88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/*
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* ackbtn-stm32f103.c - Acknowledge button support for STM32F103
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*
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* Copyright (C) 2018 g10 Code GmbH
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* Author: NIIBE Yutaka <gniibe@fsij.org>
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*
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* This file is a part of Chopstx, a thread library for embedded.
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*
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* Chopstx is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Chopstx is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* As additional permission under GNU GPL version 3 section 7, you may
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* distribute non-source form of the Program without the copy of the
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* GNU GPL normally required by section 4, provided you inform the
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* receipents of GNU GPL by a written offer.
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*
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*/
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#include <stdint.h>
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#include <string.h>
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#include <chopstx.h>
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#include "board.h"
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#include "mcu/stm32f103.h"
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static uint32_t pin_config;
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void
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ackbtn_init (chopstx_intr_t *intr)
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{
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uint8_t irq_num;
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uint32_t afio_exticr_index;
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uint32_t afio_exticr_extiX_pY;
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int rising_edge;
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switch (SYS_BOARD_ID)
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{
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case BOARD_ID_FST_01SZ:
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default:
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/* PA3 is connected to a hall sensor DRV5032FA */
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afio_exticr_index = 0;
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afio_exticr_extiX_pY = AFIO_EXTICR1_EXTI3_PA;
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irq_num = EXTI3_IRQ;
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pin_config = 0x0008; /* EXTI_PR_PR3 == EXTI_IMR_MR3 == EXTI_RTSR_TR3 */
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rising_edge = 1;
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break;
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}
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chopstx_claim_irq (intr, irq_num);
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/* Configure EXTI line */
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if (afio_exticr_extiX_pY)
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AFIO->EXTICR[afio_exticr_index] |= afio_exticr_extiX_pY;
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/* Interrupt is masked, now */
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EXTI->IMR &= ~pin_config;
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/* Configure which edge is detected */
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if (rising_edge)
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EXTI->RTSR |= pin_config;
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else
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EXTI->FTSR |= pin_config;
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}
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void
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ackbtn_enable (void)
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{
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EXTI->PR |= pin_config; /* Clear pending interrupt */
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EXTI->IMR |= pin_config; /* Enable interrupt clearing the mask */
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}
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void
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ackbtn_disable (void)
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{
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EXTI->IMR &= ~pin_config; /* Disable interrupt having the mask */
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EXTI->PR |= pin_config; /* Clear pending interrupt */
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}
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