85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/**
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****************************************************************************************
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*
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* @file exti.h
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*
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* @brief Header file - EXTI Driver
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*
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****************************************************************************************
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*/
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#ifndef _EXTI_H_
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#define _EXTI_H_
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#include <stdint.h>
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#include "reg_exti.h"
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/*
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* DEFINES
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****************************************************************************************
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*/
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/// Debounce for EXTI: 'psc'(prescaler 0~255 clk cycles) * 'cnt'(count 0~7)
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#define EXTI_DBC(psc, cnt) (((psc) << 8) | (cnt))
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/// SourceBit of EXTI: 'pa'(pad PA00~19)
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#define EXTI_SRC(pa) (1UL << (pa))
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/// Type of EXTI local src
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enum exti_loca_typ
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{
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EXTI_IER = 0, // w interrupt enable
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EXTI_IDR = 1, // w interrupt disable
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EXTI_IVS = 2, // r interrupt valid status
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EXTI_RIF = 3, // r raw interrupt flag status
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EXTI_IFM = 4, // r interrupt flag masked status
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EXTI_ICR = 5, // w interrupt clear
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EXTI_RTS = 6, // rw rising edge trigger selection
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EXTI_FTS = 7, // rw falling edge trigger selection
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EXTI_SWI = 8, // rw software interrupt event
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EXTI_ADTE = 9, // rw ad trigger enable
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EXTI_DBE = 10, // rw input debounce enable
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};
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/*
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* FUNCTION DECLARATION
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****************************************************************************************
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*/
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/**
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****************************************************************************************
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* @brief Init EXTI, enable clk and rst, config debounce
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*
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* @param[in] dbc debounce for IO, @see EXTI_DBC(psc, cnt)
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*
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****************************************************************************************
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*/
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void exti_init(uint16_t dbc);
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/**
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****************************************************************************************
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* @brief Enable Bits Field of BUS Register
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*
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* @param[in] typ Type of local src @see enum exti_loca_typ
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* @param[in] loca Value Bits of local src @see EXTI_SRC(pa)
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*
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****************************************************************************************
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*/
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void exti_set(uint8_t typ, uint32_t loca);
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/**
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****************************************************************************************
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* @brief Get EXTI local src value
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*
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* @param[in] typ Type of local src @see enum exti_loca_typ
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*
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* @return local src value
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****************************************************************************************
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*/
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uint32_t exti_get(uint8_t typ);
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#endif
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