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We have seen some of the features of 8051 microcontrollers. Now in this section, we will discuss different features of it. The 8051 Features are like below8051 has 8-bit Processing Unit to control applications.Using 8051 we can process bits, or in other words, the bit processing capability is present in the 8051microcontroller.8051 has separate Data memory and separate program memory spaces. The program memory is basically 4KBof on-chip EPROM (address space 0000H to 0FFFH), and 128 bytes of RAM (address space 00H to 7FH)There is total 64KB of program memory address space including the on-chip 4KB space.The RAM Address space (128 ... Read More
To take a screenshot of an iOS Application running in Simulator you can you any of the below ways.Capturing device Screen − you can capture your Mac's screen from the area your simulator is running in. to do this you have to press, Command, shift and 4 at the same time, then drag to select the area you want to capture. Alternatively you can press 3 instead of 4 to capture the whole screen.Open simulator, and press Command along with S at the same time, this will take a screenshot and save on desktop generally.you can also open simulator, go ... Read More
The Intel 8085 is an 8-bit microprocessor produced by Intel and introduced in 1976. It is a software-binary compatible with the more-famous Intel 8080 with only two minor instructions added to support its added interrupt and serial input/output features. When the 8085desires to receive 8-bit information, it receives it on these eight pins AD7, AD6, …, AD0. These eight pins are collectively called AD7-0. They are called basically “Address Data”. When the 8085 desires to send out 8-bit information, it sends it out on these same pins. these pins are bi-directional pins.The same lines are used for both receiving information and ... Read More
To hide the back button on navigation bar we’ll have to either set the navigation button as nil and then hide it or hide it directly.Let’s create a project, add 2 view controller and Embed them in navigation controller. Let’s see how this project looks when run without any code to remove the navigation bar.This code set’s the navigation bar’s back button as hidden.self.navigationController?.navigationItem.hidesBackButton = trueThis code set’s the navigation bar’s back button as nilself.navigationItem.leftBarButtonItem = nil;A combination of these to approaches would be a better solution and works even if you have set a custom navigation bar.self.navigationItem.leftBarButtonItem = nil ... Read More
There are various versions of 8051 Microcontroller. These versions are 8051H, 8051BH and 8051CH. Here we will see the general 8051 Microcontroller. This microcontroller works on a +5V dc power source. As it has on-chip clock circuit, so we need only the crystal oscillator between the pin XTAL1 and XTAL2 with two additional capacitors. As we have mentioned that the general clock frequency is 12MHz, but some other version of 8051 uses 20MHz crystal oscillator. There is a clock dividing circuit to divide the clock frequency to provide an internal clock pulse. So for 12MHz clock, it is divided into ... Read More
The Intel 8085 ("eighty-eighty-five") is an 8-bit microprocessor produced by Intel and introduced in 1976. It is a software-binary compatible with the more-famous Intel 8080 with only two minor instructions added to support its added interrupt and serial input/output features. Intel 8085 can read or write 8 bits at a time. Also, memory is used for storing data and results, 8 bits in each memory location. Like two memory locations and four memory locations, if there are eight memory locations, 3-bit address is needed to specify the location of interest. If address is 000, location 0 is selected, etc. and ... Read More
In this article we’ll learn about Corona, PhoneGap and Titanium, though all these technologies are different, the common thing between these is that they all are cross platform. i.e they can be used to write program once and then run that on multiple platforms like iPhones and android devices.Corona − Corona is a free and open source SDK (Software development kit), developed by corona Labs roughly 10 years ago in 2009. Corona is mainly for developing 2D mobile applications for most of the platforms including iOS, Android, Desktop/ Windows Applications. Corona is based on top of C++ and openGL to ... Read More
We have already discussed that the 8051 microcontroller has the internal program memory. In this chip, there is EA pin. It indicates the External Access. So by using this pin, we can check whether the internal program memory is used or not. So when there is a low signal in this pin, the internal 4K bytes of program memory is not used, but in this situation, it can access only the ROM.When we are trying to access the external data memory, then the read RD or write WR will be the output from 8051. So for reading the data from ... Read More
The 8051 has 128 bytes of On-Chip RAM. So for accessing that RAM area, the address space is 00H to 7FH. When we need more data memory, we can use external RAM. The address space of external RAM is 0000H to FFFFH.The external and internal data memory can be added to increase the total amount of data memory. When we are trying to access the external data memory, then the read RD or write WR will be the output from 8051. The external data memory address can be either 8-bit or 16-bit wide. Generally, the one 8-bit address is used ... Read More
DefinitionBit stuffing is the mechanism of inserting one or more non-information bits into a message to be transmitted, to break up the message sequence, for synchronization purpose.Purpose of Bit StuffingIn Data Link layer, the stream of bits from the physical layer is divided into data frames. The data frames can be of fixed length or variable length. In variable - length framing, the size of each frame to be transmitted may be different. So, a pattern of bits is used as a delimiter to mark the end of one frame and the beginning of the next frame. However, if the ... Read More