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drivers/timers/mcp7941x.c: Add support for the MCP741x external RTC.
This commit is contained in:
Ouss4
Gregory Nutt
+19
-1
@@ -211,7 +211,7 @@ config RTC_PCF85263
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select RTC_DATETIME
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select RTC_DATETIME
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depends on RTC_EXTERNAL
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depends on RTC_EXTERNAL
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---help---
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---help---
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Enables support for the Maxim Integrated DS3231 I2C RTC timer.
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Enables support for the NXP PCF85263 I2C RTC timer.
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if RTC_PCF85263
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if RTC_PCF85263
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@@ -221,6 +221,24 @@ config PCF85263_I2C_FREQUENCY
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range 1 400000
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range 1 400000
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endif # RTC_PCF85263
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endif # RTC_PCF85263
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config RTC_MCP7941X
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bool "MCP7941X RTC Driver"
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default n
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select I2C
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select RTC_DATETIME
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depends on RTC_EXTERNAL
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---help---
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Enables support for the Microchip MCP7941X I2C RTC timer.
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if RTC_MCP7941X
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config MCP7941X_I2C_FREQUENCY
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int "MCP7941X I2C frequency"
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default 400000
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range 1 400000
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endif # RTC_MCP7941X
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endif # RTC
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endif # RTC
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menuconfig WATCHDOG
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menuconfig WATCHDOG
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@@ -81,6 +81,12 @@ ifeq ($(CONFIG_RTC_PCF85263),y)
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TMRVPATH = :timers
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TMRVPATH = :timers
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endif
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endif
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ifeq ($(CONFIG_RTC_MCP7941X),y)
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CSRCS += mcp7941x.c
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TMRDEPPATH = --dep-path timers
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TMRVPATH = :timers
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endif
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ifeq ($(CONFIG_RTC_ARCH),y)
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ifeq ($(CONFIG_RTC_ARCH),y)
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CSRCS += arch_rtc.c
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CSRCS += arch_rtc.c
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TMRDEPPATH = --dep-path timers
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TMRDEPPATH = --dep-path timers
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File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,94 @@
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/****************************************************************************
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* drivers/timers/mcp7941x.h
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*
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* Copyright (C) 2019 Abdelatif Guettouche. All rights reserved.
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* Author: 2019 Abdelatif Guettouche <abdelatif.guettouche@gmail.com>
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*
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* This file is a part of NuttX:
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*
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* Copyright (C) 2019 Gregory Nutt. All rights reserved.
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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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#ifndef __DRIVERS_TIMERS_MCP7941X_H
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#define __DRIVERS_TIMERS_MCP7941X_H
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define MCP7941X_REG_TIME_SEC 0x00 /* Seconds register. */
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# define MCP7941X_TIME_SEC_10SEC (7 << 4)
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# define MCP7941X_TIME_SEC_ST (1 << 7)
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# define MCP7941X_TIME_SEC_BCDMASK 0x7F
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#define MCP7941X_REG_TIME_MIN 0x01 /* Minutes register. */
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# define MCP7941X_TIME_MIN_10MIN (7 << 4)
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# define MCP7941X_TIME_MIN_BCDMASK 0x7F
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#define MCP7941X_REG_TIME_HOUR 0x02 /* Hours register. */
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# define MCP7941X_TIME_HOUR_10HOUR (3 << 4)
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# define MCP7941X_TIME_HOUR_AMPM (1 << 5)
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# define MCP7941X_TIME_HOUR_1224 (1 << 6)
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# define MCP7941X_TIME_HOUR_BCDMASK 0x3F
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#define MCP7941X_REG_TIME_DAY 0x03 /* Day register. */
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# define MCP7941X_TIME_DAY_VBATEN (1 << 3)
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# define MCP7941X_TIME_DAY_VBAT (1 << 4)
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# define MCP7941X_TIME_DAY_OSCON (1 << 5)
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# define MCP7941X_TIME_DAY_BCDMASK 0x07
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#define MCP7941X_REG_TIME_DATE 0x04 /* Date register. */
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# define MCP7941X_TIME_DATE_10DATE (3 << 4)
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# define MCP7941X_TIME_DATE_BCDMASK 0x3F
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#define MCP7941X_REG_TIME_MONTH 0x05 /* Month register. */
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# define MCP7941X_TIME_MONTH_10MONTH (1 << 4)
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# define MCP7941X_TIME_MONTH_LP (1 << 5)
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# define MCP7941X_TIME_MONTH_BCDMASK 0x1F
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#define MCP7941X_REG_TIME_YEAR 0x06 /* Year register. */
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# define MCP7941X_TIME_YEAR_10YEAR (15 << 4)
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# define MCP7941X_TIME_YEAR_BCDMASK 0xFF
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#define MCP7941X_REG_CTRL 0x07 /* Control register. */
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# define MCP7941X_CTRL_RS0 (1 << 0)
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# define MCP7941X_CTRL_RS1 (1 << 1)
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# define MCP7941X_CTRL_RS2 (1 << 2)
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# define MCP7941X_CTRL_EXTOSC (1 << 3)
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# define MCP7941X_CTRL_ALM0 (1 << 4)
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# define MCP7941X_CTRL_ALM1 (1 << 5)
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# define MCP7941X_CTRL_SQWE (1 << 6)
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# define MCP7941X_CTRL_OUT (1 << 7)
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#define MCP7941X_REG_CALIB 0x08 /* Calibration register. */
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#define MCP7941X_REG_ID 0x09 /* ID register. */
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#endif /* __DRIVERS_TIMERS_MCP7941X_H */
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@@ -0,0 +1,97 @@
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/****************************************************************************
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* include/nuttx/timers/mcp7941x.h
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*
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* Copyright (C) 2019 Abdelatif Guettouche. All rights reserved.
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* Author: 2019 Abdelatif Guettouche <abdelatif.guettouche@gmail.com>
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*
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* This file is a part of NuttX:
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*
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* Copyright (C) 2019 Gregory Nutt. All rights reserved.
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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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#ifndef __INCLUDE_NUTTX_TIMERS_MCP7941X_H
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#define __INCLUDE_NUTTX_TIMERS_MCP7941X_H
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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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#ifdef CONFIG_RTC_MCP7941X
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Name: mcp7941x_rtc_initialize
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*
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* Description:
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* Initialize the hardware RTC per the selected configuration. This
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* function is called once during the OS initialization sequence by board-
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* specific logic.
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*
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* After mcp7941x_rtc_initialize() is called, the OS function
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* clock_synchronize() should also be called to synchronize the system
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* timer to a hardware RTC. That operation is normally performed
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* automatically by the system during clock initialization. However, when
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* an external RTC is used, the board logic will need to explicitly re-
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* synchronize the system timer to the RTC when the RTC becomes available.
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*
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* Input Parameters:
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* i2c - An instance of the I2C interface used to access the MCP7941x
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* device
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* addr - The (7-bit) I2C address of the MCP7941x device
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno on failure
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*
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****************************************************************************/
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struct i2c_master_s; /* Forward reference */
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int mcp7941x_rtc_initialize(FAR struct i2c_master_s *i2c, uint8_t addr);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* CONFIG_RTC_MCP7941X */
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#endif /* __INCLUDE_NUTTX_TIMERS_MCP7941X_H */
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