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examples: add CORDIC example

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This commit is contained in:
raiden00pl 2021-07-20 13:05:00 +02:00 committed by Alan Carvalho de Assis
parent a0fbd104fa
commit e21330df53
5 changed files with 353 additions and 0 deletions
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4
examples/README.md
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@ -209,6 +209,10 @@ Attempts to keep the system busy by passing data through a pipe in loop back
mode. This may be useful if you are trying run down other problems that you
think might only occur when the system is very busy.
## `cordic`
A simple test of the CORDIC character driver.
## `dac` Write to DAC
This is a tool for writing values to DAC device.

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examples/cordic/Kconfig Normal file
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#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#
config EXAMPLES_CORDIC
tristate "CORDIC example"
default n
---help---
Enable the CORDIC example
if EXAMPLES_CORDIC
config EXAMPLES_CORDIC_DEVPATH
string "CORDIC Device Path"
default "/dev/cordic0"
---help---
The device path
config EXAMPLES_CORDIC_PROGNAME
string "Program name"
default "cordic"
---help---
This is the name of the program that will be used when the NSH ELF
program is installed.
config EXAMPLES_CORDIC_PRIORITY
int "CORDIC task priority"
default 100
config EXAMPLES_CORDIC_STACKSIZE
int "CORDIC stack size"
default DEFAULT_TASK_STACKSIZE
endif

23
examples/cordic/Make.defs Normal file
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############################################################################
# apps/examples/cordic/Make.defs
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership. The
# ASF licenses this file to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance with the
# License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
############################################################################
ifneq ($(CONFIG_EXAMPLES_CORDIC),)
CONFIGURED_APPS += $(APPDIR)/examples/cordic
endif

34
examples/cordic/Makefile Normal file
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############################################################################
# apps/examples/cordic/Make.defs
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership. The
# ASF licenses this file to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance with the
# License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
############################################################################
include $(APPDIR)/Make.defs
# CORDIC built-in application info
PROGNAME = $(CONFIG_EXAMPLES_CORDIC_PROGNAME)
PRIORITY = $(CONFIG_EXAMPLES_CORDIC_PRIORITY)
STACKSIZE = $(CONFIG_EXAMPLES_CORDIC_STACKSIZE)
MODULE = $(CONFIG_EXAMPLES_CORDIC)
# CORDIC Example
MAINSRC = cordic_main.c
include $(APPDIR)/Application.mk

257
examples/cordic/cordic_main.c Normal file
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@ -0,0 +1,257 @@
/****************************************************************************
* apps/examples/cordic/cordic_main.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <debug.h>
#include <math.h>
#include <fixedmath.h>
#include <nuttx/math/cordic.h>
#include <nuttx/math/math_ioctl.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef CONFIG_MATH_CORDIC_USE_Q31
# error Not supported
#endif
#ifndef CONFIG_LIBC_FLOATINGPOINT
# error CONFIG_LIBC_FLOATINGPOINT must be enabled
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* cordic_main
****************************************************************************/
int main(int argc, FAR char *argv[])
{
struct cordic_calc_s io;
int fd = 0;
int ret = OK;
float arg1f = 0.0f;
float arg2f = 0.0f;
float res1f = 0.0f;
float res2f = 0.0f;
b16_t arg1b16 = 0;
b16_t arg2b16 = 0;
b16_t res1b16 = 0;
b16_t res2b16 = 0;
/* Reset data */
memset(&io, 0, sizeof(struct cordic_calc_s));
/* Open the CORDIC device */
fd = open(CONFIG_EXAMPLES_CORDIC_DEVPATH, O_RDWR);
if (fd < 0)
{
printf("ERROR: open %s failed: %d\n",
CONFIG_EXAMPLES_CORDIC_DEVPATH, errno);
goto errout;
}
/* Get cosine */
arg1f = 0.05f;
arg2f = 1.0f;
io.func = CORDIC_CALC_FUNC_COS;
io.res2_incl = false;
io.arg1 = ftoq31(arg1f);
io.arg2 = ftoq31(arg2f);
ret = ioctl(fd, MATHIOC_CORDIC_CALC, (unsigned long)((uintptr_t)&io));
if (ret < 0)
{
printf("ERROR: MATHIOC_CORDIC_CALC failed, errno=%d\n", errno);
}
res1f = q31tof(io.res1);
res2f = q31tof(io.res2);
printf("[float] func=%" PRIu8 " res2_inc=%d "
"arg1f=%0.5f arg2=%0.5f res1=%0.5f res2=%0.5f\n",
io.func, io.res2_incl, arg1f, arg2f, res1f, res2f);
/* Get cosine and sine from single call */
arg1f = -0.5f;
arg2f = 1.0f;
io.func = CORDIC_CALC_FUNC_COS;
io.res2_incl = true;
io.arg1 = ftoq31(arg1f);
io.arg2 = ftoq31(arg2f);
ret = ioctl(fd, MATHIOC_CORDIC_CALC, (unsigned long)((uintptr_t)&io));
if (ret < 0)
{
printf("ERROR: MATHIOC_CORDIC_CALC failed, errno=%d\n", errno);
}
res1f = q31tof(io.res1);
res2f = q31tof(io.res2);
printf("[float] func=%" PRIu8 " res2_inc=%d "
"arg1f=%0.5f arg2=%0.5f res1f=%0.5f res2f=%0.5f\n",
io.func, io.res2_incl, arg1f, arg2f, res1f, res2f);
/* Get cosine and sine from single call */
arg1f = -0.1f;
arg2f = 1.0f;
io.func = CORDIC_CALC_FUNC_COS;
io.res2_incl = true;
io.arg1 = ftoq31(arg1f);
io.arg2 = ftoq31(arg2f);
ret = ioctl(fd, MATHIOC_CORDIC_CALC, (unsigned long)((uintptr_t)&io));
if (ret < 0)
{
printf("ERROR: MATHIOC_CORDIC_CALC failed, errno=%d\n", errno);
}
res1f = q31tof(io.res1);
res2f = q31tof(io.res2);
printf("[float] func=%" PRIu8 " res2_inc=%d "
"arg1f=%0.5f arg2=%0.5f res1=%0.5f res2=%0.5f\n",
io.func, io.res2_incl, arg1f, arg2f, res1f, res2f);
/* Get cosine and sine from single call */
arg1f = 0.8f;
arg2f = 1.0f;
io.func = CORDIC_CALC_FUNC_COS;
io.res2_incl = true;
io.arg1 = ftoq31(arg1f);
io.arg2 = ftoq31(arg2f);
ret = ioctl(fd, MATHIOC_CORDIC_CALC, (unsigned long)((uintptr_t)&io));
if (ret < 0)
{
printf("ERROR: MATHIOC_CORDIC_CALC failed, errno=%d\n", errno);
}
res1f = q31tof(io.res1);
res2f = q31tof(io.res2);
printf("[float] func=%" PRIu8 " res2_inc=%d "
"arg1f=%0.5f arg2=%0.5f res1=%0.5f res2=%0.5f\n",
io.func, io.res2_incl, arg1f, arg2f, res1f, res2f);
/* Get phase and modulus from single call */
arg1f = -0.5f;
arg2f = -0.5f;
io.func = CORDIC_CALC_FUNC_PHASE;
io.res2_incl = true;
io.arg1 = ftoq31(arg1f);
io.arg2 = ftoq31(arg2f);
ret = ioctl(fd, MATHIOC_CORDIC_CALC, (unsigned long)((uintptr_t)&io));
if (ret < 0)
{
printf("ERROR: MATHIOC_CORDIC_CALC failed, errno=%d\n", errno);
}
res1f = q31tof(io.res1);
res2f = q31tof(io.res2);
printf("[float] func=%" PRIu8 " res2_inc=%d "
"arg1f=%0.5f arg2=%0.5f res1f=%0.5f res2f=%0.5f\n",
io.func, io.res2_incl, arg1f, arg2f, res1f, res2f);
/* Get cosine and sine from single call (fixed16) */
arg1b16 = ftob16(-0.5f);
arg2b16 = ftob16(1.0f);
io.func = CORDIC_CALC_FUNC_COS;
io.res2_incl = true;
io.arg1 = b16toq31(arg1b16);
io.arg2 = b16toq31(arg2b16);
ret = ioctl(fd, MATHIOC_CORDIC_CALC, (unsigned long)((uintptr_t)&io));
if (ret < 0)
{
printf("ERROR: MATHIOC_CORDIC_CALC failed, errno=%d\n", errno);
}
res1b16 = q31tob16(io.res1);
res2b16 = q31tob16(io.res2);
printf("[fixed16] func=%" PRIu8 " res2_inc=%d "
"arg1f=%0.5f arg2=%0.5f res1=%0.5f res2=%0.5f\n",
io.func, io.res2_incl, b16tof(arg1b16), b16tof(arg2b16),
b16tof(res1b16), b16tof(res2b16));
/* Get phase and modulus from single call (fixed16) */
arg1b16 = ftob16(-0.5f);
arg2b16 = ftob16(-0.5f);
io.func = CORDIC_CALC_FUNC_PHASE;
io.res2_incl = true;
io.arg1 = b16toq31(arg1b16);
io.arg2 = b16toq31(arg2b16);
ret = ioctl(fd, MATHIOC_CORDIC_CALC, (unsigned long)((uintptr_t)&io));
if (ret < 0)
{
printf("ERROR: MATHIOC_CORDIC_CALC failed, errno=%d\n", errno);
}
res1b16 = q31tob16(io.res1);
res2b16 = q31tob16(io.res2);
printf("[fxied16] func=%" PRIu8 " res2_inc=%d "
"arg1f=%0.5f arg2=%0.5f res1=%0.5f res2=%0.5f\n",
io.func, io.res2_incl, b16tof(arg1b16), b16tof(arg2b16),
b16tof(res1b16), b16tof(res2b16));
errout:
/* Close CORDIC device */
if (fd > 0)
{
close(fd);
}
return 0;
}