blob: 4cf1fca994e20a20b3f9c91b4353620597f6a92a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
/** @addtogroup dma_file DMA peripheral API
@ingroup peripheral_apis
LGPL License Terms @ref lgpl_license
*/
/*
* 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));
}
/**@}*/
|
