diff options
Diffstat (limited to 'firmware/fx2/lib/delay.c')
-rw-r--r-- | firmware/fx2/lib/delay.c | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/firmware/fx2/lib/delay.c b/firmware/fx2/lib/delay.c deleted file mode 100644 index 13cf0eec8..000000000 --- a/firmware/fx2/lib/delay.c +++ /dev/null @@ -1,76 +0,0 @@ -/* -*- c++ -*- */ -/* - * Copyright 2003 Free Software Foundation, Inc. - * - * This file is part of GNU Radio - * - * GNU Radio 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 3, or (at your option) - * any later version. - * - * GNU Radio 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 GNU Radio; see the file COPYING. If not, write to - * the Free Software Foundation, Inc., 51 Franklin Street, - * Boston, MA 02110-1301, USA. - */ - -/* - * Delay approximately 1 microsecond (including overhead in udelay). - */ -static void -udelay1 (void) _naked -{ - _asm ; lcall that got us here took 4 bus cycles - ret ; 4 bus cycles - _endasm; -} - -/* - * delay for approximately usecs microseconds - */ -void -udelay (unsigned char usecs) -{ - do { - udelay1 (); - } while (--usecs != 0); -} - - -/* - * Delay approximately 1 millisecond. - * We're running at 48 MHz, so we need 48,000 clock cycles. - * - * Note however, that each bus cycle takes 4 clock cycles (not obvious, - * but explains the factor of 4 problem below). - */ -static void -mdelay1 (void) _naked -{ - _asm - mov dptr,#(-1200 & 0xffff) -002$: - inc dptr ; 3 bus cycles - mov a, dpl ; 2 bus cycles - orl a, dph ; 2 bus cycles - jnz 002$ ; 3 bus cycles - - ret - _endasm; -} - -void -mdelay (unsigned int msecs) -{ - do { - mdelay1 (); - } while (--msecs != 0); -} - - |