STM32 PVD: Adds support for STM32's Programmable Voltage Detector feature. I put register access behind CONFIG_STM32_ENERGYLITE as have not checked F1/F2/F4 etc. manuals. Tested on STM32L1. PVD interrupt looks generic, at least #defines it needs are in headers for every chip variant. By Dmitry Nikolaev, submitted by Juha Niskanen.
This commit is contained in:
Gregory Nutt
parent
55ac01399b
commit
398c7757e3
@ -177,7 +177,7 @@ CHIP_CSRCS += stm32_eth.c
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endif
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ifeq ($(CONFIG_STM32_PWR),y)
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CHIP_CSRCS += stm32_pwr.c
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CHIP_CSRCS += stm32_pwr.c stm32_exti_pwr.c
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endif
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ifeq ($(CONFIG_RTC),y)
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@ -73,7 +73,7 @@
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# define PWR_CR_1p9V (0 << PWR_CR_PLS_SHIFT) /* 000: 1.9 V */
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# define PWR_CR_2p1V (1 << PWR_CR_PLS_SHIFT) /* 001: 2.1 V */
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# define PWR_CR_2p3V (2 << PWR_CR_PLS_SHIFT) /* 010: 2.3 V */
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# define PWR_CR_2pvV (3 << PWR_CR_PLS_SHIFT) /* 011: 2.5 V */
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# define PWR_CR_2p5V (3 << PWR_CR_PLS_SHIFT) /* 011: 2.5 V */
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# define PWR_CR_2p7V (4 << PWR_CR_PLS_SHIFT) /* 100: 2.7 V */
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# define PWR_CR_2p9V (5 << PWR_CR_PLS_SHIFT) /* 101: 2.9 V */
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# define PWR_CR_3p1V (6 << PWR_CR_PLS_SHIFT) /* 110: 3.1 V */
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169
arch/arm/src/stm32/stm32_exti_pwr.c
Normal file
169
arch/arm/src/stm32/stm32_exti_pwr.c
Normal file
@ -0,0 +1,169 @@
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/****************************************************************************
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* arch/arm/src/stm32/stm32_exti_pwr.c
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*
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* Copyright (C) 2009, 2011-2012, 2015 Gregory Nutt. All rights reserved.
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* Copyright (C) 2015 Haltian Ltd. All rights reserved.
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* Authors: Gregory Nutt <gnutt@nuttx.org>
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* Dmitry Nikolaev <dmitry.nikolaev@haltian.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 <nuttx/irq.h>
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#include <nuttx/arch.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <errno.h>
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#include <arch/irq.h>
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#include "up_arch.h"
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#include "chip.h"
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#include "stm32_gpio.h"
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#include "stm32_exti.h"
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#include "stm32_exti_pwr.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* Interrupt handlers attached to the PVD EXTI */
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static xcpt_t stm32_exti_pvd_callback;
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stm32_exti_pvd_isr
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*
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* Description:
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* EXTI PVD interrupt service routine/dispatcher
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*
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****************************************************************************/
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static int stm32_exti_pvd_isr(int irq, void *context)
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{
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int ret = OK;
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/* Clear the pending EXTI interrupt */
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putreg32(EXTI_PVD_LINE, STM32_EXTI_PR);
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/* And dispatch the interrupt to the handler */
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if (stm32_exti_pvd_callback)
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{
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ret = stm32_exti_pvd_callback(irq, context);
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}
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return ret;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stm32_exti_pvd
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*
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* Description:
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* Sets/clears EXTI PVD interrupt.
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*
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* Parameters:
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* - rising/falling edge: enables interrupt on rising/falling edge
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* - event: generate event when set
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* - func: when non-NULL, generate interrupt
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*
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* Returns:
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* The previous value of the interrupt handler function pointer. This
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* value may, for example, be used to restore the previous handler when
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* multiple handlers are used.
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*
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****************************************************************************/
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xcpt_t stm32_exti_pvd(bool risingedge, bool fallingedge, bool event,
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xcpt_t func)
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{
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xcpt_t oldhandler;
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/* Get the previous GPIO IRQ handler; Save the new IRQ handler. */
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oldhandler = stm32_exti_pvd_callback;
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stm32_exti_pvd_callback = func;
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/* Install external interrupt handlers (if not already attached) */
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if (func)
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{
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irq_attach(STM32_IRQ_PVD, stm32_exti_pvd_isr);
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up_enable_irq(STM32_IRQ_PVD);
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}
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else
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{
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up_disable_irq(STM32_IRQ_PVD);
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}
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/* Configure rising/falling edges */
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modifyreg32(STM32_EXTI_RTSR,
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risingedge ? 0 : EXTI_PVD_LINE,
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risingedge ? EXTI_PVD_LINE : 0);
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modifyreg32(STM32_EXTI_FTSR,
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fallingedge ? 0 : EXTI_PVD_LINE,
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fallingedge ? EXTI_PVD_LINE : 0);
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/* Enable Events and Interrupts */
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modifyreg32(STM32_EXTI_EMR,
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event ? 0 : EXTI_PVD_LINE,
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event ? EXTI_PVD_LINE : 0);
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modifyreg32(STM32_EXTI_IMR,
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func ? 0 : EXTI_PVD_LINE,
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func ? EXTI_PVD_LINE : 0);
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/* Return the old IRQ handler */
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return oldhandler;
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}
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71
arch/arm/src/stm32/stm32_exti_pwr.h
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71
arch/arm/src/stm32/stm32_exti_pwr.h
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@ -0,0 +1,71 @@
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/****************************************************************************
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* arch/arm/src/stm32/stm32_exti_pwr.h
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*
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* Copyright (C) 2015 Haltian Ltd. All rights reserved.
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* Authors: Dmitry Nikolaev <dmitry.nikolaev@haltian.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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#ifndef STM32_EXTI_PWR_H_
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#define STM32_EXTI_PWR_H_
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdbool.h>
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#include <nuttx/irq.h>
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: stm32_exti_pvd
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*
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* Description:
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* Sets/clears EXTI PVD interrupt.
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*
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* Parameters:
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* - rising/falling edge: enables interrupt on rising/falling edge
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* - event: generate event when set
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* - func: when non-NULL, generate interrupt
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*
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* Returns:
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* The previous value of the interrupt handler function pointer. This
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* value may, for example, be used to restore the previous handler when
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* multiple handlers are used.
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*
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****************************************************************************/
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xcpt_t stm32_exti_pvd(bool risingedge, bool fallingedge, bool event,
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xcpt_t func);
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#endif /* STM32_EXTI_PWR_H_ */
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0
arch/arm/src/stm32/stm32_iwdg.c
Executable file → Normal file
0
arch/arm/src/stm32/stm32_iwdg.c
Executable file → Normal file
@ -167,7 +167,7 @@ void stm32_pwr_enablebreg(bool regon)
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* Name: stm32_pwr_setvos
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*
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* Description:
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* Set voltage scaling for EneryLite devices.
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* Set voltage scaling for EnergyLite devices.
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*
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* Input Parameters:
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* vos - Properly aligned voltage scaling select bits for the PWR_CR register.
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@ -204,6 +204,71 @@ void stm32_pwr_setvos(uint16_t vos)
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while ((stm32_pwr_getreg(STM32_PWR_CSR_OFFSET) & PWR_CSR_VOSF) != 0);
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}
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#endif
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/************************************************************************************
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* Name: stm32_pwr_setpvd
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*
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* Description:
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* Sets power voltage detector
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*
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* Input Parameters:
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* pls - PVD level
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*
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* Returned Values:
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* None
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*
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* Assumptions:
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* At present, this function is called only from initialization logic. If used
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* for any other purpose that protection to assure that its operation is atomic
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* will be required.
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*
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************************************************************************************/
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void stm32_pwr_setpvd(uint16_t pls)
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{
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uint16_t regval;
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/* Set PLS */
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regval = stm32_pwr_getreg(STM32_PWR_CR_OFFSET);
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regval &= ~PWR_CR_PLS_MASK;
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regval |= (pls & PWR_CR_PLS_MASK);
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/* Write value to register */
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stm32_pwr_putreg(STM32_PWR_CR_OFFSET, regval);
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}
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/************************************************************************************
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* Name: stm32_pwr_enablepvd
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*
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* Description:
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* Enable the Programmable Voltage Detector
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*
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************************************************************************************/
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void stm32_pwr_enablepvd(void)
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{
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/* Enable PVD by setting the PVDE bit in PWR_CR register. */
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stm32_pwr_modifyreg(STM32_PWR_CR_OFFSET, 0, PWR_CR_PVDE);
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}
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/************************************************************************************
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* Name: stm32_pwr_disablepvd
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*
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* Description:
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* Disable the Programmable Voltage Detector
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*
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************************************************************************************/
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void stm32_pwr_disablepvd(void)
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{
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/* Disable PVD by clearing the PVDE bit in PWR_CR register. */
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stm32_pwr_modifyreg(STM32_PWR_CR_OFFSET, PWR_CR_PVDE, 0);
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}
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#endif /* CONFIG_STM32_ENERGYLITE */
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#endif /* CONFIG_STM32_PWR */
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@ -112,7 +112,7 @@ void stm32_pwr_enablebreg(bool regon);
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* Name: stm32_pwr_setvos
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*
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* Description:
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* Set voltage scaling for EneryLite devices.
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* Set voltage scaling for EnergyLite devices.
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*
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* Input Parameters:
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* vos - Properly aligned voltage scaling select bits for the PWR_CR register.
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@ -129,7 +129,47 @@ void stm32_pwr_enablebreg(bool regon);
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#ifdef CONFIG_STM32_ENERGYLITE
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void stm32_pwr_setvos(uint16_t vos);
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#endif
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/************************************************************************************
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* Name: stm32_pwr_setpvd
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*
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* Description:
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* Sets power voltage detector for EnergyLite devices.
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*
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* Input Parameters:
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* pls - PVD level
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*
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* Returned Values:
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* None
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*
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* Assumptions:
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* At present, this function is called only from initialization logic.
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*
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************************************************************************************/
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void stm32_pwr_setpvd(uint16_t pls);
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/************************************************************************************
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* Name: stm32_pwr_enablepvd
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*
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* Description:
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* Enable the Programmable Voltage Detector
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*
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************************************************************************************/
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void stm32_pwr_enablepvd(void);
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/************************************************************************************
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* Name: stm32_pwr_disablepvd
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*
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* Description:
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* Disable the Programmable Voltage Detector
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*
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************************************************************************************/
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void stm32_pwr_disablepvd(void);
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#endif /* CONFIG_STM32_ENERGYLITE */
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#undef EXTERN
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#if defined(__cplusplus)
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Block a user