Hi, I have tried a little bit of programming in sdcc for pic before, but it never went too far, so treat me as a complete beginner. I have studied C programming many years ago, but almost never used it, so everything except the very general stuff is forgotten long time ago.
So: I'm trying to build a small application (tachometer with 4-digit 7-segment LED display) on PIC14 platform, pic16f648a in particular. I wrote some routines in gpasm, tested them, but few parts of the task seem unnecessary difficult to code in asm. So, I want to write main program in sdcc, which would use already existing asm routines. These articles were helpful: http://www.btinternet.com/~Peter.Onion/sdcc/sdcc-intro.html http://burningsmell.org/pic16f628/ In asm module, few routines are defined ar global: GLOBAL _DISPLAY, _DECODE And when used in C, compiler does not complain. extern void _DISPLAY(void); extern void _DECODE(void); main(){ _DECODE(); But I need to access a variable, defined in asm like this: GLOBAL disp_digits UDATA disp_digits res 5 What would be the correct way to define that variable in C? I tried this: extern unsigned char disp_digits[5]; main(){ disp_digits[0]="0"; disp_digits[1]="1"; disp_digits[2]="2"; disp_digits[3]="3"; But compiler complains: main_lcd_disp.c:37: error 47: indirections to different types assignment from type 'const-char [2] code' to type 'unsigned-char fixed' Can anybody explain this, or direct me to the correct article to read? -- KPL ------------------------------------------------------------------------------ vRanger cuts backup time in half-while increasing security. With the market-leading solution for virtual backup and recovery, you get blazing-fast, flexible, and affordable data protection. Download your free trial now. http://p.sf.net/sfu/quest-d2dcopy1 _______________________________________________ Sdcc-user mailing list Sdcc-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sdcc-user
