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Merge pull request #2495 from facchinm/test-pulseIn-pullreq2 

rework pulseIn function to solve issue #2409
This commit is contained in:
Martino Facchin 2015-05-29 15:38:22 +02:00
parent 5933a7e8d3 a7d81d0b1c
commit 3859fe680b
8 changed files with 460 additions and 60 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
hardware/arduino/avr/cores/arduino/Arduino.h
View File

@ -134,6 +134,7 @@ unsigned long micros(void);
void delay(unsigned long);
void delayMicroseconds(unsigned int us);
unsigned long pulseIn(uint8_t pin, uint8_t state, unsigned long timeout);
unsigned long pulseInLong(uint8_t pin, uint8_t state, unsigned long timeout);
void shiftOut(uint8_t dataPin, uint8_t clockPin, uint8_t bitOrder, uint8_t val);
uint8_t shiftIn(uint8_t dataPin, uint8_t clockPin, uint8_t bitOrder);
@ -232,6 +233,7 @@ uint16_t makeWord(byte h, byte l);
#define word(...) makeWord(__VA_ARGS__)
unsigned long pulseIn(uint8_t pin, uint8_t state, unsigned long timeout = 1000000L);
unsigned long pulseInLong(uint8_t pin, uint8_t state, unsigned long timeout = 1000000L);
void tone(uint8_t _pin, unsigned int frequency, unsigned long duration = 0);
void noTone(uint8_t _pin);

2
hardware/arduino/avr/cores/arduino/wiring_private.h
View File

@ -43,6 +43,8 @@ extern "C"{
#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
#endif
uint32_t countPulseASM(volatile uint8_t *port, uint8_t bit, uint8_t stateMask, unsigned long maxloops);
#define EXTERNAL_INT_0 0
#define EXTERNAL_INT_1 1
#define EXTERNAL_INT_2 2

178
hardware/arduino/avr/cores/arduino/wiring_pulse.S Normal file
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@ -0,0 +1,178 @@
/*
wiring_pulse.s - pulseInASM() function in different flavours
Part of Arduino - http://www.arduino.cc/
Copyright (c) 2014 Martino Facchin
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
*/
/*
* The following routine was generated by avr-gcc 4.8.3 with the following parameters
* -gstabs -Wa,-ahlmsd=output.lst -dp -fverbose-asm -O2
* on the original C function
*
* unsigned long pulseInSimpl(volatile uint8_t *port, uint8_t bit, uint8_t stateMask, unsigned long maxloops)
* {
* unsigned long width = 0;
* // wait for any previous pulse to end
* while ((*port & bit) == stateMask)
* if (--maxloops == 0)
* return 0;
*
* // wait for the pulse to start
* while ((*port & bit) != stateMask)
* if (--maxloops == 0)
* return 0;
*
* // wait for the pulse to stop
* while ((*port & bit) == stateMask) {
* if (++width == maxloops)
* return 0;
* }
* return width;
* }
*
* some compiler outputs were removed but the rest of the code is untouched
*/
#include <avr/io.h>
.section .text
.global countPulseASM
countPulseASM:
.LM0:
.LFBB1:
push r12 ; ; 130 pushqi1/1 [length = 1]
push r13 ; ; 131 pushqi1/1 [length = 1]
push r14 ; ; 132 pushqi1/1 [length = 1]
push r15 ; ; 133 pushqi1/1 [length = 1]
push r16 ; ; 134 pushqi1/1 [length = 1]
push r17 ; ; 135 pushqi1/1 [length = 1]
/* prologue: function */
/* frame size = 0 */
/* stack size = 6 */
.L__stack_usage = 6
mov r30,r24 ; port, port ; 2 *movhi/1 [length = 2]
mov r31,r25 ; port, port
/* unsigned long width = 0;
*** // wait for any previous pulse to end
*** while ((*port & bit) == stateMask)
*/
.LM1:
rjmp .L2 ; ; 181 jump [length = 1]
.L4:
/* if (--maxloops == 0) */
.LM2:
subi r16,1 ; maxloops, ; 17 addsi3/2 [length = 4]
sbc r17, r1 ; maxloops
sbc r18, r1 ; maxloops
sbc r19, r1 ; maxloops
breq .L13 ; , ; 19 branch [length = 1]
.L2:
/* if (--maxloops == 0) */
.LM3:
ld r25,Z ; D.1554, *port_7(D) ; 22 movqi_insn/4 [length = 1]
and r25,r22 ; D.1554, bit ; 24 andqi3/1 [length = 1]
cp r25,r20 ; D.1554, stateMask ; 25 *cmpqi/2 [length = 1]
breq .L4 ; , ; 26 branch [length = 1]
rjmp .L6 ; ; 184 jump [length = 1]
.L7:
/* return 0;
***
*** // wait for the pulse to start
*** while ((*port & bit) != stateMask)
*** if (--maxloops == 0)
*/
.LM4:
subi r16,1 ; maxloops, ; 31 addsi3/2 [length = 4]
sbc r17, r1 ; maxloops
sbc r18, r1 ; maxloops
sbc r19, r1 ; maxloops
breq .L13 ; , ; 33 branch [length = 1]
.L6:
/* if (--maxloops == 0) */
.LM5:
ld r25,Z ; D.1554, *port_7(D) ; 41 movqi_insn/4 [length = 1]
and r25,r22 ; D.1554, bit ; 43 andqi3/1 [length = 1]
cpse r25,r20 ; D.1554, stateMask ; 44 enable_interrupt-3 [length = 1]
rjmp .L7 ;
mov r12, r1 ; width ; 7 *movsi/2 [length = 4]
mov r13, r1 ; width
mov r14, r1 ; width
mov r15, r1 ; width
rjmp .L9 ; ; 186 jump [length = 1]
.L10:
/* return 0;
***
*** // wait for the pulse to stop
*** while ((*port & bit) == stateMask) {
*** if (++width == maxloops)
*/
.LM6:
ldi r24,-1 ; , ; 50 addsi3/3 [length = 5]
sub r12,r24 ; width,
sbc r13,r24 ; width,
sbc r14,r24 ; width,
sbc r15,r24 ; width,
cp r16,r12 ; maxloops, width ; 51 *cmpsi/2 [length = 4]
cpc r17,r13 ; maxloops, width
cpc r18,r14 ; maxloops, width
cpc r19,r15 ; maxloops, width
breq .L13 ; , ; 52 branch [length = 1]
.L9:
/* if (++width == maxloops) */
.LM7:
ld r24,Z ; D.1554, *port_7(D) ; 60 movqi_insn/4 [length = 1]
and r24,r22 ; D.1554, bit ; 62 andqi3/1 [length = 1]
cp r24,r20 ; D.1554, stateMask ; 63 *cmpqi/2 [length = 1]
breq .L10 ; , ; 64 branch [length = 1]
/* return 0;
*** }
*** return width;
*/
.LM8:
mov r22,r12 ; D.1553, width ; 108 movqi_insn/1 [length = 1]
mov r23,r13 ; D.1553, width ; 109 movqi_insn/1 [length = 1]
mov r24,r14 ; D.1553, width ; 110 movqi_insn/1 [length = 1]
mov r25,r15 ; D.1553, width ; 111 movqi_insn/1 [length = 1]
/* epilogue start */
.LM9:
pop r17 ; ; 171 popqi [length = 1]
pop r16 ; ; 172 popqi [length = 1]
pop r15 ; ; 173 popqi [length = 1]
pop r14 ; ; 174 popqi [length = 1]
pop r13 ; ; 175 popqi [length = 1]
pop r12 ; ; 176 popqi [length = 1]
ret ; 177 return_from_epilogue [length = 1]
.L13:
.LM10:
ldi r22,0 ; D.1553 ; 120 movqi_insn/1 [length = 1]
ldi r23,0 ; D.1553 ; 121 movqi_insn/1 [length = 1]
ldi r24,0 ; D.1553 ; 122 movqi_insn/1 [length = 1]
ldi r25,0 ; D.1553 ; 123 movqi_insn/1 [length = 1]
/* epilogue start */
.LM11:
pop r17 ; ; 138 popqi [length = 1]
pop r16 ; ; 139 popqi [length = 1]
pop r15 ; ; 140 popqi [length = 1]
pop r14 ; ; 141 popqi [length = 1]
pop r13 ; ; 142 popqi [length = 1]
pop r12 ; ; 143 popqi [length = 1]
ret ; 144 return_from_epilogue [length = 1]

80
hardware/arduino/avr/cores/arduino/wiring_pulse.c
View File

@ -28,7 +28,10 @@
/* Measures the length (in microseconds) of a pulse on the pin; state is HIGH
* or LOW, the type of pulse to measure. Works on pulses from 2-3 microseconds
* to 3 minutes in length, but must be called at least a few dozen microseconds
* before the start of the pulse. */
* before the start of the pulse.
*
* This function performs better with short pulses in noInterrupt() context
*/
unsigned long pulseIn(uint8_t pin, uint8_t state, unsigned long timeout)
{
// cache the port and bit of the pin in order to speed up the
@ -38,48 +41,59 @@ unsigned long pulseIn(uint8_t pin, uint8_t state, unsigned long timeout)
uint8_t port = digitalPinToPort(pin);
uint8_t stateMask = (state ? bit : 0);
unsigned long width = 0; // keep initialization out of time critical area
// convert the timeout from microseconds to a number of times through
// the initial loop; it takes approximately 16 clock cycles per iteration
unsigned long numloops = 0;
unsigned long maxloops = microsecondsToClockCycles(timeout)/16;
width = countPulseASM(portInputRegister(port), bit, stateMask, maxloops);
//prevent clockCyclesToMicroseconds to return bogus values if countPulseASM timed out
if (width)
return clockCyclesToMicroseconds(width * 16 + 16);
else
return 0;
}
/* Measures the length (in microseconds) of a pulse on the pin; state is HIGH
* or LOW, the type of pulse to measure. Works on pulses from 2-3 microseconds
* to 3 minutes in length, but must be called at least a few dozen microseconds
* before the start of the pulse.
*
* ATTENTION:
* this function relies on micros() so cannot be used in noInterrupt() context
*/
unsigned long pulseInLong(uint8_t pin, uint8_t state, unsigned long timeout)
{
// cache the port and bit of the pin in order to speed up the
// pulse width measuring loop and achieve finer resolution. calling
// digitalRead() instead yields much coarser resolution.
uint8_t bit = digitalPinToBitMask(pin);
uint8_t port = digitalPinToPort(pin);
uint8_t stateMask = (state ? bit : 0);
unsigned long width = 0; // keep initialization out of time critical area
// convert the timeout from microseconds to a number of times through
// the initial loop; it takes 16 clock cycles per iteration.
unsigned long numloops = 0;
unsigned long maxloops = microsecondsToClockCycles(timeout) / 16;
unsigned long maxloops = microsecondsToClockCycles(timeout);
// wait for any previous pulse to end
while ((*portInputRegister(port) & bit) == stateMask)
if (numloops++ == maxloops)
return 0;
// wait for the pulse to start
while ((*portInputRegister(port) & bit) != stateMask)
if (numloops++ == maxloops)
return 0;
// wait for the pulse to stop
while ((*portInputRegister(port) & bit) == stateMask) {
if (numloops++ == maxloops)
return 0;
width++;
}
// convert the reading to microseconds. There will be some error introduced by
// the interrupt handlers.
// Conversion constants are compiler-dependent, different compiler versions
// have different levels of optimization.
#if __GNUC__==4 && __GNUC_MINOR__==3 && __GNUC_PATCHLEVEL__==2
// avr-gcc 4.3.2
return clockCyclesToMicroseconds(width * 21 + 16);
#elif __GNUC__==4 && __GNUC_MINOR__==8 && __GNUC_PATCHLEVEL__==1
// avr-gcc 4.8.1
return clockCyclesToMicroseconds(width * 24 + 16);
#elif __GNUC__<=4 && __GNUC_MINOR__<=3
// avr-gcc <=4.3.x
#warning "pulseIn() results may not be accurate"
return clockCyclesToMicroseconds(width * 21 + 16);
#else
// avr-gcc >4.3.x
#warning "pulseIn() results may not be accurate"
return clockCyclesToMicroseconds(width * 24 + 16);
#endif
unsigned long start = micros();
// wait for the pulse to stop
while ((*portInputRegister(port) & bit) == stateMask) {
if (numloops++ == maxloops)
return 0;
}
return micros() - start;
}

82
hardware/arduino/sam/cores/arduino/wiring_pulse.cpp
View File

@ -22,40 +22,72 @@
/* Measures the length (in microseconds) of a pulse on the pin; state is HIGH
* or LOW, the type of pulse to measure. Works on pulses from 2-3 microseconds
* to 3 minutes in length, but must be called at least a few dozen microseconds
* before the start of the pulse. */
extern uint32_t pulseIn( uint32_t pin, uint32_t state, uint32_t timeout )
* before the start of the pulse.
*
* ATTENTION:
* This function performs better with short pulses in noInterrupt() context
*/
uint32_t pulseIn( uint32_t pin, uint32_t state, uint32_t timeout )
{
// cache the port and bit of the pin in order to speed up the
// pulse width measuring loop and achieve finer resolution. calling
// digitalRead() instead yields much coarser resolution.
PinDescription p = g_APinDescription[pin];
uint32_t width = 0; // keep initialization out of time critical area
uint32_t bit = p.ulPin;
uint32_t stateMask = state ? bit : 0;
// convert the timeout from microseconds to a number of times through
// the initial loop; it takes 22 clock cycles per iteration.
uint32_t numloops = 0;
uint32_t maxloops = microsecondsToClockCycles(timeout) / 22;
// wait for any previous pulse to end
while (PIO_Get(p.pPort, PIO_INPUT, p.ulPin) == state)
if (numloops++ == maxloops)
return 0;
// wait for the pulse to start
while (PIO_Get(p.pPort, PIO_INPUT, p.ulPin) != state)
if (numloops++ == maxloops)
return 0;
// wait for the pulse to stop
while (PIO_Get(p.pPort, PIO_INPUT, p.ulPin) == state) {
if (numloops++ == maxloops)
return 0;
width++;
}
// the initial loop; it takes (roughly) 18 clock cycles per iteration.
uint32_t maxloops = microsecondsToClockCycles(timeout) / 18;
uint32_t width = countPulseASM(&(p.pPort->PIO_PDSR), bit, stateMask, maxloops);
// convert the reading to microseconds. The loop has been determined
// to be 52 clock cycles long and have about 16 clocks between the edge
// to be 18 clock cycles long and have about 16 clocks between the edge
// and the start of the loop. There will be some error introduced by
// the interrupt handlers.
return clockCyclesToMicroseconds(width * 52 + 16);
if (width)
return clockCyclesToMicroseconds(width * 18 + 16);
else
return 0;
}
/* Measures the length (in microseconds) of a pulse on the pin; state is HIGH
* or LOW, the type of pulse to measure. Works on pulses from 2-3 microseconds
* to 3 minutes in length, but must be called at least a few dozen microseconds
* before the start of the pulse.
*
* ATTENTION:
* this function relies on micros() so cannot be used in noInterrupt() context
*/
uint32_t pulseInLong(uint8_t pin, uint8_t state, unsigned long timeout)
{
// cache the port and bit of the pin in order to speed up the
// pulse width measuring loop and achieve finer resolution. calling
// digitalRead() instead yields much coarser resolution.
PinDescription p = g_APinDescription[pin];
uint32_t bit = p.ulPin;
uint32_t stateMask = state ? bit : 0;
// convert the timeout from microseconds to a number of times through
// the initial loop; it takes 18 clock cycles per iteration.
unsigned long maxloops = microsecondsToClockCycles(timeout) / 10;
// wait for any previous pulse to end
while ((p.pPort->PIO_PDSR & bit) == stateMask)
if (--maxloops == 0)
return 0;
// wait for the pulse to start
while ((p.pPort->PIO_PDSR & bit) != stateMask)
if (--maxloops == 0)
return 0;
unsigned long start = micros();
// wait for the pulse to stop
while ((p.pPort->PIO_PDSR & bit) == stateMask) {
if (--maxloops == 0)
return 0;
}
return micros() - start;
}

3
hardware/arduino/sam/cores/arduino/wiring_pulse.h
View File

@ -23,6 +23,7 @@
extern "C" {
#endif
unsigned long countPulseASM(const volatile uint32_t *port, uint32_t bit, uint32_t stateMask, unsigned long maxloops);
/*
* \brief Measures the length (in microseconds) of a pulse on the pin; state is HIGH
* or LOW, the type of pulse to measure. Works on pulses from 2-3 microseconds
@ -30,7 +31,7 @@
* before the start of the pulse.
*/
extern uint32_t pulseIn( uint32_t ulPin, uint32_t ulState, uint32_t ulTimeout = 1000000L ) ;
extern uint32_t pulseInLong( uint8_t pin, uint8_t state, unsigned long timeout = 1000000L ) ;
#ifdef __cplusplus
}

166
hardware/arduino/sam/cores/arduino/wiring_pulse_asm.S Normal file
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@ -0,0 +1,166 @@
/*
Copyright (c) 2015 Arduino LLC. All right reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
The following function has been compiled to ASM with gcc
unsigned long countPulseASM(const volatile uint32_t *port, uint32_t bit, uint32_t stateMask, unsigned long maxloops)
{
unsigned long width = 0;
// wait for any previous pulse to end
while ((*port & bit) == stateMask)
if (--maxloops == 0)
return 0;
// wait for the pulse to start
while ((*port & bit) != stateMask)
if (--maxloops == 0)
return 0;
// wait for the pulse to stop
while ((*port & bit) == stateMask) {
if (++width == maxloops)
return 0;
}
return width;
}
using the command line:
arm-none-eabi-gcc -mcpu=cortex-m3 -mthumb -c -O2 -W -ffunction-sections -fdata-sections -nostdlib \
countPulseASM.c -Wa,-ahlmsd=output.lst -dp -fverbose-asm -S \
-I.arduino15/packages/arduino/hardware/sam/1.6.3/cores/arduino \
-I.arduino15/packages/arduino/hardware/sam/1.6.3/system/CMSIS/CMSIS/Include \
-I.arduino15/packages/arduino/hardware/sam/1.6.3/system/CMSIS/Device/ATMEL \
-I.arduino15/packages/arduino/hardware/sam/1.6.3/system/libsam/include \
-I.arduino15/packages/arduino/hardware/sam/1.6.3/variants/arduino_due_x
The result has been slightly edited to increase readability.
*/
.syntax unified
.cpu cortex-m3
.fpu softvfp
.eabi_attribute 20, 1 @ Tag_ABI_FP_denormal
.eabi_attribute 21, 1 @ Tag_ABI_FP_exceptions
.eabi_attribute 23, 3 @ Tag_ABI_FP_number_model
.eabi_attribute 24, 1 @ Tag_ABI_align8_needed
.eabi_attribute 25, 1 @ Tag_ABI_align8_preserved
.eabi_attribute 26, 1 @ Tag_ABI_enum_size
.eabi_attribute 30, 2 @ Tag_ABI_optimization_goals
.eabi_attribute 34, 1 @ Tag_CPU_unaligned_access
.eabi_attribute 18, 4 @ Tag_ABI_PCS_wchar_t
.file "countPulseASM.c"
@ GNU C (GNU Tools for ARM Embedded Processors) version 4.9.3 20150303 (release) [ARM/embedded-4_9-branch revision 221220] (arm-none-eabi)
@ compiled by GNU C version 4.7.4, GMP version 4.3.2, MPFR version 2.4.2, MPC version 0.8.1
@ GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
@ options passed:
@ -I .arduino15/packages/arduino/hardware/sam/1.6.3/cores/arduino
@ -I .arduino15/packages/arduino/hardware/sam/1.6.3/system/CMSIS/CMSIS/Include
@ -I .arduino15/packages/arduino/hardware/sam/1.6.3/system/CMSIS/Device/ATMEL
@ -I .arduino15/packages/arduino/hardware/sam/1.6.3/system/libsam/include
@ -I .arduino15/packages/arduino/hardware/sam/1.6.3/variants/arduino_due_x
@ -imultilib armv7-m -iprefix /usr/bin/../lib/gcc/arm-none-eabi/4.9.3/
@ -isysroot /usr/bin/../arm-none-eabi -D__USES_INITFINI__ countPulseASM.c
@ -mcpu=cortex-m3 -mthumb -O2 -Wextra -ffunction-sections -fdata-sections
@ -fverbose-asm
@ options enabled: -faggressive-loop-optimizations -fauto-inc-dec
@ -fbranch-count-reg -fcaller-saves -fcombine-stack-adjustments -fcommon
@ -fcompare-elim -fcprop-registers -fcrossjumping -fcse-follow-jumps
@ -fdata-sections -fdefer-pop -fdelete-null-pointer-checks -fdevirtualize
@ -fdevirtualize-speculatively -fdwarf2-cfi-asm -fearly-inlining
@ -feliminate-unused-debug-types -fexpensive-optimizations
@ -fforward-propagate -ffunction-cse -ffunction-sections -fgcse -fgcse-lm
@ -fgnu-runtime -fgnu-unique -fguess-branch-probability
@ -fhoist-adjacent-loads -fident -fif-conversion -fif-conversion2
@ -findirect-inlining -finline -finline-atomics
@ -finline-functions-called-once -finline-small-functions -fipa-cp
@ -fipa-profile -fipa-pure-const -fipa-reference -fipa-sra
@ -fira-hoist-pressure -fira-share-save-slots -fira-share-spill-slots
@ -fisolate-erroneous-paths-dereference -fivopts -fkeep-static-consts
@ -fleading-underscore -flifetime-dse -fmath-errno -fmerge-constants
@ -fmerge-debug-strings -fmove-loop-invariants -fomit-frame-pointer
@ -foptimize-sibling-calls -foptimize-strlen -fpartial-inlining -fpeephole
@ -fpeephole2 -fprefetch-loop-arrays -freg-struct-return -freorder-blocks
@ -freorder-functions -frerun-cse-after-loop
@ -fsched-critical-path-heuristic -fsched-dep-count-heuristic
@ -fsched-group-heuristic -fsched-interblock -fsched-last-insn-heuristic
@ -fsched-pressure -fsched-rank-heuristic -fsched-spec
@ -fsched-spec-insn-heuristic -fsched-stalled-insns-dep -fschedule-insns
@ -fschedule-insns2 -fsection-anchors -fshow-column -fshrink-wrap
@ -fsigned-zeros -fsplit-ivs-in-unroller -fsplit-wide-types
@ -fstrict-aliasing -fstrict-overflow -fstrict-volatile-bitfields
@ -fsync-libcalls -fthread-jumps -ftoplevel-reorder -ftrapping-math
@ -ftree-bit-ccp -ftree-builtin-call-dce -ftree-ccp -ftree-ch
@ -ftree-coalesce-vars -ftree-copy-prop -ftree-copyrename -ftree-cselim
@ -ftree-dce -ftree-dominator-opts -ftree-dse -ftree-forwprop -ftree-fre
@ -ftree-loop-if-convert -ftree-loop-im -ftree-loop-ivcanon
@ -ftree-loop-optimize -ftree-parallelize-loops= -ftree-phiprop -ftree-pre
@ -ftree-pta -ftree-reassoc -ftree-scev-cprop -ftree-sink -ftree-slsr
@ -ftree-sra -ftree-switch-conversion -ftree-tail-merge -ftree-ter
@ -ftree-vrp -funit-at-a-time -fverbose-asm -fzero-initialized-in-bss
@ -mfix-cortex-m3-ldrd -mlittle-endian -mlra -mpic-data-is-text-relative
@ -msched-prolog -mthumb -munaligned-access -mvectorize-with-neon-quad
.section .text.countPulseASM,"ax",%progbits
.align 2
.global countPulseASM
.thumb
.thumb_func
.type countPulseASM, %function
countPulseASM:
@ args = 0, pretend = 0, frame = 0
@ frame_needed = 0, uses_anonymous_args = 0
@ link register save eliminated.
push {r4, r5} @ @ 132 *push_multi [length = 2]
b .L2 @ @ 178 *arm_jump [length = 2]
.L4:
subs r3, r3, #1 @ maxloops, maxloops, @ 18 thumb2_addsi3_compare0/1 [length = 2]
beq .L12 @, @ 19 arm_cond_branch [length = 2]
.L2:
ldr r4, [r0] @ D.4169, *port_7(D) @ 22 *thumb2_movsi_insn/6 [length = 4]
ands r4, r4, r1 @, D.4169, D.4169, bit @ 24 *thumb2_alusi3_short [length = 2]
cmp r4, r2 @ D.4169, stateMask @ 25 *arm_cmpsi_insn/2 [length = 2]
beq .L4 @, @ 26 arm_cond_branch [length = 2]
b .L6 @ @ 181 *arm_jump [length = 2]
.L7:
subs r3, r3, #1 @ maxloops, maxloops, @ 32 thumb2_addsi3_compare0/1 [length = 2]
beq .L12 @, @ 33 arm_cond_branch [length = 2]
.L6:
ldr r4, [r0] @ D.4169, *port_7(D) @ 41 *thumb2_movsi_insn/6 [length = 4]
ands r4, r4, r1 @, D.4169, D.4169, bit @ 43 *thumb2_alusi3_short [length = 2]
cmp r4, r2 @ D.4169, stateMask @ 44 *arm_cmpsi_insn/2 [length = 2]
bne .L7 @, @ 45 arm_cond_branch [length = 2]
movs r5, #0 @ width, @ 7 *thumb2_movsi_shortim [length = 2]
b .L9 @ @ 183 *arm_jump [length = 2]
.L10:
adds r5, r5, #1 @ width, width, @ 50 *thumb2_addsi_short/1 [length = 2]
cmp r3, r5 @ maxloops, width @ 51 *arm_cmpsi_insn/2 [length = 2]
beq .L22 @, @ 52 arm_cond_branch [length = 2]
.L9:
ldr r4, [r0] @ D.4169, *port_7(D) @ 60 *thumb2_movsi_insn/6 [length = 4]
ands r4, r4, r1 @, D.4169, D.4169, bit @ 62 *thumb2_alusi3_short [length = 2]
cmp r4, r2 @ D.4169, stateMask @ 63 *arm_cmpsi_insn/2 [length = 2]
beq .L10 @, @ 64 arm_cond_branch [length = 2]
mov r0, r5 @ D.4169, width @ 9 *thumb2_movsi_insn/1 [length = 2]
pop {r4, r5} @ @ 165 *load_multiple_with_writeback [length = 4]
bx lr @ @ 166 *thumb2_return [length = 4]
.L12:
mov r0, r3 @ D.4169, maxloops @ 8 *thumb2_movsi_insn/1 [length = 2]
pop {r4, r5} @ @ 137 *load_multiple_with_writeback [length = 4]
bx lr @ @ 138 *thumb2_return [length = 4]
.L22:
movs r0, #0 @ D.4169, @ 11 *thumb2_movsi_shortim [length = 2]
pop {r4, r5} @ @ 173 *load_multiple_with_writeback [length = 4]
bx lr @ @ 174 *thumb2_return [length = 4]
.size countPulseASM, .-countPulseASM
.ident "GCC: (GNU Tools for ARM Embedded Processors) 4.9.3 20150303 (release) [ARM/embedded-4_9-branch revision 221220]"

7
hardware/arduino/sam/platform.txt
View File

@ -22,7 +22,8 @@ compiler.c.cmd=arm-none-eabi-gcc
compiler.c.flags=-c -g -Os {compiler.warning_flags} -ffunction-sections -fdata-sections -nostdlib --param max-inline-insns-single=500 -Dprintf=iprintf -MMD
compiler.c.elf.cmd=arm-none-eabi-gcc
compiler.c.elf.flags=-Os -Wl,--gc-sections
compiler.S.flags=-c -g -x assembler-with-cpp
compiler.S.cmd=arm-none-eabi-gcc
compiler.S.flags=-c -g -x assembler-with-cpp -mthumb
compiler.cpp.cmd=arm-none-eabi-g++
compiler.cpp.flags=-c -g -Os {compiler.warning_flags} -ffunction-sections -fdata-sections -nostdlib -fno-threadsafe-statics --param max-inline-insns-single=500 -fno-rtti -fno-exceptions -Dprintf=iprintf -MMD
compiler.ar.cmd=arm-none-eabi-ar
@ -42,6 +43,7 @@ build.extra_flags=
compiler.c.extra_flags=
compiler.c.elf.extra_flags=
compiler.cpp.extra_flags=
compiler.S.extra_flags=
compiler.ar.extra_flags=
compiler.elf2hex.extra_flags=
@ -66,6 +68,9 @@ recipe.c.o.pattern="{compiler.path}{compiler.c.cmd}" {compiler.c.flags} -mcpu={b
## Compile c++ files
recipe.cpp.o.pattern="{compiler.path}{compiler.cpp.cmd}" {compiler.cpp.flags} -mcpu={build.mcu} -DF_CPU={build.f_cpu} -DARDUINO={runtime.ide.version} -DARDUINO_{build.board} -DARDUINO_ARCH_{build.arch} {compiler.cpp.extra_flags} {build.extra_flags} {compiler.libsam.c.flags} {includes} "{source_file}" -o "{object_file}"
## Compile S files
recipe.S.o.pattern="{compiler.path}{compiler.S.cmd}" {compiler.S.flags} -mcpu={build.mcu} -DF_CPU={build.f_cpu} -DARDUINO={runtime.ide.version} -DARDUINO_{build.board} -DARDUINO_ARCH_{build.arch} {compiler.S.extra_flags} {build.extra_flags} {compiler.libsam.c.flags} {includes} "{source_file}" -o "{object_file}"
## Create archives
recipe.ar.pattern="{compiler.path}{compiler.ar.cmd}" {compiler.ar.flags} {compiler.ar.extra_flags} "{build.path}/{archive_file}" "{object_file}"