Functions
fsp_err_t	R_INTC_IRQ_ExternalIrqOpen (external_irq_ctrl_t const p_api_ctrl, external_irq_cfg_t const const p_cfg)

fsp_err_t	R_INTC_IRQ_ExternalIrqEnable (external_irq_ctrl_t *const p_api_ctrl)

fsp_err_t	R_INTC_IRQ_ExternalIrqDisable (external_irq_ctrl_t *const p_api_ctrl)

fsp_err_t	R_INTC_IRQ_ExternalIrqCallbackSet (external_irq_ctrl_t const p_api_ctrl, void(p_callback)(external_irq_callback_args_t ), void const const p_context, external_irq_callback_args_t *const p_callback_memory)

fsp_err_t	R_INTC_IRQ_ExternalIrqClose (external_irq_ctrl_t *const p_api_ctrl)

Detailed Description

Driver for the INTC_IRQ peripheral on RZ MPUs. This module implements the External IRQ Interface.

Overview

The Interrupt Controller controls which event signals are linked to the GIC module. The R_INTC_IRQ software module only implements the External IRQ Interface. The interface is for configuring interrupts to fire when a trigger condition is detected on an external IRQ pin.

Note: Multiple instances are used when more than one external interrupt is needed. Configure each instance with different channels and properties as needed for the specific interrupt.

Features

Supports configuring interrupts for IRQ.
- Enabling and disabling interrupt generation.
- Configuring interrupt trigger on rising edge, falling edge, both edges, or low level signal.
Supports configuring a user callback function, which will be invoked by the HAL module when an external IRQ pin interrupt is generated.

Configuration

Build Time Configurations for r_intc_irq

The following build time configurations are defined in fsp_cfg/r_intc_irq_cfg.h:

Configuration	Options	Default	Description
Parameter Checking	Default (BSP) Enabled Disabled	Default (BSP)	If selected code for parameter checking is included in the build.

Configurations for Input > External IRQ Driver on r_intc_irq

This module can be added to the Stacks tab via New Stack > Input > External IRQ Driver on r_intc_irq.

Configuration	Options	Default	Description
Name	Name must be a valid C symbol	g_external_irq0	Module name.
Channel	Value must be a non-negative integer	0	Specify the hardware channel.
Trigger	MCU Specific Options		Select the signal edge or state that triggers an interrupt.
Callback	Name must be a valid C symbol	NULL	A user callback function can be provided here. If this callback function is provided, it is called from the interrupt service routine (ISR) each time the IRQn triggers
Pin Interrupt Priority	Value must be an integer between 0 and 31	24	Select the PIN interrupt priority(0-31). Note: If you specify the lowest priority (i.e.,31), no interrupt will occur.

Clock Configuration

The INTC_IRQ peripheral module doesn't require any specific clock settings.

Pin Configuration

The pin for the external interrupt channel must be configured as an input with IRQ Input Enabled.

Limitation

Pin configuration does not show conflicts when same IRQ is used by multiple pins.

Usage Notes

Examples

Basic Example

This is a basic example of minimal use of the INTC_IRQ in an application.

#define INTC_IRQN_PIN    BSP_IO_PORT_00_PIN_03
#define INTC_IRQN        1
/* Called from r_intc_irq_isr */
void external_irq_callback (external_irq_callback_args_t * p_args)
{
    (void) p_args;
    g_external_irq_complete = 1;
}
void simple_example ()
{
    /* Example Configuration */
    external_irq_cfg_t g_external_irq_cfg =
    {
        .channel          = INTC_IRQN,
        .trigger          = EXTERNAL_IRQ_TRIG_RISING,
        .filter_enable    = false,
        .clock_source_div = EXTERNAL_IRQ_CLOCK_SOURCE_DIV_1,
        .p_callback       = external_irq_callback,
        .p_context        = 0,
        .ipl              = 24,
        .irq              = GPIO_IRQ1_IRQn,
    };
    /* Configure the external interrupt. */
    fsp_err_t err = R_INTC_IRQ_ExternalIrqOpen(&g_external_irq_ctrl, &g_external_irq_cfg);
    assert(FSP_SUCCESS == err);
    /* Enable the external interrupt. */
    err = R_INTC_IRQ_ExternalIrqEnable(&g_external_irq_ctrl);
    assert(FSP_SUCCESS == err);
    while (0 == g_external_irq_complete)
    {
        /* Wait for interrupt. */
    }
}

Data Structures
struct	intc_irq_instance_ctrl_t

Data Structure Documentation

◆ intc_irq_instance_ctrl_t

struct intc_irq_instance_ctrl_t

INTC_IRQ private control block. DO NOT MODIFY. Initialization occurs when R_INTC_IRQ_ExternalIrqOpen is called.

Data Fields
uint32_t	open
	Used to determine if channel control block is in use.

IRQn_Type	irq
	Interrupt number.

uint8_t	channel
	Channel.

void const *	p_context

Field Documentation

◆ p_context

void const* intc_irq_instance_ctrl_t::p_context

Placeholder for user data. Passed to the user callback in external_irq_callback_args_t.

Function Documentation

◆ R_INTC_IRQ_ExternalIrqOpen()

fsp_err_t R_INTC_IRQ_ExternalIrqOpen	(	external_irq_ctrl_t *const	p_api_ctrl,
		external_irq_cfg_t const *const	p_cfg
	)

Configure an IRQ input pin for use with the external interrupt interface. Implements external_irq_api_t::open.

The Open function is responsible for preparing an external IRQ pin for operation.

Return values

FSP_SUCCESS	Open successful.
FSP_ERR_ASSERTION	One of the following is invalid: p_ctrl or p_cfg is NULL
FSP_ERR_ALREADY_OPEN	The channel specified has already been opened. No configurations were changed. Call the associated Close function to reconfigure the channel.
FSP_ERR_IP_CHANNEL_NOT_PRESENT	The channel requested in p_cfg is not available on the device selected in r_bsp_cfg.h.
FSP_ERR_UNSUPPORTED	An input argument is not supported by selected mode.

Note: This function is reentrant for different channels. It is not reentrant for the same channel.

◆ R_INTC_IRQ_ExternalIrqEnable()

fsp_err_t R_INTC_IRQ_ExternalIrqEnable ( external_irq_ctrl_t *const p_api_ctrl )

Enable external interrupt for specified channel. Implements external_irq_api_t::enable.

Return values

FSP_SUCCESS	Interrupt Enabled successfully.
FSP_ERR_ASSERTION	The p_ctrl parameter was null.
FSP_ERR_NOT_OPEN	The channel is not opened.
FSP_ERR_IRQ_BSP_DISABLED	Requested IRQ is not defined in this system.

◆ R_INTC_IRQ_ExternalIrqDisable()

fsp_err_t R_INTC_IRQ_ExternalIrqDisable ( external_irq_ctrl_t *const p_api_ctrl )

Disable external interrupt for specified channel. Implements external_irq_api_t::disable.

Return values

FSP_SUCCESS	Interrupt disabled successfully.
FSP_ERR_ASSERTION	The p_ctrl parameter was null.
FSP_ERR_NOT_OPEN	The channel is not opened.
FSP_ERR_IRQ_BSP_DISABLED	Requested IRQ is not defined in this system.

◆ R_INTC_IRQ_ExternalIrqCallbackSet()

fsp_err_t R_INTC_IRQ_ExternalIrqCallbackSet	(	external_irq_ctrl_t *const	p_api_ctrl,
		void()(external_irq_callback_args_t )	p_callback,
		void const *const	p_context,
		external_irq_callback_args_t *const	p_callback_memory
	)

Updates the user callback and has option of providing memory for callback structure. Implements external_irq_api_t::callbackSet.

Return values

FSP_SUCCESS	Callback updated successfully.
FSP_ERR_ASSERTION	A required pointer is NULL.
FSP_ERR_NOT_OPEN	The control block has not been opened.
FSP_ERR_NO_CALLBACK_MEMORY	p_callback is non-secure and p_callback_memory is either secure or NULL.

◆ R_INTC_IRQ_ExternalIrqClose()

fsp_err_t R_INTC_IRQ_ExternalIrqClose ( external_irq_ctrl_t *const p_api_ctrl )

Close the external interrupt channel. Implements external_irq_api_t::close.

Return values

FSP_SUCCESS	Successfully closed.
FSP_ERR_ASSERTION	The parameter p_ctrl is NULL.
FSP_ERR_NOT_OPEN	The channel is not opened.

Functions

Detailed Description

Overview

Features

Configuration

Build Time Configurations for r_intc_irq

Configurations for Input > External IRQ Driver on r_intc_irq

Clock Configuration

Pin Configuration

Limitation

Usage Notes

Examples

Basic Example

Data Structures

Data Structure Documentation

◆ intc_irq_instance_ctrl_t

Data Fields

Field Documentation

◆ p_context

Function Documentation

◆ R_INTC_IRQ_ExternalIrqOpen()

◆ R_INTC_IRQ_ExternalIrqEnable()

◆ R_INTC_IRQ_ExternalIrqDisable()

◆ R_INTC_IRQ_ExternalIrqCallbackSet()

◆ R_INTC_IRQ_ExternalIrqClose()