is a 2.5-inch TFT LCD capable of displaying 1.6 million colors at a 320x240-pixel QVGA resolution, and looks comparable with the iPod Classic screen in both size and image quality. The look and feel of the D2's graphic touch-screen interface has been overhauled for a cleaner, more modern look. Functionally, however, the interface is identical to the original D2, which means that scrolling long lists of music takes patience, and some operations are better executed with a stylus than a clumsy finger.
One of the only hardware design tweaks that distinguishes the D2+ from the model we saw in 2007 is the absence of metal trim along the front and back of player. Instead, the D2+ uses an all-plastic design that--though lighter--feels a little less substantial than the original.
Features
The Cowon D2+ is no slouch when it comes to features, offering music, video, and photo playback, along with an FM radio, voice/radio recorder, text reader, Flash player, and a ton of little extras. If you're willing to shell out a little extra on cables, you can also enable features such as line-input recording and video output.
The Cowon D2+ is no slouch when it comes to features, offering music, video, and photo playback, along with an FM radio, voice/radio recorder, text reader, Flash player, and a ton of little extras. If you're willing to shell out a little extra on cables, you can also enable features such as line-input recording and video output.
In spite of the extensive spec sheet, generous screen size, and two years spent back on Cowon's drawing board, the most prized feature of the D2+ is the same feature we loved on the original D2: outstanding audio playback. In fact, one of the only concrete advantages the D2+ offers over its predecessor is the inclusion of the latest BBE+ suite of audio enhancement settings.
The Cowon D2+ (left) offers a larger screen and more features than the Apple iPod Nano, but it's nearly three times as thick and can't pull off tricks like Genius playlists, Cover Flow, and tilt control.
Beyond the sound quality, the D2+ does a nice job handling music playback, in general. The main music playback screen shows off album artwork, track information, elapsed time, and settings such as repeat, shuffle, and EQ. An easily accessible pop-up menu in the bottom left corner of the screen lets you jump into the song browser, bookmark playback, or add songs to a dynamic playlist.
Common music files such as MP3, WMA (including subscription tracks), Audible, and WAV, are all supported on the D2+, as well as boutique formats like FLAC and Ogg. Support for AAC music files isn't offered, though, which was excusable when the original D2 came out in 2007, but is harder to justify now that the popular iTunes AAC format can be played on devices beyond the iPod. The latest MP3 players from Sony, Samsung, and Zune, are all compatible with the iTunes AAC format, and Cowon should really get in the game if they want to compete against the iPod in the U.S.