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stm32f401rc-rs485: Add eeprom support

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This commit is contained in:
Rodrigo Sim 2023-12-03 20:42:56 -03:00 • committed by Xiang Xiao
parent e0df6dd22e
commit ce4c70690f
7 changed files with 216 additions and 10 deletions
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25
Documentation/platforms/arm/stm32f4/boards/stm32f401rc-rs485/index.rst
View file

@ -126,6 +126,31 @@ SDA PB7
SCL PB8
====== =====
Users can enable EERPOM support on STM32F4-RS485 by following below configuration:
- Configure basic nsh::
./tools/configure.sh -l stm32f401rc-rs485:nsh
- Enable the following configs::
CONFIG_DEV_ZERO=y
CONFIG_EEPROM=y
CONFIG_FS_PROCFS=y
CONFIG_I2C=y
CONFIG_I2C_EE_24XX=y
CONFIG_STM32_I2C1=y
- Build and flash the STM32F4-RS485.
- Use dd command to write and read data from EEPROM as below::
nsh> dd if=/dev/zero of=/dev/eeprom
nsh: dd: write failed: 1
nsh> dd if=/dev/console of=/dev/eeprom bs=1 count=4
(type "Hello")
nsh> dd if=/dev/eeprom of=/dev/console bs=4 count=1
Hellonsh>
Temperature Sensor
==================

12
boards/arm/stm32/stm32f401rc-rs485/include/board.h
View file

@ -306,18 +306,10 @@ extern "C"
*/
#define GPIO_I2C1_SCL GPIO_I2C1_SCL_2
#define GPIO_I2C1_SDA GPIO_I2C1_SDA_2
#define GPIO_I2C1_SCL_GPIO \
(GPIO_OUTPUT|GPIO_OPENDRAIN|GPIO_SPEED_50MHz|GPIO_OUTPUT_SET|GPIO_PORTB|GPIO_PIN8)
#define GPIO_I2C1_SDA_GPIO \
(GPIO_OUTPUT|GPIO_OPENDRAIN|GPIO_SPEED_50MHz|GPIO_OUTPUT_SET|GPIO_PORTB|GPIO_PIN9)
#define GPIO_I2C1_SDA GPIO_I2C1_SDA_1
#define GPIO_I2C2_SCL GPIO_I2C2_SCL_1
#define GPIO_I2C2_SDA GPIO_I2C2_SDA_1
#define GPIO_I2C2_SCL_GPIO \
(GPIO_OUTPUT|GPIO_OPENDRAIN|GPIO_SPEED_50MHz|GPIO_OUTPUT_SET|GPIO_PORTB|GPIO_PIN10)
#define GPIO_I2C2_SDA_GPIO \
(GPIO_OUTPUT|GPIO_OPENDRAIN|GPIO_SPEED_50MHz|GPIO_OUTPUT_SET|GPIO_PORTB|GPIO_PIN11)
#define GPIO_I2C2_SDA GPIO_I2C2_SDA_2
/* SPI
*

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

@ -40,6 +40,10 @@ if(CONFIG_STM32_SDIO)
list(APPEND SRCS stm32_sdio.c)
endif()
if(CONFIG_STM32_CONFIG_I2C_EE_24XXEEPROM)
list(APPEND SRCS stm32_at24.c)
endif()
target_sources(board PRIVATE ${SRCS})
if(CONFIG_ARCH_CHIP_STM32F401RC)

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

@ -43,6 +43,10 @@ ifeq ($(CONFIG_STM32_SDIO),y)
CSRCS += stm32_sdio.c
endif
ifeq ($(CONFIG_I2C_EE_24XX),y)
CSRCS += stm32_at24.c
endif
DEPPATH += --dep-path board
VPATH += :board
CFLAGS += ${INCDIR_PREFIX}$(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src$(DELIM)board$(DELIM)board

95
boards/arm/stm32/stm32f401rc-rs485/src/stm32_at24.c Normal file
View file

@ -0,0 +1,95 @@
/****************************************************************************
* boards/arm/stm32/stm32f401rc-rs485/src/stm32_at24.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/mount.h>
#include <stdbool.h>
#include <stdio.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/i2c/i2c_master.h>
#include <nuttx/eeprom/i2c_xx24xx.h>
#include "stm32f401rc-rs485.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define AT24_I2C_BUS 1 /* EEPROM chip is configured to use I2C1 */
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: stm32_at24_init
*
* Description:
* Initialize and configure the AT24 serial EEPROM
*
****************************************************************************/
int stm32_at24_init(char *path)
{
FAR struct i2c_master_s *i2c;
static bool initialized = false;
int ret;
/* Have we already initialized? */
if (!initialized)
{
/* No.. Get the I2C bus driver */
finfo("Initialize I2C%d\n", AT24_I2C_BUS);
i2c = stm32_i2cbus_initialize(AT24_I2C_BUS);
if (!i2c)
{
ferr("ERROR: Failed to initialize I2C%d\n", AT24_I2C_BUS);
return -ENODEV;
}
/* Now bind the I2C interface to the AT24 I2C EEPROM driver */
finfo("Bind the AT24 EEPROM driver to I2C%d\n", AT24_I2C_BUS);
ret = ee24xx_initialize(i2c, 0x50, path, EEPROM_AT24CM02, false);
if (ret < 0)
{
ferr("ERROR: Failed to bind I2C%d to the AT24 EEPROM driver\n",
AT24_I2C_BUS);
return -ENODEV;
}
/* Now we are initialized */
initialized = true;
}
return OK;
}

66
boards/arm/stm32/stm32f401rc-rs485/src/stm32_bringup.c
View file

@ -51,6 +51,59 @@
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: stm32_i2c_register
*
* Description:
* Register one I2C drivers for the I2C tool.
*
****************************************************************************/
#if defined(CONFIG_I2C) && defined(CONFIG_SYSTEM_I2CTOOL)
static void stm32_i2c_register(int bus)
{
struct i2c_master_s *i2c;
int ret;
i2c = stm32_i2cbus_initialize(bus);
if (i2c == NULL)
{
syslog(LOG_ERR, "ERROR: Failed to get I2C%d interface\n", bus);
}
else
{
ret = i2c_register(i2c, bus);
if (ret < 0)
{
syslog(LOG_ERR, "ERROR: Failed to register I2C%d driver: %d\n",
bus, ret);
stm32_i2cbus_uninitialize(i2c);
}
}
}
#endif
/****************************************************************************
* Name: stm32_i2ctool
*
* Description:
* Register I2C drivers for the I2C tool.
*
****************************************************************************/
#if defined(CONFIG_I2C) && defined(CONFIG_SYSTEM_I2CTOOL)
static void stm32_i2ctool(void)
{
stm32_i2c_register(1);
#if 0
stm32_i2c_register(1);
stm32_i2c_register(2);
#endif
}
#else
# define stm32_i2ctool()
#endif
/****************************************************************************
* Name: stm32_bringup
*
@ -79,6 +132,19 @@ int stm32_bringup(void)
}
#endif
#if defined(CONFIG_I2C) && defined(CONFIG_SYSTEM_I2CTOOL)
stm32_i2ctool();
#endif
#ifdef CONFIG_I2C_EE_24XX
ret = stm32_at24_init("/dev/eeprom");
if (ret < 0)
{
syslog(LOG_ERR, "Failed to initialize EEPROM HX24LCXXB: %d\n", ret);
return ret;
}
#endif
#ifdef CONFIG_INPUT_BUTTONS
/* Register the BUTTON driver */

20
boards/arm/stm32/stm32f401rc-rs485/src/stm32f401rc-rs485.h
View file

@ -346,4 +346,24 @@ int stm32_mcp2515initialize(const char *devpath);
int stm32_sdio_initialize(void);
#endif
/****************************************************************************
* Name: stm32_i2cbus_initialize
*
* Description:
* Initialize one I2C bus
*
****************************************************************************/
struct i2c_master_s *stm32_i2cbus_initialize(int port);
/****************************************************************************
* Name: stm32_at24_init
*
* Description:
* Initialize and register the EEPROM for 24XX driver.
*
****************************************************************************/
int stm32_at24_init(char *path);
#endif /* __BOARDS_ARM_STM32_STM32F401RC_RS485_SRC_STM32F401RC_RS485_H */