145 lines
3.6 KiB
C
145 lines
3.6 KiB
C
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2022 Jerzy Kasenberg
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* This file is part of the TinyUSB stack.
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#include <xc.h>
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#include "tusb.h"
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/* JTAG on, WDT off */
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#pragma config FDMTEN=0, FSOSCEN=0, DMTCNT=1
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#pragma config DEBUG=ON
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#pragma config JTAGEN=ON
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#pragma config FSLEEP=OFF
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#pragma config TRCEN=OFF
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#pragma config ICESEL=ICS_PGx2
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#pragma config POSCMOD = EC
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#pragma config FNOSC = SPLL
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/* 24MHz posc input to pll, div by 3, multiply by 50, div by 2 -> 200mhz*/
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#pragma config FPLLICLK=0, FPLLIDIV=DIV_3, FPLLRNG=RANGE_5_10_MHZ, FPLLMULT=MUL_50, FPLLODIV=DIV_2
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#pragma config FUSBIDIO=1
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#pragma config WINDIS=NORMAL
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#pragma config WDTSPGM=1
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#pragma config WDTPS=15
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#pragma config FWDTEN=OFF
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void button_init(void)
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{
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// RB12 - button
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// ANSELB B12 not analog
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ANSELBCLR = TU_BIT(12);
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// TRISB B12 input
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TRISBSET = TU_BIT(12);
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// Pull-up
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CNPUBSET = TU_BIT(12);
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}
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void led_init(void)
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{
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// RB8 - LED
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// ANASELB RB8 not analog
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ANSELBCLR = TU_BIT(8);
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// TRISH RH2 output
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TRISBCLR = TU_BIT(8);
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// Initial value 0, LED off
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LATBCLR = TU_BIT(8);
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}
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void uart_init(void)
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{
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// RD4/RD0 Uart4 TX/RX
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// ANSELD - not present on 64 pin device
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/* Unlock system for PPS configuration */
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SYSKEY = 0x00000000;
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SYSKEY = 0xAA996655;
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SYSKEY = 0x556699AA;
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CFGCONbits.IOLOCK = 0;
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// PPS Input Remapping
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// U4RX -> RD0
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U4RXR = 3;
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// PPS Output Remapping
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// RD4 -> U4TX
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RPD4R = 2;
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// Lock back the system after PPS configuration
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CFGCONbits.IOLOCK = 1;
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SYSKEY = 0x00000000;
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// UART4
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// High speed mode
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// 8 bits, no parity, no RTS/CTS, no flow control
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U4MODE = 0x0;
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// Enable UART2 Receiver and Transmitter
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U4STASET = (_U4STA_UTXEN_MASK | _U4STA_URXEN_MASK | _U4STA_UTXISEL1_MASK);
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// BAUD Rate register Setup
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U4BRG = 100000000 / (16 * 115200) + 1;
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// Disable Interrupts
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IEC4CLR = _IEC5_U4EIE_MASK | _IEC5_U4RXIE_MASK | _IEC5_U4TXIE_MASK;
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// Turn ON UART2
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U4MODESET = _U4MODE_ON_MASK;
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}
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//--------------------------------------------------------------------+
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// Board porting API
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//--------------------------------------------------------------------+
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void board_led_write(bool state)
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{
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if (state)
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{
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LATBSET = TU_BIT(8);
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}
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else
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{
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LATBCLR = TU_BIT(8);
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}
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}
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uint32_t board_button_read(void)
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{
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return ((PORTB >> 12) & 1) == 0;
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}
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int board_uart_write(void const * buf, int len)
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{
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int i = len;
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uint8_t const * data = buf;
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while (i--)
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{
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while (U4STAbits.UTXBF) ;
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U4TXREG = *data++;
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}
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return len;
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}
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