teensy-cores/teensy4/HardwareSerial6.cpp

/* Teensyduino Core Library
 * http://www.pjrc.com/teensy/
 * Copyright (c) 2019 PJRC.COM, LLC.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * 1. The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * 2. If the Software is incorporated into a build system that allows
 * selection among a list of target devices, then similar target
 * devices manufactured by PJRC.COM must be included in the list of
 * target devices and selectable in the same manner.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <Arduino.h>
#include "HardwareSerial.h"

#ifndef SERIAL6_TX_BUFFER_SIZE
#define SERIAL6_TX_BUFFER_SIZE     40 // number of outgoing bytes to buffer
#endif
#ifndef SERIAL6_RX_BUFFER_SIZE
#define SERIAL6_RX_BUFFER_SIZE     64 // number of incoming bytes to buffer
#endif
#define IRQ_PRIORITY  64  // 0 = highest priority, 255 = lowest

void IRQHandler_Serial6()
{
	Serial6.IRQHandler();
}

void serial_event_check_serial6()
{
	if (Serial6.available()) serialEvent6();
}


// Serial6
static BUFTYPE tx_buffer6[SERIAL6_TX_BUFFER_SIZE];
static BUFTYPE rx_buffer6[SERIAL6_RX_BUFFER_SIZE];
uint32_t IOMUXC_LPUART1_RX_SELECT_INPUT;		// bugbug - does not exist so hack

static HardwareSerial::hardware_t UART1_Hardware = {
	5, IRQ_LPUART1, &IRQHandler_Serial6, &serial_event_check_serial6,
	CCM_CCGR5, CCM_CCGR5_LPUART1(CCM_CCGR_ON),
	25, //IOMUXC_SW_MUX_CTL_PAD_GPIO_AD_B0_13, // pin 25
	24, //IOMUXC_SW_MUX_CTL_PAD_GPIO_AD_B0_12, // pin 24
	0xff, // No CTS pin
	IOMUXC_LPUART1_RX_SELECT_INPUT,
	2, // page 486
	2, // page 485
	0, // No CTS
	0, // ??? Does not have one ???
	IRQ_PRIORITY, 38, 24, // IRQ, rts_low_watermark, rts_high_watermark

};

HardwareSerial Serial6(&IMXRT_LPUART1, &UART1_Hardware, tx_buffer6, SERIAL6_TX_BUFFER_SIZE,
	rx_buffer6,  SERIAL6_RX_BUFFER_SIZE);

void serialEvent6() __attribute__((weak));
void serialEvent6() {Serial6.disableSerialEvents(); }		// No use calling this so disable if called...