STM32 DMA subsystem driver header. More...

#include "hal_stm32_dma.h"

Include dependency graph for hal_stm32_dma.c:

Functions
static void	dma_lld_serve_interrupt (DMADriver *dmap, uint32_t flags)
	DMA ISR service routine. More...

void	dmaObjectInit (DMADriver *dmap)

bool	dmaStart (DMADriver dmap, const DMAConfig cfg)
	Configures and activates the DMA peripheral. More...

void	dmaStop (DMADriver *dmap)
	Deactivates the DMA peripheral. More...

bool	dmaStartTransfert (DMADriver dmap, volatile void periphp, void *mem0p, const size_t size)
	Starts a DMA transaction. More...

bool	dmaStartTransfertI (DMADriver dmap, volatile void periphp, void *mem0p, const size_t size)
	Starts a DMA transaction. More...

void	dmaStopTransfert (DMADriver *dmap)
	Stops an ongoing transaction. More...

void	dmaStopTransfertI (DMADriver *dmap)
	Stops an ongoing transaction. More...

msg_t	dmaTransfertTimeout (DMADriver dmap, volatile void periphp, void *mem0p, const size_t size, sysinterval_t timeout)
	Performs a DMA transaction. More...

void	dmaAcquireBus (DMADriver *dmap)
	Gains exclusive access to the DMA peripheral. More...

void	dmaReleaseBus (DMADriver *dmap)
	Releases exclusive access to the DMA peripheral. More...

bool	dma_lld_start (DMADriver *dmap)
	Configures and activates the DMA peripheral. More...

bool	dma_lld_start_transfert (DMADriver dmap, volatile void periphp, void *mem0p, const size_t size)
	Starts a DMA transaction. More...

void	dma_lld_stop_transfert (DMADriver *dmap)
	Stops an ongoing transaction. More...

void	dma_lld_stop (DMADriver *dmap)
	Deactivates the DMA peripheral. More...

Detailed Description

STM32 DMA subsystem driver header.

Author: Alexandre Bustico Gautier Hattenberger gauti.nosp@m.er.h.nosp@m.atten.nosp@m.berg.nosp@m.er@en.nosp@m.ac.f.nosp@m.r

Definition in file hal_stm32_dma.c.

Function Documentation

static void dma_lld_serve_interrupt	(	DMADriver *	dmap,
		uint32_t	flags
	)

static

DMA ISR service routine.

DMA DMA ISR service routine.

Parameters

[in]	dmap	pointer to the `DMADriver` object
[in]	flags	pre-shifted content of the ISR register

Definition at line 704 of file hal_stm32_dma.c.

References _dma_isr_error_code(), _dma_isr_full_code(), _dma_isr_half_code(), DMA_ACTIVE, DMA_ERR_DIRECTMODE_ERROR, DMA_ERR_FIFO_ERROR, DMA_ERR_TRANSFER_ERROR, and DMADriver::state.

Referenced by dma_lld_start().

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bool dma_lld_start ( DMADriver * dmap )

Configures and activates the DMA peripheral.

Parameters

[in] dmap pointer to the DMADriver object

Definition at line 383 of file hal_stm32_dma.c.

References DMAConfig::circular, DMADriver::config, DMADriver::controller, DMAConfig::direction, DMA_DIR_M2M, DMA_DIR_M2P, DMA_DIR_P2M, dma_lld_serve_interrupt(), DMAConfig::dma_priority, DMADriver::dmamode, DMADriver::dmastream, DMAConfig::end_cb, DMAConfig::error_cb, DMAConfig::inc_memory_addr, DMAConfig::inc_peripheral_addr, DMAConfig::irq_priority, DMAConfig::msize, DMAConfig::psize, STM32_DMA_SUPPORTS_CSELR, and DMAConfig::stream.

Referenced by dmaStart().

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bool dma_lld_start_transfert	(	DMADriver *	dmap,
		volatile void *	periphp,
		void *	mem0p,
		const size_t	size
	)

Starts a DMA transaction.

Parameters

[in] dmap pointer to the DMADriver object

Definition at line 656 of file hal_stm32_dma.c.

References DMADriver::dmamode, DMADriver::dmastream, DMADriver::mem0p, and DMADriver::size.

Referenced by dmaStartTransfertI().

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void dma_lld_stop ( DMADriver * dmap )

Deactivates the DMA peripheral.

Parameters

[in] dmap pointer to the DMADriver object

Definition at line 688 of file hal_stm32_dma.c.

References DMADriver::dmastream.

Referenced by dmaStop().

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void dma_lld_stop_transfert ( DMADriver * dmap )

Stops an ongoing transaction.

Parameters

[in] dmap pointer to the DMADriver object

Definition at line 676 of file hal_stm32_dma.c.

References DMADriver::dmastream.

Referenced by _dma_isr_error_code(), _dma_isr_full_code(), dmaStopTransfert(), and dmaStopTransfertI().

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void dmaAcquireBus ( DMADriver * dmap )

Gains exclusive access to the DMA peripheral.

This function tries to gain ownership to the DMA bus, if the bus is already being used then the invoking thread is queued.

Precondition: In order to use this function the option DMA_USE_MUTUAL_EXCLUSION must be enabled.

Parameters

[in] dmap pointer to the DMADriver object

Definition at line 332 of file hal_stm32_dma.c.

void dmaObjectInit ( DMADriver * dmap )

Definition at line 53 of file hal_stm32_dma.c.

References DMADriver::config, DMA_STOP, DMADriver::mem0p, and DMADriver::state.

Referenced by dshotStart(), and light_ws2812_arch_init().

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void dmaReleaseBus ( DMADriver * dmap )

Releases exclusive access to the DMA peripheral.

Precondition: In order to use this function the option DMA_USE_MUTUAL_EXCLUSION must be enabled.

Parameters

[in] dmap pointer to the DMADriver object

Definition at line 349 of file hal_stm32_dma.c.

bool dmaStart	(	DMADriver *	dmap,
		const DMAConfig *	cfg
	)

Configures and activates the DMA peripheral.

Parameters

[in]	dmap	pointer to the `DMADriver` object
[in]	config	pointer to the `DMAConfig` object.

Returns: The operation result.

Return values

true	dma driver is OK
false	incoherencies has been found in config

Definition at line 85 of file hal_stm32_dma.c.

References DMADriver::config, dma_lld_start(), DMA_READY, DMA_STOP, and DMADriver::state.

Referenced by dshotStart(), and light_ws2812_arch_init().

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bool dmaStartTransfert	(	DMADriver *	dmap,
		volatile void *	periphp,
		void *	mem0p,
		const size_t	size
	)

Starts a DMA transaction.

Starts one or many asynchronous dma transaction(s) depending on continuous field

Postcondition: The callbacks associated to the DMA config will be invoked on buffer fill and error events, and timeout events in case STM32_DMA_USE_ASYNC_TIMOUT == TRUE

Note: The datas are sequentially written into the buffer with no gaps.

Parameters

[in]	dmap	pointer to the `DMADriver` object
[in,out]	periphp	pointer to a `peripheral` register address
[in,out]	mem0p	pointer to the data buffer
[in]	size	buffer size. The buffer size must be one or an even number.

Definition at line 142 of file hal_stm32_dma.c.

References dmaStartTransfertI().

Referenced by dshotSendFrame(), and light_ws2812_arch_init().

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bool dmaStartTransfertI	(	DMADriver *	dmap,
		volatile void *	periphp,
		void *	mem0p,
		const size_t	size
	)

Starts a DMA transaction.

Starts one or many asynchronous dma transaction(s) depending on continuous field

Postcondition: The callbacks associated to the DMA config will be invoked on buffer fill and error events, and timeout events in case STM32_DMA_USE_ASYNC_TIMOUT == TRUE

Note: The datas are sequentially written into the buffer with no gaps.

Parameters

[in]	dmap	pointer to the `DMADriver` object
[in,out]	periphp	pointer to a `peripheral` register address
[in,out]	mem0p	pointer to the data buffer
[in]	size	buffer size. The buffer size must be one or an even number.

Definition at line 167 of file hal_stm32_dma.c.

References DMADriver::config, DMA_ACTIVE, DMA_COMPLETE, DMA_ERROR, dma_lld_start_transfert(), DMA_READY, DMAConfig::msize, DMAConfig::psize, and DMADriver::state.

Referenced by dmaStartTransfert(), and dmaTransfertTimeout().

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void dmaStop ( DMADriver * dmap )

Deactivates the DMA peripheral.

Parameters

[in] dmap pointer to the DMADriver object

Definition at line 107 of file hal_stm32_dma.c.

References DMADriver::config, dma_lld_stop(), DMA_READY, DMA_STOP, DMADriver::mem0p, and DMADriver::state.

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void dmaStopTransfert ( DMADriver * dmap )

Stops an ongoing transaction.

This function stops the currently ongoing transaction and returns the driver in the DMA_READY state. If there was no transaction being processed then the function does nothing.

Parameters

[in] dmap pointer to the DMADriver object

Definition at line 232 of file hal_stm32_dma.c.

References _dma_reset_s, DMA_ACTIVE, dma_lld_stop_transfert(), DMA_READY, and DMADriver::state.

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void dmaStopTransfertI ( DMADriver * dmap )

Stops an ongoing transaction.

This function stops the currently ongoing transaction and returns the driver in the DMA_READY state. If there was no transaction being processed then the function does nothing.

Parameters

[in] dmap pointer to the DMADriver object

Definition at line 260 of file hal_stm32_dma.c.

References _dma_reset_i, DMA_ACTIVE, DMA_COMPLETE, dma_lld_stop_transfert(), DMA_READY, and DMADriver::state.

Referenced by dmaTransfertTimeout().

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msg_t dmaTransfertTimeout	(	DMADriver *	dmap,
		volatile void *	periphp,
		void *	mem0p,
		const size_t	size,
		sysinterval_t	timeout
	)

Performs a DMA transaction.

Performs one synchronous dma transaction

Note: The datas are sequentially written into the buffer with no gaps.

Parameters

[in]	dmap	pointer to the `DMADriver` object
[in,out]	periphp	pointer to a `peripheral` register address
[in,out]	mem0p	pointer to the data buffer
[in]	size	buffer size. The buffer size must be one or an even number.
[in]	timeout	function will exit after timeout is transaction is not done can be TIME_INFINITE (but not TIME_IMMEDIATE)

Returns: The operation result.

Return values

MSG_OK	Transaction finished.
MSG_RESET	The transaction has been stopped using `dmaStopTransaction()` or `dmaStopTransactionI()`, the result buffer may contain incorrect data.
MSG_TIMEOUT	The transaction has been stopped because of hardware error or timeout limit reach

Definition at line 303 of file hal_stm32_dma.c.

References dmaStartTransfertI(), dmaStopTransfertI(), and msg.

Referenced by dmaTransfert().

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Functions

Detailed Description

Function Documentation