228 lines
6.4 KiB
C
228 lines
6.4 KiB
C
/*!
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\file gd32f30x_exti.c
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\brief EXTI driver
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*/
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/*
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Copyright (C) 2017 GigaDevice
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2017-02-10, V1.0.0, firmware for GD32F30x
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*/
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#include "gd32f30x_exti.h"
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/*!
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\brief deinitialize the EXTI
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\param[in] none
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\param[out] none
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\retval none
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*/
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void exti_deinit(void)
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{
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/* reset the value of all the EXTI registers */
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EXTI_INTEN = (uint32_t)0x00000000U;
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EXTI_EVEN = (uint32_t)0x00000000U;
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EXTI_RTEN = (uint32_t)0x00000000U;
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EXTI_FTEN = (uint32_t)0x00000000U;
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EXTI_SWIEV = (uint32_t)0x00000000U;
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}
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/*!
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\brief initialize the EXTI
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\param[in] linex: EXTI line number, refer to exti_line_enum
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only one parameter can be selected which is shown as below:
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\arg EXTI_x (x=0..19): EXTI line x
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\param[in] mode: interrupt or event mode, refer to exti_mode_enum
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only one parameter can be selected which is shown as below:
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\arg EXTI_INTERRUPT: interrupt mode
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\arg EXTI_EVENT: event mode
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\param[in] trig_type: interrupt trigger type, refer to exti_trig_type_enum
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only one parameter can be selected which is shown as below:
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\arg EXTI_TRIG_RISING: rising edge trigger
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\arg EXTI_TRIG_FALLING: falling trigger
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\arg EXTI_TRIG_BOTH: rising and falling trigger
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\param[out] none
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\retval none
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*/
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void exti_init(exti_line_enum linex, exti_mode_enum mode, exti_trig_type_enum trig_type)
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{
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/* reset the EXTI line x */
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EXTI_INTEN &= ~(uint32_t)linex;
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EXTI_EVEN &= ~(uint32_t)linex;
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EXTI_RTEN &= ~(uint32_t)linex;
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EXTI_FTEN &= ~(uint32_t)linex;
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/* set the EXTI mode and enable the interrupts or events from EXTI line x */
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switch(mode){
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case EXTI_INTERRUPT:
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EXTI_INTEN |= (uint32_t)linex;
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break;
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case EXTI_EVENT:
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EXTI_EVEN |= (uint32_t)linex;
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break;
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default:
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break;
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}
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/* set the EXTI trigger type */
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switch(trig_type){
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case EXTI_TRIG_RISING:
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EXTI_RTEN |= (uint32_t)linex;
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EXTI_FTEN &= ~(uint32_t)linex;
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break;
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case EXTI_TRIG_FALLING:
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EXTI_RTEN &= ~(uint32_t)linex;
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EXTI_FTEN |= (uint32_t)linex;
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break;
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case EXTI_TRIG_BOTH:
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EXTI_RTEN |= (uint32_t)linex;
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EXTI_FTEN |= (uint32_t)linex;
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break;
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default:
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break;
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}
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}
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/*!
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\brief enable the interrupts from EXTI line x
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\param[in] linex: EXTI line number, refer to exti_line_enum
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only one parameter can be selected which is shown as below:
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\arg EXTI_x (x=0..19): EXTI line x
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\param[out] none
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\retval none
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*/
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void exti_interrupt_enable(exti_line_enum linex)
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{
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EXTI_INTEN |= (uint32_t)linex;
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}
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/*!
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\brief enable the events from EXTI line x
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\param[in] linex: EXTI line number, refer to exti_line_enum
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only one parameter can be selected which is shown as below:
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\arg EXTI_x (x=0..19): EXTI line x
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\param[out] none
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\retval none
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*/
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void exti_event_enable(exti_line_enum linex)
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{
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EXTI_EVEN |= (uint32_t)linex;
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}
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/*!
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\brief disable the interrupt from EXTI line x
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\param[in] linex: EXTI line number, refer to exti_line_enum
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only one parameter can be selected which is shown as below:
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\arg EXTI_x (x=0..19): EXTI line x
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\param[out] none
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\retval none
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*/
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void exti_interrupt_disable(exti_line_enum linex)
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{
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EXTI_INTEN &= ~(uint32_t)linex;
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}
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/*!
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\brief disable the events from EXTI line x
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\param[in] linex: EXTI line number, refer to exti_line_enum
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only one parameter can be selected which is shown as below:
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\arg EXTI_x (x=0..19): EXTI line x
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\param[out] none
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\retval none
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*/
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void exti_event_disable(exti_line_enum linex)
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{
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EXTI_EVEN &= ~(uint32_t)linex;
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}
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/*!
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\brief get EXTI lines flag
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\param[in] linex: EXTI line number, refer to exti_line_enum
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only one parameter can be selected which is shown as below:
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\arg EXTI_x (x=0..19): EXTI line x
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\param[out] none
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\retval FlagStatus: status of flag (RESET or SET)
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*/
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FlagStatus exti_flag_get(exti_line_enum linex)
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{
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if(RESET != (EXTI_PD & (uint32_t)linex)){
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return SET;
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}else{
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return RESET;
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}
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}
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/*!
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\brief clear EXTI lines pending flag
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\param[in] linex: EXTI line number, refer to exti_line_enum
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only one parameter can be selected which is shown as below:
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\arg EXTI_x (x=0..19): EXTI line x
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\param[out] none
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\retval none
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*/
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void exti_flag_clear(exti_line_enum linex)
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{
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EXTI_PD = (uint32_t)linex;
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}
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/*!
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\brief get EXTI lines flag when the interrupt flag is set
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\param[in] linex: EXTI line number, refer to exti_line_enum
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only one parameter can be selected which is shown as below:
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\arg EXTI_x (x=0..19): EXTI line x
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\param[out] none
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\retval FlagStatus: status of flag (RESET or SET)
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*/
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FlagStatus exti_interrupt_flag_get(exti_line_enum linex)
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{
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uint32_t flag_left, flag_right;
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flag_left = EXTI_PD & (uint32_t)linex;
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flag_right = EXTI_INTEN & (uint32_t)linex;
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if((RESET != flag_left) && (RESET != flag_right)){
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return SET;
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}else{
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return RESET;
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}
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}
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/*!
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\brief clear EXTI lines pending flag
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\param[in] linex: EXTI line number, refer to exti_line_enum
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only one parameter can be selected which is shown as below:
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\arg EXTI_x (x=0..19): EXTI line x
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\param[out] none
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\retval none
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*/
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void exti_interrupt_flag_clear(exti_line_enum linex)
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{
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EXTI_PD = (uint32_t)linex;
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}
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/*!
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\brief enable EXTI software interrupt event
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\param[in] linex: EXTI line number, refer to exti_line_enum
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only one parameter can be selected which is shown as below:
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\arg EXTI_x (x=0..19): EXTI line x
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\param[out] none
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\retval none
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*/
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void exti_software_interrupt_enable(exti_line_enum linex)
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{
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EXTI_SWIEV |= (uint32_t)linex;
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}
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/*!
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\brief disable EXTI software interrupt event
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\param[in] linex: EXTI line number, refer to exti_line_enum
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only one parameter can be selected which is shown as below:
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\arg EXTI_x (x=0..19): EXTI line x
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\param[out] none
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\retval none
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*/
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void exti_software_interrupt_disable(exti_line_enum linex)
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{
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EXTI_SWIEV &= ~(uint32_t)linex;
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}
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