Software APIs
dt_gpio.c File Reference

Device Tables (DT) for IP gpio and top earlgrey. More...

#include "dt/dt_gpio.h"

Go to the source code of this file.

Data Structures

struct  dt_desc_gpio
 Description of instances. More...
 
struct  dt_desc_gpio.ipgen_ext
 

Macros

#define TRY_GET_DT(dt, default)
 Return a pointer to the dt_gpio_desc_t structure of the requested dt if it's a valid index.
 

Typedefs

typedef struct dt_desc_gpio dt_desc_gpio_t
 Description of instances.
 

Functions

dt_gpio_t dt_gpio_from_instance_id (dt_instance_id_t inst_id)
 Get the gpio instance from an instance ID.
 
dt_instance_id_t dt_gpio_instance_id (dt_gpio_t dt)
 Get the instance ID of an instance.
 
uint32_t dt_gpio_reg_block (dt_gpio_t dt, dt_gpio_reg_block_t reg_block)
 Get the register base address of an instance.
 
dt_plic_irq_id_t dt_gpio_irq_to_plic_id (dt_gpio_t dt, dt_gpio_irq_t irq)
 Get the PLIC ID of a gpio IRQ for a given instance.
 
dt_gpio_irq_t dt_gpio_irq_from_plic_id (dt_gpio_t dt, dt_plic_irq_id_t irq)
 Convert a global IRQ ID to a local gpio IRQ type.
 
dt_alert_id_t dt_gpio_alert_to_alert_id (dt_gpio_t dt, dt_gpio_alert_t alert)
 Get the alert ID of a gpio alert for a given instance.
 
dt_gpio_alert_t dt_gpio_alert_from_alert_id (dt_gpio_t dt, dt_alert_id_t alert)
 Convert a global alert ID to a local gpio alert type.
 
dt_periph_io_t dt_gpio_periph_io (dt_gpio_t dt, dt_gpio_periph_io_t sig)
 Get the peripheral I/O description of an instance.
 
dt_clock_t dt_gpio_clock (dt_gpio_t dt, dt_gpio_clock_t clk)
 Get the clock signal connected to a clock port of an instance.
 
dt_reset_t dt_gpio_reset (dt_gpio_t dt, dt_gpio_reset_t rst)
 Get the reset signal connected to a reset port of an instance.
 
uint8_t dt_gpio_input_period_counter_count (dt_gpio_t dt)
 Get the number of input period counters.
 

Detailed Description

Device Tables (DT) for IP gpio and top earlgrey.

Definition in file dt_gpio.c.


Data Structure Documentation

◆ dt_desc_gpio

struct dt_desc_gpio

Description of instances.

Definition at line 21 of file dt_gpio.c.

Data Fields
uint32_t base_addr[kDtGpioRegBlockCount] Base address of each register block.
dt_clock_t clock[kDtGpioClockCount] Clock signal connected to each clock port.
top_darjeeling_alert_id_t first_alert Alert ID of the first Alert of this instance.

This value is undefined if the block is not connected to the Alert Handler.

top_earlgrey_alert_id_t first_alert Alert ID of the first Alert of this instance.

This value is undefined if the block is not connected to the Alert Handler.

top_darjeeling_plic_irq_id_t first_irq PLIC ID of the first IRQ of this instance.

This can be kDtPlicIrqIdNone if the block is not connected to the PLIC.

top_earlgrey_plic_irq_id_t first_irq PLIC ID of the first IRQ of this instance.

This can be kDtPlicIrqIdNone if the block is not connected to the PLIC.

top_englishbreakfast_plic_irq_id_t first_irq PLIC ID of the first IRQ of this instance.

This can be kDtPlicIrqIdNone if the block is not connected to the PLIC.

dt_instance_id_t inst_id Instance ID.
struct dt_desc_gpio ipgen_ext Extension.
struct dt_desc_gpio ipgen_ext Extension.
struct dt_desc_gpio.ipgen_ext ipgen_ext Extension.
dt_periph_io_t periph_io[kDtGpioPeriphIoCount] Description of each peripheral I/O.
dt_reset_t reset[kDtGpioResetCount] Reset signal connected to each reset port.

◆ dt_desc_gpio.ipgen_ext

struct dt_desc_gpio.ipgen_ext

Definition at line 33 of file dt_gpio.c.

Data Fields
uint8_t input_period_counter_count number of input period counters
uint8_t input_period_counter_count number of input period counters
uint8_t input_period_counter_count number of input period counters

Macro Definition Documentation

◆ TRY_GET_DT

#define TRY_GET_DT ( dt,
default )
Value:
({ if ((dt) < (dt_gpio_t)0 || (dt) >= kDtGpioCount) return (default); &gpio_desc[dt]; })

Return a pointer to the dt_gpio_desc_t structure of the requested dt if it's a valid index.

Otherwise, this macro will return (i.e. exit the function) with the provided default value.

Definition at line 330 of file dt_gpio.c.

Function Documentation

◆ dt_gpio_alert_from_alert_id()

dt_gpio_alert_t dt_gpio_alert_from_alert_id ( dt_gpio_t dt,
dt_alert_id_t alert )

Convert a global alert ID to a local gpio alert type.

Parameters
dtInstance of gpio.
alertA global alert ID that belongs to this instance.
Returns
The gpio alert, or kDtGpioAlertCount.

Note: This function assumes that the global alert ID belongs to the instance of gpio passed in parameter. In other words, it must be the case that dt_gpio_instance_id(dt) == dt_alert_id_to_instance_id(alert). Otherwise, this function will return kDtGpioAlertCount.

Definition at line 382 of file dt_gpio.c.

◆ dt_gpio_alert_to_alert_id()

dt_alert_id_t dt_gpio_alert_to_alert_id ( dt_gpio_t dt,
dt_gpio_alert_t alert )

Get the alert ID of a gpio alert for a given instance.

Note: This function only makes sense if the instance is connected to the Alert Handler. For any instances where the instance is not connected, the return value is unspecified.

Parameters
dtInstance of gpio.
alertA gpio alert.
Returns
The Alert Handler alert ID of the alert of this instance.

Definition at line 376 of file dt_gpio.c.

◆ dt_gpio_clock()

Get the clock signal connected to a clock port of an instance.

Parameters
dtInstance of gpio.
clkClock port.
Returns
Clock signal.

Definition at line 400 of file dt_gpio.c.

◆ dt_gpio_from_instance_id()

dt_gpio_t dt_gpio_from_instance_id ( dt_instance_id_t inst_id)

Get the gpio instance from an instance ID.

For example, dt_uart_from_instance_id(kDtInstanceIdUart3) == kDtUart3.

Parameters
inst_idInstance ID.
Returns
A gpio instance.

Note: This function only makes sense if the instance ID has device type gpio, otherwise the returned value is unspecified.

Definition at line 332 of file dt_gpio.c.

◆ dt_gpio_input_period_counter_count()

uint8_t dt_gpio_input_period_counter_count ( dt_gpio_t dt)

Get the number of input period counters.

Parameters
dtInstance of gpio.
Returns
number of input period counters.

Definition at line 419 of file dt_gpio.c.

◆ dt_gpio_instance_id()

dt_instance_id_t dt_gpio_instance_id ( dt_gpio_t dt)

Get the instance ID of an instance.

Parameters
dtInstance of gpio.
Returns
The instance ID of that instance.

Definition at line 339 of file dt_gpio.c.

◆ dt_gpio_irq_from_plic_id()

dt_gpio_irq_t dt_gpio_irq_from_plic_id ( dt_gpio_t dt,
dt_plic_irq_id_t irq )

Convert a global IRQ ID to a local gpio IRQ type.

Parameters
dtInstance of gpio.
irqA PLIC ID that belongs to this instance.
Returns
The gpio IRQ, or kDtGpioIrqCount.

Note: This function assumes that the PLIC ID belongs to the instance of gpio passed in parameter. In other words, it must be the case that dt_gpio_instance_id(dt) == dt_plic_id_to_instance_id(irq). Otherwise, this function will return kDtGpioIrqCount.

Definition at line 361 of file dt_gpio.c.

◆ dt_gpio_irq_to_plic_id()

dt_plic_irq_id_t dt_gpio_irq_to_plic_id ( dt_gpio_t dt,
dt_gpio_irq_t irq )

Get the PLIC ID of a gpio IRQ for a given instance.

If the instance is not connected to the PLIC, this function will return kDtPlicIrqIdNone.

Parameters
dtInstance of gpio.
irqA gpio IRQ.
Returns
The PLIC ID of the IRQ of this instance.

Definition at line 351 of file dt_gpio.c.

◆ dt_gpio_periph_io()

Get the peripheral I/O description of an instance.

Parameters
dtInstance of gpio.
sigRequested peripheral I/O.
Returns
Description of the requested peripheral I/O for this instance.

Definition at line 393 of file dt_gpio.c.

◆ dt_gpio_reg_block()

uint32_t dt_gpio_reg_block ( dt_gpio_t dt,
dt_gpio_reg_block_t reg_block )

Get the register base address of an instance.

Parameters
dtInstance of gpio.
reg_blockThe register block requested.
Returns
The register base address of the requested block.

Definition at line 344 of file dt_gpio.c.

◆ dt_gpio_reset()

Get the reset signal connected to a reset port of an instance.

Parameters
dtInstance of gpio.
rstReset port.
Returns
Reset signal.

Definition at line 407 of file dt_gpio.c.