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stm32: dma: add dma_set_channel_request to ease dma cselr usage.

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This commit is contained in:
Guillaume Revaillot 2019-06-11 16:59:57 +02:00 committed by Karl Palsson
parent eb0bc099f4
commit 7d344b187d
5 changed files with 52 additions and 3 deletions
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2
include/libopencm3/stm32/common/dma_common_csel.h
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@ -43,6 +43,8 @@ specific memorymap.h header before including this header file.*/
BEGIN_DECLS
void dma_set_channel_request(uint32_t dma, uint8_t channel, uint8_t request);
END_DECLS
/** @cond */

46
lib/stm32/common/dma_common_csel.c Normal file
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@ -0,0 +1,46 @@
/** @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));
}
/**@}*/

3
lib/stm32/f0/Makefile
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@ -39,7 +39,8 @@ OBJS = can.o flash.o rcc.o comparator.o \
OBJS += gpio_common_all.o gpio_common_f0234.o crc_common_all.o crc_v2.o \
pwr_common_v1.o iwdg_common_all.o rtc_common_l1f024.o \
dma_common_l1f013.o exti_common_all.o \
dma_common_l1f013.o dma_common_csel.o \
exti_common_all.o \
dac_common_all.o \
timer_common_all.o timer_common_f0234.o rcc_common_all.o

2
lib/stm32/l0/Makefile
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@ -42,7 +42,7 @@ OBJS += spi_common_all.o spi_common_v1.o spi_common_v1_frf.o
OBJS += gpio_common_all.o gpio_common_f0234.o rcc_common_all.o
OBJS += adc_common_v2.o
OBJS += crs_common_all.o
OBJS += dma_common_l1f013.o
OBJS += dma_common_l1f013.o dma_common_csel.o
OBJS += exti_common_all.o
OBJS += flash_common_all.o flash_common_l01.o
OBJS += i2c_common_v2.o

2
lib/stm32/l4/Makefile
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@ -50,7 +50,7 @@ OBJS += rng_common_v1.o
OBJS += timer_common_all.o
OBJS += i2c_common_v2.o
OBJS += usart_common_all.o usart_common_v2.o
OBJS += dma_common_l1f013.o
OBJS += dma_common_l1f013.o dma_common_csel.o
OBJS += iwdg_common_all.o
OBJS += rtc_common_l1f024.o
OBJS += spi_common_all.o spi_common_v2.o