Method for analyzing stack use in embedded system

The invention discloses a method for analyzing stack use in an embedded system, which includes the following steps: a) decompiling executive files to get assembly codes; b) counting the stack use of each base block; c) calculating the stack use of each function; d) producing a function calling chart from the assembly codes; e) calculating the stack use of each thread combined with the results of step c and step d; f) conducting the interruptive stack use analysis of a processing function; g) conducting the stack use analysis of the whole system according to the situation of an interrupt switch of the system. In addition to the static analysis of the stack use under the worst operation of the program, the method of analyzing stack use provided by the invention also provides the interruptive stack use analysis of the processing function and the stack use analysis of the whole system according to the situation of the interrupt switch of the system. Through the estimation of the stack use of ...

Portable intelligent dynamic cardiograph

The present invention discloses a portable inelligent type dynamic electro cardiograph, the three channel cardio electric signal is sent to differential amplify circuit through cardio electric lead, after amplifiying, it poasses low channel filter circuit to eliminate interference of high frequency, then send to cophased amplify circuit and amplity to the range suitable for A/D conversion, then the cardioelectric signal is sent to single chip machine to proceed A/D conversion and storage the cardioelectric data in flash storage card. Advantages good anti-interference property, common mode rejection ratio reach 110 dB, high reliability, low power consumption, small volume etc.

Method for dynamic control of data packet length in wireless sensor network

The invention discloses a method for dynamic control of data packet length in a wireless sensor network, which comprises the following steps that: a request module of a source node transmits a request to a module for dynamic control of data packet length for transmission of a data packet to a target node; a link estimation module of the source node for dynamic control of data packet length estimates the link quality to obtain the optimal data packet length; if the length of the data packet transmitted on request is smaller than the optimal data packet length, the data packet is processed through polymerization and then identity addition or direct through identity addition and is then transmitted to the transmitting module of the source node, otherwise, the data packet is processes throughsegmentation and then identity addition and is then transmitted to the transmitting module of the source node; the data packet is sequentially transmitted to the receiving module and the module for dynamic ...

Method for dynamically allocating internal memory for wireless sensing network node operating system

The invention discloses a dynamic memory allocation method in wireless sensor network nodes operating system, which comprises the steps of editing source code, precompiling, local compiling, simulating, analyzing and installing. According to the invention, the execution time and space efficiency of dynamic memory access can be enhanced and improved, application developers can flexibly control candidate dynamic memory allocation algorithms and analyzing parameters of an analyzer. The method selects a dynamic allocation algorithm for a specific application by means of a simulator and an analyzer, such that an application actually disposed on wireless sensor network nodes obtains optimal performance and minimal memory cost.

Method for fusing wireless sensing network operating system inner core

Method for analyzing stack use in embedded system

Method for fusing wireless sensing network operating system inner core

The invention discloses a method inosculating the wireless sensing network operating system inner cores. A scheduling agent module receives tasks of the target operating system, regulates the data types of the tasks, adding priority and scheduling algorithm, transmits the tasks to a base operating system, and completes the scheduling and operation of the tasks; the interrupt hook module entrance is embedded in the hardware driver of the target operating system, so that the implementation of the disruption response function is shifted in the interrupt hook module, according to the priority of the interruption number, the interrupt numbers and interrupt entrance address are inserted into the interrupt scheduling system of the base operating system to schedule and implement; hardware virtual and clock frequency dividing are used, the timer of the bottom layer operating system simulates a hardware clock for the target operating system, and simulates all registers of the hardware clock counter ...

Method for dynamic control of data packet length in wireless sensor network

Method for deploying node procedure of wireless sensing network

The invention discloses a method for deploying a node procedure of a wireless sensing network. The method comprises the following steps of: separating an application procedure into a replaceable component and a system component; changing the calling mode of the system component into jump table indirect calling by the replaceable component; forming a target file by an application procedure source code and a jump table, and chaining the target file to make the target file an executable file; burning the executable file into all the nodes of the wireless sensing network in a way of wired deployment, and restarting all the nodes; executing the application procedure by all the nodes; allowing a user to modify the source code of the replaceable component; relabelling the source code of the replaceable component; adding table items into the pre-compile jump table used in the initial deployment; forming a target file by the source code of the replaceable component and the jump table added with ...