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/*
* The MIT License (MIT)
*
* Copyright (c) 2022 Jerzy Kasenberg
*
* 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:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* 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.
*
* This file is part of the TinyUSB stack.
*/
#include <stdint.h>
#include <stdbool.h>
#include <xc.h>
#include "tusb.h"
/* JTAG on, WDT off */
#pragma config FDMTEN=0, FSOSCEN=0, DMTCNT=1
#pragma config DEBUG=ON
#pragma config JTAGEN=ON
#pragma config FSLEEP=OFF
#pragma config TRCEN=OFF
#pragma config ICESEL=ICS_PGx2
#pragma config POSCMOD = EC
#pragma config FNOSC = SPLL
/* 24MHz posc input to pll, div by 3, multiply by 50, div by 2 -> 200mhz*/
#pragma config FPLLICLK=0, FPLLIDIV=DIV_3, FPLLRNG=RANGE_5_10_MHZ, FPLLMULT=MUL_50, FPLLODIV=DIV_2
#pragma config FUSBIDIO=1
#pragma config WINDIS=NORMAL
#pragma config WDTSPGM=1
#pragma config WDTPS=15
#pragma config FWDTEN=OFF
void button_init(void)
{
// RB12 - button
// ANSELB B12 not analog
ANSELBCLR = TU_BIT(12);
// TRISB B12 input
TRISBSET = TU_BIT(12);
// Pull-up
CNPUBSET = TU_BIT(12);
}
void led_init(void)
{
// RB8 - LED
// ANASELB RB8 not analog
ANSELBCLR = TU_BIT(8);
// TRISH RH2 output
TRISBCLR = TU_BIT(8);
// Initial value 0, LED off
LATBCLR = TU_BIT(8);
}
void uart_init(void)
{
// RD4/RD0 Uart4 TX/RX
// ANSELD - not present on 64 pin device
/* Unlock system for PPS configuration */
SYSKEY = 0x00000000;
SYSKEY = 0xAA996655;
SYSKEY = 0x556699AA;
CFGCONbits.IOLOCK = 0;
// PPS Input Remapping
// U4RX -> RD0
U4RXR = 3;
// PPS Output Remapping
// RD4 -> U4TX
RPD4R = 2;
// Lock back the system after PPS configuration
CFGCONbits.IOLOCK = 1;
SYSKEY = 0x00000000;
// UART4
// High speed mode
// 8 bits, no parity, no RTS/CTS, no flow control
U4MODE = 0x0;
// Enable UART2 Receiver and Transmitter
U4STASET = (_U4STA_UTXEN_MASK | _U4STA_URXEN_MASK | _U4STA_UTXISEL1_MASK);
// BAUD Rate register Setup
U4BRG = 100000000 / (16 * 115200) + 1;
// Disable Interrupts
IEC4CLR = _IEC5_U4EIE_MASK | _IEC5_U4RXIE_MASK | _IEC5_U4TXIE_MASK;
// Turn ON UART2
U4MODESET = _U4MODE_ON_MASK;
}
//--------------------------------------------------------------------+
// Board porting API
//--------------------------------------------------------------------+
void board_led_write(bool state)
{
if (state)
{
LATBSET = TU_BIT(8);
}
else
{
LATBCLR = TU_BIT(8);
}
}
uint32_t board_button_read(void)
{
return ((PORTB >> 12) & 1) == 0;
}
int board_uart_write(void const * buf, int len)
{
int i = len;
uint8_t const * data = buf;
while (i--)
{
while (U4STAbits.UTXBF) ;
U4TXREG = *data++;
}
return len;
}
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