lora-car/libopencm3/lib/stm32/common/dma_common_csel.c
Arti Zirk 054740c5de git subrepo clone https://github.com/libopencm3/libopencm3.git
subrepo:
  subdir:   "libopencm3"
  merged:   "88e91c9a7cce"
upstream:
  origin:   "https://github.com/libopencm3/libopencm3.git"
  branch:   "master"
  commit:   "88e91c9a7cce"
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2023-01-21 21:54:42 +02:00

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1.5 KiB
C

/** @addtogroup dma_file
*/
/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2019 Guillaume Revaillot <g.revaillot@gmail.com>
*
* 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/dma.h>
/*---------------------------------------------------------------------------*/
/** @brief DMA Channel Set Request Selection
Set DMA request mapping selection for given channel. Refer to datasheet for channel
request mapping tables.
@param[in] dma DMA controller base address: DMA1 or DMA2
@param[in] channel Channel number: 1-7 for DMA1 or 1-5 for DMA2
@param[in] request DMA request mapping.
*/
void dma_set_channel_request(uint32_t dma, uint8_t channel, uint8_t request)
{
uint32_t reg32 = DMA_CSELR(dma) & ~(DMA_CSELR_CxS_MASK << DMA_CSELR_CxS_SHIFT(channel));
DMA_CSELR(dma) = reg32 | ((DMA_CSELR_CxS_MASK & request) << DMA_CSELR_CxS_SHIFT(channel));
}
/**@}*/