diff --git a/uart.cpp b/uart.cpp deleted file mode 100644 index 447e918..0000000 --- a/uart.cpp +++ /dev/null @@ -1,754 +0,0 @@ -/************************************************************************* -Title: Interrupt UART library with receive/transmit circular buffers -Author: Peter Fleury http://tinyurl.com/peterfleury -File: $Id: uart.c,v 1.15.2.4 2015/09/05 18:33:32 peter Exp $ -Software: AVR-GCC 4.x -Hardware: any AVR with built-in UART, -License: GNU General Public License - - -DESCRIPTION: - An interrupt is generated when the UART has finished transmitting or - receiving a byte. The interrupt handling routines use circular buffers - for buffering received and transmitted data. - - - The UART_RX_BUFFER_SIZE and UART_TX_BUFFER_SIZE variables define - the buffer size in bytes. Note that these variables must be a - power of 2. - - -USAGE: - Refere to the header file uart.h for a description of the routines. - See also example test_uart.c. - -NOTES: - Based on Atmel Application Note AVR306 - - -LICENSE: - Copyright (C) 2015 Peter Fleury, GNU General Public License Version 3 - - 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 of the License, or - 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. - - -*************************************************************************/ -#include "uart.h" -#include -#include -#include - -/* - * constants and macros - */ - -/* size of RX/TX buffers */ -#define UART_RX_BUFFER_MASK (UART_RX_BUFFER_SIZE - 1) -#define UART_TX_BUFFER_MASK (UART_TX_BUFFER_SIZE - 1) - -#if (UART_RX_BUFFER_SIZE & UART_RX_BUFFER_MASK) -#error RX buffer size is not a power of 2 -#endif -#if (UART_TX_BUFFER_SIZE & UART_TX_BUFFER_MASK) -#error TX buffer size is not a power of 2 -#endif - -#if defined(__AVR_AT90S2313__) || defined(__AVR_AT90S4414__) || defined(__AVR_AT90S8515__) || \ - defined(__AVR_AT90S4434__) || defined(__AVR_AT90S8535__) || defined(__AVR_ATmega103__) -/* old AVR classic or ATmega103 with one UART */ -#define UART0_RECEIVE_INTERRUPT UART_RX_vect -#define UART0_TRANSMIT_INTERRUPT UART_UDRE_vect -#define UART0_STATUS USR -#define UART0_CONTROL UCR -#define UART0_DATA UDR -#define UART0_UDRIE UDRIE -#define UART0_UBRRL UBRR -#define UART0_BIT_U2X U2X -#define UART0_BIT_RXCIE RXCIE -#define UART0_BIT_RXEN RXEN -#define UART0_BIT_TXEN TXEN -#elif defined(__AVR_AT90S2333__) || defined(__AVR_AT90S4433__) -/* old AVR classic with one UART */ -#define UART0_RECEIVE_INTERRUPT UART_RX_vect -#define UART0_TRANSMIT_INTERRUPT UART_UDRE_vect -#define UART0_STATUS UCSRA -#define UART0_CONTROL UCSRB -#define UART0_DATA UDR -#define UART0_UDRIE UDRIE -#define UART0_UBRRL UBRR -#define UART0_BIT_U2X U2X -#define UART0_BIT_RXCIE RXCIE -#define UART0_BIT_RXEN RXEN -#define UART0_BIT_TXEN TXEN -#elif defined(__AVR_AT90PWM216__) || defined(__AVR_AT90PWM316__) -/* AT90PWN216/316 with one USART */ -#define UART0_RECEIVE_INTERRUPT USART_RX_vect -#define UART0_TRANSMIT_INTERRUPT USART_UDRE_vect -#define UART0_STATUS UCSRA -#define UART0_CONTROL UCSRB -#define UART0_CONTROLC UCSRC -#define UART0_DATA UDR -#define UART0_UDRIE UDRIE -#define UART0_UBRRL UBRRL -#define UART0_UBRRH UBRRH -#define UART0_BIT_U2X U2X -#define UART0_BIT_RXCIE RXCIE -#define UART0_BIT_RXEN RXEN -#define UART0_BIT_TXEN TXEN -#define UART0_BIT_UCSZ0 UCSZ0 -#define UART0_BIT_UCSZ1 UCSZ1 -#elif defined(__AVR_ATmega8__) || defined(__AVR_ATmega8A__) || defined(__AVR_ATmega16__) || \ - defined(__AVR_ATmega16A__) || defined(__AVR_ATmega32__) || defined(__AVR_ATmega32A__) || \ - defined(__AVR_ATmega323__) -/* ATmega with one USART */ -#define UART0_RECEIVE_INTERRUPT USART_RXC_vect -#define UART0_TRANSMIT_INTERRUPT USART_UDRE_vect -#define UART0_STATUS UCSRA -#define UART0_CONTROL UCSRB -#define UART0_CONTROLC UCSRC -#define UART0_DATA UDR -#define UART0_UDRIE UDRIE -#define UART0_UBRRL UBRRL -#define UART0_UBRRH UBRRH -#define UART0_BIT_U2X U2X -#define UART0_BIT_RXCIE RXCIE -#define UART0_BIT_RXEN RXEN -#define UART0_BIT_TXEN TXEN -#define UART0_BIT_UCSZ0 UCSZ0 -#define UART0_BIT_UCSZ1 UCSZ1 -#define UART0_BIT_URSEL URSEL -#elif defined(__AVR_ATmega8515__) || defined(__AVR_ATmega8535__) -#define UART0_RECEIVE_INTERRUPT USART_RX_vect -#define UART0_TRANSMIT_INTERRUPT USART_UDRE_vect -#define UART0_STATUS UCSRA -#define UART0_CONTROL UCSRB -#define UART0_CONTROLC UCSRC -#define UART0_DATA UDR -#define UART0_UDRIE UDRIE -#define UART0_UBRRL UBRRL -#define UART0_UBRRH UBRRH -#define UART0_BIT_U2X U2X -#define UART0_BIT_RXCIE RXCIE -#define UART0_BIT_RXEN RXEN -#define UART0_BIT_TXEN TXEN -#define UART0_BIT_UCSZ0 UCSZ0 -#define UART0_BIT_UCSZ1 UCSZ1 -#define UART0_BIT_URSEL URSEL -#elif defined(__AVR_ATmega163__) -/* ATmega163 with one UART */ -#define UART0_RECEIVE_INTERRUPT UART_RX_vect -#define UART0_TRANSMIT_INTERRUPT UART_UDRE_vect -#define UART0_STATUS UCSRA -#define UART0_CONTROL UCSRB -#define UART0_DATA UDR -#define UART0_UDRIE UDRIE -#define UART0_UBRRL UBRR -#define UART0_UBRRH UBRRHI -#define UART0_BIT_U2X U2X -#define UART0_BIT_RXCIE RXCIE -#define UART0_BIT_RXEN RXEN -#define UART0_BIT_TXEN TXEN -#elif defined(__AVR_ATmega162__) -/* ATmega with two USART */ -#define ATMEGA_USART1 -#define UART0_RECEIVE_INTERRUPT USART0_RXC_vect -#define UART1_RECEIVE_INTERRUPT USART1_RXC_vect -#define UART0_TRANSMIT_INTERRUPT USART0_UDRE_vect -#define UART1_TRANSMIT_INTERRUPT USART1_UDRE_vect -#define UART0_STATUS UCSR0A -#define UART0_CONTROL UCSR0B -#define UART0_CONTROLC UCSR0C -#define UART0_DATA UDR0 -#define UART0_UDRIE UDRIE0 -#define UART0_UBRRL UBRR0L -#define UART0_UBRRH UBRR0H -#define UART0_BIT_URSEL URSEL0 -#define UART0_BIT_U2X U2X0 -#define UART0_BIT_RXCIE RXCIE0 -#define UART0_BIT_RXEN RXEN0 -#define UART0_BIT_TXEN TXEN0 -#define UART0_BIT_UCSZ0 UCSZ00 -#define UART0_BIT_UCSZ1 UCSZ01 -#define UART1_STATUS UCSR1A -#define UART1_CONTROL UCSR1B -#define UART1_CONTROLC UCSR1C -#define UART1_DATA UDR1 -#define UART1_UDRIE UDRIE1 -#define UART1_UBRRL UBRR1L -#define UART1_UBRRH UBRR1H -#define UART1_BIT_URSEL URSEL1 -#define UART1_BIT_U2X U2X1 -#define UART1_BIT_RXCIE RXCIE1 -#define UART1_BIT_RXEN RXEN1 -#define UART1_BIT_TXEN TXEN1 -#define UART1_BIT_UCSZ0 UCSZ10 -#define UART1_BIT_UCSZ1 UCSZ11 -#elif defined(__AVR_ATmega161__) -/* ATmega with UART */ -#error "AVR ATmega161 currently not supported by this libaray !" -#elif defined(__AVR_ATmega169__) -/* ATmega with one USART */ -#define UART0_RECEIVE_INTERRUPT USART0_RX_vect -#define UART0_TRANSMIT_INTERRUPT USART0_UDRE_vect -#define UART0_STATUS UCSRA -#define UART0_CONTROL UCSRB -#define UART0_CONTROLC UCSRC -#define UART0_DATA UDR -#define UART0_UDRIE UDRIE -#define UART0_UBRRL UBRRL -#define UART0_UBRRH UBRRH -#define UART0_BIT_U2X U2X -#define UART0_BIT_RXCIE RXCIE -#define UART0_BIT_RXEN RXEN -#define UART0_BIT_TXEN TXEN -#define UART0_BIT_UCSZ0 UCSZ0 -#define UART0_BIT_UCSZ1 UCSZ1 -#elif defined(__AVR_ATmega48__) || defined(__AVR_ATmega48A__) || defined(__AVR_ATmega48P__) || \ - defined(__AVR_ATmega48PA__) || defined(__AVR_ATmega48PB__) || defined(__AVR_ATmega88__) || \ - defined(__AVR_ATmega88A__) || defined(__AVR_ATmega88P__) || defined(__AVR_ATmega88PA__) || \ - defined(__AVR_ATmega88PB__) || defined(__AVR_ATmega168__) || defined(__AVR_ATmega168A__) || \ - defined(__AVR_ATmega168P__) || defined(__AVR_ATmega168PA__) || defined(__AVR_ATmega168PB__) || \ - defined(__AVR_ATmega328__) || defined(__AVR_ATmega328P__) || defined(__AVR_ATmega3250__) || \ - defined(__AVR_ATmega3290__) || defined(__AVR_ATmega6450__) || defined(__AVR_ATmega6490__) -/* ATmega with one USART */ -#define UART0_RECEIVE_INTERRUPT USART_RX_vect -#define UART0_TRANSMIT_INTERRUPT USART_UDRE_vect -#define UART0_STATUS UCSR0A -#define UART0_CONTROL UCSR0B -#define UART0_CONTROLC UCSR0C -#define UART0_DATA UDR0 -#define UART0_UDRIE UDRIE0 -#define UART0_UBRRL UBRR0L -#define UART0_UBRRH UBRR0H -#define UART0_BIT_U2X U2X0 -#define UART0_BIT_RXCIE RXCIE0 -#define UART0_BIT_RXEN RXEN0 -#define UART0_BIT_TXEN TXEN0 -#define UART0_BIT_UCSZ0 UCSZ00 -#define UART0_BIT_UCSZ1 UCSZ01 -#elif defined(__AVR_ATtiny2313__) || defined(__AVR_ATtiny2313A__) || defined(__AVR_ATtiny4313__) -/* ATtiny with one USART */ -#define UART0_RECEIVE_INTERRUPT USART_RX_vect -#define UART0_TRANSMIT_INTERRUPT USART_UDRE_vect -#define UART0_STATUS UCSRA -#define UART0_CONTROL UCSRB -#define UART0_CONTROLC UCSRC -#define UART0_DATA UDR -#define UART0_UDRIE UDRIE -#define UART0_UBRRL UBRRL -#define UART0_UBRRH UBRRH -#define UART0_BIT_U2X U2X -#define UART0_BIT_RXCIE RXCIE -#define UART0_BIT_RXEN RXEN -#define UART0_BIT_TXEN TXEN -#define UART0_BIT_UCSZ0 UCSZ0 -#define UART0_BIT_UCSZ1 UCSZ1 -#elif defined(__AVR_ATmega329__) || defined(__AVR_ATmega649__) || defined(__AVR_ATmega3290__) || \ - defined(__AVR_ATmega6490__) || defined(__AVR_ATmega169A__) || defined(__AVR_ATmega169PA__) || \ - defined(__AVR_ATmega329A__) || defined(__AVR_ATmega329PA__) || defined(__AVR_ATmega3290A__) || \ - defined(__AVR_ATmega3290PA__) || defined(__AVR_ATmega649A__) || defined(__AVR_ATmega649P__) || \ - defined(__AVR_ATmega6490A__) || defined(__AVR_ATmega6490P__) || defined(__AVR_ATmega165__) || \ - defined(__AVR_ATmega325__) || defined(__AVR_ATmega645__) || defined(__AVR_ATmega3250__) || \ - defined(__AVR_ATmega6450__) || defined(__AVR_ATmega165A__) || defined(__AVR_ATmega165PA__) || \ - defined(__AVR_ATmega325A__) || defined(__AVR_ATmega325PA__) || defined(__AVR_ATmega3250A__) || \ - defined(__AVR_ATmega3250PA__) || defined(__AVR_ATmega645A__) || defined(__AVR_ATmega645PA__) || \ - defined(__AVR_ATmega6450A__) || defined(__AVR_ATmega6450PA__) || defined(__AVR_ATmega644__) -/* ATmega with one USART */ -#define UART0_RECEIVE_INTERRUPT USART0_RX_vect -#define UART0_TRANSMIT_INTERRUPT USART0_UDRE_vect -#define UART0_STATUS UCSR0A -#define UART0_CONTROL UCSR0B -#define UART0_CONTROLC UCSR0C -#define UART0_DATA UDR0 -#define UART0_UDRIE UDRIE0 -#define UART0_UBRRL UBRR0L -#define UART0_UBRRH UBRR0H -#define UART0_BIT_U2X U2X0 -#define UART0_BIT_RXCIE RXCIE0 -#define UART0_BIT_RXEN RXEN0 -#define UART0_BIT_TXEN TXEN0 -#define UART0_BIT_UCSZ0 UCSZ00 -#define UART0_BIT_UCSZ1 UCSZ01 -#elif defined(__AVR_ATmega64__) || defined(__AVR_ATmega128__) || defined(__AVR_ATmega128A__) || \ - defined(__AVR_ATmega640__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega1281__) || \ - defined(__AVR_ATmega2560__) || defined(__AVR_ATmega2561__) || defined(__AVR_ATmega164P__) || \ - defined(__AVR_ATmega324P__) || defined(__AVR_ATmega644P__) || defined(__AVR_ATmega164A__) || \ - defined(__AVR_ATmega164PA__) || defined(__AVR_ATmega324A__) || defined(__AVR_ATmega324PA__) || \ - defined(__AVR_ATmega644A__) || defined(__AVR_ATmega644PA__) || defined(__AVR_ATmega1284__) || \ - defined(__AVR_ATmega1284P__) || defined(__AVR_ATtiny1634__) -/* ATmega with two USART */ -#define ATMEGA_USART1 -#define UART0_RECEIVE_INTERRUPT USART0_RX_vect -#define UART1_RECEIVE_INTERRUPT USART1_RX_vect -#define UART0_TRANSMIT_INTERRUPT USART0_UDRE_vect -#define UART1_TRANSMIT_INTERRUPT USART1_UDRE_vect -#define UART0_STATUS UCSR0A -#define UART0_CONTROL UCSR0B -#define UART0_CONTROLC UCSR0C -#define UART0_DATA UDR0 -#define UART0_UDRIE UDRIE0 -#define UART0_UBRRL UBRR0L -#define UART0_UBRRH UBRR0H -#define UART0_BIT_U2X U2X0 -#define UART0_BIT_RXCIE RXCIE0 -#define UART0_BIT_RXEN RXEN0 -#define UART0_BIT_TXEN TXEN0 -#define UART0_BIT_UCSZ0 UCSZ00 -#define UART0_BIT_UCSZ1 UCSZ01 -#define UART1_STATUS UCSR1A -#define UART1_CONTROL UCSR1B -#define UART1_CONTROLC UCSR1C -#define UART1_DATA UDR1 -#define UART1_UDRIE UDRIE1 -#define UART1_UBRRL UBRR1L -#define UART1_UBRRH UBRR1H -#define UART1_BIT_U2X U2X1 -#define UART1_BIT_RXCIE RXCIE1 -#define UART1_BIT_RXEN RXEN1 -#define UART1_BIT_TXEN TXEN1 -#define UART1_BIT_UCSZ0 UCSZ10 -#define UART1_BIT_UCSZ1 UCSZ11 -#elif defined(__AVR_ATmega8U2__) || defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__) || \ - defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__) || defined(__AVR_AT90USB82__) || \ - defined(__AVR_AT90USB162__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB1286__) || \ - defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1287__) -#define UART0_RECEIVE_INTERRUPT USART1_RX_vect -#define UART0_TRANSMIT_INTERRUPT USART1_UDRE_vect -#define UART0_STATUS UCSR1A -#define UART0_CONTROL UCSR1B -#define UART0_CONTROLC UCSR1C -#define UART0_DATA UDR1 -#define UART0_UDRIE UDRIE1 -#define UART0_UBRRL UBRR1L -#define UART0_UBRRH UBRR1H -#define UART0_BIT_U2X U2X1 -#define UART0_BIT_RXCIE RXCIE1 -#define UART0_BIT_RXEN RXEN1 -#define UART0_BIT_TXEN TXEN1 -#define UART0_BIT_UCSZ0 UCSZ10 -#define UART0_BIT_UCSZ1 UCSZ11 -#else -#error "no UART definition for MCU available" -#endif - -/* - * module global variables - */ -static volatile unsigned char UART_TxBuf[UART_TX_BUFFER_SIZE]; -static volatile unsigned char UART_RxBuf[UART_RX_BUFFER_SIZE]; -static volatile unsigned char UART_TxHead; -static volatile unsigned char UART_TxTail; -static volatile unsigned char UART_RxHead; -static volatile unsigned char UART_RxTail; -static volatile unsigned char UART_LastRxError; - -#if defined(ATMEGA_USART1) -static volatile unsigned char UART1_TxBuf[UART_TX_BUFFER_SIZE]; -static volatile unsigned char UART1_RxBuf[UART_RX_BUFFER_SIZE]; -static volatile unsigned char UART1_TxHead; -static volatile unsigned char UART1_TxTail; -static volatile unsigned char UART1_RxHead; -static volatile unsigned char UART1_RxTail; -static volatile unsigned char UART1_LastRxError; -#endif - -ISR(UART0_RECEIVE_INTERRUPT) -/************************************************************************* -Function: UART Receive Complete interrupt -Purpose: called when the UART has received a character -**************************************************************************/ -{ - unsigned char tmphead; - unsigned char data; - unsigned char usr; - unsigned char lastRxError; - - /* read UART status register and UART data register */ - usr = UART0_STATUS; - data = UART0_DATA; - - /* get FEn (Frame Error) DORn (Data OverRun) UPEn (USART Parity Error) bits */ -#if defined(FE) && defined(DOR) && defined(UPE) - lastRxError = usr & (_BV(FE) | _BV(DOR) | _BV(UPE)); -#elif defined(FE0) && defined(DOR0) && defined(UPE0) - lastRxError = usr & (_BV(FE0) | _BV(DOR0) | _BV(UPE0)); -#elif defined(FE1) && defined(DOR1) && defined(UPE1) - lastRxError = usr & (_BV(FE1) | _BV(DOR1) | _BV(UPE1)); -#elif defined(FE) && defined(DOR) - lastRxError = usr & (_BV(FE) | _BV(DOR)); -#endif - - /* calculate buffer index */ - tmphead = (UART_RxHead + 1) & UART_RX_BUFFER_MASK; - - if (tmphead == UART_RxTail) { - /* error: receive buffer overflow */ - lastRxError = UART_BUFFER_OVERFLOW >> 8; - } else { - /* store new index */ - UART_RxHead = tmphead; - /* store received data in buffer */ - UART_RxBuf[tmphead] = data; - } - UART_LastRxError |= lastRxError; -} - -ISR(UART0_TRANSMIT_INTERRUPT) -/************************************************************************* -Function: UART Data Register Empty interrupt -Purpose: called when the UART is ready to transmit the next byte -**************************************************************************/ -{ - unsigned char tmptail; - - if (UART_TxHead != UART_TxTail) { - /* calculate and store new buffer index */ - tmptail = (UART_TxTail + 1) & UART_TX_BUFFER_MASK; - UART_TxTail = tmptail; - /* get one byte from buffer and write it to UART */ - UART0_DATA = UART_TxBuf[tmptail]; /* start transmission */ - } else { - /* tx buffer empty, disable UDRE interrupt */ - UART0_CONTROL &= ~_BV(UART0_UDRIE); - } -} - -/************************************************************************* -Function: uart_init() -Purpose: initialize UART and set baudrate -Input: baudrate using macro UART_BAUD_SELECT() -Returns: none -**************************************************************************/ -void uart_init(unsigned int baudrate) -{ - UART_TxHead = 0; - UART_TxTail = 0; - UART_RxHead = 0; - UART_RxTail = 0; - -#ifdef UART_TEST -#ifndef UART0_BIT_U2X -#warning "UART0_BIT_U2X not defined" -#endif -#ifndef UART0_UBRRH -#warning "UART0_UBRRH not defined" -#endif -#ifndef UART0_CONTROLC -#warning "UART0_CONTROLC not defined" -#endif -#if defined(URSEL) || defined(URSEL0) -#ifndef UART0_BIT_URSEL -#warning "UART0_BIT_URSEL not defined" -#endif -#endif -#endif - - /* Set baud rate */ - if (baudrate & 0x8000) { -#if UART0_BIT_U2X - UART0_STATUS = (1 << UART0_BIT_U2X); // Enable 2x speed -#endif - } -#if defined(UART0_UBRRH) - UART0_UBRRH = (unsigned char)((baudrate >> 8) & 0x80); -#endif - UART0_UBRRL = (unsigned char)(baudrate & 0x00FF); - - /* Enable USART receiver and transmitter and receive complete interrupt */ - UART0_CONTROL = _BV(UART0_BIT_RXCIE) | (1 << UART0_BIT_RXEN) | (1 << UART0_BIT_TXEN); - -/* Set frame format: asynchronous, 8data, no parity, 1stop bit */ -#ifdef UART0_CONTROLC -#ifdef UART0_BIT_URSEL - UART0_CONTROLC = (1 << UART0_BIT_URSEL) | (1 << UART0_BIT_UCSZ1) | (1 << UART0_BIT_UCSZ0); -#else - UART0_CONTROLC = (1 << UART0_BIT_UCSZ1) | (1 << UART0_BIT_UCSZ0); -#endif -#endif - -} /* uart_init */ - -/************************************************************************* -Function: uart_getc() -Purpose: return byte from ringbuffer -Returns: lower byte: received byte from ringbuffer - higher byte: last receive error -**************************************************************************/ -unsigned int uart_getc(void) -{ - unsigned char tmptail; - unsigned char data; - unsigned char lastRxError; - - if (UART_RxHead == UART_RxTail) { - return UART_NO_DATA; /* no data available */ - } - - /* calculate buffer index */ - tmptail = (UART_RxTail + 1) & UART_RX_BUFFER_MASK; - - /* get data from receive buffer */ - data = UART_RxBuf[tmptail]; - lastRxError = UART_LastRxError; - - /* store buffer index */ - UART_RxTail = tmptail; - - UART_LastRxError = 0; - return (lastRxError << 8) + data; - -} /* uart_getc */ - -/************************************************************************* -Function: uart_putc() -Purpose: write byte to ringbuffer for transmitting via UART -Input: byte to be transmitted -Returns: none -**************************************************************************/ -void uart_putc(unsigned char data) -{ - unsigned char tmphead; - - tmphead = (UART_TxHead + 1) & UART_TX_BUFFER_MASK; - - while (tmphead == UART_TxTail) { - ; /* wait for free space in buffer */ - } - - UART_TxBuf[tmphead] = data; - UART_TxHead = tmphead; - - /* enable UDRE interrupt */ - UART0_CONTROL |= _BV(UART0_UDRIE); - -} /* uart_putc */ - -/************************************************************************* -Function: uart_puts() -Purpose: transmit string to UART -Input: string to be transmitted -Returns: none -**************************************************************************/ -void uart_puts(const char *s) -{ - while (*s) - uart_putc(*s++); - -} /* uart_puts */ - -/************************************************************************* -Function: uart_puts_p() -Purpose: transmit string from program memory to UART -Input: program memory string to be transmitted -Returns: none -**************************************************************************/ -void uart_puts_p(const char *progmem_s) -{ - register char c; - - while ((c = pgm_read_byte(progmem_s++))) - uart_putc(c); - -} /* uart_puts_p */ - -/* - * these functions are only for ATmegas with two USART - */ -#if defined(ATMEGA_USART1) - -ISR(UART1_RECEIVE_INTERRUPT) -/************************************************************************* -Function: UART1 Receive Complete interrupt -Purpose: called when the UART1 has received a character -**************************************************************************/ -{ - unsigned char tmphead; - unsigned char data; - unsigned char usr; - unsigned char lastRxError; - - /* read UART status register and UART data register */ - usr = UART1_STATUS; - data = UART1_DATA; - - /* get FEn (Frame Error) DORn (Data OverRun) UPEn (USART Parity Error) bits */ - lastRxError = usr & (_BV(FE1) | _BV(DOR1) | _BV(UPE1)); - - /* calculate buffer index */ - tmphead = (UART1_RxHead + 1) & UART_RX_BUFFER_MASK; - - if (tmphead == UART1_RxTail) { - /* error: receive buffer overflow */ - lastRxError = UART_BUFFER_OVERFLOW >> 8; - } else { - /* store new index */ - UART1_RxHead = tmphead; - /* store received data in buffer */ - UART1_RxBuf[tmphead] = data; - } - UART1_LastRxError |= lastRxError; -} - -ISR(UART1_TRANSMIT_INTERRUPT) -/************************************************************************* -Function: UART1 Data Register Empty interrupt -Purpose: called when the UART1 is ready to transmit the next byte -**************************************************************************/ -{ - unsigned char tmptail; - - if (UART1_TxHead != UART1_TxTail) { - /* calculate and store new buffer index */ - tmptail = (UART1_TxTail + 1) & UART_TX_BUFFER_MASK; - UART1_TxTail = tmptail; - /* get one byte from buffer and write it to UART */ - UART1_DATA = UART1_TxBuf[tmptail]; /* start transmission */ - } else { - /* tx buffer empty, disable UDRE interrupt */ - UART1_CONTROL &= ~_BV(UART1_UDRIE); - } -} - -/************************************************************************* -Function: uart1_init() -Purpose: initialize UART1 and set baudrate -Input: baudrate using macro UART_BAUD_SELECT() -Returns: none -**************************************************************************/ -void uart1_init(unsigned int baudrate) -{ - UART1_TxHead = 0; - UART1_TxTail = 0; - UART1_RxHead = 0; - UART1_RxTail = 0; - -#ifdef UART_TEST -#ifndef UART1_BIT_U2X -#warning "UART1_BIT_U2X not defined" -#endif -#ifndef UART1_UBRRH -#warning "UART1_UBRRH not defined" -#endif -#ifndef UART1_CONTROLC -#warning "UART1_CONTROLC not defined" -#endif -#if defined(URSEL) || defined(URSEL1) -#ifndef UART1_BIT_URSEL -#warning "UART1_BIT_URSEL not defined" -#endif -#endif -#endif - - /* Set baud rate */ - if (baudrate & 0x8000) { -#if UART1_BIT_U2X - UART1_STATUS = (1 << UART1_BIT_U2X); // Enable 2x speed -#endif - } - UART1_UBRRH = (unsigned char)((baudrate >> 8) & 0x80); - UART1_UBRRL = (unsigned char)baudrate; - - /* Enable USART receiver and transmitter and receive complete interrupt */ - UART1_CONTROL = _BV(UART1_BIT_RXCIE) | (1 << UART1_BIT_RXEN) | (1 << UART1_BIT_TXEN); - -/* Set frame format: asynchronous, 8data, no parity, 1stop bit */ -#ifdef UART1_BIT_URSEL - UART1_CONTROLC = (1 << UART1_BIT_URSEL) | (1 << UART1_BIT_UCSZ1) | (1 << UART1_BIT_UCSZ0); -#else - UART1_CONTROLC = (1 << UART1_BIT_UCSZ1) | (1 << UART1_BIT_UCSZ0); -#endif - -} /* uart_init */ - -/************************************************************************* -Function: uart1_getc() -Purpose: return byte from ringbuffer -Returns: lower byte: received byte from ringbuffer - higher byte: last receive error -**************************************************************************/ -unsigned int uart1_getc(void) -{ - unsigned char tmptail; - unsigned int data; - unsigned char lastRxError; - - if (UART1_RxHead == UART1_RxTail) { - return UART_NO_DATA; /* no data available */ - } - - /* calculate buffer index */ - tmptail = (UART1_RxTail + 1) & UART_RX_BUFFER_MASK; - - /* get data from receive buffer */ - data = UART1_RxBuf[tmptail]; - lastRxError = UART1_LastRxError; - - /* store buffer index */ - UART1_RxTail = tmptail; - - UART1_LastRxError = 0; - return (lastRxError << 8) + data; - -} /* uart1_getc */ - -/************************************************************************* -Function: uart1_putc() -Purpose: write byte to ringbuffer for transmitting via UART -Input: byte to be transmitted -Returns: none -**************************************************************************/ -void uart1_putc(unsigned char data) -{ - unsigned char tmphead; - - tmphead = (UART1_TxHead + 1) & UART_TX_BUFFER_MASK; - - while (tmphead == UART1_TxTail) { - ; /* wait for free space in buffer */ - } - - UART1_TxBuf[tmphead] = data; - UART1_TxHead = tmphead; - - /* enable UDRE interrupt */ - UART1_CONTROL |= _BV(UART1_UDRIE); - -} /* uart1_putc */ - -/************************************************************************* -Function: uart1_puts() -Purpose: transmit string to UART1 -Input: string to be transmitted -Returns: none -**************************************************************************/ -void uart1_puts(const char *s) -{ - while (*s) - uart1_putc(*s++); - -} /* uart1_puts */ - -/************************************************************************* -Function: uart1_puts_p() -Purpose: transmit string from program memory to UART1 -Input: program memory string to be transmitted -Returns: none -**************************************************************************/ -void uart1_puts_p(const char *progmem_s) -{ - register char c; - - while ((c = pgm_read_byte(progmem_s++))) - uart1_putc(c); - -} /* uart1_puts_p */ - -#endif diff --git a/uart.h b/uart.h deleted file mode 100644 index 208bf52..0000000 --- a/uart.h +++ /dev/null @@ -1,196 +0,0 @@ -#ifndef UART_H -#define UART_H -/************************************************************************ -Title: Interrupt UART library with receive/transmit circular buffers -Author: Peter Fleury http://tinyurl.com/peterfleury -File: $Id: uart.h,v 1.13 2015/01/11 13:53:25 peter Exp $ -Software: AVR-GCC 4.x, AVR Libc 1.4 or higher -Hardware: any AVR with built-in UART/USART -Usage: see Doxygen manual - -LICENSE: - Copyright (C) 2015 Peter Fleury, GNU General Public License Version 3 - - 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 3 of the License, or - 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. - -************************************************************************/ - -/** - * @file - * @defgroup pfleury_uart UART Library - * @code #include @endcode - * - * @brief Interrupt UART library using the built-in UART with transmit and receive circular buffers. - * - * This library can be used to transmit and receive data through the built in UART. - * - * An interrupt is generated when the UART has finished transmitting or - * receiving a byte. The interrupt handling routines use circular buffers - * for buffering received and transmitted data. - * - * The UART_RX_BUFFER_SIZE and UART_TX_BUFFER_SIZE constants define - * the size of the circular buffers in bytes. Note that these constants must be a power of 2. - * You may need to adapt these constants to your target and your application by adding - * CDEFS += -DUART_RX_BUFFER_SIZE=nn -DUART_TX_BUFFER_SIZE=nn to your Makefile. - * - * @note Based on Atmel Application Note AVR306 - * @author Peter Fleury pfleury@gmx.ch http://tinyurl.com/peterfleury - * @copyright (C) 2015 Peter Fleury, GNU General Public License Version 3 - */ - -#include - -#if (__GNUC__ * 100 + __GNUC_MINOR__) < 405 -#error "This library requires AVR-GCC 4.5 or later, update to newer AVR-GCC compiler !" -#endif - -/**@{*/ - -/* -** constants and macros -*/ - -/** @brief UART Baudrate Expression - * @param xtalCpu system clock in Mhz, e.g. 4000000UL for 4Mhz - * @param baudRate baudrate in bps, e.g. 1200, 2400, 9600 - */ -#define UART_BAUD_SELECT(baudRate, xtalCpu) (((xtalCpu) + 8UL * (baudRate)) / (16UL * (baudRate)) - 1UL) - -/** @brief UART Baudrate Expression for ATmega double speed mode - * @param xtalCpu system clock in Mhz, e.g. 4000000UL for 4Mhz - * @param baudRate baudrate in bps, e.g. 1200, 2400, 9600 - */ -#define UART_BAUD_SELECT_DOUBLE_SPEED(baudRate, xtalCpu) \ - (((((xtalCpu) + 4UL * (baudRate)) / (8UL * (baudRate)) - 1UL)) | 0x8000) - -/** @brief Size of the circular receive buffer, must be power of 2 - * - * You may need to adapt this constant to your target and your application by adding - * CDEFS += -DUART_RX_BUFFER_SIZE=nn to your Makefile. - */ -#ifndef UART_RX_BUFFER_SIZE -#define UART_RX_BUFFER_SIZE 32 -#endif - -/** @brief Size of the circular transmit buffer, must be power of 2 - * - * You may need to adapt this constant to your target and your application by adding - * CDEFS += -DUART_TX_BUFFER_SIZE=nn to your Makefile. - */ -#ifndef UART_TX_BUFFER_SIZE -#define UART_TX_BUFFER_SIZE 32 -#endif - -/* test if the size of the circular buffers fits into SRAM */ -#if ((UART_RX_BUFFER_SIZE + UART_TX_BUFFER_SIZE) >= (RAMEND - 0x60)) -#error "size of UART_RX_BUFFER_SIZE + UART_TX_BUFFER_SIZE larger than size of SRAM" -#endif - -/* -** high byte error return code of uart_getc() -*/ -#define UART_FRAME_ERROR 0x1000 /**< @brief Framing Error by UART */ -#define UART_OVERRUN_ERROR 0x0800 /**< @brief Overrun condition by UART */ -#define UART_PARITY_ERROR 0x0400 /**< @brief Parity Error by UART */ -#define UART_BUFFER_OVERFLOW 0x0200 /**< @brief receive ringbuffer overflow */ -#define UART_NO_DATA 0x0100 /**< @brief no receive data available */ - -/* -** function prototypes -*/ - -/** - @brief Initialize UART and set baudrate - @param baudrate Specify baudrate using macro UART_BAUD_SELECT() - @return none -*/ -extern void uart_init(unsigned int baudrate); - -/** - * @brief Get received byte from ringbuffer - * - * Returns in the lower byte the received character and in the - * higher byte the last receive error. - * UART_NO_DATA is returned when no data is available. - * - * @return lower byte: received byte from ringbuffer - * @return higher byte: last receive status - * - \b 0 successfully received data from UART - * - \b UART_NO_DATA - *
no receive data available - * - \b UART_BUFFER_OVERFLOW - *
Receive ringbuffer overflow. - * We are not reading the receive buffer fast enough, - * one or more received character have been dropped - * - \b UART_OVERRUN_ERROR - *
Overrun condition by UART. - * A character already present in the UART UDR register was - * not read by the interrupt handler before the next character arrived, - * one or more received characters have been dropped. - * - \b UART_FRAME_ERROR - *
Framing Error by UART - */ -extern unsigned int uart_getc(void); - -/** - * @brief Put byte to ringbuffer for transmitting via UART - * @param data byte to be transmitted - * @return none - */ -extern void uart_putc(unsigned char data); - -/** - * @brief Put string to ringbuffer for transmitting via UART - * - * The string is buffered by the uart library in a circular buffer - * and one character at a time is transmitted to the UART using interrupts. - * Blocks if it can not write the whole string into the circular buffer. - * - * @param s string to be transmitted - * @return none - */ -extern void uart_puts(const char *s); - -/** - * @brief Put string from program memory to ringbuffer for transmitting via UART. - * - * The string is buffered by the uart library in a circular buffer - * and one character at a time is transmitted to the UART using interrupts. - * Blocks if it can not write the whole string into the circular buffer. - * - * @param s program memory string to be transmitted - * @return none - * @see uart_puts_P - */ -extern void uart_puts_p(const char *s); - -/** - * @brief Macro to automatically put a string constant into program memory - */ -#define uart_puts_P(__s) uart_puts_p(PSTR(__s)) - -/** @brief Initialize USART1 (only available on selected ATmegas) @see uart_init */ -extern void uart1_init(unsigned int baudrate); -/** @brief Get received byte of USART1 from ringbuffer. (only available on selected ATmega) @see uart_getc */ -extern unsigned int uart1_getc(void); -/** @brief Put byte to ringbuffer for transmitting via USART1 (only available on selected ATmega) @see uart_putc */ -extern void uart1_putc(unsigned char data); -/** @brief Put string to ringbuffer for transmitting via USART1 (only available on selected ATmega) @see uart_puts */ -extern void uart1_puts(const char *s); -/** @brief Put string from program memory to ringbuffer for transmitting via USART1 (only available on selected ATmega) - * @see uart_puts_p */ -extern void uart1_puts_p(const char *s); -/** @brief Macro to automatically put a string constant into program memory */ -#define uart1_puts_P(__s) uart1_puts_p(PSTR(__s)) - -/**@}*/ - -#endif // UART_H