82 lines
2.3 KiB
C
82 lines
2.3 KiB
C
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/** @addtogroup dac_file DAC peripheral API
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* @ingroup peripheral_apis
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@author @htmlonly © @endhtmlonly 2020 Ben Brewer <ben.brewer@codethink.co.uk>
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LGPL License Terms @ref lgpl_license
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*/
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/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2020 Ben Brewer
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**@{*/
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#include <libopencm3/stm32/dac.h>
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/** @brief DAC Channel Output Buffer Enable.
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Enable a digital to analog converter channel output drive buffer. This is an
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optional amplifying buffer that provides additional drive for the output
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signal. The buffer is enabled by default after a reset and needs to be
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explicitly disabled if required.
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@param[in] dac the base address of the DAC. @ref dac_reg_base
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@param[in] channel with DAC mask. @ref dac_channel_id
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*/
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void dac_buffer_enable(uint32_t dac, int channel)
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{
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switch (channel) {
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case DAC_CHANNEL1:
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DAC_CR(dac) &= ~DAC_CR_BOFF1;
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break;
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case DAC_CHANNEL2:
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DAC_CR(dac) &= ~DAC_CR_BOFF2;
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break;
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case DAC_CHANNEL_BOTH:
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DAC_CR(dac) &= ~(DAC_CR_BOFF1 | DAC_CR_BOFF2);
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break;
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}
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}
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/** @brief DAC Channel Output Buffer Disable.
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Disable a digital to analog converter channel output drive buffer. Disabling
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this will reduce power consumption slightly and will increase the output
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impedance of the DAC. The buffers are enabled by default after a reset.
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@param[in] dac the base address of the DAC. @ref dac_reg_base
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@param[in] channel with DAC mask. @ref dac_channel_id
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*/
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void dac_buffer_disable(uint32_t dac, int channel)
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{
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switch (channel) {
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case DAC_CHANNEL1:
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DAC_CR(dac) |= DAC_CR_BOFF1;
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break;
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case DAC_CHANNEL2:
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DAC_CR(dac) |= DAC_CR_BOFF2;
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break;
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case DAC_CHANNEL_BOTH:
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DAC_CR(dac) |= (DAC_CR_BOFF1 | DAC_CR_BOFF2);
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break;
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}
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}
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/**@}*/
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