This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision | ||
how_to_mix_c_and_asm [2007/04/07 02:47] stryd_one Added form link for included ASM (not inline ASM) |
how_to_mix_c_and_asm [2008/09/29 12:27] (current) wackazong |
||
---|---|---|---|
Line 4: | Line 4: | ||
You might have to declare some additional variables, but the concept is quite straightforward. | You might have to declare some additional variables, but the concept is quite straightforward. | ||
+ | Do not forget to include the header file of your processor from the SDCC header files, or variables like PRODL will not be defined: e.g. #include <pic18f4685.h> | ||
<code c> | <code c> | ||
- | unsigned char Scale_7bit(unsigned char evnt2, unsigned char min, unsigned char max) | + | unsigned char Scale_7bit(unsigned char evnt2, unsigned char min, unsigned char max) { |
- | { | + | |
// scaled value is (<8-bit random> * ) >> 8 | // scaled value is (<8-bit random> * ) >> 8 | ||
PRODL = evnt2 << 1; // 8bit value | PRODL = evnt2 << 1; // 8bit value |