Mercurial > louis > kiibohd-controller

annotate Lib/delay.h @ 308:ab4515606277

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Fix whitespace Use a consistent standard - Tabs in front for indenting, spaces after for anything else. This way everything stays nice and lined up while also letting users change there prefered indent level. Most of the new files from Haata where already in this format.
author Rowan Decker <Smasher816@gmail.com>
date Sun, 08 Mar 2015 18:40:01 -0700
parents 6ac92b8614c0
children 772f9bea482b
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1 /* Teensyduino Core Library
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2 * http://www.pjrc.com/teensy/
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3 * Copyright (c) 2013 PJRC.COM, LLC.
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4 * Modifications by Jacob Alexander 2013-2014
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5 *
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6 * Permission is hereby granted, free of charge, to any person obtaining
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7 * a copy of this software and associated documentation files (the
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8 * "Software"), to deal in the Software without restriction, including
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9 * without limitation the rights to use, copy, modify, merge, publish,
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10 * distribute, sublicense, and/or sell copies of the Software, and to
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11 * permit persons to whom the Software is furnished to do so, subject to
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12 * the following conditions:
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13 *
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14 * 1. The above copyright notice and this permission notice shall be
6ac92b8614c0 Fixing RAM calculator and reduced actual SRAM usage
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15 * included in all copies or substantial portions of the Software.
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16 *
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17 * 2. If the Software is incorporated into a build system that allows
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18 * selection among a list of target devices, then similar target
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19 * devices manufactured by PJRC.COM must be included in the list of
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20 * target devices and selectable in the same manner.
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21 *
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22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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23 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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24 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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25 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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26 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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27 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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28 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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29 * SOFTWARE.
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30 */
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32 #ifndef __DELAY_H
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33 #define __DELAY_H
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34
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35 // ----- System Includes -----
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36
70
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37 #include <stdint.h>
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40
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41 // ----- Macros -----
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42
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43 // Convenience Macros, for delay compatibility with AVR-GCC
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44 #define _delay_ms(val) delay( val )
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45 #define _delay_us(val) delayMicroseconds( val )
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49 // ----- Functions -----
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50
70
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51 // the systick interrupt is supposed to increment this at 1 kHz rate
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52 extern volatile uint32_t systick_millis_count;
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54 static inline uint32_t millis(void) __attribute__((always_inline, unused));
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55 static inline uint32_t millis(void)
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56 {
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57 return systick_millis_count; // single aligned 32 bit is atomic;
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58 }
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59
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61 static inline void delayMicroseconds(uint32_t) __attribute__((always_inline, unused));
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62 static inline void delayMicroseconds(uint32_t usec)
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63 {
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64 #if F_CPU == 96000000
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65 uint32_t n = usec << 5;
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66 #elif F_CPU == 48000000
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67 uint32_t n = usec << 4;
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68 #elif F_CPU == 24000000
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69 uint32_t n = usec << 3;
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70 #endif
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71 asm volatile(
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72 "L_%=_delayMicroseconds:" "\n\t"
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73 "subs %0, #1" "\n\t"
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74 "bne L_%=_delayMicroseconds" "\n"
70
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75 : "+r" (n) :
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76 );
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77 }
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78
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79
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80 void yield(void) __attribute__ ((weak));
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81
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82 uint32_t micros(void);
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83
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84 void delay(uint32_t ms);
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85
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86 #endif
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87