SAM External Interrupt Driver.
Copyright (c) 2012-2018 Microchip Technology Inc. and its subsidiaries.
Macros | |
#define | _extint_is_gclk_required(filter_input_signal, detection_criteria) |
Determin if the general clock is required. More... | |
#define | EXTINT_CLOCK_SOURCE GCLK_GENERATOR_0 |
Configuration option, setting the EIC clock source which can be used for EIC edge detection or filtering. More... | |
Functions | |
static void | _extint_disable (void) |
Disables the External Interrupt driver. More... | |
static void | _extint_enable (void) |
Enables the External Interrupt driver. More... | |
void | _system_extint_init (void) |
Initializes and enables the External Interrupt driver. More... | |
void | extint_chan_get_config_defaults (struct extint_chan_conf *const config) |
Initializes an External Interrupt channel configuration structure to defaults. More... | |
void | extint_chan_set_config (const uint8_t channel, const struct extint_chan_conf *const config) |
Writes an External Interrupt channel configuration to the hardware module. More... | |
void | extint_disable_events (struct extint_events *const events) |
Disables an External Interrupt event output. More... | |
void | extint_enable_events (struct extint_events *const events) |
Enables an External Interrupt event output. More... | |
static bool | extint_is_syncing (void) |
Determines if the hardware module(s) are currently synchronizing to the bus. More... | |
enum status_code | extint_nmi_set_config (const uint8_t nmi_channel, const struct extint_nmi_conf *const config) |
Writes an External Interrupt NMI channel configuration to the hardware module. More... | |
Variables | |
struct _extint_module | _extint_dev |
#define _extint_is_gclk_required | ( | filter_input_signal, | |
detection_criteria | |||
) |
Determin if the general clock is required.
[in] | filter_input_signal | Filter the raw input signal to prevent noise |
[in] | detection_criteria | Edge detection mode to use (extint_detect) |
Referenced by extint_chan_set_config(), and extint_nmi_set_config().
#define EXTINT_CLOCK_SOURCE GCLK_GENERATOR_0 |
Configuration option, setting the EIC clock source which can be used for EIC edge detection or filtering.
This option may be overridden in the module configuration header file conf_extint.h
.
Referenced by _system_extint_init(), extint_chan_set_config(), and extint_nmi_set_config().
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static |
Disables the External Interrupt driver.
Disables EIC modules that were previously started via a call to _extint_enable(). Registered callback list will not be affected if callback mode is used.
References extint_is_syncing().
Referenced by extint_nmi_set_config().
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static |
Enables the External Interrupt driver.
Enables EIC modules. Registered callback list will not be affected if callback mode is used.
References extint_is_syncing().
Referenced by _system_extint_init(), and extint_nmi_set_config().
void _system_extint_init | ( | void | ) |
Initializes and enables the External Interrupt driver.
Enable the clocks used by External Interrupt driver.
Resets the External Interrupt driver, resetting all hardware module registers to their power-on defaults, then enable it for further use.
Reset the callback list if callback mode is used.
This function must be called before attempting to use any NMI or standard external interrupt channel functions.
References _extint_dev, _extint_enable(), EIC_NUMBER_OF_INTERRUPTS, EXTINT_CLOCK_SOURCE, extint_is_syncing(), system_gclk_chan_config::source_generator, system_apb_clock_set_mask(), SYSTEM_CLOCK_APB_APBA, system_gclk_chan_enable(), system_gclk_chan_get_config_defaults(), system_gclk_chan_set_config(), system_interrupt_enable(), and SYSTEM_INTERRUPT_MODULE_EIC.
Referenced by system_init().
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inlinestatic |
Determines if the hardware module(s) are currently synchronizing to the bus.
Checks to see if the underlying hardware peripheral module(s) are currently synchronizing across multiple clock domains to the hardware bus, This function can be used to delay further operations on a module until such time that it is ready, to prevent blocking delays for synchronization in the user application.
true | If the module synchronization is ongoing |
false | If the module has completed synchronization |
Referenced by _extint_disable(), _extint_enable(), and _system_extint_init().
struct _extint_module _extint_dev |
Internal driver device instance struct.
Referenced by _system_extint_init(), EIC_Handler(), extint_register_callback(), and extint_unregister_callback().