HackRF-Treasure-Chest/Software/portapack-mayhem/firmware/application/irq_lcd_frame.cpp
2022-09-22 09:26:57 -07:00

69 lines
1.7 KiB
C++

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