Steins7
7ab6622908
The "specific" lines configuration would not work due to index error in the callback configuration. While fixing the error, simplifying the API by moving the afio calls to the calling context seemed a cleaner way to do things
89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
/** @file exti.h
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* Module handling EXTernal Interrupt lines
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*
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* The module provides functions to configure the exti lines to generate events
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* or interrupts
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*/
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#ifndef _EXTI_H_
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#define _EXTI_H_
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//--includes--------------------------------------------------------------------
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//--type definitions------------------------------------------------------------
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/**
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* Available exti lines. The numbered lines correspond to gpios while the
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* remaining are directly mapped to peripherals
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*/
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enum ExtiLine {
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EXTI_LINE_0 = (0x1 << 0),
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EXTI_LINE_1 = (0x1 << 1),
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EXTI_LINE_2 = (0x1 << 2),
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EXTI_LINE_3 = (0x1 << 3),
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EXTI_LINE_4 = (0x1 << 4),
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EXTI_LINE_5 = (0x1 << 5),
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EXTI_LINE_6 = (0x1 << 6),
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EXTI_LINE_7 = (0x1 << 7),
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EXTI_LINE_8 = (0x1 << 8),
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EXTI_LINE_9 = (0x1 << 9),
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EXTI_LINE_10 = (0x1 << 10),
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EXTI_LINE_11 = (0x1 << 11),
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EXTI_LINE_12 = (0x1 << 12),
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EXTI_LINE_13 = (0x1 << 13),
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EXTI_LINE_14 = (0x1 << 14),
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EXTI_LINE_15 = (0x1 << 15),
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EXTI_LINE_PVD = (0x1 << 16),
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EXTI_LINE_RTC = (0x1 << 17),
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EXTI_LINE_USB = (0x1 << 18),
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};
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/**
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* Available configurations for exti lines. These configurations apply to both
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* regular and specific lines and can be used together on a single line
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*/
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enum ExtiConfig {
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EXTI_CONFIG_RISING_EDGE = (0x1 << 0),
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EXTI_CONFIG_FALLING_EDGE = (0x1 << 1),
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};
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typedef void (*ExtiCallback)(void);
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//--functions-------------------------------------------------------------------
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/**
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* Configure lines to call a single callback. The ExtiLine enum can be used as a
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* mask to configure multiple lines at the same time.
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*
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* Every numbered line must be linked to a gpio port using afio_map_exti(). Each
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* line is linked to the pins of the same id (ex : pin 1 for exti 1). When
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* possible, it is recommended to use the lowest id possible for better
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* performance. Each pin must be configured independently through the gpio
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* driver module
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*
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* The remaining lines are linked to specific peripherals which must be
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* configured independently through the corresponding driver module.
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*
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* The ExtiConfig enum can be used as mask. If no callback is specified, the
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* interrupt won't be enabled, but an event will still be sent to wake the cpu
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* up.
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*/
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void exti_configure(enum ExtiLine line_mask, enum ExtiConfig config_mask,
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ExtiCallback callback);
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/**
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* Resets lines. The ExtiLine enum can be used as a mask to reset multiple lines
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* at the same time
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*/
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void exti_reset(enum ExtiLine line_mask);
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/**
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* Resets all lines. The exti peripheral is returned to its reset configuration
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*/
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void exti_reset_peripheral(void);
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#endif //_EXTI_H_
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