69 lines
1.7 KiB
C++
69 lines
1.7 KiB
C++
/*
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* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "irq_lcd_frame.hpp"
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#include "event_m0.hpp"
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#include "ch.h"
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#include "hal.h"
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#include "portapack_hal.hpp"
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static Thread* thread_lcd_frame_event = NULL;
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static void pin_int4_interrupt_enable() {
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thread_lcd_frame_event = chThdSelf();
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nvicEnableVector(PIN_INT4_IRQn, CORTEX_PRIORITY_MASK(LPC43XX_PIN_INT4_IRQ_PRIORITY));
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}
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void lcd_frame_sync_configure() {
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/* Positive edge sensitivity */
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LPC_GPIO_INT->ISEL &= ~(1U << 4);
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LPC_GPIO_INT->SIENR = (1U << 4);
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LPC_GPIO_INT->CIENF = (1U << 4);
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LPC_GPIO_INT->IST = (1U << 4);
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LPC_SCU->PINTSEL1 =
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(LPC_SCU->PINTSEL1 & ~(0xffU << 0))
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| (portapack::gpio_lcd_te.pad() << 0)
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| (portapack::gpio_lcd_te.port() << 5)
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;
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pin_int4_interrupt_enable();
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}
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extern "C" {
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CH_IRQ_HANDLER(PIN_INT4_IRQHandler) {
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CH_IRQ_PROLOGUE();
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chSysLockFromIsr();
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chEvtSignalI(thread_lcd_frame_event, EVT_MASK_LCD_FRAME_SYNC);
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chSysUnlockFromIsr();
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LPC_GPIO_INT->IST = (1U << 4);
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CH_IRQ_EPILOGUE();
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}
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}
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