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关于铜包铝线材的说明,为文本文档,内容不多.大约只有三张...
关于铜包铝线材的说明,为文本文档,内容不多.大约只有三张-包铝copper wire on the note as a text document, the contents of not more than. Only about 3
- 2022-01-25 23:05:28下载
- 积分:1
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电话防伪伺服系统
电话防伪伺服系统-telephone security servo system
- 2023-04-29 07:45:03下载
- 积分:1
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蓝牙协议栈可是要钱的喔,这个是开源蓝牙协议栈, 免费的
蓝牙协议栈可是要钱的喔,这个是开源蓝牙协议栈, 免费的-Bluetooth protocol stack But the money Oh, this is open source Bluetooth protocol stack, free
- 2022-03-21 22:25:18下载
- 积分:1
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MODBUS RTU 51与维纶触摸屏通信例程。
应用背景51和维纶触摸屏的通信。MODBUS RTU 51与维纶触摸屏通信例程。支持的功能码:位:01(读)、05(写),字:03(读)、06(写)还有与数码管显示输入的数据!注释的也比较详细。个人觉得移植性也比较好。各种的单片机上可以移植修改,关键技术51单片机与威纶通触摸屏通讯说明
本程序仅作为一个通信示例程序,实际使用需要根据需要修改。
请使用EB8000 V3.45以上软件打开触摸屏程序,程序为压缩后的触摸屏程序,请使用EB8000软件 工具——压缩/解压缩 菜单下的工具先进行解压缩;单片机使用Keil uVision3 V3.50编译
一、硬件连接
使用ATMEl 89S52单片机。
二、软件
1、通讯环境
触摸屏设置为主站,即PLC 类型 MODBUS RTU,通讯参数设为“9600,N,8,1”。
2、触摸屏程序,需要读取八个位,以及八个字,每次最少读取16个位,字可以一次读取一个也可以一次读取八个。
有0X1-0X8八个位切换开关,6X1-6X8八个字输入元件,支持的功能码:位:01(读)、05(写),字:03(读)、06(写)
当没有写操作时,屏不断的向单片机发送如下码(16进制显示):
01 01 00 00 00 10 3D C6 (位读取)
01 03 00 00 00 08 44 0C (字读取)
此时,如果不给屏发送相应返回值的话,屏就会提示“PLC no response”
3、51单片机程序思路及说明
- 2022-02-02 15:58:29下载
- 积分:1
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A. 产生一个长为1000的二进制随机序列,“0”的概率为0.8,”1”的概率为0.2;B. 对上述数据进行归零AMI编码,脉冲宽度为符号宽度的50%,波形采样
A. 产生一个长为1000的二进制随机序列,“0”的概率为0.8,”1”的概率为0.2;B. 对上述数据进行归零AMI编码,脉冲宽度为符号宽度的50%,波形采样率为符号率的8倍,画出前20个符号对应的波形(同时给出前20位信源序列);C. 改用HDB3码,画出前20个符号对应的波形;D. 改用密勒码,画出前20个符号对应的波形;E. 分别对上述1000个符号的波形进行功率谱估计,画出功率谱;F. 改变信源“0”的概率,观察AMI码的功率谱变化情况;-have a length of 1,000 random binary sequence, "0" with a probability of 0.8, "a" with a probability of 0.2; B. above zero AMI data coding, and pulse width of symbols width of 50%, waveform sampling rate Symbol rate for the eight times that he painted before the 20 symbols corresponding waveforms (also given before 20 Source sequence); C. HDB3 code switch to depict the former 20 symbols corresponding waveform; D. Miller to switch codes to depict the former 20 symbols corresponding waveform; E. respectively above 1,000 symbols for the power spectrum waveform estimated to depict the power spectrum; F. Change source "0" the probability to observe AMI code changes in the power spectrum;
- 2022-05-24 14:06:42下载
- 积分:1
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单成像雷达模拟,根据数据与实测数据相类似…
雷达单点成像仿真,主要数据均按照与实测数据相近处理-single imaging radar simulation, in accordance with data similar to the measured data handling
- 2022-02-03 18:23:20下载
- 积分:1
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诺基亚6280原厂的图纸
诺基亚6280原厂的图纸-Nokia 6280 original drawings! ! ! ! ! ! ! ! ! ! !
- 2022-06-16 23:49:11下载
- 积分:1
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CDMA型参考系统
CDMA TYPE REFFERENCE SYSTEMS
- INTRODUCTION
- IS-95 system
- THIRD GENERATION SYSTEMS
- 2022-12-21 09:15:03下载
- 积分:1
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地位的会议程序,支持电子白板、文字、语音接口系统…
一个会商程序,支持白板、文字、语音
界面是基于BCGControlBarPro
语音是基于OPENH323-a status conference procedures, support whiteboard, text, voice interface is based on BCGControlBarPro voice is OPENH323
- 2022-06-29 07:07:35下载
- 积分:1
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dbpsk调制解调程序
SYMPCHUNK sets the number of symbols demodulated at once with a constant carrier frequency and symbol timing offset. This is a fundamental decoder parameter that establishes its carrier and symbol timing tracking bandwidth. Set it too low and the demodulator can"t accurately determine carrier frequency and symbol timing on a noisy signal. Set it too high and the demodulator may not be able to track large symbol rate offsets caused by Doppler shift and/or A/D or spacecraft clock errors. Or it might have trouble tracking high rates of change in the carrier frequency due to Doppler acceleration.The current value of SYMPCHUNK is 4*N1 = 512, where N1 = 128 is the order of the convolutional interleaver. 512 symbols is 512 milliseconds at 1000 symbols/sec, giving a frequency/time determination SNR that is 10*log10(512) = 27 dB greater than the Es/N0, not counti
- 2022-03-05 11:28:24下载
- 积分:1