TUTORIAL BASCOM AVR PDF

Aim of this course is to give essential programming knowledge linked together to the necessaries technical hardware information needed to correctly handle the card equipped with micro available on the market. This is the reason why some hardware basic elements are stated and through them it is possible to begin the different experiments. Hereunder are listed all Data Sheets links to be addressed to for a profitable use of the different given examples. UNTIL 1. Counting use with DO.

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You can simulate your programs with AVR Studio or any other Simulator available or you can use the built in Simulator. The default is the built in Simulator. Program Simulate shortcut : , F2. This is the RUN button, it starts a simulation. You can also press F5. The simulation will pause when you press the pause button. It is advised, that you step through your code at the first debug session. When you press F8, you step through the code line by line which is a clearer way to see what is happening.

Pressing this button will pause the simulation. This is the STOP button. Pressing this button will stop the simulation. You need to press the RUN button when you want to simulate your program again. This is the STEP button. The simulator will go to the RUN state. It has the same effect as the STEP button, but sub programs are executed completely, and th simulator does not step into the SUB program. The simulator will RUN until it gets to the current line.

The line must contain executable code. Move the cursor to the desired line before pressing the button. This button will show the processor registers window. The values are shown in hexadecimal format. To change a value, click the cell in the VAL column, and type the new value. When you right click the mouse, you can choose between the Decimal, Hexadecimal and Binary formats.

The register window will show the values by default in black. When a register value has been changed, the color will change into red. Each time you step through the code, all changed registers are marked blue. This way, the red colored value indicate the registers that were changed since you last pressed F8 step code.

A register that has not been changed at all, will remain black. This is the IO button and will show processor Input and Output registers. And the colors also work the same as for the registers : black, value has not been changed since last step F8. Red : the value was changed the last time your pressed F8.

Blue : the value was changed since the begin of simulation. When you press the STOP-button, all colors will be reset to black. Pressing this button shows the Memory window.

When you move from cell to cell you can view in the status bar which variable is stored at that address.

The colors work exactly the same as for the register and IO windows. Since internal ram is cleared by the compiler at startup, you will see all values will be colored blue. You can clear the colors by right clicking the mouse and choosing 'Clear Colors'. The refresh variables button will refresh all variables during a run F5. When you use the hardware simulator, the LEDS will only update their state when you have enabled this option. Note that using this option will slow down simulation.

That is why it is an option. When you use F8 to step through your code you do not need to turn this option on as the variables are refreshed after each step.

When you want to simulate the processors internal timers you need to turn this option on. Simulating the timers uses a lot of processor time, so you might not want this option on in most cases.

When you are debugging timer code it is helpful to simulate the timers. The simulator supports the basic timer modes. As there are many new chips with new timer modes it is possible that the simulator does not support all modes.

PWM mode is not simulated. This option allows you to use a real terminal emulator for the serial communication simulation. Normally the simulator prints serial output to the blue window, and you can also enter data that needs to be sent to the serial port.

When you enable the terminal option, the data is sent to the actual serial port, and when serial data is received by the serial port, it will be shown. When enabled, a file with the name of your project will be created with the.

This file will contain the file, line number and source code that is executed. It is intended to check which parts of your code execute. This section allows you to see the value of program variables. You can add variables by double clicking in the Variable-column. A list will pop up from which you can select the variable. During simulation you can change the values of the variables in the Value-column, Hex-column or Bin-column. It is also possible to watch a variable by selecting it in the code window, and then pressing enter.

It will be added to the variable list automatically. Notice that it takes time to refresh the variables. So remove variables that do not need to be watched anymore for faster simulation speed.

Only local variables are shown. The Watch-TAB can be used to enter an expression that will be evaluated during simulation. When the expression is true the simulation is paused. To enter a new expression, type the expression in the text-field below the Remove button, and press the Add-button. When you press the Modify-button, the current selected expression from the list will be replaced with the current typed value in the text field.

To delete an expression, select the desired expression from the list, and press the Remove-button. During simulation when an expression becomes true, the expression that matches will be selected and the Watch-TAB will be shown. The software stack, hardware stack, and frame pointer values are shown. The minimum or maximum value that occurred during simulation is also shown. When one of these data areas enter or overlap another one, a stack or frame overflow occurs. Pressing the snapshot-button will save a snapshot of the current register values and create a copy of the memory.

Only the interrupts that are used will be enabled. This is how you simulate the interrupts. When you have enabled 'Sim Timers' it can also trigger the event. First select the desired pin from the pull down box. Depending on the chip one or more pins are available. Most chips have 2 counters so there will usually be 2 input pins.

Next, select the number of pulses and the desired delay time between the pulses, then press the Pulse-button to generate the pulses. Under the window with the TABS you will find the terminal emulator window. It is the dark blue area. When you use INPUT in your program, you must set the focus to the terminal window and type in the desired value. Notice that most microprocessors have only 1 UART. It contains the source code of the program you are simulating. All lines that contain executable code have a yellow point in the left margin.

By holding the mouse cursor over a variable name, the value of the variable is shown in the status bar. In order to use the function keys F8 for stepping for example , the focus must be set to the Source Window. By pressing the hardware simulation button the windows shown below will be displayed.

The top section is a virtual LCD display. It works to display code in PIN mode, and bus mode. For bus mode, only the 8-bit bus mode is supported by the simulator.

Right beside the PIN led's, there is a track bar. This bar can be used to simulate the input voltage applied the ADC converter. Note that not all chips have an AD converter. You can set a value for each channel by selecting the desired channel below the track bar. Next to the track bar is a numeric keypad. By clicking the button you can simulate the actual processor ports in-circuit!

It is best to set the lock bits so the monitor does not get overwritten if you accidentally press F4.

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bascom avr tutorial

Prior to starting this tutorial, you should verify that the FTDI drivers are installed correctly and verify that your Papilio One board is working correctly by following the Papilio One Quickstart Guide. The real power of using an FPGA is that you can synthesize additional hardware and logic on the same chip that can be internally interfaced to the AVR8 soft-processor. That way, a developer can use a higher level environment like avr-gcc, BASCOM, or even an Arduino sketch to design a user interface that can might be used in turn to control additional high speed application-specific functionality within the other cores or logic that is simultaneously running in parallel on the same FPGA chip. Step 5: Click to the right of Programmer in the Options window and select External programmer from the drop down list.

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It is easy to learn and use an d is very inexpensive. As you go through the tutorial, you can navigate back and forth with the toolbar on the left of your screen or with the back an d forward buttons on the bottom of the page. At the end of the tutorial, there is a link to open a printable version of this tutorial. If you have any suggestions on improving this or other tutorials, would like to see another added or even have one ready that y ou would like to add to the site, send the webmaster an email with the description and, if applicable, a copy of the tutorial you wish to submit. There is no fee for submitting a tutorial nor is there a fee paid to the submitter.

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Tutorial: How to use the BASCOM-AVR IDE and the Papilio One to run BASIC programs on an FPGA

This product description is updated in But we do not change it each time we update the software. And many other functions, statements and directives. This is a screen shot of the editor. You can work in normal mode or project mode.

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