sergiotarxz/nuttx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

board/stm32f401rc-rs485: Add support to PWM/DAC

Browse Source 
Signed-off-by: Rodrigo Sim <rcsim10@gmail.com>
This commit is contained in:
Rodrigo Sim 2024-03-10 17:26:44 -03:00 committed by Xiang Xiao
parent 29e50ffa73
commit 82d3ffc3b0
8 changed files with 259 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
Documentation/platforms/arm/stm32f4/boards/stm32f401rc-rs485/index.rst
View File

@ -442,3 +442,26 @@ NSH commands::
1: channel: 4 value: 2682
Currently there is a bug that causes the application to always read the same value for channel 0 and 4. If you want to read the value from channel 2, you will need to enable the config "ADC1 Scan Mode".
dac
---
Configures the NuttShell (nsh) over USB Serial (check usbserial configuration) and enables PWM 3 on channel 1.
Use pwm command on NSH to change dutty cycle, frequency and duration, use dac_out_2 to measure the output voltage.
NSH commands::
nsh> pwm -h
Usage: pwm [OPTIONS]
Arguments are "sticky". For example, once the PWM frequency is
specified, that frequency will be re-used until it is changed.
"sticky" OPTIONS include:
[-p devpath] selects the PWM device. Default: /dev/pwm0 Current: NONE
[-f frequency] selects the pulse frequency. Default: 100 Hz Current: 100 Hz
[-d duty] selects the pulse duty as a percentage. Default: 50 % Current: 50 %
[-t duration] is the duration of the pulse train in seconds. Default: 5 Current: 5
[-h] shows this message and exits
nsh> pwm -d 50 -t 3
pwm_main: starting output with frequency: 50 duty: 00007fff
pwm_main: stopping output

67
boards/arm/stm32/stm32f401rc-rs485/configs/dac/defconfig Normal file
View File

@ -0,0 +1,67 @@
#
# 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_DISABLE_IFCONFIG is not set
# CONFIG_NSH_DISABLE_PS is not set
CONFIG_ARCH="arm"
CONFIG_ARCH_BOARD="stm32f401rc-rs485"
CONFIG_ARCH_BOARD_STM32F401RC_RS485=y
CONFIG_ARCH_BUTTONS=y
CONFIG_ARCH_CHIP="stm32"
CONFIG_ARCH_CHIP_STM32=y
CONFIG_ARCH_CHIP_STM32F401RC=y
CONFIG_ARCH_INTERRUPTSTACK=2048
CONFIG_ARCH_IRQBUTTONS=y
CONFIG_ARCH_STACKDUMP=y
CONFIG_BOARDCTL_USBDEVCTRL=y
CONFIG_BOARD_LOOPSPERMSEC=8499
CONFIG_BUILTIN=y
CONFIG_CDCACM=y
CONFIG_CDCACM_CONSOLE=y
CONFIG_EXAMPLES_BUTTONS=y
CONFIG_EXAMPLES_BUTTONS_NAME0="SW3"
CONFIG_EXAMPLES_BUTTONS_NAME1="SW4"
CONFIG_EXAMPLES_BUTTONS_NAME2="SW5"
CONFIG_EXAMPLES_BUTTONS_NAMES=y
CONFIG_EXAMPLES_BUTTONS_QTD=3
CONFIG_EXAMPLES_PWM=y
CONFIG_HAVE_CXX=y
CONFIG_HAVE_CXXINITIALIZE=y
CONFIG_INIT_ENTRYPOINT="nsh_main"
CONFIG_INPUT=y
CONFIG_INPUT_BUTTONS=y
CONFIG_INPUT_BUTTONS_LOWER=y
CONFIG_INTELHEX_BINARY=y
CONFIG_NSH_ARCHINIT=y
CONFIG_NSH_BUILTIN_APPS=y
CONFIG_NSH_FILEIOSIZE=512
CONFIG_NSH_LINELEN=64
CONFIG_NSH_READLINE=y
CONFIG_PREALLOC_TIMERS=4
CONFIG_PWM=y
CONFIG_RAM_SIZE=98304
CONFIG_RAM_START=0x20000000
CONFIG_RAW_BINARY=y
CONFIG_RR_INTERVAL=200
CONFIG_SCHED_WAITPID=y
CONFIG_SPI=y
CONFIG_START_DAY=5
CONFIG_START_MONTH=5
CONFIG_START_YEAR=2014
CONFIG_STM32_JTAG_SW_ENABLE=y
CONFIG_STM32_OTGFS=y
CONFIG_STM32_PWR=y
CONFIG_STM32_TIM3=y
CONFIG_STM32_TIM3_CH1OUT=y
CONFIG_STM32_TIM3_PWM=y
CONFIG_STM32_USART6=y
CONFIG_SYSTEM_NSH=y
CONFIG_TASK_NAME_SIZE=0
CONFIG_USBDEV=y

8
boards/arm/stm32/stm32f401rc-rs485/include/board.h
View File

@ -282,6 +282,14 @@ extern "C"
#define GPIO_USART6_RX GPIO_USART6_RX_1 /* PC7 */
#define GPIO_USART6_TX GPIO_USART6_TX_1 /* PC6 */
/* PWM
*
* The STM32F401RC-RS485 has no real on-board PWM devices, but the board
* can be configured to output a pulse train using TIM3 CH1 on PA6.
*/
#define GPIO_TIM3_CH1OUT GPIO_TIM3_CH1OUT_1
/* I2C
*
* The optional _GPIO configurations allow the I2C driver to manually

4
boards/arm/stm32/stm32f401rc-rs485/src/CMakeLists.txt
View File

@ -52,6 +52,10 @@ if(CONFIG_STM32_CONFIG_I2C_EE_24XXEEPROM)
list(APPEND SRCS stm32_at24.c)
endif()
if(CONFIG_STM32_PWM)
list(APPEND SRCS stm32_pwm.c)
endif()
target_sources(board PRIVATE ${SRCS})
if(CONFIG_ARCH_CHIP_STM32F401RC)

4
boards/arm/stm32/stm32f401rc-rs485/src/Make.defs
View File

@ -55,6 +55,10 @@ ifeq ($(CONFIG_I2C_EE_24XX),y)
CSRCS += stm32_at24.c
endif
ifeq ($(CONFIG_STM32_PWM),y)
CSRCS += stm32_pwm.c
endif
DEPPATH += --dep-path board
VPATH += :board
CFLAGS += ${INCDIR_PREFIX}$(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src$(DELIM)board$(DELIM)board

10
boards/arm/stm32/stm32f401rc-rs485/src/stm32_bringup.c
View File

@ -179,6 +179,16 @@ int stm32_bringup(void)
}
#endif
#ifdef CONFIG_PWM
/* Initialize PWM and register the PWM device */
ret = stm32_pwm_setup();
if (ret < 0)
{
syslog(LOG_ERR, "ERROR: stm32_pwm_setup() failed: %d\n", ret);
}
#endif
#ifdef HAVE_SDIO
/* Initialize the SDIO block driver */

119
boards/arm/stm32/stm32f401rc-rs485/src/stm32_pwm.c Normal file
View File

@ -0,0 +1,119 @@
/****************************************************************************
* boards/arm/stm32/stm32f401rc-rs485/src/stm32_pwm.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 <errno.h>
#include <debug.h>
#include <nuttx/timers/pwm.h>
#include <arch/board/board.h>
#include "chip.h"
#include "arm_internal.h"
#include "stm32_pwm.h"
#include "stm32f401rc-rs485.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* PWM
*
* The STM32F401RC-RS485 has no real on-board PWM devices, but the board can
* be configured to output a pulse train using TIM3 CH1.
*
*/
#define HAVE_PWM 1
#ifndef CONFIG_PWM
# undef HAVE_PWM
#endif
#ifndef CONFIG_STM32_TIM3
# undef HAVE_PWM
#endif
#ifndef CONFIG_STM32_TIM3_PWM
# undef HAVE_PWM
#endif
#if !defined(CONFIG_STM32_TIM3_CHANNEL) || CONFIG_STM32_TIM3_CHANNEL != STM32F401RCRS485_PWMCHANNEL
# undef HAVE_PWM
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: stm32_pwm_setup
*
* Description:
* Initialize PWM and register the PWM device.
*
****************************************************************************/
int stm32_pwm_setup(void)
{
#ifdef HAVE_PWM
static bool initialized = false;
struct pwm_lowerhalf_s *pwm;
int ret;
/* Have we already initialized? */
if (!initialized)
{
/* Call stm32_pwminitialize() to get an instance of the PWM interface */
pwm = stm32_pwminitialize(STM32F401RCRS485_PWMTIMER);
if (!pwm)
{
aerr("ERROR: Failed to get the STM32 PWM lower half\n");
return -ENODEV;
}
/* Register the PWM driver at "/dev/pwm0" */
ret = pwm_register("/dev/pwm0", pwm);
if (ret < 0)
{
aerr("ERROR: pwm_register failed: %d\n", ret);
return ret;
}
/* Now we are initialized */
initialized = true;
}
return OK;
#else
return -ENODEV;
#endif
}

24
boards/arm/stm32/stm32f401rc-rs485/src/stm32f401rc-rs485.h
View File

@ -113,6 +113,15 @@
GPIO_OUTPUT_SET | GPIO_PORTB | GPIO_PIN5)
#endif
/* PWM
*
* The STM32F401RC-RS485 has no real on-board PWM devices, but the board can
* be configured to output a pulse train using TIM3 CH1 on PA6.
*/
#define STM32F401RCRS485_PWMTIMER 3
#define STM32F401RCRS485_PWMCHANNEL 1
/****************************************************************************
* Public Data
****************************************************************************/
@ -185,6 +194,21 @@ void stm32_usbinitialize(void);
int stm32_adc_setup(void);
#endif
/****************************************************************************
* Name: stm32_pwm_setup
*
* Description:
* Initialize PWM and register the PWM device.
*
* Return Value:
* OK on success; a negated errno value on failure.
*
****************************************************************************/
#ifdef CONFIG_PWM
int stm32_pwm_setup(void);
#endif
/****************************************************************************
* Name: stm32_sdio_initialize
*