PPI

nRF52 programmable peripheral interconnect channels. More...

Functions
int	soc_nrf_ppi_alloc (uint8_t *channel)
	Allocate a channel, for good.
void	soc_nrf_ppi_setup (uint8_t channel, uintptr_t eep, uintptr_t tep, uintptr_t fork_tep)
	Connect the event and tasks of a channel.
void	soc_nrf_ppi_enable (uint32_t mask)
	Enable channels.
void	soc_nrf_ppi_disable (uint32_t mask)
	Disable channels.

Detailed Description

nRF52 programmable peripheral interconnect channels.

A channel connects a peripheral event to a task, and optionally to a second, fork task, so that the task runs on the event without the CPU. Drivers allocate their channels once:

ret = soc_nrf_ppi_alloc(&ch);
if (ret != 0) {
  return ret;
}
 
soc_nrf_ppi_setup(ch, timer_base + EVENTS_COMPARE0, gpiote_base + TASKS_SET0, 0U);
soc_nrf_ppi_enable(PBL_BIT(ch));

The channels the NimBLE radio driver programs directly are never allocated when it is built.

Function Documentation

soc_nrf_ppi_alloc()

int soc_nrf_ppi_alloc

(

uint8_t *

channel

)

Allocate a channel, for good.

Parameters

[out]

channel

Allocated channel.

Returns

0 or -ENOMEM if all channels are in use.

soc_nrf_ppi_disable()

void soc_nrf_ppi_disable

(

uint32_t

mask

)

Disable channels.

Parameters

mask	Channels, one bit each.

soc_nrf_ppi_enable()

void soc_nrf_ppi_enable

(

uint32_t

mask

)

Enable channels.

Parameters

mask	Channels, one bit each.

soc_nrf_ppi_setup()

void soc_nrf_ppi_setup	(	uint8_t	channel,
		uintptr_t	eep,
		uintptr_t	tep,
		uintptr_t	fork_tep
	)

Connect the event and tasks of a channel.

Parameters

channel	Channel, from soc_nrf_ppi_alloc().
eep	Event register address.
tep	Task register address.
fork_tep	Fork task register address, or 0 for none.