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基于TMS320C5515设计的心电图(ECG)MDK开发技术

作者:时间:2010-08-23来源:网络收藏

DSP是医疗开发套件(Rev. B)支持完整的医疗应用开发如),数字听诊器和脉冲血氧计等。典型应用包括模拟前端(AFE),信号处理算法以及用户控制与交互。是低功耗定点数字信号处理器(DSP),采用TMS320C55x™ DSP处理器核,内核工作电压1.05V/1.3V,I/O电压为1.8/2.5/2.75/3.3V。
16.67/13.33/10/8.33-ns 指令周期,时钟速率60-,75-,100-,120-MHz,具有320KB 片内RAM。

本文引用地址:http://www.eepw.com.cn/article/173251.htm


图1。方框图

医疗开发套件(

A number of emerging medical applications such as electrocardiography (), digital stethoscope, and pulse oximeters require DSP processing performance at very low power. The TMS320C5515 digital signal processor (DSP) is ideally suited for such applications. The C5515 is a member of TI’s C5000™ fixed-point DSP platform. To enable the development of a broad range of medical applications on the C5515, Texas Instruments has developed an based on the C5515 DSP. A typical medical application includes:

• An analog front end, including sensors to pick up signals of interest from the body

• Signal processing algorithms for signal conditioning, performing measurements and running analytics on measurements to determine the health condition

• User control and interaction, including graphical display of the signal processing results and connectivity to enable remote patient monitoring

The is designed to support complete medical applications development. It includes the following elements:

• Analog front-end boards (FE boards) specific to the key target medical applications of the C5515 (, digital stethoscope, pulse oximeter), highlighting the use of the TI analog components for medical applications

• C5515 DSP evaluation module (EVM) main board

• Medical applications software including example demonstrations

图2。医疗开发套件(MDK)硬件方框图

MDK Hardware Overview

An electrocardiogram (ECG/EKG) is the recording of the electrical activities of the heart and is used in the investigation of heart disease. The electrical waves can be measured by selectively placed electrodes (electrical contacts) on the skin.

医疗开发套件(MDK)ECG主要特性:

The key features of the MDK ECG system are:

• 12 lead ECG output using 10 electrode input

• Defibrillator protection circuitry

• Diagnostic quality ECG with bandwidth of 0.05 Hz to 150 Hz

• Heartbeat rate display

• Leads off detection

• Real-time 12 lead ECG waveform display on EVM LCD screen, one lead selectable at a time

• Zoom option for the Y-axis (amplitude) on EVM LCD screen

• Real-time 12 lead ECG waveform display on PC, three leads at a time

• Zoom function on X-axis (time) and Y-axis (amplitude) on PC application

• Freeze screen option on PC Application

• Recording of ECG data and offline view option of recorded ECG data on PC application Several elements of the MDK ECG system are:

• C5515 EVM

• ECG front-end board

• ECG cable

1)C5515 EVM

The EVM comes with a full compliment of on-board devices that suit a wide variety of application environments.

For further details on the C5515 EVM, see the Medical Devlopment Kit provided with your EVM.

Key components and interfaces of the C5515 EVM used in the MDK ECG system include:

• Texas Instrument’s TMS320C5515 operating at 100 MHz

• User universal serial bus (USB) port via the C5515

• Inter-integrated circuit (I2C) /serial peripheral interface (SPI) electrically erasable programmable read-only memory (EEPROM)

• External memory interface (EMIF), I2C, universal asynchronous receiver/transmitter (UART), SPI interfaces

• SAR

• External IEEE Standard 1149.1-1990, IEEE Standard Test Access Port and Boundary-Scan Architecture (JTAG) emulation interface


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