User manual

Tutorial

4.15.1.2 MPLAB IDE SETUP

To set up MPLAB IDE software to use SPI Trace, do the following:

1. Launch MPLAB IDE and open the project from this tutorial, if it is not already

open.

2. If the MPLAB REAL ICE in-circuit emulator is selected as the programmer, dis-

able it by selecting Programmer>Select Programmer>None

3. Enable the MPLAB REAL ICE in-circuit emulator as the debug tool by selecting

Debugger>Select Tool>REAL ICE

4. On the Project toolbar, select “Debug” from the Build Configuration drop-down

list. (For some devices, an i version of the linker script is also necessary for

debugging, e.g., 18F8722i.lkr.)

4.15.1.3 TRACE SETUP

To log a variable value using SPI Trace:

1. Select Project>Build Options>Project

, Trace tab. Check “Enable Trace” and

uncheck “Disable Trace Macros”. Then select the SPI Trace and choose an SPI

port from the drop-down list. Click OK.

FIGURE 4-22: BUILD OPTIONS DIALOG – SPI TRACE

2. Highlight the variable counter from the following line of code:

counter++; //increment counter

Right click on the highlighted variable and select “Log Selected C Value” from the

pop-up menu. This causes the following macro line to be inserted above the line

containing the variable:

__LOG(id,counter);

where id is a log number auto-generated during build.

3. Rebuild the project (Project>Build All