1 C Programming for Embedded Systems. Data RAM Pointer Types ...

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P. Klimo Sep 2010 Pre-Processor: #define HERE_WE_GO # ifdef HERE_WE_GO /* Do something */ #else static bank1 unsigned char fred; // fred allocated to bank 1 /* do something else */ #endif static bank3 unsigned char fred; // fred allocated to bank 3 Example of a Simple Source File: const int a = 66; int c = 23; int myFunc( const int x, int y){ static int count =0; int c; c = x + y + count++; // Define integer 66 in program ROM // Initialize 2 bytes in the general RAM // Define a function in the general RAM // Private variable placed in the general RAM // Automatic variable defined on the myFunc stack // Will increment count between calls return c; } void main(){ int b; // The main function executes after initialization // Automatic variable defined on main’s stack while(1){ b = myFunc(a, c); // Infinite Loop calls repeatedly calls myFunc } } 4
5 P. Klimo Sep 2010
Page 1 and 2: P. Klimo Sep 2010 C Programming for
Page 3: P. Klimo Sep 2010 Assessing Individ
Page 7 and 8: P. Klimo Sep 2010 Example: Driving
Page 9 and 10: P. Klimo Sep 2010 CODE /* File: 7Se

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