There is nothing new about implementing TCP/IP (Transmission Control Protocol/Internet Protocol) on Microchip microcontrollers. Interested developers can easily find many commercial and non-commercial implementations of TCP/IP for Microchip products. This application note details Microchip’s own freely available implementation of the TCP/IP stack. The Microchip TCP/IP Stack is a suite of programs that provides services to standard TCP/IP-based applications (HTTP Server, Mail Client, etc.), or can be used in a custom TCP/IP-based application. To better illustrate this, a complete HTTP Server application is described at the end of this document and is included with the stack’s source code archive. The Microchip TCP/IP Stack is implemented in a modular fashion, with all of its services creating highly abstracted layers. Potential users do not need to know all the intricacies of the TCP/IP specifications to use it. In fact, those who are only interested in the accompanying HTTP Server application do not need any specific knowledge of TCP/IP. This application note does not discuss the TCP/IP protocols in depth. Those who are interested in the details of the protocols are encouraged to read the individual Request for Comment (RFC) documents.
In a properly configured Ethernet connection, the TX port of one node is connected to the RX port of the other node, and vice-versa. In star topology UTP Ethernet networks, this crossover is typically done in the switch/hub/router’s connection to the Ethernet jack. As a result, most UTP Ethernet cables have a 1-to-1 pin mapping between the connectors on the ends of the cable. Cables of this type are commonly referred to as .straight-through cables. However, a different type of cable exists, called a .crossover cable. This type of cable internally crosses the TX and RX port on one end of the cable to the RX and TX port on the other end of the cable, respectively. This type of cable allows two end Ethernet devices to communicate with each other when directly connected as a point-to-point network. Additionally, crossover cables allow a switch/hub/router to communicate with another switch/hub/router. Using an incorrect cable type will not damage compliant Ethernet nodes, but neither node will be able to communicate or detect a link. To eliminate cabling mismatches and reduce consumer frustration, a feature called auto-crossover may option- ally be implemented in a node. When implemented, an auto-crossover capable node will automatically swap its TX/RX pins between TX and RX until a link is established. In this manner, either a crossover or patch cable may be used with the node with the same results. It is only necessary that one node in a linked pair implement auto-crossover. Most modern switches, routers, etc., implement auto-crossover.
The concept of living a healthy life is striking the brains of almost everyone who wants to live their life with good health and long life. This is a good thing but people become lazy to start up things for a healthy life. The most important thing to achieve a healthy life is to eat nutritional foods.
Just maintain a balanced diet of nutritional foods. Diet is different from eating healthy, keeping the practice of having healthy foods will reduce the risk of getting more health problems. Proper healthy food will lower the chances of getting obesity, heart problems, type 2 diabetes and so on. Attaining healthy life will increase your energy level and stamina, thereby you can enjoy your life which you were unable to do in your past unhealthy life. Fruits and vegetables are ignored in our food, this leads to poor diets. To have fruits and vegetables in our food is a general advice but let this be a reminder for a healthy life. We mostly interested and committed in eating meat. We should try to limit the amount of meat we intake. Do not deny eating meat as it contains proteins but be in control of the amount you eat.
Eating alone will not mean a healthy life, most importantly physical activities must be included to keep our body fit and energetic. Physical activities does not mean the rigorous workouts in the gym, it can be walking, jogging, swimming, playing tennis, badminton and some other outdoor games which you are comfortable with. Using stairs instead of lifts is also a physical activity. Keeping our mind calm and active is also important for a healthy life. Meditation and yoga will give your mind more strength. Eating healthy foods, doing physical activities and keeping the mind strong will make your life a healthy one with good health and exposure in enjoying the life.
Palau (puhl OW) is a small island country in the western Pacific Ocean. It has about 200 islands. Palau is about 500 miles (800 kilometers) east of the Philippines. It is part of a large island group called Micronesia (MY kruh NEE zhuh). Koror is the capital city of Palau.
Most of Palau is surrounded by a coral reef, and underwater hill made of the skeletons of may tiny animals. The northern islands were formed by volcanoes. They have rich soil and thick forests. The southern islands are mostly coral rock.
Most of Palau’s people are related to the first people who settled there thousands of years ago. About two –thirds of the people live on Koror Island. They speak Palauan and English. Most of the people are Christians. The rest follow a local religion that keeps its old traditions.
Many people in Palau work for the government. The others are mostly farmers who live in small villages. They raise barely enough food to earn a little money. Some people fish for a living. Tuna is an important product. Tourism, or showing visitors the country, is important to Palau.
The first people arrived in Palau at least 4,000 years ago. They probably came from Southeast Asia. In the late 1800’s, Spain ruled Palau. Then Germany took control. After World War I (1914-1918), Germany lost the islands. Japan controlled Palau until he end of World War II (1939-1945). Then the United States took over. Palau became independent in 1994.