摘要:為了解決信號采集系統的同步串行通訊問題,在理解AVR 單片機SPI接口的通訊原 理和方法的基礎上,分析了AVR 單片機SPI接口的工作過程,設計了AVR單片機和串行A/ D轉換器的同步串行通訊接口,并用程序描述了SPI接口通訊的過程,實現了AVR單片機 通過SPI接口與串行A/D轉換器之間的數據通訊。最后,用實驗和數據分析驗證了設計方 案的可行性。 關鍵詞:SPI接口;AVR單片機;串行A/D
上傳時間: 2013-10-31
上傳用戶:lilei900512
介紹一種基于C8051F060單片機和NAND Flash的數據采集存儲系統,該系統可實現3路信號采樣,每路采樣率為5KS/s,通過異步串行通信接口實現數據傳輸。并詳細說明系統的軟件設計。 Abstract: An acquisition and storage system based on C8051F060and NAND Flash is designed in this paper.The system is used to sample three-channel of signal,5KSPS each channel,and can upload data to test bench through UART(Universal Asynchronous Receiver/Transmitter).The software design is discussed in detail.
上傳時間: 2013-10-12
上傳用戶:Jesse_嘉偉
介紹了一種基于C8051F020單片機的多路壓力測量儀。該測量儀選用電阻應變式壓力傳感器采集壓力信號,并經放大電路處理后送入C8051F020單片機,再由C8051F020單片機內部的A/D轉換器將采集到的壓力信號進行模數轉化,然后分別對數據進行存儲和顯示。該測量儀能測量6路壓力信號,并且各測量點都能單獨檢測和設置。由于采用了C8051F020單片機,簡化了硬件電路,增強了抗干擾能力,使得測量儀具有測量精度高,沖擊小等特點。 Abstract: A measurement apparatus for multi-channel pressure based on single chip microcomputer is introduced.It can measure 6 channels signal of the pressure,and the pressure measure points can be detection and located individually.The pressure signal sampling is obtained by resistor stress-type pressure sensors,the digital signals of 6 channels are collected through amplifying and adjustment circuit of pressure signals and internal integrated A/D converter of MCU.Finally,and it realizes the function to store and display data separately.C8051F020 was used to made hardware circuit simple,and it also enhanced the anti-interference ability.It features high precision and little impact.
上傳時間: 2013-11-16
上傳用戶:yare
概述 BL22P02是一款低功耗8位OTP型微控制器單元(MCU),適用于各類小家電控制。 主要特點 8位CISC結構CPU(Motorola HC05兼容)17個通用IO口8位實時定時器/計數器,其信號源和觸發沿可由軟件設定,可設置溢出中斷7路鍵盤中斷(KBI)2路外中斷(INT)振蕩模式晶振:32K晶振:432K-8MHz內部RC:2MHz@5V、4MHz@5V、6MHz@5V外接電阻低功耗設計(靜態功耗<1uA@5V)內部自振式看門狗計數器(WDT)64byteRAM2K*8bitOTPROM串行燒寫接口電路程序加密功能工作電壓2.0-5.5V@(432K-4M)2.7-5.5V@(432K-8M)封裝形式:DIP20、SOP20、DIP18、SOP18、DIP16、SOP16、DIP14、SOP14、DIP8、SOP8
上傳時間: 2013-10-15
上傳用戶:佳期如夢
針對51單片機系統中常用的A/D轉換器價格高、精度低的缺點,介紹TI公司的16 位的帶有I2C串行接口的A/D轉換器ADS1110的工作原理,給出ADS1110與AT89C51單片機系統的接口電路和軟件設計。實踐證明,ADS1110具有高性價比和實用性。 Abstract: According to the disadvantages of high expense and low accuracy of the general A/D converter used in MCS51 microchip system,the principle and working process of a high accuracy 16-bit A/D conversion ADS1110 which has I2C bus and belongs to TI Company are proposed here as well as the interface of ADS1110 to AT89C51 and software list.It is proved to be high performance index and practicability.
上傳時間: 2013-11-21
上傳用戶:gyq
以AVR單片機ATmega8和USB接口器件PDIUSBD12為核心,基于標準的USB1.1協議,設計一種通用USB接口模塊,以滿足嵌入式系統中對USB接口的需求。對模塊的硬件電路或單片機固件程序的硬件接口層稍加修改即可用于其他各種微處理器。該模塊可為各種嵌入式系統增加USB接口,實現與USB主機系統通信。 Abstract: Based on AVR microcontroller ATmega8 and USB interface chip PDIUSBD12, a general USB interface module is designed according to USB1.1 protocol for various requirements of embedded systems. Only with few modifications in circuit or hardware abstract layer of firmware, the module can be used on many types of microprocessors. All kinds of embedded systems can realize high speed and stable communication with USB host systems, owing to the facility of this module.
上傳時間: 2014-01-08
上傳用戶:趙云興
介紹一種基于單片機的多路溫度采集及監控系統,能夠測量6路溫度信號,具有計算機聯網功能,各測量點可以單獨監控和設置,可根據用戶的需求自動控制。測量溫度范圍為-10 ℃~200 ℃,控制方式采用模擬量調壓模式。該系統具有控制精度高、沖擊小等特點。 Abstract: A temperature collecting and surveillance-controlling system based on sing-chip microcomputer is introduced. It can measure 6 channel signal of the temperature,and it has a function of network connection.The temperature measure points can be monitored and located, it can be controlled automatic according to user’s demand.The temperature range is -10℃ to 200℃.The model of control is adjustable voltage with simulation. It features high precision and little impact.
上傳時間: 2013-10-23
上傳用戶:bjgaofei
摘要:介紹了采取專用電平轉換芯片MAX232實現PC機與MCS51單片機之間的串行通信的方法.通過對系統的通信方式選擇89C51通信波特率的設置、通信的設置,以及對接口電路的軟件和硬件的設計分析,展示了該電路的實用性.關鍵詞:微處理器;PC機;串行通信;RS-232接口;MAX232芯片
上傳時間: 2014-01-22
上傳用戶:shizhanincc
AVR單片機及嵌入式系統--單片機原理及接口技術
上傳時間: 2014-11-08
上傳用戶:yanyangtian
摘要:目前單片機應用系統中顯示接口一般是采用七段LED,只能顯示一些簡單的字符,滿足不了實際應用要求。介紹了中文圖形液晶顯示模塊LCMI2832ZK的主要特點、管腳功能及使用方法,并給出了如何利用LCMI2832ZK模塊為AT89C2051單片機擴展漢字接13的應用實例。調試結果表明此方法簡單可行,可作為單片機漢字顯示接口的一般方法。只要簡單修改接口電路,此模塊也可以用于其他型號的單片機。關鍵詞:單片機;漢字顯示;接口技術
上傳時間: 2013-10-29
上傳用戶:ynzfm