2010年5月8日星期六

Tracking kernel 2.6.32 for OMAP3

Recently I am thinking about update kernel to 2.6.32 for 0xdroid.
Currently the kernel for 0xdroid is based on 2.6.29 tracking AOSP's kernel tree. But we see there seems some new improvement introduced for OMAP3 platform, like including Graphics, a restructured patch set of DSS2 by Tomi, and updated EHCI hcd (USB 2.0) and USB OTG.

Actually the effect of changing kernel form 2.6.29 to 2.6.32 for 0xdroid project is not huge, but we expect updated USB EHCI can get the real stability and 0xlab's kernel can be suitable for more devices. Besides this, 0xdroid's kernel should start to follow up 2.6.32 branch of AOSP's omap kernel tree as well. It looks the force of development has been migrated to 2.6.32 branch already.

2010年3月28日星期日

複習sed

有些工具不是很常用,但需要時拿出用一下是蠻好用的。
前陣子為了修改Android的manifest file,要把各個project 的revision拿掉,以使之直接追上HEAD。
於是複習了一下用sed這個工具來處理

$ sed 's#\([^][^]*\)\ revision=\"[a-z0-9]\{40\}\"\([/]*>\)#\1\2#' <> default_head.xml

如此則使之revision="GIT_SHA1_HASH" 屬性被移除掉。

2010年2月16日星期二

南部的好天氣

今年回鄉下回到屏東萬丹,許久沒感受到鄉下環境,純樸自然的生活型態,夜晚的晚風含著田園味,獨棟式的建築風格以及南部的好天氣,在在都吸引著我。 其他不談,許多親人朋友大都在北部我想是最主要對於遷移南部這個想法來說的一個適應上的問題。

萬丹的紅豆餅,潮州的泡麵早餐以及燒冷冰和旗魚黑輪,在一天內吃到真是太讚啦!!!
於不預期傳說中的城堡聚會參一腳的我感受到了Mini cooper在南部的精神了! Mini Cooper,硬式小跑車,精緻得洽到好處的藝術品。 好吧,我算是沒看過城市獵人

2010年1月2日星期六

2010 の第一走


2009說掰掰了,2010的到來,實在讓我對2009過得之快感到些許惶恐。也期許之後的跨年能夠好好計劃一下。(跨年的點,可到國外或是中南部)

其實今年的天氣實在不怎麼樣,但難得的假期,還是要出去動一動,往大溪方向的旅程一直被擱著,不知道擱多久了,今天終於出發,由老鷹領頭,前往關西橘子園,為今年的第一次出門。

上台三線後,一路只能說可以用「好走」來形容,嗯,或可說是「行雲流水」。沿途的風景再再的吸引我的目光,可惜騎得有點快。走了15公里經台三線來到大溪老街,進入了鄉村區域,看到的房子皆是透天矮房,不覺得能看到三樓以上的房子,這就是鄉村,不管是房子還是人,都可感受到鄉村味。

沿路有許多支線,也有許多風景點,往復興鄉,石門水庫,慈湖,桃源仙谷等,以及許多我還未知的,不勝枚舉,只能另找時間再來晃晃了。

到了老鷹的橘子園,為第二次的到來,這次也多認識了橘子的種類,有椪柑,年柑,茂谷柑,對我來說實在很不好記。來到這邊走走,看著寬闊的野地,深呼吸,著實會讓人產生一些暇想,因為這裡的好空氣,實在是不錯。這裡耕農者可能就是一生在同一塊土地上耕種吧。看到隔壁有別人的菜,雖然四下無人,心裡想偷但不能偷,我沒有在玩開心農場。

照幾張照片來紀念一下。

讚!

2009年12月19日星期六

Recently

Sometime I feel like I need to slow down my pace and my mind and now the time it is. Either for quiet thinking, intending to watch more or thinking about changing something. As you can see, I am a lazy blogger and not a good writer. Passion is the momentum for anything you want to do and it's the best gift.

Here are something about my work recently. Write it down here for arrangement.
It's about 0xdroid project. I have done implementing Camera HAL for usb camera. For this, I need to have some concept about V4L2 in kernel. It's related to V4L2 Video In. Though camera is more complicated cause it can be greatly performance related when it comes to embedded device. For most product design, the camera sensor module is connected with the camera interface of the SOC. Thus in this manner, most cases there will be closed library provided by the SOC vendor for doing some effect control and performance related tasks.

When doing video recording with the camera, colorspace conversion for encoding and for preview on the screen to make the acceptable frame rate is really critical, especially when the resolution is high. Better situation will be more task can be handled by hardware. For taking picture, it would be better if the hardware can do scaling and jpeg encoding, etc. For previewing and video recording, it also would be cool if we don't need to do heavy colorspace conversion in host software side by hardware conversion(YUYV to YUV420(sp) or RGB) and Overlay support.

Overlay is cooperated with V4L2 video out part. Overlay verifying and could be used by Camera HAL or multimedia video playback is important.

More ahead. Though I need to let myself know what's the value and getting prepared.

Off topic here in this post, most importantly, Glad and excited that we have a third release, beagle-donut-0x3.