From 368f4dcca9f8fdadfee527345b59f7a7ba6d6367 Mon Sep 17 00:00:00 2001 From: cnlohr Date: Sat, 3 Dec 2016 21:16:13 -0500 Subject: Update tools encode a 2.5 MHz signal with the AVR. --- tools/avr_codegen/test.lst | 444 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 444 insertions(+) create mode 100644 tools/avr_codegen/test.lst (limited to 'tools/avr_codegen/test.lst') diff --git a/tools/avr_codegen/test.lst b/tools/avr_codegen/test.lst new file mode 100644 index 0000000..69e5020 --- /dev/null +++ b/tools/avr_codegen/test.lst @@ -0,0 +1,444 @@ +GAS LISTING /tmp/ccWx46oe.s page 1 + + + 1 .file "test.c" + 2 __SP_H__ = 0x3e + 3 __SP_L__ = 0x3d + 4 __SREG__ = 0x3f + 5 __tmp_reg__ = 0 + 6 __zero_reg__ = 1 + 9 .text + 10 .Ltext0: + 104 .global delay_ms + 106 delay_ms: + 107 .stabd 46,0,0 + 1:test.c **** #include + 2:test.c **** #include + 3:test.c **** #include + 4:test.c **** #include + 5:test.c **** + 6:test.c **** void delay_ms(uint32_t time) { + 109 .LM0: + 110 .LFBB1: + 111 0000 0F93 push r16 + 112 0002 1F93 push r17 + 113 /* prologue: function */ + 114 /* frame size = 0 */ + 115 /* stack size = 2 */ + 116 .L__stack_usage = 2 + 7:test.c **** uint32_t i; + 8:test.c **** for (i = 0; i < time; i++) { + 118 .LM1: + 119 0004 00E0 ldi r16,0 + 120 0006 10E0 ldi r17,0 + 121 0008 9801 movw r18,r16 + 122 .L2: + 124 .LM2: + 125 000a 0617 cp r16,r22 + 126 000c 1707 cpc r17,r23 + 127 000e 2807 cpc r18,r24 + 128 0010 3907 cpc r19,r25 + 129 0012 01F0 breq .L5 + 130 .LBB6: + 131 .LBB7: + 133 .Ltext1: + 1:/usr/lib/avr/include/util/delay.h **** /* Copyright (c) 2002, Marek Michalkiewicz + 2:/usr/lib/avr/include/util/delay.h **** Copyright (c) 2004,2005,2007 Joerg Wunsch + 3:/usr/lib/avr/include/util/delay.h **** Copyright (c) 2007 Florin-Viorel Petrov + 4:/usr/lib/avr/include/util/delay.h **** All rights reserved. + 5:/usr/lib/avr/include/util/delay.h **** + 6:/usr/lib/avr/include/util/delay.h **** Redistribution and use in source and binary forms, with or without + 7:/usr/lib/avr/include/util/delay.h **** modification, are permitted provided that the following conditions are met: + 8:/usr/lib/avr/include/util/delay.h **** + 9:/usr/lib/avr/include/util/delay.h **** * Redistributions of source code must retain the above copyright + 10:/usr/lib/avr/include/util/delay.h **** notice, this list of conditions and the following disclaimer. + 11:/usr/lib/avr/include/util/delay.h **** + 12:/usr/lib/avr/include/util/delay.h **** * Redistributions in binary form must reproduce the above copyright + 13:/usr/lib/avr/include/util/delay.h **** notice, this list of conditions and the following disclaimer in + 14:/usr/lib/avr/include/util/delay.h **** the documentation and/or other materials provided with the + 15:/usr/lib/avr/include/util/delay.h **** distribution. + 16:/usr/lib/avr/include/util/delay.h **** + GAS LISTING /tmp/ccWx46oe.s page 2 + + + 17:/usr/lib/avr/include/util/delay.h **** * Neither the name of the copyright holders nor the names of + 18:/usr/lib/avr/include/util/delay.h **** contributors may be used to endorse or promote products derived + 19:/usr/lib/avr/include/util/delay.h **** from this software without specific prior written permission. + 20:/usr/lib/avr/include/util/delay.h **** + 21:/usr/lib/avr/include/util/delay.h **** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + 22:/usr/lib/avr/include/util/delay.h **** AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + 23:/usr/lib/avr/include/util/delay.h **** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + 24:/usr/lib/avr/include/util/delay.h **** ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + 25:/usr/lib/avr/include/util/delay.h **** LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + 26:/usr/lib/avr/include/util/delay.h **** CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + 27:/usr/lib/avr/include/util/delay.h **** SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + 28:/usr/lib/avr/include/util/delay.h **** INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + 29:/usr/lib/avr/include/util/delay.h **** CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + 30:/usr/lib/avr/include/util/delay.h **** ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + 31:/usr/lib/avr/include/util/delay.h **** POSSIBILITY OF SUCH DAMAGE. */ + 32:/usr/lib/avr/include/util/delay.h **** + 33:/usr/lib/avr/include/util/delay.h **** /* $Id$ */ + 34:/usr/lib/avr/include/util/delay.h **** + 35:/usr/lib/avr/include/util/delay.h **** #ifndef _UTIL_DELAY_H_ + 36:/usr/lib/avr/include/util/delay.h **** #define _UTIL_DELAY_H_ 1 + 37:/usr/lib/avr/include/util/delay.h **** + 38:/usr/lib/avr/include/util/delay.h **** #ifndef __HAS_DELAY_CYCLES + 39:/usr/lib/avr/include/util/delay.h **** #define __HAS_DELAY_CYCLES 1 + 40:/usr/lib/avr/include/util/delay.h **** #endif + 41:/usr/lib/avr/include/util/delay.h **** + 42:/usr/lib/avr/include/util/delay.h **** #include + 43:/usr/lib/avr/include/util/delay.h **** #include + 44:/usr/lib/avr/include/util/delay.h **** #include + 45:/usr/lib/avr/include/util/delay.h **** + 46:/usr/lib/avr/include/util/delay.h **** /** \file */ + 47:/usr/lib/avr/include/util/delay.h **** /** \defgroup util_delay : Convenience functions for busy-wait delay loops + 48:/usr/lib/avr/include/util/delay.h **** \code + 49:/usr/lib/avr/include/util/delay.h **** #define F_CPU 1000000UL // 1 MHz + 50:/usr/lib/avr/include/util/delay.h **** //#define F_CPU 14.7456E6 + 51:/usr/lib/avr/include/util/delay.h **** #include + 52:/usr/lib/avr/include/util/delay.h **** \endcode + 53:/usr/lib/avr/include/util/delay.h **** + 54:/usr/lib/avr/include/util/delay.h **** \note As an alternative method, it is possible to pass the + 55:/usr/lib/avr/include/util/delay.h **** F_CPU macro down to the compiler from the Makefile. + 56:/usr/lib/avr/include/util/delay.h **** Obviously, in that case, no \c \#define statement should be + 57:/usr/lib/avr/include/util/delay.h **** used. + 58:/usr/lib/avr/include/util/delay.h **** + 59:/usr/lib/avr/include/util/delay.h **** The functions in this header file are wrappers around the basic + 60:/usr/lib/avr/include/util/delay.h **** busy-wait functions from . They are meant as + 61:/usr/lib/avr/include/util/delay.h **** convenience functions where actual time values can be specified + 62:/usr/lib/avr/include/util/delay.h **** rather than a number of cycles to wait for. The idea behind is + 63:/usr/lib/avr/include/util/delay.h **** that compile-time constant expressions will be eliminated by + 64:/usr/lib/avr/include/util/delay.h **** compiler optimization so floating-point expressions can be used + 65:/usr/lib/avr/include/util/delay.h **** to calculate the number of delay cycles needed based on the CPU + 66:/usr/lib/avr/include/util/delay.h **** frequency passed by the macro F_CPU. + 67:/usr/lib/avr/include/util/delay.h **** + 68:/usr/lib/avr/include/util/delay.h **** \note In order for these functions to work as intended, compiler + 69:/usr/lib/avr/include/util/delay.h **** optimizations must be enabled, and the delay time + 70:/usr/lib/avr/include/util/delay.h **** must be an expression that is a known constant at + 71:/usr/lib/avr/include/util/delay.h **** compile-time. If these requirements are not met, the resulting + 72:/usr/lib/avr/include/util/delay.h **** delay will be much longer (and basically unpredictable), and + 73:/usr/lib/avr/include/util/delay.h **** applications that otherwise do not use floating-point calculations + GAS LISTING /tmp/ccWx46oe.s page 3 + + + 74:/usr/lib/avr/include/util/delay.h **** will experience severe code bloat by the floating-point library + 75:/usr/lib/avr/include/util/delay.h **** routines linked into the application. + 76:/usr/lib/avr/include/util/delay.h **** + 77:/usr/lib/avr/include/util/delay.h **** The functions available allow the specification of microsecond, and + 78:/usr/lib/avr/include/util/delay.h **** millisecond delays directly, using the application-supplied macro + 79:/usr/lib/avr/include/util/delay.h **** F_CPU as the CPU clock frequency (in Hertz). + 80:/usr/lib/avr/include/util/delay.h **** + 81:/usr/lib/avr/include/util/delay.h **** */ + 82:/usr/lib/avr/include/util/delay.h **** + 83:/usr/lib/avr/include/util/delay.h **** #if !defined(__DOXYGEN__) + 84:/usr/lib/avr/include/util/delay.h **** static inline void _delay_us(double __us) __attribute__((always_inline)); + 85:/usr/lib/avr/include/util/delay.h **** static inline void _delay_ms(double __ms) __attribute__((always_inline)); + 86:/usr/lib/avr/include/util/delay.h **** #endif + 87:/usr/lib/avr/include/util/delay.h **** + 88:/usr/lib/avr/include/util/delay.h **** #ifndef F_CPU + 89:/usr/lib/avr/include/util/delay.h **** /* prevent compiler error by supplying a default */ + 90:/usr/lib/avr/include/util/delay.h **** # warning "F_CPU not defined for " + 91:/usr/lib/avr/include/util/delay.h **** # define F_CPU 1000000UL + 92:/usr/lib/avr/include/util/delay.h **** #endif + 93:/usr/lib/avr/include/util/delay.h **** + 94:/usr/lib/avr/include/util/delay.h **** #ifndef __OPTIMIZE__ + 95:/usr/lib/avr/include/util/delay.h **** # warning "Compiler optimizations disabled; functions from won't work as designed" + 96:/usr/lib/avr/include/util/delay.h **** #endif + 97:/usr/lib/avr/include/util/delay.h **** + 98:/usr/lib/avr/include/util/delay.h **** #if __HAS_DELAY_CYCLES && defined(__OPTIMIZE__) && \ + 99:/usr/lib/avr/include/util/delay.h **** !defined(__DELAY_BACKWARD_COMPATIBLE__) && \ + 100:/usr/lib/avr/include/util/delay.h **** __STDC_HOSTED__ + 101:/usr/lib/avr/include/util/delay.h **** # include + 102:/usr/lib/avr/include/util/delay.h **** #endif + 103:/usr/lib/avr/include/util/delay.h **** + 104:/usr/lib/avr/include/util/delay.h **** /** + 105:/usr/lib/avr/include/util/delay.h **** \ingroup util_delay + 106:/usr/lib/avr/include/util/delay.h **** + 107:/usr/lib/avr/include/util/delay.h **** Perform a delay of \c __ms milliseconds, using _delay_loop_2(). + 108:/usr/lib/avr/include/util/delay.h **** + 109:/usr/lib/avr/include/util/delay.h **** The macro F_CPU is supposed to be defined to a + 110:/usr/lib/avr/include/util/delay.h **** constant defining the CPU clock frequency (in Hertz). + 111:/usr/lib/avr/include/util/delay.h **** + 112:/usr/lib/avr/include/util/delay.h **** The maximal possible delay is 262.14 ms / F_CPU in MHz. + 113:/usr/lib/avr/include/util/delay.h **** + 114:/usr/lib/avr/include/util/delay.h **** When the user request delay which exceed the maximum possible one, + 115:/usr/lib/avr/include/util/delay.h **** _delay_ms() provides a decreased resolution functionality. In this + 116:/usr/lib/avr/include/util/delay.h **** mode _delay_ms() will work with a resolution of 1/10 ms, providing + 117:/usr/lib/avr/include/util/delay.h **** delays up to 6.5535 seconds (independent from CPU frequency). The + 118:/usr/lib/avr/include/util/delay.h **** user will not be informed about decreased resolution. + 119:/usr/lib/avr/include/util/delay.h **** + 120:/usr/lib/avr/include/util/delay.h **** If the avr-gcc toolchain has __builtin_avr_delay_cycles(unsigned long) + 121:/usr/lib/avr/include/util/delay.h **** support, maximal possible delay is 4294967.295 ms/ F_CPU in MHz. For + 122:/usr/lib/avr/include/util/delay.h **** values greater than the maximal possible delay, overflows results in + 123:/usr/lib/avr/include/util/delay.h **** no delay i.e., 0ms. + 124:/usr/lib/avr/include/util/delay.h **** + 125:/usr/lib/avr/include/util/delay.h **** Conversion of __us into clock cycles may not always result in integer. + 126:/usr/lib/avr/include/util/delay.h **** By default, the clock cycles rounded up to next integer. This ensures that + 127:/usr/lib/avr/include/util/delay.h **** the user gets atleast __us microseconds of delay. + 128:/usr/lib/avr/include/util/delay.h **** + 129:/usr/lib/avr/include/util/delay.h **** Alternatively, user can define __DELAY_ROUND_DOWN__ and __DELAY_ROUND_CLOSEST__ + 130:/usr/lib/avr/include/util/delay.h **** to round down and round to closest integer. + GAS LISTING /tmp/ccWx46oe.s page 4 + + + 131:/usr/lib/avr/include/util/delay.h **** + 132:/usr/lib/avr/include/util/delay.h **** Note: The new implementation of _delay_ms(double __ms) with + 133:/usr/lib/avr/include/util/delay.h **** __builtin_avr_delay_cycles(unsigned long) support is not backward compatible. + 134:/usr/lib/avr/include/util/delay.h **** User can define __DELAY_BACKWARD_COMPATIBLE__ to get a backward compatible delay. + 135:/usr/lib/avr/include/util/delay.h **** Also, the backward compatible + 136:/usr/lib/avr/include/util/delay.h **** algorithm will be chosen if the code is compiled in a freestanding + 137:/usr/lib/avr/include/util/delay.h **** environment (GCC option \c -ffreestanding), as the math functions + 138:/usr/lib/avr/include/util/delay.h **** required for rounding are not available to the compiler then. + 139:/usr/lib/avr/include/util/delay.h **** + 140:/usr/lib/avr/include/util/delay.h **** */ + 141:/usr/lib/avr/include/util/delay.h **** void + 142:/usr/lib/avr/include/util/delay.h **** _delay_ms(double __ms) + 143:/usr/lib/avr/include/util/delay.h **** { + 144:/usr/lib/avr/include/util/delay.h **** double __tmp ; + 145:/usr/lib/avr/include/util/delay.h **** #if __HAS_DELAY_CYCLES && defined(__OPTIMIZE__) && \ + 146:/usr/lib/avr/include/util/delay.h **** !defined(__DELAY_BACKWARD_COMPATIBLE__) && \ + 147:/usr/lib/avr/include/util/delay.h **** __STDC_HOSTED__ + 148:/usr/lib/avr/include/util/delay.h **** uint32_t __ticks_dc; + 149:/usr/lib/avr/include/util/delay.h **** extern void __builtin_avr_delay_cycles(unsigned long); + 150:/usr/lib/avr/include/util/delay.h **** __tmp = ((F_CPU) / 1e3) * __ms; + 151:/usr/lib/avr/include/util/delay.h **** + 152:/usr/lib/avr/include/util/delay.h **** #if defined(__DELAY_ROUND_DOWN__) + 153:/usr/lib/avr/include/util/delay.h **** __ticks_dc = (uint32_t)fabs(__tmp); + 154:/usr/lib/avr/include/util/delay.h **** + 155:/usr/lib/avr/include/util/delay.h **** #elif defined(__DELAY_ROUND_CLOSEST__) + 156:/usr/lib/avr/include/util/delay.h **** __ticks_dc = (uint32_t)(fabs(__tmp)+0.5); + 157:/usr/lib/avr/include/util/delay.h **** + 158:/usr/lib/avr/include/util/delay.h **** #else + 159:/usr/lib/avr/include/util/delay.h **** //round up by default + 160:/usr/lib/avr/include/util/delay.h **** __ticks_dc = (uint32_t)(ceil(fabs(__tmp))); + 161:/usr/lib/avr/include/util/delay.h **** #endif + 162:/usr/lib/avr/include/util/delay.h **** + 163:/usr/lib/avr/include/util/delay.h **** __builtin_avr_delay_cycles(__ticks_dc); + 135 .LM3: + 136 0014 EFEC ldi r30,lo8(1999) + 137 0016 F7E0 ldi r31,hi8(1999) + 138 0018 3197 1: sbiw r30,1 + 139 001a 01F4 brne 1b + 140 001c 00C0 rjmp . + 141 001e 0000 nop + 142 .LBE7: + 143 .LBE6: + 145 .Ltext2: + 147 .LM4: + 148 0020 0F5F subi r16,-1 + 149 0022 1F4F sbci r17,-1 + 150 0024 2F4F sbci r18,-1 + 151 0026 3F4F sbci r19,-1 + 152 0028 00C0 rjmp .L2 + 153 .L5: + 154 /* epilogue start */ + 9:test.c **** _delay_ms(1); + 10:test.c **** } + 11:test.c **** } + 156 .LM5: + 157 002a 1F91 pop r17 + 158 002c 0F91 pop r16 + GAS LISTING /tmp/ccWx46oe.s page 5 + + + 159 002e 0895 ret + 164 .Lscope1: + 166 .stabd 78,0,0 + 167 .section .text.startup,"ax",@progbits + 169 .global main + 171 main: + 172 .stabd 46,0,0 + 12:test.c **** + 13:test.c **** #define NOOP asm volatile("nop" ::) + 14:test.c **** + 15:test.c **** + 16:test.c **** static void setup_clock( void ) + 17:test.c **** { + 18:test.c **** /*Examine Page 33*/ + 19:test.c **** + 20:test.c **** CLKPR = 0x80; /*Setup CLKPCE to be receptive*/ + 21:test.c **** CLKPR = 0x00; /*No scalar*/ + 22:test.c **** OSCCAL = 0x80; //B8 is bottom E8 is top. + 23:test.c **** } + 24:test.c **** + 25:test.c **** int main( ) + 26:test.c **** { + 174 .LM6: + 175 .LFBB2: + 176 /* prologue: function */ + 177 /* frame size = 0 */ + 178 /* stack size = 0 */ + 179 .L__stack_usage = 0 + 27:test.c **** cli(); + 181 .LM7: + 182 /* #APP */ + 183 ; 27 "test.c" 1 + 184 0000 F894 cli + 185 ; 0 "" 2 + 186 /* #NOAPP */ + 187 .LBB12: + 188 .LBB13: + 20:test.c **** CLKPR = 0x00; /*No scalar*/ + 190 .LM8: + 191 0002 80E8 ldi r24,lo8(-128) + 192 0004 86BD out 0x26,r24 + 21:test.c **** OSCCAL = 0x80; //B8 is bottom E8 is top. + 194 .LM9: + 195 0006 16BC out 0x26,__zero_reg__ + 22:test.c **** } + 197 .LM10: + 198 0008 81BF out 0x31,r24 + 199 .LBE13: + 200 .LBE12: + 28:test.c **** setup_clock(); + 29:test.c **** DDRB = _BV(4); + 202 .LM11: + 203 000a 80E1 ldi r24,lo8(16) + 204 000c 87BB out 0x17,r24 + 30:test.c **** uint8_t marker; + 31:test.c **** + 32:test.c **** while(1) + GAS LISTING /tmp/ccWx46oe.s page 6 + + + 33:test.c **** { + 34:test.c **** marker = 0x05; + 35:test.c **** do{ + 36:test.c **** PORTB = _BV(4); + 206 .LM12: + 207 000e 90E1 ldi r25,lo8(16) + 208 .L8: + 26:test.c **** cli(); + 210 .LM13: + 211 0010 85E0 ldi r24,lo8(5) + 212 .L7: + 214 .LM14: + 215 0012 98BB out 0x18,r25 + 37:test.c **** marker--; + 38:test.c **** PORTB = 0; + 217 .LM15: + 218 0014 18BA out 0x18,__zero_reg__ + 219 0016 8150 subi r24,lo8(-(-1)) + 39:test.c **** } while( marker ); + 221 .LM16: + 222 0018 01F4 brne .L7 + 223 .LBB14: + 224 .LBB15: + 226 .Ltext3: + 164:/usr/lib/avr/include/util/delay.h **** + 165:/usr/lib/avr/include/util/delay.h **** #else + 166:/usr/lib/avr/include/util/delay.h **** uint16_t __ticks; + 167:/usr/lib/avr/include/util/delay.h **** __tmp = ((F_CPU) / 4e3) * __ms; + 168:/usr/lib/avr/include/util/delay.h **** if (__tmp < 1.0) + 169:/usr/lib/avr/include/util/delay.h **** __ticks = 1; + 170:/usr/lib/avr/include/util/delay.h **** else if (__tmp > 65535) + 171:/usr/lib/avr/include/util/delay.h **** { + 172:/usr/lib/avr/include/util/delay.h **** // __ticks = requested delay in 1/10 ms + 173:/usr/lib/avr/include/util/delay.h **** __ticks = (uint16_t) (__ms * 10.0); + 174:/usr/lib/avr/include/util/delay.h **** while(__ticks) + 175:/usr/lib/avr/include/util/delay.h **** { + 176:/usr/lib/avr/include/util/delay.h **** // wait 1/10 ms + 177:/usr/lib/avr/include/util/delay.h **** _delay_loop_2(((F_CPU) / 4e3) / 10); + 178:/usr/lib/avr/include/util/delay.h **** __ticks --; + 179:/usr/lib/avr/include/util/delay.h **** } + 180:/usr/lib/avr/include/util/delay.h **** return; + 181:/usr/lib/avr/include/util/delay.h **** } + 182:/usr/lib/avr/include/util/delay.h **** else + 183:/usr/lib/avr/include/util/delay.h **** __ticks = (uint16_t)__tmp; + 184:/usr/lib/avr/include/util/delay.h **** _delay_loop_2(__ticks); + 185:/usr/lib/avr/include/util/delay.h **** #endif + 186:/usr/lib/avr/include/util/delay.h **** } + 187:/usr/lib/avr/include/util/delay.h **** + 188:/usr/lib/avr/include/util/delay.h **** /** + 189:/usr/lib/avr/include/util/delay.h **** \ingroup util_delay + 190:/usr/lib/avr/include/util/delay.h **** + 191:/usr/lib/avr/include/util/delay.h **** Perform a delay of \c __us microseconds, using _delay_loop_1(). + 192:/usr/lib/avr/include/util/delay.h **** + 193:/usr/lib/avr/include/util/delay.h **** The macro F_CPU is supposed to be defined to a + 194:/usr/lib/avr/include/util/delay.h **** constant defining the CPU clock frequency (in Hertz). + 195:/usr/lib/avr/include/util/delay.h **** + 196:/usr/lib/avr/include/util/delay.h **** The maximal possible delay is 768 us / F_CPU in MHz. + GAS LISTING /tmp/ccWx46oe.s page 7 + + + 197:/usr/lib/avr/include/util/delay.h **** + 198:/usr/lib/avr/include/util/delay.h **** If the user requests a delay greater than the maximal possible one, + 199:/usr/lib/avr/include/util/delay.h **** _delay_us() will automatically call _delay_ms() instead. The user + 200:/usr/lib/avr/include/util/delay.h **** will not be informed about this case. + 201:/usr/lib/avr/include/util/delay.h **** + 202:/usr/lib/avr/include/util/delay.h **** If the avr-gcc toolchain has __builtin_avr_delay_cycles(unsigned long) + 203:/usr/lib/avr/include/util/delay.h **** support, maximal possible delay is 4294967.295 us/ F_CPU in MHz. For + 204:/usr/lib/avr/include/util/delay.h **** values greater than the maximal possible delay, overflow results in + 205:/usr/lib/avr/include/util/delay.h **** no delay i.e., 0us. + 206:/usr/lib/avr/include/util/delay.h **** + 207:/usr/lib/avr/include/util/delay.h **** Conversion of __us into clock cycles may not always result in integer. + 208:/usr/lib/avr/include/util/delay.h **** By default, the clock cycles rounded up to next integer. This ensures that + 209:/usr/lib/avr/include/util/delay.h **** the user gets atleast __us microseconds of delay. + 210:/usr/lib/avr/include/util/delay.h **** + 211:/usr/lib/avr/include/util/delay.h **** Alternatively, user can define __DELAY_ROUND_DOWN__ and __DELAY_ROUND_CLOSEST__ + 212:/usr/lib/avr/include/util/delay.h **** to round down and round to closest integer. + 213:/usr/lib/avr/include/util/delay.h **** + 214:/usr/lib/avr/include/util/delay.h **** Note: The new implementation of _delay_us(double __us) with + 215:/usr/lib/avr/include/util/delay.h **** __builtin_avr_delay_cycles(unsigned long) support is not backward compatible. + 216:/usr/lib/avr/include/util/delay.h **** User can define __DELAY_BACKWARD_COMPATIBLE__ to get a backward compatible delay. + 217:/usr/lib/avr/include/util/delay.h **** Also, the backward compatible + 218:/usr/lib/avr/include/util/delay.h **** algorithm will be chosen if the code is compiled in a freestanding + 219:/usr/lib/avr/include/util/delay.h **** environment (GCC option \c -ffreestanding), as the math functions + 220:/usr/lib/avr/include/util/delay.h **** required for rounding are not available to the compiler then. + 221:/usr/lib/avr/include/util/delay.h **** + 222:/usr/lib/avr/include/util/delay.h **** */ + 223:/usr/lib/avr/include/util/delay.h **** void + 224:/usr/lib/avr/include/util/delay.h **** _delay_us(double __us) + 225:/usr/lib/avr/include/util/delay.h **** { + 226:/usr/lib/avr/include/util/delay.h **** double __tmp ; + 227:/usr/lib/avr/include/util/delay.h **** #if __HAS_DELAY_CYCLES && defined(__OPTIMIZE__) && \ + 228:/usr/lib/avr/include/util/delay.h **** !defined(__DELAY_BACKWARD_COMPATIBLE__) && \ + 229:/usr/lib/avr/include/util/delay.h **** __STDC_HOSTED__ + 230:/usr/lib/avr/include/util/delay.h **** uint32_t __ticks_dc; + 231:/usr/lib/avr/include/util/delay.h **** extern void __builtin_avr_delay_cycles(unsigned long); + 232:/usr/lib/avr/include/util/delay.h **** __tmp = ((F_CPU) / 1e6) * __us; + 233:/usr/lib/avr/include/util/delay.h **** + 234:/usr/lib/avr/include/util/delay.h **** #if defined(__DELAY_ROUND_DOWN__) + 235:/usr/lib/avr/include/util/delay.h **** __ticks_dc = (uint32_t)fabs(__tmp); + 236:/usr/lib/avr/include/util/delay.h **** + 237:/usr/lib/avr/include/util/delay.h **** #elif defined(__DELAY_ROUND_CLOSEST__) + 238:/usr/lib/avr/include/util/delay.h **** __ticks_dc = (uint32_t)(fabs(__tmp)+0.5); + 239:/usr/lib/avr/include/util/delay.h **** + 240:/usr/lib/avr/include/util/delay.h **** #else + 241:/usr/lib/avr/include/util/delay.h **** //round up by default + 242:/usr/lib/avr/include/util/delay.h **** __ticks_dc = (uint32_t)(ceil(fabs(__tmp))); + 243:/usr/lib/avr/include/util/delay.h **** #endif + 244:/usr/lib/avr/include/util/delay.h **** + 245:/usr/lib/avr/include/util/delay.h **** __builtin_avr_delay_cycles(__ticks_dc); + 228 .LM17: + 229 001a E3E3 ldi r30,lo8(-32205) + 230 001c F2E8 ldi r31,hi8(-32205) + 231 001e 3197 1: sbiw r30,1 + 232 0020 01F4 brne 1b + 233 0022 00C0 rjmp . + 234 0024 0000 nop + 235 0026 00C0 rjmp .L8 + GAS LISTING /tmp/ccWx46oe.s page 8 + + + 236 .LBE15: + 237 .LBE14: + 239 .Lscope2: + 241 .stabd 78,0,0 + 242 .text + 244 .Letext0: + 245 .ident "GCC: (GNU) 4.9.2" + GAS LISTING /tmp/ccWx46oe.s page 9 + + +DEFINED SYMBOLS + *ABS*:0000000000000000 test.c + /tmp/ccWx46oe.s:2 *ABS*:000000000000003e __SP_H__ + /tmp/ccWx46oe.s:3 *ABS*:000000000000003d __SP_L__ + /tmp/ccWx46oe.s:4 *ABS*:000000000000003f __SREG__ + /tmp/ccWx46oe.s:5 *ABS*:0000000000000000 __tmp_reg__ + /tmp/ccWx46oe.s:6 *ABS*:0000000000000001 __zero_reg__ + /tmp/ccWx46oe.s:106 .text:0000000000000000 delay_ms + /tmp/ccWx46oe.s:171 .text.startup:0000000000000000 main + +NO UNDEFINED SYMBOLS -- cgit v1.2.3