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255 lines
8.1 KiB
255 lines
8.1 KiB
/*!
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\file gd32vf103_exti.c
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\brief EXTI driver
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\version 2019-06-05, V1.0.0, firmware for GD32VF103
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*/
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/*
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Copyright (c) 2019, GigaDevice Semiconductor Inc.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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OF SUCH DAMAGE.
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*/
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#include "gd32vf103_exti.h"
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#define EXTI_REG_RESET_VALUE ((uint32_t)0x00000000U)
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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 = EXTI_REG_RESET_VALUE;
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EXTI_EVEN = EXTI_REG_RESET_VALUE;
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EXTI_RTEN = EXTI_REG_RESET_VALUE;
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EXTI_FTEN = EXTI_REG_RESET_VALUE;
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EXTI_SWIEV = EXTI_REG_RESET_VALUE;
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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..18): 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: 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 edge trigger
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\arg EXTI_TRIG_BOTH: rising edge and falling edge trigger
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\arg EXTI_TRIG_NONE: without rising edge or falling edge 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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case EXTI_TRIG_NONE:
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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..18): 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..18): 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..18): 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..18): 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..18): 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..18): 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..18): 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..18): 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..18): 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..18): 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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