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SIMCOM-SIM300-AT-COMMAND
SIMCOM公司的SIM300的AT指令中文翻译(SIMCOM SIM 300 AT COMMAND chinese manual)
- 2013-10-09 11:33:23下载
- 积分：1
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yakong
使用stm32在KEIL mdk 的环境下 实现压控增益，其中用的DAC7311芯片和OPA830运放(The use of STM32 to achieve the VCO gain in KEIL MDK environment, the use of DAC7311 chip and the OPA830 op amp)
- 2020-09-28 17:27:44下载
- 积分：1
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bufenshi
完整电能表程序，规约为电力行业标准《DL/T 645-1997 多功能电表通讯规约》，具有红外38K（1200bps），RS485通信（2400bps），具有事件记录，电量计量，密码管理等。(Complete energy meter program, the Statute of the power industry standard " DL/T 645-1997 Multimeters communications Statute infrared 38K (1200bps) RS485 communication (2400bps), event logging, power measurement, password management.)
- 2021-02-25 08:29:38下载
- 积分：1
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STM32_MPU-6050
本例程使用GPIO模拟I2C时序访问三轴陀螺仪芯片MPU-6050。通过串口实时打印MPU-60505的采样数据，每秒刷新一次显示。(The routine use of analog I2C GPIO Timing visit triaxial gyroscope chip MPU-6050. Real-time printing through the serial port MPU-60505 sample data, display refresh every second.)
- 2020-12-14 08:49:14下载
- 积分：1
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Dianzichen_Sheji
采用压力传感器实现重量信号采集，然后就给放大滤波后送给A/D，经单片机进行数据处理，LCD作为显示(The pressure sensor achieve weight signal acquisition, and then to enlarge filtered gave A/D, SCM data processing, LCD as display)
- 2010-12-09 19:02:25下载
- 积分：1
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200711-0054-05
TMS28335初始化完成之后，
1、 先DDS产生73.35hz的方波。（问流量管固定频率）
2、 乘法器的另一个数字端输入乘数直接给一个固定值（按照5v），系数是固定的就是对应PID输出的那个接口，串行十二位信号输出（需要先定好一个GPIO接口）。
3、 再延迟一定的时间0.1s或其他时间之后，开始ad采集信号，分别采两路AD信号，此时不稳定（为什么要等到一定的幅值才开始采集AD信号）
4、 选择250点估计一个频率，频率估计的方法采用计算峰值次数的方法或者过零点，总之是为了保证精度采用时域估计的算法，这一块主要是一个扫频子程序，计算频率共振点。
5、 之后改变DDS的输出频率，循环对512点的数据进行扫频的处理
6、 频率控制完成之后，就可以缓慢降低PID控制输出的参数，此时暂时不计算频率，通过不断调整系数使AB的幅度保持在1 的范围内。
7、 测试幅度控制稳定之后a、采用幅度和频率同时控制b。采集数据进入频率估计和相位差估计的后续程序的大循环
8、 注意：采样和控制是同时进行的，所以要设置中断，以及看懂AD的程序，以及内部存储以及数据处理资源的分配。
(TMS28335 initialization is complete,
1, the first DDS generated square wave of 73.35hz. (Q flow tube fixed frequency)
2, another digital side of the multiplier input multiplier directly to a fixed value (in accordance with 5v), the coefficient is fixed corresponding PID output interface, serial twelve signal output (need to be a good one GPIO interface).
3, and then after a certain time delay 0.1s or other time, ad signal acquisition were collected two AD signal instability (Why wait until a certain amplitude began collecting AD signal)
4, 250 point estimate a frequency, frequency estimation method using the method of calculation of the number of peak or zero crossing, in short, in order to ensure the accuracy of time-domain estimation algorithm, this piece is a sweep subroutine to calculate the frequency resonance point.
5, after the change of the output frequency of the DDS data of 512 points, the loop processing Sweep
6, after the completion of the frequency control, it can sl)
- 2013-04-07 15:03:14下载
- 积分：1
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AD0809
ADC0809做的数字电压表，0-5V，4个LED直接接单片机做显示，动态扫描写的驱动(ADC0809 do the figures in Table 0-6 voltage- 5V, 4 LED SCM done directly, dynamic scan was driven)
- 2020-06-26 07:40:02下载
- 积分：1
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LABjs-2.0.3
LABjs 的核心是 LAB（Loading and Blocking）：Loading 指异步并行加载，Blocking 是指同步等待执行。LABjs 通过优雅的语法（script 和 wait）实现了这两大特性，核心价值是性能优化。LABjs 是一个文件加载器。(LABjs lets you load pretty much any script file, whether you control it or not, with no intrusion or convention for dependencies, other than the order and blocking that you define. It keeps track of what you ve asked for and what has downloaded, and lets you only define a handler once for a group of scripts that will execute together in parallel. The API style (with chaining) makes is very easy to convert a set of script tags in your page into code to load them, without having to worry that race conditions will cause issues for scripts loading in the wrong order if there are explicit dependencies involved.)
- 2014-01-09 15:15:47下载
- 积分：1
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电子钟
说明： 使用STM32单片机开发的简易电子钟，并实现计时报时(A Simple Electronic Clock Developed with STM32 Single Chip Microcomputer)
- 2019-07-07 11:24:38下载
- 积分：1
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F02x_ADC0_TempSensor
c8051f02x单片机模数转换汇编程序。(C8051F02x single-chip analog-to-digital conversion assembler.
)
- 2014-04-14 19:21:05下载
- 积分：1
