mirror of
https://github.com/halleysfifthinc/AVCLAN-Mockingboard.git
synced 2026-08-06 17:03:17 +00:00
Allen Hill
140 lines
3.8 KiB
C
140 lines
3.8 KiB
C
/*
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AVCLAN-Mockingboard
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Copyright (C) 2015 Allen Hill <allenofthehills@gmail.com>
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Portions of the following source code are based on code that is
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copyright (C) 2006 Marcin Slonicki <marcin@softservice.com.pl>
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copyright (C) 2007 Louis Frigon
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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 3 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <avr/interrupt.h>
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#include <avr/io.h>
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#include <avr/sfr_defs.h>
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#include <stdint.h>
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#include "com232.h"
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#include "timing.h"
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#if USART_RXMODE == USART_RXMODE_CLK2X_gc
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#define RXMODE_S 8
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#elif USART_RXMODE == USART_RXMODE_NORMAL_gc
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#define RXMODE_S 16
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#endif
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#define USART_BAUD_RATE(BAUD_RATE) \
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(uint16_t)((float)(F_CPU * 64 / (RXMODE_S * (float)BAUD_RATE)) + 0.5)
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uint8_t RS232_RxCharBuffer[25], RS232_RxCharBegin, RS232_RxCharEnd;
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void RS232_Init(void) {
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RS232_RxCharBegin = RS232_RxCharEnd = 0;
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PORTMUX.CTRLB = PORTMUX_USART0_ALTERNATE_gc; // Use PA1/PA2 for TxD/RxD
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PORTA.DIRSET = PIN1_bm;
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PORTA.DIRCLR = PIN2_bm;
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USART0.CTRLA = USART_RXCIE_bm; // Enable receive interrupts
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USART0.CTRLB = USART_RXEN_bm | USART_TXEN_bm | // Enable Rx/Tx and set receive
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USART_RXMODE; // mode
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USART0.CTRLC = USART_CMODE_ASYNCHRONOUS_gc | USART_PMODE_DISABLED_gc |
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USART_CHSIZE_8BIT_gc |
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USART_SBMODE_1BIT_gc; // Async UART with 8N1 config
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USART0.BAUD = USART_BAUD_RATE(1200000);
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}
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ISR(USART0_RXC_vect) {
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// Store received character to the End of Buffer
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RS232_RxCharBuffer[RS232_RxCharEnd] = USART0_RXDATAL;
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RS232_RxCharEnd++;
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}
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void RS232_SendByte(uint8_t Data) {
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loop_until_bit_is_set(USART0_STATUS,
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USART_DREIF_bp); // wait for UART to become available
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USART0_TXDATAL = Data; // send character
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}
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void RS232_sendbytes(const uint8_t *bytes, uint8_t len) {
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for (uint8_t i = 0; i < len; i++) {
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RS232_SendByte(bytes[i]);
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}
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}
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void RS232_Print(const char *pBuf) {
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register uint8_t c;
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while ((c = *pBuf++)) {
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if (c == '\n')
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RS232_SendByte('\r');
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RS232_SendByte(c);
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}
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}
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void RS232_PrintHex4(uint8_t Data) {
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uint8_t Character = Data & 0x0f;
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Character += '0';
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if (Character > '9')
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Character += 'A' - '0' - 10;
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RS232_SendByte(Character);
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}
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void RS232_PrintHex8(uint8_t Data) {
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RS232_PrintHex4(Data >> 4);
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RS232_PrintHex4(Data);
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}
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void RS232_PrintHex12(uint16_t x) {
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RS232_PrintHex4(*(((uint8_t *)&x) + 1));
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RS232_PrintHex8(*(((uint8_t *)&x) + 0));
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}
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void RS232_PrintHex(uint16_t x) {
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if (x > 0x0fff) {
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RS232_PrintHex8(*(((uint8_t *)&x) + 1));
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} else if (x > 0xff) {
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RS232_PrintHex4(*(((uint8_t *)&x) + 1));
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}
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if (x > 0x0f) {
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RS232_PrintHex8(*(((uint8_t *)&x) + 0));
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} else {
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RS232_PrintHex4(*(((uint8_t *)&x) + 0));
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}
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}
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void RS232_PrintDec(uint8_t Data) {
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if (Data > 99) {
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RS232_SendByte('*');
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return;
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}
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if (Data < 10) {
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RS232_SendByte('0' + Data);
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return;
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}
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uint8_t c;
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unsigned short v, v1;
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v = Data;
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v1 = v / 10;
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c = '0' + (v - v1 * 10);
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RS232_SendByte('0' + v1);
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RS232_SendByte(c);
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}
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void RS232_PrintDec2(uint8_t Data) {
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if (Data < 10)
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RS232_SendByte('0');
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RS232_PrintDec(Data);
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}
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