Hi, I have to transmit an unsigned long as four bytes, so I split them up and join them again, but with the folowing example code, I get overflow at long_counter>32767 - can any of you give me a clue how to do it right?
<http://code.google.com/p/kodak-timer/source/browse/ir_test/four_unsigned_char_to_unsigned_long.c> unsigned char i; unsigned long long_counter; unsigned char char_counter[4]; void main(void) { unsigned char len; unsigned char lcd_buf[16]; OSCCONbits.SCS = 0x0; // System Clock Select bits = External oscillator OSCCONbits.IRCF = 0x7; // Internal Oscillator Frequency Select bits 8 MHz (INTOSC drives clock directly) lcd_init(); while (1) { for (long_counter = 0; long_counter < 0xffff0000; long_counter += 50) { // split long_counter to four unsigned char's for (i = 0; i < 4; i++) { char_counter[i] = (long_counter & (0xff << (i * 8))) >> (i * 8); } // convert them to unsigned int again long_counter = char_counter[0] | (char_counter[1] << 8) | (char_counter[2] << 16) | (char_counter[3] << 24); sprintf(lcd_buf, "%lu", long_counter); debug(lcd_buf); } } } P.S. Compiling for pic18f2550 - kristoffer ek ------------------------------------------------------------------------------ WhatsUp Gold - Download Free Network Management Software The most intuitive, comprehensive, and cost-effective network management toolset available today. Delivers lowest initial acquisition cost and overall TCO of any competing solution. http://p.sf.net/sfu/whatsupgold-sd _______________________________________________ Sdcc-user mailing list Sdcc-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sdcc-user
