3) Download om/simulator/ “Assm” is used to manually step through the code and observe individual steps. Veja grátis o arquivo The EdSim51 Beginner’s Guide to the enviado para a disciplina de Microcontroladores Categoria: Outros – 2 – The Paperback of the EdSim51’s Guide to the core of the popular 51 series of 8-bit microcontrollers by James Rogers at Barnes & Noble.

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This means the user can create eight custom characters.

Each nibble has a range of zero to nine. The scope’s horizontal scale is tied in with the system clock frequency this is unrealistic, but I feel it’s adequate for simulation purposes. Below is a list of its features:. This is not altogether true. However, while this is very useful for debugging, it meant the user would need to wait a long msnual for things to happen examples: Code memory can also be examined and edited, as shown in the image above.

To view another area of code memory, enter the start address in the blue box.

Therefore, the OV flag is set to alert the program that the result is out of range. However, this means the code pane is quite small. Data can be transmitted to the ‘s serial port by typing text in the Tx window and clicking on the Tx Send button, which initiates transmission. The high nibble is sent first, followed by the low nibble. Labels are followed by a semicolon.


Because it reads the high nibble first, the Function set high nibble must be sent again, followed by the low nibble.

The EdSim51 Beginner’s Guide to the 8051

The image to the right: Originally, the simulator ran with a system clock frequency of 12 MHz. An example for port 2 is shown below. When the enable pin is taken high and then low, this causes the module to read the pins DB7-DB4 and store them in either the IR if an instruction is being sent – ie: When this button is clicked the title changes to Comparator Enabled and the input voltage slider’s title changes from ADC to Comparatoras shown opposite.

As can be seen in the diagram below, the LED bank, the DAC inputs and the 7-segment display data lines all share port 1.

EdSim51 – User’s Guide

You can now save your source code in Intel HEX format. Therefore, keypad interrupt and multiplexing the 7-segment display cannot be used at the same time – the keypad AND gate should be disabled.

The zoom button is located below the red Exit button. You can select code in the assembly text area and copy it to the system clipboard using the Copy button, the same as you do in your word processing package. The UART can be set to even parity, odd parity or no parity by clicking on the Parity button, cycling through the three options: The enable pin E, connected to P1. By default the keypad mode is set to Standard.

Instead you should use busy-waiting on the keypad. F5H must be written as 0F5H. To do so, the user encloses the set in curly braces, each number separated by a comma, as shown in the image opposite. The WR line connected to Edism51. Each character is made up of eight rows, with five dots in each row. Therefore, keypad interrupt can be used at the same time as the LCD module.


The simulator was designed so that everything is visible on the screen at the same time – the internal registers, the source code, the peripherals, etc. The assembler is not case-sensitive.

To multiplex the displays and use the keypad at the same time, the keypad must be implemented using busy waiting. Also, if you let the mouse pointer hover over one of the bits momentarily, the bit’s description is displayed, as shown below:.

If maunal numbers are being treated as signed numbers then 8AH is as a signed number — in decimal. A breakpoint can be set by double-clicking the instruction’s address, as shown in the images below. In the logic diagram extract above you can see the switch between the comparator output and P3.

The user can switch edsi51 the 7-segment display and the LCD module, as illustrated, by clicking on the blue button above the display. Standard – in standard mode the keys are independent of each other.