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stm32l4: pwr: basic core functionality

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Only support for voltage range setting.

Signed-off-by: Karl Palsson <karlp@tweak.net.au>
This commit is contained in:
benjaminlevine 2016-03-13 00:00:36 +00:00 committed by Karl Palsson
parent 326899b05b
commit d60fd7ca94
3 changed files with 57 additions and 2 deletions
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2
include/libopencm3/stm32/l4/pwr.h
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@ -169,7 +169,7 @@ enum pwr_vos_scale {
BEGIN_DECLS
/* TODO */
void pwr_set_vos_scale(enum pwr_vos_scale scale);
END_DECLS

2
lib/stm32/l4/Makefile
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@ -37,7 +37,7 @@ TGT_CFLAGS += $(DEBUG_FLAGS)
ARFLAGS = rcs
# Specific objs
OBJS = adc.o
OBJS = adc.o pwr.o
# common/shared objs
OBJS += rcc_common_all.o

55
lib/stm32/l4/pwr.c Normal file
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@ -0,0 +1,55 @@
/** @defgroup pwr_file PWR
*
* @ingroup STM32L4xx
*
* @brief <b>libopencm3 STM32L4xx Power Control</b>
*
* @version 1.0.0
*
* @author @htmlonly &copy; @endhtmlonly 2016 Benjamin Levine <benjamin@jesco.karoo.co.uk>
*
* @date 4 March 2013
*
* This library supports the power control system for the
* STM32L4 series of ARM Cortex Microcontrollers by ST Microelectronics.
*
* LGPL License Terms @ref lgpl_license
*/
/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2016 Benjamin Levine <benjamin@jesco.karoo.co.uk>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/**@{*/
#include <libopencm3/stm32/pwr.h>
void pwr_set_vos_scale(enum pwr_vos_scale scale)
{
uint32_t reg32;
reg32 = PWR_CR1;
reg32 &= ~(PWR_CR1_VOS_MASK << PWR_CR1_VOS_SHIFT);
switch (scale) {
case PWR_SCALE1:
reg32 |= (PWR_CR1_VOS_RANGE_1 << PWR_CR1_VOS_SHIFT);
break;
case PWR_SCALE2:
reg32 |= (PWR_CR1_VOS_RANGE_2 << PWR_CR1_VOS_SHIFT);
break;
}
PWR_CR1 = reg32;
}
/**@}*/