1: Add header file in IAR settings
When programming in IAR, you often use your own header files. At this time, you need to set the path to add the included header files. The common method is to right-click on the project and select options, and load your header file path in the preprocessor in the c/c++ compiler settings. $PROJ_DIR$ means that the path of the included file is in the project file, in the same directory as the eww file, that is, search from the current project directory.
In the figure, $PROJ_DIR$\Headfile means that the header file is contained in the Headfile directory at the next level of the path where the current project file is located (Headfile is a newly created folder).
two,
When I opened a separate c file for all interrupt functions, the following problems occurred when the global variables defined in other files were used in the interrupt function:
Error[e46]: Undefined external "?cstart_init_zero" referred in Fun ( D:\WaterMeter Program\DISPLY_20140220\Debug\Obj\Fun.r43 ) as shown in the following figure:
The specific problems found are:
Solution to the problem: As shown in the figure: right-click the project file and select option. Select library in the library Configuration tab in general option. Normal DLIB is as shown in the figure:
problem solved.
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