An efficient timer management module design

The timer is one of the basic elements of the normal operation of the communication protocol is mainly used for a variety of digital timer

and frame retransmission task. The communication protocol used in the SCM system timer, timing accuracy is not required, but the number of requirements. Hardware resources are limited, it is impossible for every single task is assigned a hardware timer, only through a single hardware timer simulate a number of software timers to meet the timing needs agreement.


These software timer data structure to organize themselves, and provides a uniform interface, called "Timer". Timer management are mainly two kinds of method:


(1) static array method. Timer node is stored in the array. The advantage is simple logic, occupy less ROM. However, this program has significant disadvantages: when the hardware timer interrupt occurs, the subtraction operation of all timer node, the time overhead and delay uncertainty (related to the timer number).


(2)delta linked list method. Ascending order to form a linked list in accordance with the timing value of the timer. A timer value of timer in front of all the timer value plus the value of the node. Thus, in each clock interrupt handler, only the subtraction operation on a timer node, greatly reducing the time overhead. However, the complex program logic, ROM, dosage, require frequent allocation of recovery of memory, easy to form the memory fragmentation.


The timer management module design is based on a static array method. Use a timer node array to hold all of the timing of the request, a representative of an available timer node of the array. Each timer node has a status indicates that the timer is in idle, or overflow state. Timing value of the timer and the timer expires, the message to be sent is also stored in the timer node, in order to achieve a hardware timer to provide users with a number of software timers.


In order to solve the problem of interrupt processing time overhead, the introduction of an auxiliary timer module, auxiliary timer value is always equal to the minimum timing value of all the timer node. In the hardware timer interrupt processing, only the auxiliary timer subtraction operation, which will greatly reduce interrupt processing time.


Start a timer, the main node to node array in an idle state is set to use. If the new timer is enabled, all timers from time to time to the minimum value, but also to update the auxiliary timer. Function pointer to point to the timer message and time value parameters, start the timer process shown in Figure 2. Successful start-up timer, return the node ID number of the timer.


Software timer is driven by the hardware digital timer. In the hardware timer interrupt, the first auxiliary timer value minus 1. If the auxiliary timer value is 0, then the timer value minimum timer has timed out, the corresponding message should be sent to the user task, the node set to the idle state, and re-calculate the timing values ??of the other nodes, and find the timing value the smallest node, update the auxiliary timer.

Thermometer use after disinfection

The sterilization of a digital thermometer involving soap, water and denatured alcohol is a process that members of the boomer generation know well. But this process has changed and it has changed for reasons unrelated to how effective it was in killing germs.


Wipe off the bulb thermometer with denatured alcohol after its soap and water wash. It should then be placed in a clean protective container. It may also be placed in a covered container of denatured alcohol.


Make sure that you wipe off the ENTIRE AREA of the thermometer that has been touched by the patient. If possible, use denatured alcohol since this is the best bactericidal agent, but you must check with the thermometer's directions since some do not tolerate its use.


Get a new thermometer if you have one with mercury in it. Sterilize other bulb thermometers, using colored alcohol for example, by initially washing it in soap and water.


Use the disposable coverlets on those models designed for their use. Following use, simply wipe off the area of the thermometer that has been exposed to a patient's touch.


Wipe off any area of a digital ear thermometer touched by a patient immediately following use. With the unit's next use, then apply the disposable ear tip. The chances of contamination of an ear thermometer are obviously far less than that for an oral unit, but never underestimate a toddler's ability to slobber over great distances.


Check the instructions that come with a digital thermometer for the way it should be cleaned. This is necessary because different thermometers have different ways of sterilization.

Electronic digital timer automatically sets the heating time

Electronic digital timer capable of automatically setting the time of heating according to the quantity and kind of food being cooked.


The mechanical timer requires the timer needle to be manually rotated whenevercooking time is set, leading to a very much complicated operation. Since indication by the timer is always made solely by means of the needle, an actual lapse of time since the commencement of heating can not be found, if the needle is fixed at a pointof said set time. Conversely where the needle is made to move as time goes on, then it is impossible to trace an originally set time, giving rise to the erroneous observation of time indication on the panel of the timer or the incorrect setting ofcooking time. These errors have often caused the misunderstanding of the initially set time or the wide displacement of a set time from a desired value, resulting in insufficient cooking.


According to this invention there is provided an electronic range fitted with a high frequency generator which comprises a device for setting a value representing the quantity of food being cooked; a device for indicating said set value in theform of digits; a pulse generator; a device for varying the period of pulses generated by said pulse generator according to the quantity and kind of food being cooked; a counter for counting pulses from the pulse generator upon the commencement of afood-heating operation; and a device for bringing the operation of the high frequency generator to an end when a prescribed relationship arises between the counts made by the counter and a value denoting an originally set time.


A general electronic range sets a time of cooking food by a timer. In this case, heating time is set by searching for an optimum length of cooking time for the quantity and kind of food being cooked or by the experience or sense of a personundertaking cooking. Accordingly, the time of cooking the same quantity and kind of food varies from person to person using an electronic range, resulting in a failure to carry out proper cooking.


It is accordingly the object of this invention to provide an electronic range provided with a compact electronic digital timer which can automatically set a proper time of cooking or heating for the quantity and kind of food being cooked and,where required, indicate an originally set time as well as a lapse of time from the initial point of cooking time set in the form of digits.

How to change the different units of the digital thermometer

The digital thermometer is a device that is very good to be at home in the medicine cabinet.There are times when the digital thermometer may not read the temperature in the unit you are familiar with. If you live in the United States,but have a thermometer that reads temperature degrees Celsius, and you want to go to they could turn into units Fahrenheit. How can you change the digital thermometer to different units?


Most digital thermometers have a small menu that you can access by pressing the Start button and hold until the menu flashes on the screen. Some digital thermometers have an additional button on the side of the access to this feature. In order to change the temperature reading on the thermometer must be moved through the list to find the option of conversion. Highlight to read the temperature and want to go out and then in the menu by pressing and pressing the start button again.


If the Digital Thermometer your only reads in Celsius, but you're used to system Fahrenheit, you can also use a similar formula to change the unit of measurement. Using the reading you currently have on the thermometer, you will need to multiply by 9. With that you receive the answer, divide it by 5. Now, you can add 32 to the number in order to reach a temperature reading in Fahrenheit.


With a digital thermometer in hand, you press the button in the upper part of the device. Click on the button until the screen lights up. Will run the version on the button and the digital thermometer in your. Must be set to read on the screen at 0 degrees. Look next to see what the unit of measurement is set. Will have to either type (F 'for Fahrenheit, or' c 'for Celsius.


Another way to change the unit of measurement temperature on the thermometer read your digital standard for the use of mathematical equation. To do this, you will need to have a calculator, a pencil and paper ready.


If you want to use to read degrees Celsius, but the digital thermometer only reads your temperature in Fahrenheit you can change the reading with a formula easy. Take readings you currently have and put 32 of it. The answer is that the gap by 9 and then double what you have at this stage by 7. By following these simple math equation will end up with a degree Celsius.


If you're near a computer, and there to read the temperature with you, you can easily convert the unit converter with temperatures on the Internet. Go to the site on the Internet, such as the National Weather Service, and major figures in the converter. If you have a percentage, then you want to convert to Fahrenheit and vice versa.

How to buy a basal digital thermometer

A regular thermometer is little bit daunting to use as it requires you to keep still for few minutes and moreover it is not perfect in giving readings. A basal digital thermometer is more reliable as it gives you reading by 10th's of a degree. A basal digital thermometer is more accurate than a simple thermometer.


How to use a basal digital thermometer?


Use the basal digital thermometer first in the morning before getting out of bed because it is the best time to measure the temperature. There on you should try to take the temperature from the basal digital thermometer at as close to the same time each day as possible so that you can fill up your daily chart correctly.


The best time to take advantage of digital basal thermometer is when you have taken a five hour uninterrupted sleep. Moreover you can use your digital basal thermometer orally, vaginally or rectally depending on you that which style is best suited to you.


Basal digital thermometer is a latest innovation which can keep you informed of your normal body temperature throughout the day so that you can get to know of the times when your body temperature is high or when your body is going to ovulate.


How to buy a basal digital thermometer?


You can have many options to buy a basal digital thermometer from any route you like. You can have online routes to make purchases of basal digital thermometer. Online stores are widely present in the world but you need to be confident about the route. Moreover you can have another way to buy the basal digital thermometer and that is by visiting the shop on your own.


A basal digital thermometer is extra sensitive thermometer which tracks your body temperature minutest shift or basal temperature. A basal temperature is the normal temperature of the person after awakening in the morning. The basal temperature rises at times of ovulation that is hormonal changes. A basal digital thermometer is easy to use near the middle of the menstrual cycle.

Difference between basal digital thermometer and a regular thermometer


A basal digital thermometer is often used by women when they want to know about their fertile period or ovulation. You can find different types of basal thermometers but a basal digital thermometer is best for the usage especially when you want to make a chart of your basal digital thermometer.