boards/arm/stm32/stm32f4discovery/src: Add support for external DS1307 module.
This commit is contained in:
Alan Carvalho de Assis
Gregory Nutt
parent
c123967fe9
commit
8eafe880dc
@ -38,6 +38,7 @@ Contents
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- Quadrature Encoder
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- FPU
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- STM32F4DIS-BB
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- RTC DS1307
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- SSD1289
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- UG-2864AMBAG01 / UG-2864HSWEG01
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- HCI UART
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@ -417,6 +418,52 @@ On-board PIO usage:
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PC10 DAT2
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---------- ------------- ------------------------------
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RTC DS1307
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==========
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It is possible to use a low cost extern DS1307 RTC to keep date and time
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always updated. These DS1307 RTC modules come with a 3V button battery, then
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even when the board is turned OFF the Date/Time registers keep running.
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You can connect the module this way (STM32F4Discovery to DS1307 board): GND
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to GND; 5V to VCC; PB9 to SDA; PB6 to SCL. In the NuttX menuconfig you need
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to enable these options:
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System Type --->
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STM32 Peripheral Support --->
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[*] I2C1
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Device Drivers --->
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Timer Driver Support --->
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[*] RTC Driver Support --->
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-*- Date/Time RTC Support
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[*] External RTC Support
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[*] DS130x/DS323x RTC Driver
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Maxim Integrated RTC (DS1307) --->
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(100000) DS1307/DS323x I2C frequency
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Application Configuration --->
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NSH Library --->
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Disable Individual commands --->
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[ ] Disable date ( <-- Deselect )
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It is also a good idea to enable the DEBUG to RTC initially, you will see:
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ABCDF
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stm32_ds1307_init: Initialize I2C1
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stm32_ds1307_init: Bind the DS1307 RTC driver to I2C1
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rtc_dumptime: Returning:
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rtc_dumptime: tm_sec: 00000039
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rtc_dumptime: tm_min: 00000001
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rtc_dumptime: tm_hour: 00000009
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rtc_dumptime: tm_mday: 00000016
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rtc_dumptime: tm_mon: 00000008
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rtc_dumptime: tm_year: 00000077
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NuttShell (NSH)
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nsh> date
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Sep 22 09:01:58 2019
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SSD1289
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=======
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@ -125,6 +125,10 @@ ifeq ($(CONFIG_RGBLED),y)
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CSRCS += stm32_rgbled.c
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endif
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ifeq ($(CONFIG_RTC_DS1307),y)
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CSRCS += stm32_ds1307.c
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endif
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ifeq ($(CONFIG_PWM),y)
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CSRCS += stm32_pwm.c
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endif
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@ -329,6 +329,15 @@ int stm32_bringup(void)
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}
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#endif
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#ifdef CONFIG_RTC_DS1307
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ret = stm32_ds1307_init();
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if (ret < 0)
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{
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syslog(LOG_ERR, "Failed to initialize DS1307 RTC driver: %d\n", ret);
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return ret;
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}
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#endif
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#ifdef HAVE_RTC_DRIVER
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/* Instantiate the STM32 lower-half RTC driver */
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128
boards/arm/stm32/stm32f4discovery/src/stm32_ds1307.c
Normal file
128
boards/arm/stm32/stm32f4discovery/src/stm32_ds1307.c
Normal file
@ -0,0 +1,128 @@
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/****************************************************************************
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* boards/arm/stm32/stm32f4discovery/src/stm32_ds1307.c
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*
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* Copyright (C) 2019 Alan Carvalho de Assis. All rights reserved.
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* Author: Alan Carvalho de Assis <acassis@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/i2c/i2c_master.h>
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#include <nuttx/timers/rtc.h>
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#include <nuttx/timers/ds3231.h>
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#include "stm32.h"
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#include "stm32_i2c.h"
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#include "stm32f4discovery.h"
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#if defined(CONFIG_I2C) && defined(CONFIG_RTC_DS1307)
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define DS1307_I2C_ADDR 0x6f /* DS1307 I2C Address */
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#define DS1307_I2C_BUS 1 /* DS1307 is on I2C1 */
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stm32_ds1307_init
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*
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* Description:
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* Initialize and configure the DS1307 RTC
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*
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****************************************************************************/
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int stm32_ds1307_init(void)
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{
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FAR struct i2c_master_s *i2c;
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static bool initialized = false;
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int ret;
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/* Have we already initialized? */
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if (!initialized)
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{
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/* No.. Get the I2C bus driver */
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rtcinfo("Initialize I2C%d\n", DS1307_I2C_BUS);
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i2c = stm32_i2cbus_initialize(DS1307_I2C_BUS);
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if (!i2c)
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{
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rtcerr("ERROR: Failed to initialize I2C%d\n", DS1307_I2C_BUS);
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return -ENODEV;
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}
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/* Now bind the I2C interface to the DS1307 RTC driver */
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rtcinfo("Bind the DS1307 RTC driver to I2C%d\n", DS1307_I2C_BUS);
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ret = dsxxxx_rtc_initialize(i2c);
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if (ret < 0)
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{
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rtcerr("ERROR: Failed to bind I2C%d to the DS1307 RTC driver\n",
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DS1307_I2C_BUS);
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return -ENODEV;
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}
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#ifdef CONFIG_I2C_DRIVER
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/* Register the I2C to get the "nsh> i2c bus" command working */
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ret = i2c_register(i2c, DS1307_I2C_BUS);
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if (ret < 0)
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{
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rtcerr("ERROR: Failed to register I2C%d driver: %d\n", bus, ret);
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return -ENODEV;
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}
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#endif
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/* Synchronize the system time to the RTC time */
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clock_synchronize();
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/* Now we are initialized */
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initialized = true;
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}
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return OK;
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}
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#endif /* CONFIG_I2C && CONFIG_RTC_DS1307 */
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@ -216,6 +216,7 @@
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#endif
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/* STM32F4 Discovery GPIOs **************************************************/
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/* LEDs */
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#define GPIO_LED1 (GPIO_OUTPUT|GPIO_PUSHPULL|GPIO_SPEED_50MHz|\
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@ -497,6 +498,18 @@ int nunchuck_initialize(FAR char *devname);
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int stm32_max7219init(FAR const char *devpath);
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#endif
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/****************************************************************************
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* Name: stm32_ds1307_init
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*
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* Description:
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* Initialize and register the DS1307 RTC
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*
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****************************************************************************/
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#ifdef CONFIG_RTC_DS1307
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int stm32_ds1307_init(void);
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#endif
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/****************************************************************************
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* Name: stm32_st7032init
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*
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