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NUCLEO-L432KC: Added sinusoidal DAC wave generator example

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This commit is contained in:
Daniel P. Carvalho 2022-08-01 14:26:45 -03:00 committed by Xiang Xiao
parent 40e6c8dca4
commit dbb82c3191
5 changed files with 386 additions and 0 deletions
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17
boards/arm/stm32l4/nucleo-l432kc/Kconfig
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@ -141,4 +141,21 @@ config NUCLEOL432KC_SPWM_PHASE_NUM
endif endif
menuconfig NUCLEOL432KC_DAC_WGEN
depends on (STM32L4_DAC_LL_OPS) && (STM32L4_DAC1_DMA) && (STM32L4_TIM2_DAC)
bool "Sinusoidal DAC wave generator example"
default n
if NUCLEOL432KC_DAC_WGEN
config NUCLEOL432KC_DAC_WGEN_SAMPLES
int "Sine samples"
default 40
config NUCLEOL432KC_SPWM_FREQ
int "Waveform frequency in Hz"
default 50
endif
endif # ARCH_BOARD_NUCLEO_L432KC endif # ARCH_BOARD_NUCLEO_L432KC

72
boards/arm/stm32l4/nucleo-l432kc/configs/wgen/defconfig Normal file
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@ -0,0 +1,72 @@
#
# This file is autogenerated: PLEASE DO NOT EDIT IT.
#
# You can use "make menuconfig" to make any modifications to the installed .config file.
# You can then do "make savedefconfig" to generate a new defconfig file that includes your
# modifications.
#
# CONFIG_ARCH_FPU is not set
# CONFIG_NSH_ARGCAT is not set
# CONFIG_NSH_CMDOPT_HEXDUMP is not set
# CONFIG_NSH_CMDPARMS is not set
# CONFIG_NSH_DISABLE_IFCONFIG is not set
# CONFIG_NSH_DISABLE_PS is not set
CONFIG_ANALOG=y
CONFIG_ARCH="arm"
CONFIG_ARCH_BOARD="nucleo-l432kc"
CONFIG_ARCH_BOARD_NUCLEO_L432KC=y
CONFIG_ARCH_CHIP="stm32l4"
CONFIG_ARCH_CHIP_STM32L432KC=y
CONFIG_ARCH_CHIP_STM32L4=y
CONFIG_ARCH_INTERRUPTSTACK=2048
CONFIG_ARCH_STACKDUMP=y
CONFIG_BOARD_LOOPSPERMSEC=8499
CONFIG_BUILTIN=y
CONFIG_DAC=y
CONFIG_DEBUG_SYMBOLS=y
CONFIG_EXAMPLES_ALARM=y
CONFIG_EXAMPLES_RANDOM=y
CONFIG_HAVE_CXX=y
CONFIG_HAVE_CXXINITIALIZE=y
CONFIG_INIT_ENTRYPOINT="dac_wgen_main"
CONFIG_INTELHEX_BINARY=y
CONFIG_MM_REGIONS=2
CONFIG_NSH_ARCHINIT=y
CONFIG_NSH_BUILTIN_APPS=y
CONFIG_NSH_FILEIOSIZE=512
CONFIG_NSH_LINELEN=64
CONFIG_NSH_READLINE=y
CONFIG_NUCLEOL432KC_DAC_WGEN=y
CONFIG_PREALLOC_TIMERS=4
CONFIG_RAM_SIZE=65536
CONFIG_RAM_START=0x20000000
CONFIG_RAW_BINARY=y
CONFIG_RR_INTERVAL=200
CONFIG_RTC_ALARM=y
CONFIG_RTC_DATETIME=y
CONFIG_RTC_DRIVER=y
CONFIG_RTC_IOCTL=y
CONFIG_RTC_NALARMS=2
CONFIG_SCHED_WAITPID=y
CONFIG_SPI=y
CONFIG_STM32L4_DAC1=y
CONFIG_STM32L4_DAC1_DMA=y
CONFIG_STM32L4_DAC1_DMA_BUFFER_SIZE=40
CONFIG_STM32L4_DAC1_TIMER=2
CONFIG_STM32L4_DAC1_TIMER_FREQUENCY=2000
CONFIG_STM32L4_DAC_LL_OPS=y
CONFIG_STM32L4_DISABLE_IDLE_SLEEP_DURING_DEBUG=y
CONFIG_STM32L4_DMA1=y
CONFIG_STM32L4_DMA2=y
CONFIG_STM32L4_PWR=y
CONFIG_STM32L4_RNG=y
CONFIG_STM32L4_RTC=y
CONFIG_STM32L4_SAI1PLL=y
CONFIG_STM32L4_SRAM2_HEAP=y
CONFIG_STM32L4_TIM2=y
CONFIG_STM32L4_TIM2_DAC=y
CONFIG_STM32L4_USART2=y
CONFIG_SYSTEM_NSH=y
CONFIG_TASK_NAME_SIZE=0
CONFIG_TESTING_OSTEST=y
CONFIG_USART2_SERIAL_CONSOLE=y

8
boards/arm/stm32l4/nucleo-l432kc/include/board.h
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@ -61,6 +61,14 @@
#define ADC1_DMA_CHAN DMACHAN_ADC1_1 #define ADC1_DMA_CHAN DMACHAN_ADC1_1
/* Analog pin selections ****************************************************/
/* DAC
* Default is PA4 (same as ADC, do not use both at the same time)
*/
#define GPIO_DAC1_OUT GPIO_DAC1_OUT_1
/* Alternate function pin selections ****************************************/ /* Alternate function pin selections ****************************************/
/* USART1: /* USART1:

4
boards/arm/stm32l4/nucleo-l432kc/src/Makefile
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@ -80,4 +80,8 @@ ifeq ($(CONFIG_NUCLEOL432KC_SPWM),y)
CSRCS += stm32_spwm.c CSRCS += stm32_spwm.c
endif endif
ifeq ($(CONFIG_NUCLEOL432KC_DAC_WGEN),y)
CSRCS += stm32_dac_wgen.c
endif
include $(TOPDIR)/boards/Board.mk include $(TOPDIR)/boards/Board.mk

285
boards/arm/stm32l4/nucleo-l432kc/src/stm32_dac_wgen.c Normal file
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@ -0,0 +1,285 @@
/****************************************************************************
* boards/arm/stm32l4/nucleo-l432kc/src/stm32_dac_wgen.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 <debug.h>
#include <errno.h>
#include <math.h>
#include <stdint.h>
#include <stdio.h>
#include <syslog.h>
#include <nuttx/arch.h>
#include <nuttx/board.h>
#include <nuttx/signal.h>
#include <arch/board/board.h>
#include "stm32l4_dac.h"
#include "nucleo-l432kc.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
#ifndef CONFIG_NUCLEOL432KC_DAC_WGEN_SAMPLES
# define CONFIG_NUCLEOL432KC_DAC_WGEN_SAMPLES 40
#endif
#ifndef CONFIG_NUCLEOL432KC_DAC_WGEN_FREQ
# define CONFIG_NUCLEOL432KC_DAC_WGEN_FREQ 50
#endif
/* Assertions ***************************************************************/
#ifndef CONFIG_ARCH_CHIP_STM32L432KC
# warning "This only have been verified with CONFIG_ARCH_CHIP_STM32L432KC"
#endif
#ifndef CONFIG_DAC
# error "CONFIG_DAC is required"
#endif
#ifndef CONFIG_STM32L4_DAC1
# error "CONFIG_STM32L4_DAC1 is required"
#endif
#ifndef CONFIG_STM32L4_DAC_LL_OPS
# error "CONFIG_STM32L4_DAC_LL_OPS is required"
#endif
#ifndef CONFIG_STM32L4_DAC1_DMA
# error "CONFIG_STM32L4_DAC1_DMA is required"
#endif
#if (CONFIG_STM32L4_DAC1_DMA_BUFFER_SIZE < CONFIG_NUCLEOL432KC_DAC_WGEN_SAMPLES)
# error "DMA buffer size should be equal or greater than the number of samples."
#endif
/****************************************************************************
* Private Types
****************************************************************************/
/* DAC wave generator private data */
struct dac_wgen_s
{
struct stm32_dac_dev_s *dac;
uint16_t *dac_dmabuffer;
uint16_t samples; /* Waveform samples num */
float phase_step; /* Waveform phase step */
float waveform_freq; /* Waveform frequency */
};
/****************************************************************************
* Private Data
****************************************************************************/
static struct dac_wgen_s g_dac_wgen =
{
.dac = NULL,
.dac_dmabuffer = stm32l4_dac1_dmabuffer,
.samples = CONFIG_NUCLEOL432KC_DAC_WGEN_SAMPLES,
.waveform_freq = ((float)CONFIG_NUCLEOL432KC_DAC_WGEN_FREQ)
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static float waveform_func(float x);
static void waveform_init(struct dac_wgen_s *dac_wgen, float (*f)(float));
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: waveform_func
*
* Description:
* Modulation function. This function must return values from <0.0, 1.0>!
*
****************************************************************************/
static float waveform_func(float x)
{
DEBUGASSERT(x >= 0 && x <= 2 * M_PI);
/* Sine modulation */
return (sinf(x) + 1.0f) / 2.0f;
}
/****************************************************************************
* Name: waveform_init
*
* Description:
* Initialize waveform
*
****************************************************************************/
static void waveform_init(struct dac_wgen_s *dac_wgen, float (*f)(float))
{
int i;
float value;
/* Get phase step to achieve one sine waveform period */
dac_wgen->phase_step = (float)(2 * M_PI / dac_wgen->samples);
/* Initialize sine table */
for (i = 0; i < dac_wgen->samples; i += 1)
{
/* We need sine in range from 0 to 1.0 */
value = (sinf(dac_wgen->phase_step * i) + 1.0f) / 2.0f;
dac_wgen->dac_dmabuffer[i] = (uint16_t)(value * 4095);
}
}
/****************************************************************************
* Name: dac_wgen_start
****************************************************************************/
static int dac_wgen_start(struct dac_wgen_s *dac_wgen)
{
DAC_ENABLE(dac_wgen->dac, true);
DAC_START_DMA(dac_wgen->dac);
return OK;
}
/****************************************************************************
* Name: dac_wgen_stop
****************************************************************************/
static int dac_wgen_stop(struct dac_wgen_s *dac_wgen)
{
DAC_STOP_DMA(dac_wgen->dac);
DAC_ENABLE(dac_wgen->dac, false);
return OK;
}
/****************************************************************************
* Name: dac_wgen_setup
****************************************************************************/
int dac_wgen_setup(struct dac_wgen_s *dac_wgen)
{
struct dac_dev_s *dac;
int ret = OK;
dac = stm32l4_dacinitialize(0);
if (dac == NULL)
{
syslog(LOG_ERR, "Failed to get DAC interface\n");
ret = ERROR;
goto errout;
}
dac_wgen->dac = (struct stm32_dac_dev_s *)dac->ad_priv;
errout:
return ret;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: dac_wgen_main
*
* Description:
* Entrypoint for DAC waveform generator example.
*
****************************************************************************/
int dac_wgen_main(int argc, char *argv[])
{
struct dac_wgen_s *dac_wgen = NULL;
int i = 0;
int ret = OK;
dac_wgen = &g_dac_wgen;
syslog(LOG_INFO, "\ndac_wgen_main: Started\n");
/* Setup DAC wave generator */
ret = dac_wgen_setup(dac_wgen);
if (ret < 0)
{
syslog(LOG_ERR, "Failed to setup DAC WGEN %d!\n", ret);
goto errout;
}
/* Initialize modulation waveform */
waveform_init(dac_wgen, waveform_func);
if (ret < 0)
{
syslog(LOG_ERR, "Failed initialize waveform %d!\n", ret);
goto errout;
}
/* Start DAC wave generator */
ret = dac_wgen_start(dac_wgen);
if (ret < 0)
{
syslog(LOG_ERR, "Failed start DAC WGEN %d!\n", ret);
goto errout;
}
/* Main loop */
while (1)
{
/* Print counter */
syslog(LOG_INFO, "%d\n", i);
/* Increase counter */
i += 1;
/* Sleep */
nxsig_sleep(1);
}
errout:
dac_wgen_stop(dac_wgen);
return OK;
}