stm32_dma.c File Reference

Implementation of stm32 DMA functionality. More...

#include "stm32_dma.h"
#include "no_os_error.h"
#include "no_os_alloc.h"
#include "stm32_irq.h"

Include dependency graph for stm32_dma.c:

Functions
int	stm32_dma_config_xfer (struct no_os_dma_ch *channel, struct no_os_dma_xfer_desc *xfer)
	Configure a DMA channel for a transfer.
int	stm32_dma_init (struct no_os_dma_desc **desc, const struct no_os_dma_init_param *param)
	Initialize a DMA controller.
int	stm32_dma_xfer_start (struct no_os_dma_desc *desc, struct no_os_dma_ch *chan)
	Start a DMA transfer for a specific channel .
int	stm32_dma_xfer_abort (struct no_os_dma_desc *desc, struct no_os_dma_ch *chan)
	Disable a DMA channel.
int	stm32_dma_remove (struct no_os_dma_desc *desc)
	Free the resources allocated for a DMA descriptor.

Variables
const struct no_os_dma_platform_ops	stm32_dma_ops
	stm32 platform specific DMA platform ops structure

Detailed Description

Implementation of stm32 DMA functionality.

Author

Janani Sunil (janan.nosp@m.i.su.nosp@m.nil@a.nosp@m.nalo.nosp@m.g.com)

Copyright 2024(c) Analog Devices, Inc.

SPDX-License-Identifier: BSD-3-Clause

Function Documentation

stm32_dma_config_xfer()

int stm32_dma_config_xfer	(	struct no_os_dma_ch *	channel,
		struct no_os_dma_xfer_desc *	xfer )

Configure a DMA channel for a transfer.

Parameters

channel	- The DMA channel descriptor.
xfer	- Descriptor for the transfer.

Returns

0 in case of success, negative error codes otherwise

stm32_dma_init()

int stm32_dma_init	(	struct no_os_dma_desc **	desc,
		const struct no_os_dma_init_param *	param )

Initialize a DMA controller.

Parameters

desc	- Descriptor to be initialized.
param	- Initialization parameter for the decriptor.

Returns

0 in case of success -ENOMEM if there is not enough free memory

stm32_dma_remove()

int stm32_dma_remove

(

struct no_os_dma_desc *

desc

)

Free the resources allocated for a DMA descriptor.

Parameters

desc	- Descriptor to be freed.

Returns

0 in case of success, negative error code otherwise

stm32_dma_xfer_abort()

int stm32_dma_xfer_abort	(	struct no_os_dma_desc *	desc,
		struct no_os_dma_ch *	chan )

Disable a DMA channel.

Parameters

desc	- Descriptor for the DMA controller.
chan	- The DMA Channel

Returns

0 in case of success, negative error codes otherwise

stm32_dma_xfer_start()

int stm32_dma_xfer_start	(	struct no_os_dma_desc *	desc,
		struct no_os_dma_ch *	chan )

Start a DMA transfer for a specific channel .

Parameters

desc	- Descriptor for the DMA controller.
chan	- The DMA Channel

Returns

0 in case of success, negative error codes otherwise

Variable Documentation

stm32_dma_ops

const struct no_os_dma_platform_ops stm32_dma_ops

Initial value:

= {
    .dma_init = stm32_dma_init,
    .dma_config_xfer = stm32_dma_config_xfer,
    .dma_xfer_start = stm32_dma_xfer_start,
    .dma_xfer_abort = stm32_dma_xfer_abort,
    .dma_remove = stm32_dma_remove
}

stm32 platform specific DMA platform ops structure