Peripheral DMA Controller (PDC)

See Quickstart guide for SAM PDCA driver.

The Peripheral DMA Controller (PDC) transfers data between on-chip serial peripherals and the on- and/or off-chip memories. The link between the PDC and a serial peripheral is operated by the AHB to ABP bridge.

Functions
void	PDCA_0_Handler (void)
	Interrupt handler for PDCA channel 0. More...
void	PDCA_10_Handler (void)
	Interrupt handler for PDCA channel 10. More...
void	PDCA_11_Handler (void)
	Interrupt handler for PDCA channel 11. More...
void	PDCA_12_Handler (void)
	Interrupt handler for PDCA channel 12. More...
void	PDCA_13_Handler (void)
	Interrupt handler for PDCA channel 13. More...
void	PDCA_14_Handler (void)
	Interrupt handler for PDCA channel 14. More...
void	PDCA_15_Handler (void)
	Interrupt handler for PDCA channel 15. More...
void	PDCA_1_Handler (void)
	Interrupt handler for PDCA channel 1. More...
void	PDCA_2_Handler (void)
	Interrupt handler for PDCA channel 2. More...
void	PDCA_3_Handler (void)
	Interrupt handler for PDCA channel 3. More...
void	PDCA_4_Handler (void)
	Interrupt handler for PDCA channel 4. More...
void	PDCA_5_Handler (void)
	Interrupt handler for PDCA channel 5. More...
void	PDCA_6_Handler (void)
	Interrupt handler for PDCA channel 6. More...
void	PDCA_7_Handler (void)
	Interrupt handler for PDCA channel 7. More...
void	PDCA_8_Handler (void)
	Interrupt handler for PDCA channel 8. More...
void	PDCA_9_Handler (void)
	Interrupt handler for PDCA channel 9. More...
void	pdca_channel_clear_error (pdca_channel_num_t pdca_ch_number)
	Clear transfer error for the given channel. More...
void	pdca_channel_disable (pdca_channel_num_t pdca_ch_number)
	Disable the PDCA for the given channel. More...
void	pdca_channel_disable_interrupt (pdca_channel_num_t pdca_ch_number, const pdca_channel_interrupt_mask_t pdca_channel_interrupt_mask)
	Disable PDCA interrupt. More...
void	pdca_channel_enable (pdca_channel_num_t pdca_ch_number)
	Enable the PDCA for the given channel. More...
void	pdca_channel_enable_interrupt (pdca_channel_num_t pdca_ch_number, const pdca_channel_interrupt_mask_t pdca_channel_interrupt_mask)
	Enable PDCA transfer error interrupt. More...
volatile PdcaChannel *	pdca_channel_get_handler (pdca_channel_num_t pdca_ch_number)
	Get PDCA channel handler. More...
pdca_channel_interrupt_mask_t	pdca_channel_get_interrupt_mask (pdca_channel_num_t pdca_ch_number)
	Get PDCA interrupt mask. More...
static void	pdca_channel_interrupt (const pdca_channel_num_t pdca_ch_number)
	Common PDCA channel interrupt handler. More...
bool	pdca_channel_is_enabled (pdca_channel_num_t pdca_ch_number)
	Check if PDCA channel is enabled. More...
uint32_t	pdca_channel_read_load_size (pdca_channel_num_t pdca_ch_number)
	Read PDCA channel load values from hardware. More...
uint32_t	pdca_channel_read_reload_size (pdca_channel_num_t pdca_ch_number)
	Read PDCA channel reload values from hardware. More...
void	pdca_channel_set_callback (pdca_channel_num_t pdca_ch_number, pdca_callback_t callback, uint8_t irq_line, uint8_t irq_level, const pdca_channel_interrupt_mask_t pdca_channel_interrupt_mask)
	Set callback for given PDCA channel. More...
void	pdca_channel_set_config (pdca_channel_num_t pdca_ch_number, const pdca_channel_config_t *cfg)
	Write PDCA channel configuration to hardware. More...
void	pdca_channel_write_load (pdca_channel_num_t pdca_ch_number, volatile void *addr, uint32_t size)
	Write PDCA channel load values to hardware. More...
void	pdca_channel_write_reload (pdca_channel_num_t pdca_ch_number, volatile void *addr, uint32_t size)
	Write PDCA channel reload values to hardware. More...
void	pdca_disable (Pdca *pdca)
	Disable the PDCA module. More...
void	pdca_enable (Pdca *pdca)
	Disable the PDCA module. More...
enum pdca_channel_status	pdca_get_channel_status (pdca_channel_num_t pdca_ch_number)
	Get the PDCA channel transfer enable status. More...

Variables
pdca_callback_t	pdca_callback_pointer [PDCA_NUMBER_OF_CHANNELS]
	PDCA private data for each channel. More...

void PDCA_0_Handler

(

void

)

Interrupt handler for PDCA channel 0.

References pdca_channel_interrupt().

void PDCA_10_Handler

(

void

)

Interrupt handler for PDCA channel 10.

References pdca_channel_interrupt().

void PDCA_11_Handler

(

void

)

Interrupt handler for PDCA channel 11.

References pdca_channel_interrupt().

void PDCA_12_Handler

(

void

)

Interrupt handler for PDCA channel 12.

References pdca_channel_interrupt().

void PDCA_13_Handler

(

void

)

Interrupt handler for PDCA channel 13.

References pdca_channel_interrupt().

void PDCA_14_Handler

(

void

)

Interrupt handler for PDCA channel 14.

References pdca_channel_interrupt().

void PDCA_15_Handler

(

void

)

Interrupt handler for PDCA channel 15.

References pdca_channel_interrupt().

void PDCA_1_Handler

(

void

)

Interrupt handler for PDCA channel 1.

References pdca_channel_interrupt().

void PDCA_2_Handler

(

void

)

Interrupt handler for PDCA channel 2.

References pdca_channel_interrupt().

void PDCA_3_Handler

(

void

)

Interrupt handler for PDCA channel 3.

References pdca_channel_interrupt().

void PDCA_4_Handler

(

void

)

Interrupt handler for PDCA channel 4.

References pdca_channel_interrupt().

void PDCA_5_Handler

(

void

)

Interrupt handler for PDCA channel 5.

References pdca_channel_interrupt().

void PDCA_6_Handler

(

void

)

Interrupt handler for PDCA channel 6.

References pdca_channel_interrupt().

void PDCA_7_Handler

(

void

)

Interrupt handler for PDCA channel 7.

References pdca_channel_interrupt().

void PDCA_8_Handler

(

void

)

Interrupt handler for PDCA channel 8.

References pdca_channel_interrupt().

void PDCA_9_Handler

(

void

)

Interrupt handler for PDCA channel 9.

References pdca_channel_interrupt().

void pdca_channel_clear_error

(

pdca_channel_num_t

pdca_ch_number

)

Clear transfer error for the given channel.

Parameters

pdca_ch_number

PDCA channel

References pdca_channel_get_handler().

void pdca_channel_disable

(

pdca_channel_num_t

pdca_ch_number

)

Disable the PDCA for the given channel.

Parameters

pdca_ch_number

PDCA channel

References pdca_channel_get_handler().

void pdca_channel_disable_interrupt	(	pdca_channel_num_t	pdca_ch_number,
		const pdca_channel_interrupt_mask_t	pdca_channel_interrupt_mask
	)

Disable PDCA interrupt.

Parameters

pdca_ch_number	PDCA channel
pdca_channel_interrupt_mask	Interrupts to be disabled.

References pdca_channel_get_handler().

void pdca_channel_enable

(

pdca_channel_num_t

pdca_ch_number

)

Enable the PDCA for the given channel.

Parameters

pdca_ch_number

PDCA channel

References pdca_channel_get_handler().

Referenced by main().

void pdca_channel_enable_interrupt	(	pdca_channel_num_t	pdca_ch_number,
		const pdca_channel_interrupt_mask_t	pdca_channel_interrupt_mask
	)

Enable PDCA transfer error interrupt.

Parameters

pdca_ch_number	PDCA channel
pdca_channel_interrupt_mask	Interrupts to be enabled.

References pdca_channel_get_handler().

Referenced by pdca_channel_set_callback().

volatile PdcaChannel* pdca_channel_get_handler

(

pdca_channel_num_t

pdca_ch_number

)

Get PDCA channel handler.

Parameters

pdca_ch_number

PDCA channel

Returns

channel handled or PDCA_INVALID_ARGUMENT

References PDCA_NUMBER_OF_CHANNELS.

Referenced by pdca_channel_clear_error(), pdca_channel_disable(), pdca_channel_disable_interrupt(), pdca_channel_enable(), pdca_channel_enable_interrupt(), pdca_channel_get_interrupt_mask(), pdca_channel_is_enabled(), pdca_channel_read_load_size(), pdca_channel_read_reload_size(), pdca_channel_set_config(), pdca_channel_write_load(), pdca_channel_write_reload(), and pdca_get_channel_status().

pdca_channel_interrupt_mask_t pdca_channel_get_interrupt_mask

(

pdca_channel_num_t

pdca_ch_number

)

Get PDCA interrupt mask.

Parameters

pdca_ch_number

PDCA channel

References pdca_channel_get_handler().

static void pdca_channel_interrupt ( const pdca_channel_num_t  pdca_ch_number )

static

Common PDCA channel interrupt handler.

Calls the channel callback with the channel status code. The following status codes are possible:

• DMA_CH_TRANSFER_COMPLETED: Transfer completed successfully
• DMA_CH_TRANSFER_ERROR: Fault in transfer

The optional callback used by the interrupt handler is set by the pdca_channel_set_callback() function.

Parameters

pdca_ch_number

PDCA channel number to handle interrupt for

References Assert, and pdca_get_channel_status().

Referenced by PDCA_0_Handler(), PDCA_10_Handler(), PDCA_11_Handler(), PDCA_12_Handler(), PDCA_13_Handler(), PDCA_14_Handler(), PDCA_15_Handler(), PDCA_1_Handler(), PDCA_2_Handler(), PDCA_3_Handler(), PDCA_4_Handler(), PDCA_5_Handler(), PDCA_6_Handler(), PDCA_7_Handler(), PDCA_8_Handler(), and PDCA_9_Handler().

bool pdca_channel_is_enabled

(

pdca_channel_num_t

pdca_ch_number

)

Check if PDCA channel is enabled.

Parameters

pdca_ch_number

PDCA channel number to query

Return values

true	PDCA channel is enabled
false	PDCA channel is disabled

References pdca_channel_get_handler().

uint32_t pdca_channel_read_load_size

(

pdca_channel_num_t

pdca_ch_number

)

Read PDCA channel load values from hardware.

Parameters

pdca_ch_number

PDCA channel

Returns

size of the data block to load

References pdca_channel_get_handler().

uint32_t pdca_channel_read_reload_size

(

pdca_channel_num_t

pdca_ch_number

)

Read PDCA channel reload values from hardware.

Parameters

pdca_ch_number

PDCA channel

Returns

size of the data block to reload

References pdca_channel_get_handler().

void pdca_channel_set_callback	(	pdca_channel_num_t	pdca_ch_number,
		pdca_callback_t	callback,
		uint8_t	irq_line,
		uint8_t	irq_level,
		const pdca_channel_interrupt_mask_t	pdca_channel_interrupt_mask
	)

Set callback for given PDCA channel.

Parameters

pdca_ch_number	PDCA channel number
callback	callback function pointer
irq_line	interrupt line.
irq_level	interrupt level.
pdca_channel_interrupt_mask	Interrupts to be enabled.

References irq_register_handler, and pdca_channel_enable_interrupt().

Referenced by main().

void pdca_channel_set_config	(	pdca_channel_num_t	pdca_ch_number,
		const pdca_channel_config_t *	cfg
	)

Write PDCA channel configuration to hardware.

Parameters

pdca_ch_number	PDCA channel
cfg	Pointer to a PDCA channel config

References pdca_channel_config_t::addr, pdca_channel_config_t::etrig, pdca_channel_get_handler(), pdca_channel_config_t::pid, pdca_channel_config_t::r_addr, pdca_channel_config_t::r_size, pdca_channel_config_t::ring, pdca_channel_config_t::size, and pdca_channel_config_t::transfer_size.

Referenced by main().

void pdca_channel_write_load	(	pdca_channel_num_t	pdca_ch_number,
		volatile void *	addr,
		uint32_t	size
	)

Write PDCA channel load values to hardware.

Parameters

pdca_ch_number	PDCA channel
addr	address where data to load are stored
size	size of the data block to load

References pdca_channel_get_handler().

void pdca_channel_write_reload	(	pdca_channel_num_t	pdca_ch_number,
		volatile void *	addr,
		uint32_t	size
	)

Write PDCA channel reload values to hardware.

Parameters

pdca_ch_number	PDCA channel
addr	address where data to load are stored
size	size of the data block to load

References pdca_channel_get_handler().

Referenced by pdca_tranfer_done().

void pdca_disable

(

Pdca *

pdca

)

Disable the PDCA module.

Parameters

pdca	Base address of the PDCA module

References SLEEPMGR_BACKUP, sleepmgr_unlock_mode(), and sysclk_disable_peripheral_clock().

void pdca_enable

(

Pdca *

pdca

)

Disable the PDCA module.

Parameters

pdca	Base address of the PDCA module

References SLEEPMGR_BACKUP, sleepmgr_lock_mode(), and sysclk_enable_peripheral_clock().

Referenced by main().

enum pdca_channel_status pdca_get_channel_status

(

pdca_channel_num_t

pdca_ch_number

)

Get the PDCA channel transfer enable status.

Parameters

pdca_ch_number

PDCA channel

Returns

1 if channel transfer is enabled, else 0

References PDCA_CH_BUSY, PDCA_CH_COUNTER_RELOAD_IS_ZERO, PDCA_CH_FREE, PDCA_CH_TRANSFER_COMPLETED, PDCA_CH_TRANSFER_ERROR, and pdca_channel_get_handler().

Referenced by pdca_channel_interrupt().

pdca_callback_t pdca_callback_pointer[PDCA_NUMBER_OF_CHANNELS]

PDCA private data for each channel.