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Wiki > Main > Rockchip27xxPort (compare)

Difference: Rockchip27xxPort (r7 vs. r6)

Port Status

LCD 50% 90% Only one type of lcd implemented. No dma inverse transfers (so updates are sloooow), no partial updates/inverse and other fancy stuff.
Backlight 100% PWM frequency is quite low ~500Hz but my backlight driver circuit can't cope with higher freq reliably.
Buttons 100% Hardware keys for generic/reference design.
I2C?100% One can write and readback registers of the internal codec.
SD 90% Basicaly works. DMA handling is suboptimal. Needs more testing.
NAND 0% 10% Not implemented Low level driver part is reverse engineered. The work on reverse engineer FTL scheme is started.
PCM 80%PCM driver implemented but playback is choppy. choppy on some players.
Codec 80% Driver for internal Dolphin codec implemented but not much tested. No support for anything else than playback through i2s yet.
Recording 0% Not implemented.
ADC 50% Implemented but not tested nor calibrated.
RTC 0% Not present in my device. From various documents it seems that HYM8563 (PCF8563 clone) is widely used. Some members of the rk27xx family have internal RTC.
FM 50%RDA5807P? can work in TEA5767 compatibility mode. Rockbox has mature driver for that.
USB 5% The USB core has some weird scheme of supporting control packets. Some requests seems to be handled purely in hardware which doesn't quite fit rockbox usbstack concept.

Running custom code

One may compile rockbox bootloader (which currently is playground for testing code) and execute this on the device with help of rk27load utility (located in utils/rk27tools/rk27load)

As of r30459 it is possible to compile and run main rockbox binary, codecs and a few test plugins.

-- MarcinBukat - 07 Jun 2011

r9 - 11 Apr 2013 - 09:55:17 - MarcinBukat

Revision r7 - 27 Sep 2012 - 07:50 - MarcinBukat
Revision r6 - 06 Sep 2011 - 12:54 - MarcinBukat
Copyright by the contributing authors.