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arm/newlib: Add pseudomodule to enable floating point printf support

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This commit is contained in:
Alexandre Abadie 2016-03-16 10:00:03 +01:00
parent b46b9d9086
commit e1fcee67c0
5 changed files with 65 additions and 0 deletions
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1
Makefile.pseudomodules
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@ -23,6 +23,7 @@ PSEUDOMODULES += schedstatistics
PSEUDOMODULES += netif PSEUDOMODULES += netif
PSEUDOMODULES += saul_default PSEUDOMODULES += saul_default
PSEUDOMODULES += saul_gpio PSEUDOMODULES += saul_gpio
PSEUDOMODULES += printf_float
# include variants of the AT86RF2xx drivers as pseudo modules # include variants of the AT86RF2xx drivers as pseudo modules
PSEUDOMODULES += at86rf23% PSEUDOMODULES += at86rf23%

1
cpu/Makefile.include.cortexm_common
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@ -95,6 +95,7 @@ include $(RIOTCPU)/cortexm_common/Makefile.include
# use the nano-specs of Newlib when available # use the nano-specs of Newlib when available
USEMODULE += newlib_nano USEMODULE += newlib_nano
export USE_NANO_SPECS = 1
# Avoid overriding the default rule: # Avoid overriding the default rule:
all: all:

6
sys/Makefile.include
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@ -63,4 +63,10 @@ ifneq (,$(filter arduino,$(USEMODULE)))
include $(RIOTBASE)/sys/arduino/Makefile.include include $(RIOTBASE)/sys/arduino/Makefile.include
endif endif
ifneq (,$(filter printf_float,$(USEMODULE)))
ifeq (1,$(USE_NANO_SPECS))
export LINKFLAGS += -u _printf_float
endif
endif
INCLUDES += -I$(RIOTBASE)/sys/libc/include INCLUDES += -I$(RIOTBASE)/sys/libc/include

6
tests/printf_float/Makefile Normal file
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@ -0,0 +1,6 @@
APPLICATION = test_printf_float
include ../Makefile.tests_common
USEMODULE += printf_float
include $(RIOTBASE)/Makefile.include

51
tests/printf_float/main.c Normal file
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@ -0,0 +1,51 @@
/*
* Copyright (C) 2016 Alexandre Abadie <alexandre.abadie@inria.fr>
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup tests
* @{
*
* @file
* @brief print floating point values test application
*
* This test is supposed to check that floating point values can be
* displayed with printf function.
*
* @author Alexandre Abadie <alexandre.abadie@inria.fr>
*
* @}
*/
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
static const char * expected_result = "2016.0";
static const double floating_point_value = 2016.0317;
int main(void)
{
const uint8_t str_len = strlen(expected_result);
char result[str_len];
snprintf(result, str_len + 1,
"%.f", floating_point_value);
printf("Value displayed: %s\n", result);
if (strcmp(result, expected_result) == 0) {
printf("[OK]\n");
}
else {
printf("[FAILED] Values are not equal:\n"
"actual: %s\n"
"expected: %s\n", result, expected_result);
return 1;
}
return 0;
}