diff options
Diffstat (limited to 'blink.c')
| -rw-r--r-- | blink.c | 59 |
1 files changed, 34 insertions, 25 deletions
@@ -1,13 +1,31 @@ +/* + * Copyright © 2008 Keith Packard <keithp@keithp.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ sfr at 0x80 P0; sfr at 0x90 P1; sfr at 0xA0 P2; +sfr at 0xC6 CLKCON; -#define PERCFG SFR(0xF1) -#define ADCCFG SFR(0xF2) -#define P0SEL SFR(0xF3) -#define P1SEL SFR(0xF4) -#define P2SEL SFR(0xF5) +sfr at 0xF1 PERCFG; +sfr at 0xF2 ADCCFG; +sfr at 0xF3 P0SEL; +sfr at 0xF4 P1SEL; +sfr at 0xF5 P2SEL; sfr at 0xFD P0DIR; sfr at 0xFE P1DIR; @@ -16,25 +34,22 @@ sfr at 0x8F P0INP; sfr at 0xF6 P1INP; sfr at 0xF7 P2INP; -#define P0IFG SFR(0x89) -#define P1IFG SFR(0x8A) -#define P2IFG SFR(0x8B) +sfr at 0x89 P0IFG; +sfr at 0x8A P1IFG; +sfr at 0x8B P2IFG; -#define nop() _asm \ - nop \ - _endasm; +#define nop() _asm nop _endasm; -#if 0 void -delay (int n) +delay (unsigned char n) { - int i, j, k; + unsigned char i = 0, j = 0; - for (k = 0; k < n; k++) { - for (j = 0; j < 50; j++) - for (i = 0; i < 1000; i++) + n <<= 1; + while (--n != 0) + while (--j != 0) + while (--i != 0) nop(); - } } void @@ -68,11 +83,9 @@ wordspace () { #define C charspace(); #define W wordspace(); -#endif - main () { -#if 0 + CLKCON = 0; /* Set p1_1 to output */ P1DIR = 0x02; P1INP = 0x00; @@ -84,8 +97,4 @@ main () ___ ___ _ _ _ C _ _ _ C /* 7s */ ___ ___ _ ___ C ___ ___ _ W /* qg */ } -#else - P1DIR = 0x02; - for (;;); -#endif } |