230 lines
6.4 KiB
C
230 lines
6.4 KiB
C
|
/*!
|
||
|
|
\file gd32f4xx_exti.c
|
||
|
|
\brief EXTI driver
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
Copyright (C) 2016 GigaDevice
|
||
|
|
|
||
|
|
2016-08-15, V1.0.0, firmware for GD32F4xx
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "gd32f4xx_exti.h"
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief deinitialize the EXTI
|
||
|
|
\param[in] none
|
||
|
|
\param[out] none
|
||
|
|
\retval none
|
||
|
|
*/
|
||
|
|
void exti_deinit(void)
|
||
|
|
{
|
||
|
|
/* reset the value of all the EXTI registers */
|
||
|
|
EXTI_INTEN = (uint32_t)0x00000000U;
|
||
|
|
EXTI_EVEN = (uint32_t)0x00000000U;
|
||
|
|
EXTI_RTEN = (uint32_t)0x00000000U;
|
||
|
|
EXTI_FTEN = (uint32_t)0x00000000U;
|
||
|
|
EXTI_SWIEV = (uint32_t)0x00000000U;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief initialize the EXTI
|
||
|
|
\param[in] linex: EXTI line number, refer to exti_line_enum
|
||
|
|
only one parameter can be selected which is shown as below:
|
||
|
|
\arg EXTI_x (x=0..22): EXTI line x
|
||
|
|
\param[in] mode: interrupt or event mode, refer to exti_mode_enum
|
||
|
|
only one parameter can be selected which is shown as below:
|
||
|
|
\arg EXTI_INTERRUPT: interrupt mode
|
||
|
|
\arg EXTI_EVENT: event mode
|
||
|
|
\param[in] trig_type: interrupt trigger type, refer to exti_trig_type_enum
|
||
|
|
only one parameter can be selected which is shown as below:
|
||
|
|
\arg EXTI_TRIG_RISING: rising edge trigger
|
||
|
|
\arg EXTI_TRIG_FALLING: falling trigger
|
||
|
|
\arg EXTI_TRIG_BOTH: rising and falling trigger
|
||
|
|
\param[out] none
|
||
|
|
\retval none
|
||
|
|
*/
|
||
|
|
void exti_init(exti_line_enum linex, \
|
||
|
|
exti_mode_enum mode, \
|
||
|
|
exti_trig_type_enum trig_type)
|
||
|
|
{
|
||
|
|
/* reset the EXTI line x */
|
||
|
|
EXTI_INTEN &= ~(uint32_t)linex;
|
||
|
|
EXTI_EVEN &= ~(uint32_t)linex;
|
||
|
|
EXTI_RTEN &= ~(uint32_t)linex;
|
||
|
|
EXTI_FTEN &= ~(uint32_t)linex;
|
||
|
|
|
||
|
|
/* set the EXTI mode and enable the interrupts or events from EXTI line x */
|
||
|
|
switch(mode){
|
||
|
|
case EXTI_INTERRUPT:
|
||
|
|
EXTI_INTEN |= (uint32_t)linex;
|
||
|
|
break;
|
||
|
|
case EXTI_EVENT:
|
||
|
|
EXTI_EVEN |= (uint32_t)linex;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* set the EXTI trigger type */
|
||
|
|
switch(trig_type){
|
||
|
|
case EXTI_TRIG_RISING:
|
||
|
|
EXTI_RTEN |= (uint32_t)linex;
|
||
|
|
EXTI_FTEN &= ~(uint32_t)linex;
|
||
|
|
break;
|
||
|
|
case EXTI_TRIG_FALLING:
|
||
|
|
EXTI_RTEN &= ~(uint32_t)linex;
|
||
|
|
EXTI_FTEN |= (uint32_t)linex;
|
||
|
|
break;
|
||
|
|
case EXTI_TRIG_BOTH:
|
||
|
|
EXTI_RTEN |= (uint32_t)linex;
|
||
|
|
EXTI_FTEN |= (uint32_t)linex;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief enable the interrupts from EXTI line x
|
||
|
|
\param[in] linex: EXTI line number, refer to exti_line_enum
|
||
|
|
only one parameter can be selected which is shown as below:
|
||
|
|
\arg EXTI_x (x=0..22): EXTI line x
|
||
|
|
\param[out] none
|
||
|
|
\retval none
|
||
|
|
*/
|
||
|
|
void exti_interrupt_enable(exti_line_enum linex)
|
||
|
|
{
|
||
|
|
EXTI_INTEN |= (uint32_t)linex;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief enable the events from EXTI line x
|
||
|
|
\param[in] linex: EXTI line number, refer to exti_line_enum
|
||
|
|
only one parameter can be selected which is shown as below:
|
||
|
|
\arg EXTI_x (x=0..22): EXTI line x
|
||
|
|
\param[out] none
|
||
|
|
\retval none
|
||
|
|
*/
|
||
|
|
void exti_event_enable(exti_line_enum linex)
|
||
|
|
{
|
||
|
|
EXTI_EVEN |= (uint32_t)linex;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief disable the interrupt from EXTI line x
|
||
|
|
\param[in] linex: EXTI line number, refer to exti_line_enum
|
||
|
|
only one parameter can be selected which is shown as below:
|
||
|
|
\arg EXTI_x (x=0..22): EXTI line x
|
||
|
|
\param[out] none
|
||
|
|
\retval none
|
||
|
|
*/
|
||
|
|
void exti_interrupt_disable(exti_line_enum linex)
|
||
|
|
{
|
||
|
|
EXTI_INTEN &= ~(uint32_t)linex;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief disable the events from EXTI line x
|
||
|
|
\param[in] linex: EXTI line number, refer to exti_line_enum
|
||
|
|
only one parameter can be selected which is shown as below:
|
||
|
|
\arg EXTI_x (x=0..22): EXTI line x
|
||
|
|
\param[out] none
|
||
|
|
\retval none
|
||
|
|
*/
|
||
|
|
void exti_event_disable(exti_line_enum linex)
|
||
|
|
{
|
||
|
|
EXTI_EVEN &= ~(uint32_t)linex;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief get EXTI lines flag
|
||
|
|
\param[in] linex: EXTI line number, refer to exti_line_enum
|
||
|
|
only one parameter can be selected which is shown as below:
|
||
|
|
\arg EXTI_x (x=0..22): EXTI line x
|
||
|
|
\param[out] none
|
||
|
|
\retval FlagStatus: status of flag (RESET or SET)
|
||
|
|
*/
|
||
|
|
FlagStatus exti_flag_get(exti_line_enum linex)
|
||
|
|
{
|
||
|
|
if(RESET != (EXTI_PD & (uint32_t)linex)){
|
||
|
|
return SET;
|
||
|
|
}else{
|
||
|
|
return RESET;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief clear EXTI lines pending flag
|
||
|
|
\param[in] linex: EXTI line number, refer to exti_line_enum
|
||
|
|
only one parameter can be selected which is shown as below:
|
||
|
|
\arg EXTI_x (x=0..22): EXTI line x
|
||
|
|
\param[out] none
|
||
|
|
\retval none
|
||
|
|
*/
|
||
|
|
void exti_flag_clear(exti_line_enum linex)
|
||
|
|
{
|
||
|
|
EXTI_PD = (uint32_t)linex;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief get EXTI lines flag when the interrupt flag is set
|
||
|
|
\param[in] linex: EXTI line number, refer to exti_line_enum
|
||
|
|
only one parameter can be selected which is shown as below:
|
||
|
|
\arg EXTI_x (x=0..22): EXTI line x
|
||
|
|
\param[out] none
|
||
|
|
\retval FlagStatus: status of flag (RESET or SET)
|
||
|
|
*/
|
||
|
|
FlagStatus exti_interrupt_flag_get(exti_line_enum linex)
|
||
|
|
{
|
||
|
|
uint32_t flag_left, flag_right;
|
||
|
|
|
||
|
|
flag_left = EXTI_PD & (uint32_t)linex;
|
||
|
|
flag_right = EXTI_INTEN & (uint32_t)linex;
|
||
|
|
|
||
|
|
if((RESET != flag_left) && (RESET != flag_right)){
|
||
|
|
return SET;
|
||
|
|
}else{
|
||
|
|
return RESET;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief clear EXTI lines pending flag
|
||
|
|
\param[in] linex: EXTI line number, refer to exti_line_enum
|
||
|
|
only one parameter can be selected which is shown as below:
|
||
|
|
\arg EXTI_x (x=0..22): EXTI line x
|
||
|
|
\param[out] none
|
||
|
|
\retval none
|
||
|
|
*/
|
||
|
|
void exti_interrupt_flag_clear(exti_line_enum linex)
|
||
|
|
{
|
||
|
|
EXTI_PD = (uint32_t)linex;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief enable EXTI software interrupt event
|
||
|
|
\param[in] linex: EXTI line number, refer to exti_line_enum
|
||
|
|
only one parameter can be selected which is shown as below:
|
||
|
|
\arg EXTI_x (x=0..22): EXTI line x
|
||
|
|
\param[out] none
|
||
|
|
\retval none
|
||
|
|
*/
|
||
|
|
void exti_software_interrupt_enable(exti_line_enum linex)
|
||
|
|
{
|
||
|
|
EXTI_SWIEV |= (uint32_t)linex;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief disable EXTI software interrupt event
|
||
|
|
\param[in] linex: EXTI line number, refer to exti_line_enum
|
||
|
|
only one parameter can be selected which is shown as below:
|
||
|
|
\arg EXTI_x (x=0..22): EXTI line x
|
||
|
|
\param[out] none
|
||
|
|
\retval none
|
||
|
|
*/
|
||
|
|
void exti_software_interrupt_disable(exti_line_enum linex)
|
||
|
|
{
|
||
|
|
EXTI_SWIEV &= ~(uint32_t)linex;
|
||
|
|
}
|