DAC.rar_DAC

The DAC project is a program for the ADuC7028 using Analog Devices ADuC7028 Evaluation Board. It demonstrates the use of the on-board DAC for sine wave generation. Note 1: Changing between C files Note 2: Using the Simulator Note 1: ------- The 'DACsine' example uses the core clock. The 'DACSineClk' uses an approximation of the sine wave and can be varied. To view either example, only one of the C source files ('DACsine.c' or 'DACSineClk.c') can be included in the target at any one time. Instructions on how to switch between the two examples are as follows: * In the Project Workspace window, right click on the active source file in the 'C Source File' folder. * Select ' Options for 'NAME_OF_FILE.c' '. * Uncheck the 'Include in Target Build' box * Click OK. * To activate the other file, right click on it in the 'C Source File' folder in the Project Workspace window. * Select ' Options for 'NAME_OF_FILE.c' '. * Check the 'Include in Target Build' box * Click OK. * Compile and run as normal. Note 2: ------- For this Project, the simulator can be used to simulate the DAC output signal on pin 10 (DAC 1). This can be set up as follows: * On the toolbar, click the drop down arrow on the 'Select Target' box and choose one of the DAC Simulator targets if it is not already selected. * Run Debug Mode * Click on the Logic Analyzer icon in the Toolbar (Appears as black box with coloured lines). * When the Logic Analyzer window appears, click the 'setup' button. (Sometimes this may open automatically) * Click the 'New' icon at the top of the setup window. * Type 'DAC1' in the box to identify the output pin you wish to analyze. * Set Max Value to 3.3 * Close the setup window * Click the 'Run' button to run the Debugger. * Stop the Debugger running at a suitable point * The simulation output can be seen in the Logic Analyzer window. Initially, it may not be possible to view the wavefrom properly if the time scale is too big. Clicking the 'In' in the Zoom section of the toolbar will zoom in on the graph, allowing the signal to be viewed more clearly.