avr/avrlibc162.h

   1 /*
   2  * Copyright (C) 2007 Anton Blad
   3  * Copyright (C) 2007 Fredrik Kuivinen
   4  * Copyright (C) 2007 Jakob Rosén
   5  *
   6  * This file is licensed under GPL v2.
   7  */
   8
   9 #ifndef AVRLIBC162_H
  10 #define AVRLIBC162_H
  11
  12 #include <avr/io.h>
  13
  14 /* avrlibc does not yet include complete support for at90usb162. The lacking
  15    functionality is defined in this file. */
  16
  17 #if __AVR_LIBC_VERSION__ < 10600ul
  18 typedef enum
  19 {
  20     clock_div_1 = 0,
  21     clock_div_2 = 1,
  22     clock_div_4 = 2,
  23     clock_div_8 = 3,
  24     clock_div_16 = 4,
  25     clock_div_32 = 5,
  26     clock_div_64 = 6,
  27     clock_div_128 = 7,
  28     clock_div_256 = 8
  29 } clock_div_t;
  30
  31 #define clock_prescale_set(x) \
  32 { \
  33         uint8_t tmp = _BV(CLKPCE); \
  34         __asm__ __volatile__ ( \
  35                 "in __tmp_reg__,__SREG__" "\n\t" \
  36                 "cli" "\n\t" \
  37                 "sts %1, %0" "\n\t" \
  38                 "sts %1, %2" "\n\t" \
  39                 "out __SREG__, __tmp_reg__" \
  40                 : /* no outputs */ \
  41                 : "d" (tmp), \
  42                   "M" (_SFR_MEM_ADDR(CLKPR)), \
  43                   "d" (x) \
  44                 : "r0"); \
  45 }
  46 #endif
  47
  48 #endif