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  • MSP430 USB JTAG自制资料

    The MSP-FET430U14 is a powerful flash emulation tool to quickly begin application development on the MSP430 MCU. It includes USB debugging interface used to program and debug the MSP430 in-system through the JTAG interface or the pin saving Spy Bi-Wire (2-wire JTAG) protocol. The flash memory can be erased and programmed in seconds with only a few keystrokes, and since the MSP430 flash is ultra-low power, no external power supply is required. The debugging tool interfaces the MSP430 to the included integrated software environment and includes code to start your design immediately.  The MSP-FET430UIF development tools supports development with all MSP430 flash devices

    标签: JTAG MSP 430 USB

    上传时间: 2013-10-28

    上传用户:13691535575

  • arm指令集(1)

    arm指令集(1)  ARM跳转指令可以从当前指令向前或向后的32MB地址空间跳转。这类跳转指令有以下4种。   (1)B 跳4专指令   B〔条件) (地址)   B指令属于ARM指令集,是最简单的分支指令。一旦遇到一个B指令,ARM处理器将立即跳转到给定的地址,从那里继续执行。注意:存储在分支指令中的实际值是相对当前R15的值的一个偏移量,而不是一个绝对地址。它的值由汇编器来计算,是24位有符号数,左移两位后有符号扩展为32位,表示的有效偏移位为26位(+/- 32 MB)。   (2)BL 带返回的跳转指令   BI,〔条件) (地址)   BL指令也属于ARM指令集,是另一个分支指令。就在分支之前,在寄存器R14中装载上R15的内容,因此可以重新装载R14到R15中来返回到这个分支之后的那个指令处执行,它是子例程的一个基本但强力的实现。   (3)BLX 带返回和状态切换的跳转指令   BLX <地址>   BLX指令有两种格式,第1种格式的BLX指令记作BLX(1)。BLX(1)从ARM指令集跳转到指令中指定的目标地址,并将程序状态切换到Thumb状态,该指令同时将PC寄存器的内容复制到LR寄存器中。   BLX(1)指令属于无条件执行的指令。   第2种格式的BLX指令记作BLX(2)。BLX(2)指令从ARM指令集跳转到指令中指定的目标地址,目标地址的指令可以是ARM指令,也可以是Thumb指令。目标地址放在指令中的寄存器<dest>中,该地址的bit[0]值为0,目标地址处的指令类型由CPSR中的T位决定。该指令同时将PC寄存器的内容复制到LR寄存器中。   (4)BX 带状态切换的跳转指令   BX(条件) (dest)   BX指令跳转到指令中指定的目标地址,目标地址处的指令可以是ARM指令,也可以是Thumb指令。目标地址值为指令的值和0xFl·FFFFFF做“与”操作的结果,目标地址处的指令类型由寄存器决定。

    标签: arm 指令集

    上传时间: 2014-12-27

    上传用户:laomv123

  • PCA954X家庭的I C SMBus多路复用器与开关

    The Philips family of Multiplexers and Switches consists of bi-directional translating switches controlled via the I2C or SMBus to fan out an upstream SCL/SDA pair to 2, 4 or 8 downstream channels of SCx/SDx pairs. The Multiplexers allow only one downstream channel to be selected at a time, while the Switches allow any individual downstream channel or combination of downstream channels to be selected, depending on the content of the programmable control register. Once one or several channels have been selected, the device acts as a wire, allowing the master on the upstream channel to send commands to devices on all the active downstream channels, and devices on the active downstream channels to communicate with each other and the master. External pull-up resistors are used to pull each individual channel up to the desired voltage level. Combined interrupt output and hardware reset input are device options that are featured.

    标签: SMBus 954X PCA 954

    上传时间: 2013-10-11

    上传用户:dianxin61

  • 68HC05K0 Infra-red Remote Cont

    The MC68HC05K0 is a low cost, low pin countsingle chip microcomputer with 504 bytes of userROM and 32 bytes of RAM. The MC68HC05K0 isa member of the 68HC05K series of devices whichare available in 16-pin DIL or SOIC packages.It uses the same CPU as the other devices in the68HC05 family and has the same instructions andregisters. Additionally, the device has a 15-stagemulti-function timer and 10 general purposebi-directional I/0 lines. A mask option is availablefor software programmable pull-downs on all ofthe I/O pins and four of the pins are capable ofgenerating interrupts.The device is ideally suited for remote-controlkeyboard applications because the pull-downs andthe interrupt drivers on the port pins allowkeyboards to be built without any externalcomponents except the keys themselves. There isno need for external pull-up or pull-down resistors,or diodes for wired-OR interrupts, as these featuresare already designed into the device.

    标签: Infra-red Remote Cont 05K

    上传时间: 2014-01-24

    上传用户:zl5712176

  • 51单片机拼音中文输入法c程序源代码

    拼音输入法杳询函数: unsigned char code * py_ime(unsigned char input_py_val[]); input_py_val为已输入的拼音码字符串头指针, 反回值为中文的起始地址,当为0时,杳询失败 应用举例: {  unsigned char input_string[]={"bang"};  unsigned char chines_string[100];  sprintf(chines_string,"%s",py_ime(input_string)); }

    标签: 51单片机 输入法 程序 源代码

    上传时间: 2014-03-18

    上传用户:gxy670166755

  • 基于ATmega128的智能机器人小车控制系统设计

    摘要:基于ATmega128单片机的智能小车控制系统。通过光电编码器实现对小车速度的测量并将速度值进行bang—bang+PID运算.产生控制直流电机转速的PWM电压信号,实现对车速的快速调整和精确控制。小车控制系统还配有避障和灰度传感器。用于检测障碍物和地面灰度,实现小车避障和寻迹功能。

    标签: ATmega 128 智能机器人 控制系统设计

    上传时间: 2013-10-29

    上传用户:清风冷雨

  • 亚惠快餐管理信息系统 包括亚惠快餐管理的各项功能

    亚惠快餐管理信息系统 包括亚惠快餐管理的各项功能,含BI分析

    标签: 管理信息系统

    上传时间: 2013-12-19

    上传用户:gxf2016

  • 电力系统在台稳定计算式电力系统不正常运行方式的一种计算。它的任务是已知电力系统某一正常运行状态和受到某种扰动

    电力系统在台稳定计算式电力系统不正常运行方式的一种计算。它的任务是已知电力系统某一正常运行状态和受到某种扰动,计算电力系统所有发电机能否同步运行 1运行说明: 请输入初始功率S0,形如a+bi 请输入无限大系统母线电压V0 请输入系统等值电抗矩阵B 矩阵B有以下元素组成的行矩阵 1正常运行时的系统直轴等值电抗Xd 2故障运行时的系统直轴等值电抗X d 3故障切除后的系统直轴等值电抗 请输入惯性时间常数Tj 请输入时段数N 请输入哪个时段发生故障Ni 请输入每时段间隔的时间dt

    标签: 电力系统 计算 运行

    上传时间: 2015-06-13

    上传用户:it男一枚

  • 电力系统静态稳定计算一般采用小干扰法

    电力系统静态稳定计算一般采用小干扰法,即首先计算近似的线性微分方程组系数矩阵的特征根。然后根据特征根在复平面上的特性,判别电力系统运行的稳定性 操作说明: 请输入初始功率S0,形如a+bi 请输入无限大系统母线电压V0 请输入系统直轴等值电抗的大小Xd 请输入同步电角速度 请输入惯性时间常数Tj 请输入综合阻尼系数D

    标签: 电力系统 干扰 计算

    上传时间: 2013-12-17

    上传用户:zhengzg

  • Rotating shafts experience a an elliptical motion called whirl. It is important to decompose this mo

    Rotating shafts experience a an elliptical motion called whirl. It is important to decompose this motion into a forward and backward whil orbits. The current function makes use of two sensors to generate a bi-directional spectrogram. The method can be extended to any time-frequency distribution % % compute the forward/backward Campbell/specgtrogram % % INPUT: % y (n x 2) each column is measured from a different sensor % /////// % __ % |s1| y(:,1) % |__| % __ % / \ ________|/ % | | | s2 |/ y(:,2) % \____/ --------|/ % % Fs Sampling frequnecy % % OUTPUT: % B spectrogram/Campbel diagram % x x-axis coordinate vector (time or Speed) % y y-axis coordinate vector (frequency [Hz])

    标签: experience elliptical decompose important

    上传时间: 2015-06-23

    上传用户:372825274