T******T
发帖数: 3066 | 1 UART : pro: established, simple, async
con: Dog slow
SPI: pro: established, easy protocol, could be high speed than UART or I2C
con: too many pin count
I2C: pro : 2 wires only, multi-slave/master,
con: loose standard, slow, HS speed requires active pullup driver,
more susceptible to glitches and false start/stop conditions
USB: pro: fast, low pin count,
con: more complicated PHY, controller design, more constraints on
la |
|
l***g
发帖数: 1035 | 2 add CAN in ur list.
spi and i2c are more for the inter-chip comm like adc, mem, etc. i
personally don't like i2c, driver is always a problem. spi read and write is
still complex. these two are bit based so you need to understand each clock
.
uart is byte based so it's much easier, variaties of rs232 485 can do long
distance. but no frame so comm protocol has to implement crc header etc on
the application level.
ethernet and can are frame based. much easier to implement. but can is
expensive on t |
|
发帖数: 1 | 3 谁叫自己上了嵌入式的贼船，工资低呢。。。C看多了，也不能刷题转码搞互联网
为什么摄像头领域不能有像开源openwrt一样的项目呢？
把海康的dmesg贴出来，大家可以参考，他们用安霸S3L，https://www.ambarella.com/
products/security-ip-cameras/security-ip-camera-products#S3L
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 3.10.73+ ([email protected]) (gcc version 5
.2.1 20151005 (Linaro GCC 5.2-2015.11-2) ) #1 PREEMPT Mon Jan 23 10:38:22
CST 2017
[ 0.000000] CPU: ARMv7 Processor [414fc091] revision 1 (ARMv7), cr=
10c53c7d
[ 0.000000] CPU: PIPT / ... 阅读全帖 |
|
b***i
发帖数: 3043 | 4 什么声纳，我们做的是30年前IT产业作的事情，那个时候UART还是独立的，那个16550
是8位的，现在java居然不支持UART。痛心。
我们的速度是1200， 9600，比特每秒，这有什么秘密。不过我不想用软件，或者中断
来实现这个罢了，我想用FPGA或者TPU来实现9bit uart。
FPGA怎么个crash?是软arm core? 有linux吗？
我的设想是即使SRAM有问题，但是我不是有firmware吗，可以再写一次，就是在嵌入式
系统中可以重写FPGA。
总之听听大家的意见，刚才发现OMAP L138好像没有9bit uart。基本arm都没有，pic是
有的。 |
|
d***a
发帖数: 13752 | 5 瞎猜了，有人拿time processing unit处理声纳数据。拿来实现9-bit UART，有点大材
小用了...也不少见。在微控器中一般都有9-bit UART，OMAP处理器已经不是微控器。
你痛心Java不支持UART...呵呵，没那个硬件，软件是变不出花样的。
SRAM-based的FPGA，FPGA的look-up table是存在SRAM bits里的。但SRAM bits有一定的
概率出现soft error，FGPA的逻辑功能就变了。用的是soft core。
16550 |
|
d***a
发帖数: 13752 | 6 9600 UART是一个50美分的MCU就能做的事情，而且可靠。看你说的，似乎9-bit UART就
是最重要的功能？你说的让人迷惑的地方，是不知道你们的项目要新增的功能是什么，
这才是决定用那个芯片的关键。
Freescale的ARM芯片，有带9-bit UART的。 |
|
l***g
发帖数: 1035 | 7 很少有embedded chip 会有多于4个uart. X86那个也是uart不是rs232, ，which
requires tranceiver.
I would say uart if there is spare channel since they share the same power
thus same signal level.
Most likely the data is not that much and the two devices are close.
Other options are overkill though they would work.
indicators)
additional
system
close |
|
发帖数: 1 | 8 LZ今年五月份毕业，想找一份embedded/firmware工作，现在人在湾区，倾向于湾区和
San Diego的职位，干过两端实习，比较擅长Automotive (CAN, CANOpen, J1939)和 蓝
牙4.0，会uc/COS III RTOS和一点linux kernel/device driver。实在想求一下帮助
，简历贴上来， 请教些如何修改简历，或者内推， 多谢版内各位了！！
Programming Languages and Framework
•Labview, C, C++, C#, Java, Python, Shell scripting, Matlab, ARM
assembly
Knowledge and Skills
•Protocol: SPI, UART, I2C,TCP/IP, CAN, CANOpen, J1939 .
•Processor/Platform: Microchip PIC, ARM(Cortex-M), AVR, Arduino,
Rasberry Pi.
•OS: Lin... 阅读全帖 |
|
A*******s
发帖数: 23 | 9 send resume to a****************[email protected]
Hardware Systems Integration Engineer
Sr. HW Systems Integration Engineer
Hardware Systems Integration Engineer
Hardware Systems Integration Engineer
Hardware Systems Integration Engineer
Hardware Design Engineer
Hardware System Integrator
Hardware Systems Integration Engineer
Hardware System Integrator
Hardware Systems Integration Engineer
Job Number: 26059622Santa Clara Valley, California, United
StatesPosted: Jun. 26, 2013Weekly Hours: 4... 阅读全帖 |
|
p**********g
发帖数: 9558 | 10 uart两种模式的速度的简称
UART (universal asynchronous receiver/transmitter) converts parallel data ..
.. (up to 100K bits/s), fast mode (up to 400K bits/s) |
|
A*******s
发帖数: 23 | 11 send resume to a****************[email protected]
[Apple openings] Hardware Systems Integration Engineer/Hardware Design
Engineer
Hardware Systems Integration Engineer
Sr. HW Systems Integration Engineer
Hardware Systems Integration Engineer
Hardware Systems Integration Engineer
Hardware Systems Integration Engineer
Hardware Design Engineer
Hardware System Integrator
Hardware Systems Integration Engineer
Hardware System Integrator
Hardware Systems Integration Engineer
Job Number: 26059622S... 阅读全帖 |
|
S*A
发帖数: 7142 | 12 哈，果然被我说中了，你丫真的是不知道 HID profile 是什么然后就在那里
嚷嚷 HID profile。
口口声声绝大多数蓝牙鼠标不支持 HID profile。
我刚才问你指的 HID profile 是在 Host 驱动还是鼠标设备，
你现在开始说这个蓝牙是用 device side 和 host side 的联合工作啦？
这段总算明白我问的有道理啦？
你可笑的地方还不止这个：
“UART的pin out,即使USB pin out，CPU也认为这 是bluetooth device而不
是HID device”...“bluetooth device map到CPU”， 这个一看就是不懂
蓝牙 Stack 装懂啦。你以为这个 bluetooth pin 还真跟 UART 一样接个
pin 连到 CPU 去的啊？一个蓝牙鼠标，就不可以是 bluetooth device
同时也是 HID device？ 这两个就不是一个层。蓝牙鼠标提供个 HID profile
就不是蓝牙设备了？笑话。
回到你最愚昧的论断，大多数蓝牙鼠标不支持 HID profile。是这么说的吧。
我就... 阅读全帖 |
|
S*A
发帖数: 7142 | 13
不是很理解，你是要自己设计个板子还是用现成比较接近的就可以了？
你说得这个 pogoplug V4 就有，amazon 上面 $7。
100/
Kernel 启动到 User space 我猜customize kernel 2 秒钟应该可以。
从 USB storage 上读就慢了。还有启动网络也慢，要 link negotiate.
DHCP 等等。但是你这种设备如果就是 Kernel 启动了，网络不能用
大概也不行。
http( 不
我觉得，你现在完全没有概念时间到底慢在什么地方。
花点时间看看 dmesg 知道各个模块各自花多少时间。
probe 一般不是多线程的，进入 user space modprobe 可以多线程。
systemd 就是干这个。 UART 通信非常简单，不需要 probe。 那个几乎
没有时间花在 probe 上面。数据发出去要点时间。
如果我是你可能就先拿那个 pogoplug V4 mobile 试试，有 128M RAM，
128M flash。带 UART， Gigabit ethernet, USB controller, SD card.
... 阅读全帖 |
|
S*A
发帖数: 7142 | 14
不是很理解，你是要自己设计个板子还是用现成比较接近的就可以了？
你说得这个 pogoplug V4 就有，amazon 上面 $7。
100/
Kernel 启动到 User space 我猜customize kernel 2 秒钟应该可以。
从 USB storage 上读就慢了。还有启动网络也慢，要 link negotiate.
DHCP 等等。但是你这种设备如果就是 Kernel 启动了，网络不能用
大概也不行。
http( 不
我觉得，你现在完全没有概念时间到底慢在什么地方。
花点时间看看 dmesg 知道各个模块各自花多少时间。
probe 一般不是多线程的，进入 user space modprobe 可以多线程。
systemd 就是干这个。 UART 通信非常简单，不需要 probe。 那个几乎
没有时间花在 probe 上面。数据发出去要点时间。
如果我是你可能就先拿那个 pogoplug V4 mobile 试试，有 128M RAM，
128M flash。带 UART， Gigabit ethernet, USB controller, SD card.
... 阅读全帖 |
|
M**********e
发帖数: 44 | 15 Hi,
I am wondering why USB 2.0 can achieve 480bps rate.
I had a look on USB 2.0 spec, there isn't any modulation scheme. There is
only scrambling (every contineous "1", insert a "0" ) and NRZI coding. Does
it mean the 480Mbps signal is transmitted directly (i.e. 1 bit occupies 2.08
ns, and this signal can be sampled by local 480MHz clock directly )?
I know there are several other methods to improve speed in USB. Such as
transmitting signal by differential, and the cable is shielded, short
distan... 阅读全帖 |
|
b***i
发帖数: 3043 | 16 主要任务 1200比特每秒的uart, 9bit，
同时，9600比特, 8bit uart
经常tCP, IP，文件存储，估计10年能存个16G，
有可能有特殊的信号，以后如果可能，上web server.
主要吧，烙印居然说linux不好，会有问题。以前我们开发uClinux是很麻烦，因为
coldfire的uClinux不行，很多kernel代码需要自己写，比如qspi什么的， SD好不容易
折腾出来了，还是很慢。
我想用linux，不是因为所有东西都有了，都不用自己写了吗。然后我写application就
可以了。 |
|
S******8
发帖数: 24594 | 17 龙芯3B 8核处理器静悄悄地出笼
据龙芯提供的资料显示。龙芯3号是面向高吞吐率计算和高性能计算，降低成本和功耗
的需要而设计的多核芯片。龙芯3A4核处理器是功耗最低的多核服务器芯片。与intel芯
片的高性能相比，龙芯3号更重视性能功耗比这个指标的先进性。而能够充分体现出这
个特色的是最新的龙芯3 B芯片。在其提供的性能对比表里。龙芯3B的双精度峰值达到
128GFLOPS为龙芯3A计算能力的8倍，超过了Intel Core i7 980 XE。尽管还落后AMD
Opteron X12但是龙3B的功耗只有40瓦。
主频 1GHz
微体系结构 集成8个64位超标量处理器核，每个处理器核具有如下特点：
支持MIPS64指令集及龙芯扩展指令集；
9级超流水线结构；
四发射乱序执行结构；
2个定点单元、2个浮点单元和1个访存单元；
每个浮点单元支持256位向量运算；
采用交叉开关进行核间互连；
通过HT接口进行片间可伸缩互连
高速缓存 每个处理器核的一级指令cache和数据cache各64KB
八个处理器核通过交叉开关共享4MB的二级cache
内... 阅读全帖 |
|
f***y
发帖数: 4447 | 18 摆脱arm
https://laoyaoba.com/html/news/newsdetail?source=pc&news_id=726307
（集微网报道 艾檬）MCU市场的竞争将开启RISC-V核的新航道？
在国内32位基于ARM Cortex-M通用MCU市场占据探花之位之后，兆易创新GigaDevice持
续精进，在行业内率先将开源指令集架构RISC-V引入通用MCU，正式推出全球首个基于
RISC-V内核的GD32V系列32位通用MCU，并提供程序代码库、集成开发环境、嵌入式操作
系统、云生态、开发板等完整工具链支持。有备而来的兆易创新将在RISC-V MCU市场掀
起多大的浪花？
打造GD32百货商店
作为GD32系列的新成员，先来看看光环加身的GD32系列家族的发展。
兆易创新执行副总裁、MCU事业部总经理邓禹表示，GD32系列主要是基于ARM Cortex-M
系列的32位通用MCU产品，拥有320余款产品型号、22个产品系列以及11种不同封装类型
，实现高性能、低成本和易用性，涵盖入门级、主流级、高性能增强型等应用，累计出
货量超过3亿颗，客户数量超过1万家，覆盖率... 阅读全帖 |
|
d*b
发帖数: 21830 | 19 2000年的车就普遍CAN bus了，很多车的steering都开始全电控而不是以前的液压助力
。估计以后连oxygen sensor都要UART接口。这点德国车比起日本还有美国车，还是走
的比较晚的。
美国车很久前就试图把机械传感器电子化，比如ford的E－EGR，虽然不算很成功。 |
|
L********r
发帖数: 59 | 20 Job Description:
Candidate must have:
- knowledge about real time OS.
- knowledge about C/C++, and object oriented design concepts
- knowledge about Multi-Threading.
- Knowledge of software development cycle
- Previous embedded development experience
- Good communication and documentation skill
- Good at multitasking Recommended:
- Previous experience with one or more CPU architecture – ARM, PPC, 8051
- Exposure to assembly level programming
- Previous device driver development experience, idea... 阅读全帖 |
|
b**t
发帖数: 102 | 21 (有意请先PM, thanks!)
Principal Logic Design Engineer - SATA Expert
The Processor Division of Broadcom Corporation is well known in the
semiconductor industry for providing super high-performance multi-core
network microprocessors. We are staffing up in critical R&D areas in the
high-rise facility at Highway 101 & Great America Parkway
As a senior Logic Design Engineer you will be responsible for performing
micro-architecture and logic design in the development of I/O devices in
high performance mu... 阅读全帖 |
|
q**n
发帖数: 87 | 22 Job Title: Embedded network protocol SW Engineer
Job Requirement
>5 years of experience in embedded SW design, development and debug/
integration for real-time networking or communication systems. Thorough
knowledge of networking protocols especially in Layer 2/Layer 3: Media
Access Control layer and Logical Link Control layer. Be able to translate
communication standard protocols i.e. 802.15.4, 802.15.4e, Power Line
Communication protocols (PRIME, G3) into efficient implementations in MCU.
Fami... 阅读全帖 |
|
n****e
发帖数: 109 | 23 招聘信息：三藩市智能硬件startup ，现有 program manager 一个opening，要求有3
年以上硬件开发管理经验，有管理中国代工厂和供应链经验的优先，有意者请联系我
另外，有熟悉 UART， I2C, DALI 通许协议的firmware engineer 同学，也请联系我。 |
|
发帖数: 1 | 24 Job description 请见下。 请发简历至[email protected] 注明内推申请。 我
会电话联系以及介绍公司、薪资情况。公司不是start up， 是一所跨国中型企业。 经
验年限不限，主要是要看是否符合下面的要求。 可以办身份。
Sr. Electrical Engineer (Power Amplifier)
DESCRIPTION
Amplifier driver and power supply development for motion control system
High precision power amplifier driver (PWM or linear) design and development
for motion control system;
AC to DC power supply design and development for motion control system
Analog circuit schematic design
PCB layout
REQUIREMENTS
BS/MS/PhD i... 阅读全帖 |
|
m*****l
发帖数: 1736 | 25 My company has some openings: software design engineer, software design team
leader, hardware design engineer, program manager, etc. The product is
related with home appliances, like refrigerator, cooking oven, dish washer,
etc. It requires working experiences on embedded software design --User
Interface, Fault/Error detection, Database using EEPROM; Interface Level –
UART, I2C, SPI/SCI, LIN, CAN; Low Level - Timers, External/Internal
interrupts Input Capture, Output Compare, PWM, ADC, USB) – bo... 阅读全帖 |
|
|
b**t
发帖数: 102 | 27 (有意请先PM, thanks!)
Principal Logic Design Engineer - SATA Expert
The Processor Division of Broadcom Corporation is well known in the
semiconductor industry for providing super high-performance multi-core
network microprocessors. We are staffing up in critical R&D areas in the
high-rise facility at Highway 101 & Great America Parkway
As a senior Logic Design Engineer you will be responsible for performing
micro-architecture and logic design in the development of I/O devices in
high performance mu... 阅读全帖 |
|
q**n
发帖数: 87 | 28 Job Title: Embedded network protocol SW Engineer
Job Requirement
>5 years of experience in embedded SW design, development and debug/
integration for real-time networking or communication systems. Thorough
knowledge of networking protocols especially in Layer 2/Layer 3: Media
Access Control layer and Logical Link Control layer. Be able to translate
communication standard protocols i.e. 802.15.4, 802.15.4e, Power Line
Communication protocols (PRIME, G3) into efficient implementations in MCU.
Fami... 阅读全帖 |
|
s****i
发帖数: 857 | 29 我下年毕业,网投无数简历没有回信.前几天刚收到了Apple的HR的邮件,要走了简历之后
就再没有回信了. 又收到了一些做穿戴设备的公司的邮件要简历,然后也在等消息.
我做embedded hardware/firmware的. 单片机和ARM较多,USB, I2C, UART, Bluetooth
等各种协议非常熟悉. C擅长,JAVA也会写代码.偏硬件数字/模拟电路设计和 C代码编程
.自认为能力还是比较靠谱,项目经历比较多.
请问哪位大侠能内推一下?
还有怎么求人内推? 比如我看中了apple, Microsoft的职位,直接联系HR还是直接联系
员工? 怎么联系内推人?是直接linkedin吗?
谢谢帮我解疑答惑,非常感激. |
|
b**********e
发帖数: 76 | 30 现有很多Firmware和Testing Engineer的Opening，middle/senior/manager level,需
要一定工作经验。工作地点在Milpitas, CA / Chandler, AZ/Salt Lake City, UT/
Marlborough, MA/Longmont, CO
有兴趣请发邮件至
[email protected]
/* */
合适的话我会帮你内部refer
具体职位和要求如下:
Staff/Senior Staff Firmware Engineer:
Responsibilities:
Support customer FW fixes and releases and root cause failures during
product validation, customer qualification, manufacturing test process and
field returns.
Analyze, debug, and resolve firmware issues observed at any ... 阅读全帖 |
|
s*******x
发帖数: 427 | 31 As the Embedded Software Engineer, you will be creating Freescale support
for VisSim. VisSim is a graphical language for simulation and model-based
embedded development. The core product, is used for general modeling,
simulation and control system design applications. With VisSim, you can
quickly develop virtual prototypes of any dynamic system.
Responsibilities:
• Create user interface to configure peripheral blocks.
• Port existing runtime support library to Freescale... 阅读全帖 |
|
n****e
发帖数: 109 | 32 招聘信息：三藩市智能硬件startup ，现有 program manager 一个opening，要求有3
年以上硬件开发管理经验，有管理中国代工厂和供应链经验的优先，有意者请联系我
另外，有熟悉 UART， I2C, DALI 通许协议的firmware engineer 同学，也请联系我。 |
|
N****s
发帖数: 267 | 33 像这个?
管理-领导团队 (必须有技术负责人或管理经验)
+移动应用程序
+全球定位系统+远程信息处理
+手机网络 - 无线技术，包括3G / LTE蜂窝，WiFi，蓝牙LE
+嵌入式系统+固件+引导程序
+物联网
+云后端
+网络安全+加密
+连车技术
+贡献商业或开源项目
and more
Lead Embedded Software Engineer
Full-time - San Francisco
As Getaround’s Lead Firmware Engineer, you’ll be driving the development
of the Getaround Connect – an in-car device designed to securely control
and access your car using a smartphone. If you have always wanted to drive
the Internet of Things and Connected Car, then you'll love this job.
You’... 阅读全帖 |
|
发帖数: 1 | 34 ASML-HMI公司有如下FPGA Sr. Engineer职位内推，Hiring manager重视FPGA技术背景
，有背景合适的童鞋可以将简历发送到l***********[email protected]。
Job Requirements:
1) Minimum qualification
BS/MS/PhD in EE or equivalent, with experience on FPGA and
embedded development;
Solid skills on embedded firmware development for industrial
control sub-systems;
Independent working ability; strong initiative, self-motivation
and team-working attitude;
2) Preferred qualification
Experience on VHDL/V... 阅读全帖 |
|
发帖数: 1 | 35 RT, 过两天要和果子manager电面，谁知道该准备些什么， OS, I2C, UART, SPI还是底
层coding， 另外想问一下面试流程，有几轮电面啊， 请各位给点提示。多谢! |
|
a*******l
发帖数: 650 | 36 level不限，有意者站内联系。
job description大概如下
In this unique position, you will function as a firmware engineer involved
with the technologies of Bluetooth RF, Modem, and Baseband Silicon Solutions
, WiFi/Bluetooth Coexistence System Architecture and Bluetooth Firmware
Solutions. Specific duties include, but are not limited to:
Working closely with systems, ASIC design, and FW engineering to participate
in architecture design and trade off discussions.
Design a FW system to closely work with the underlyi... 阅读全帖 |
|
H**********5
发帖数: 2012 | 37 给大家一个微软打了4年的绿卡广告。如下
几乎有100个vendor发过这个广告。
不知道绿卡广告长什么样的，仔细看看这个，以后就知道怎么区分绿卡广告了
My name is Bhaskar and I'm a recruiter at Tech Mahindra. Our records show
that you are an experienced professional with experience in Firmware
Engineer. This experience is relevant to one of my current openings.
Title: Firmware Engineer 3
Location: Redmond, WA
Duration: Long Term Contract
Mandatory Skills: UEFI and BIOS development. Also good knowledge in Power
and battery Management.
Job Description:
As an embedded firm... 阅读全帖 |
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发帖数: 1 | 39 Job description 请见下。 请发简历至[email protected] 注明内推申请。 我
会电话联系以及介绍公司、薪资情况。公司不是start up， 是一所跨国中型企业。 经
验年限不限，主要是要看是否符合下面的要求。 可以办身份。
Sr. Electrical Engineer (Power Amplifier)
DESCRIPTION
Amplifier driver and power supply development for motion control system
High precision power amplifier driver (PWM or linear) design and development
for motion control system;
AC to DC power supply design and development for motion control system
Analog circuit schematic design
PCB layout
REQUIREMENTS
BS/MS/PhD i... 阅读全帖 |
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I**********1
发帖数: 32 | 40 We are an innovative ASIC technologies and networking company near by
Shanghai,China. We are looking for some Senior Design management on network
Switch ASIC/SOC Design. We will offer very good compensation on the
qualified candidate. If you are interested in them, 请站内联系。
Network Switch ASIC Design VP/Director
Job Description
Job Description:
Responsible for driving development of the high-end Ethernet Switch ASIC.
Must have a strong overall networking background and have had a key role in
desig... 阅读全帖 |
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v******r
发帖数: 1630 | 41
http://www.mobileye.com/technology/processing-platforms/seeq2/
Mobileye EyeQ2® Vision Processor
- Two floating point, hyper-thread 64bit RISC 34KMIPS CPUs running at 324MHZ.
- Five Vision Computing Engines (VCE)
Classifier Engine – CE
• Image scaling & pre-processing units
• Pattern classifier units
•Tracker Engine-Trk
• Image warping & motion analysis unit
Pre-process, Window – PW
• Image Convolver & image pyramid units
• Computes vertical & horizontal ... 阅读全帖 |
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L********r
发帖数: 59 | 42 Job Description:
Candidate must have:
- knowledge about real time OS.
- knowledge about C/C++, and object oriented design concepts
- knowledge about Multi-Threading.
- Knowledge of software development cycle
- Previous embedded development experience
- Good communication and documentation skill
- Good at multitasking Recommended:
- Previous experience with one or more CPU architecture – ARM, PPC, 8051
- Exposure to assembly level programming
- Previous device driver development experience, idea... 阅读全帖 |
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L********r
发帖数: 59 | 43 Job Description:
Candidate must have:
- knowledge about real time OS.
- knowledge about C/C++, and object oriented design concepts
- knowledge about Multi-Threading.
- Knowledge of software development cycle
- Previous embedded development experience
- Good communication and documentation skill
- Good at multitasking Recommended:
- Previous experience with one or more CPU architecture – ARM, PPC, 8051
- Exposure to assembly level programming
- Previous device driver development experience, idea... 阅读全帖 |
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e****a
发帖数: 4783 | 44 【 以下文字转载自 SanFrancisco 讨论区 】
发信人: Laughtiger (dragon), 信区: SanFrancisco
标 题: C Programmer Needed
关键字: C programmer
发信站: BBS 未名空间站 (Thu Feb 17 11:22:34 2011, 美东)
Job Description:
Candidate must have:
- knowledge about real time OS.
- knowledge about C/C++, and object oriented design concepts
- knowledge about Multi-Threading.
- Knowledge of software development cycle
- Previous embedded development experience
- Good communication and documentation skill
- Good at multitasking Recommended:
- Pre... 阅读全帖 |
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d*b
发帖数: 21830 | 45 Sony今年的产品很多idea还是很革命性的，比如MIS接口，连UART都带了，相比之下C/N
做了N年连个接口的标准的影子都没有。还有用EVF取代Optical，这样发展下去估计连
SLR的mirror都不需要了。
但Sony的问题也很明显，比如MIS接口的产品开发严重滞后，到现在MIS的相机／摄像机
都出了5台了，一个MIS接口的备件都没出来。而且nex-6因为这个MIS，连个外置MIC插
口都不留，这样的话，大家拍HD movie还得去买个Zoom不成？
RX-1的设计思想非常先进，但RX-1到现在看来只是个用来验证市场应用和产品设计思想
的实验产品，离真正的实用还有很长的路要走。 |
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d*b
发帖数: 21830 | 46 缺点：
1）Sony的clean room和package都很有问题，刚从Sony warehouse运到的镜头外面有就
灰尘
2）塑料外壳感觉真cheap很多－－更严格的说，只是连腕托的部分是塑料的，顶部和
frame还是镁合金
3) 美能达shoe和smart shoe换成了MIS，一个24pin带UART的数字接口，本来这个问题
不大，但丫的取消了nex-7上的mic input,也竟然还没有提供MIS的专业话筒－－这样跟
专业录音设备sync成了问题－－当然，对很多人来说这个并不是问题。开发这个MIS的
话筒要多困难？一般人都用不了一个月吧？
4）他妈的LCD的外表也是塑料的，连块最廉价的玻璃的钱都省了，如果你把相机跟背带
放一起，be prepared for something...
5）manual写非常confusing, 比如刚开机时，机器需要12秒时间来首先建立数据库，如
果电池不足系统就不让你建立数据库，但竟然还让你拍照，当然每照一张就给一个
error message, manual里啥也没提
6）manual里也没提怎么插memory stick, 就电池盖上... 阅读全帖 |
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h*******g
发帖数: 10585 | 47 ☆─────────────────────────────────────☆
davychen (ilovefeeter) 于 (Sat Nov 17 19:34:44 2012, 美东) 提到:
http://www.youtube.com/watch?v=3SUmFB_Q7kY
可能比奸C的eosm还惨点儿。。。
☆─────────────────────────────────────☆
xchric (FX) 于 (Sat Nov 17 19:39:32 2012, 美东) 提到:
xpro1作为对焦的底线被拿出来比较了，结果还是将其完爆。
☆─────────────────────────────────────☆
nikonshooter (淡出) 于 (Sat Nov 17 20:13:10 2012, 美东) 提到:
不会吧
☆─────────────────────────────────────☆
shifting (反思己过) 于 (Sat Nov 17 20:29:10 2012, 美东) 提到:
可以拿来当风光... 阅读全帖 |
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d*b
发帖数: 21830 | 48 sony mireless相机上用的是MIS（multi interface shoe）接口，不是传统的闪光灯接
口。
MIS接口其实是个加密的UART接口外加analog i/o，除了接传统闪光灯外，更可以接GPS
，recorder, mic, 乃至线控。
即使是传统相机闪光灯接口也不是你说的那么简单，相机要跟闪灯sync,还要提供距离
信息让闪灯变焦，改变闪光强度等， |
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d*a
发帖数: 1863 | 49 【 以下文字转载自 JobHunting 讨论区 】
发信人: dma (mobility), 信区: JobHunting
标 题: 人气旺 问个技术问题 I2C协议
发信站: BBS 未名空间站 (Tue May 28 15:01:57 2013, 美东)
有个sensor以前我们都用analog output
但是为了省钱，现在这种只有digital output I2C接口的, digital output 是counts
我从来没用过类似的数字输出，请问一下这种接口是不是需要一个I2C-USB的转换器 才
能连到电脑上读取输出值啊
ebay上这个可以么? 是否还需要别的硬件?
http://www.ebay.com/itm/New-USB-TO-I2C-IIC-UART-TTL-Adapter-Con |
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