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Added 01_m1284p_bb00_minimum project

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maxxir_w
2019-01-18 11:23:07 +04:00
parent a187cce1df
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01_m1284p_bb00_minimum/main.c Normal file
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/*
* main.c
*
* Created on: 22 нояб. 2018 г.
* Author: maxx
*/
#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
#include <compat/deprecated.h> //sbi, cbi etc..
#include "avr/wdt.h" // WatchDog
#include <stdio.h> // printf etc..
#include "uart_extd.h"
//#include <stdlib.h> // itoa etc..
#define PRINTF_EN 1
#if PRINTF_EN
#define PRINTF(FORMAT,args...) printf_P(PSTR(FORMAT),##args)
#else
#define PRINTF(...)
#endif
/*
* m1284p minimum template, with one button & one led
*/
//M644P/M1284p Users LEDS:
//LED1/PORTC.4- m644p/m1284p maxxir
#define led1_conf() DDRC |= (1<<DDC4)
#define led1_high() PORTC |= (1<<PORTC4)
#define led1_low() PORTC &= ~(1<<PORTC4)
#define led1_tgl() PORTC ^= (1<<PORTC4)
#define led1_read() (PORTC & (1<<PORTC4))
#define sw1_conf() {DDRC &= ~(1<<DDC5); PORTC |= (1<<PORTC5);}
#define sw1_read() (PINC & (1<<PINC5))
//*********Global vars
#define TICK_PER_SEC 1000UL
volatile unsigned long _millis; // for millis tick !! Overflow every ~49.7 days
//*********Program metrics
const char compile_date[] PROGMEM = __DATE__; // Mmm dd yyyy - Дата компиляции
const char compile_time[] PROGMEM = __TIME__; // hh:mm:ss - Время компиляции
const char str_prog_name[] PROGMEM = "\r\nAtMega1284p v1.2 Base Template 22/11/2018\r\n"; // Program name
#if defined(__AVR_ATmega128__)
const char PROGMEM str_mcu[] = "ATmega128"; //CPU is m128
#elif defined (__AVR_ATmega2560__)
const char PROGMEM str_mcu[] = "ATmega2560"; //CPU is m2560
#elif defined (__AVR_ATmega2561__)
const char PROGMEM str_mcu[] = "ATmega2561"; //CPU is m2561
#elif defined (__AVR_ATmega328P__)
const char PROGMEM str_mcu[] = "ATmega328P"; //CPU is m328p
#elif defined (__AVR_ATmega32U4__)
const char PROGMEM str_mcu[] = "ATmega32u4"; //CPU is m32u4
#elif defined (__AVR_ATmega644P__)
const char PROGMEM str_mcu[] = "ATmega644p"; //CPU is m644p
#elif defined (__AVR_ATmega1284P__)
const char PROGMEM str_mcu[] = "ATmega1284p"; //CPU is m1284p
#else
const char PROGMEM str_mcu[] = "Unknown CPU"; //CPU is unknown
#endif
//FUNC headers
static void avr_init(void);
void timer0_init(void);
static inline unsigned long millis(void);
// RAM Memory usage test
static int freeRam (void)
{
extern int __heap_start, *__brkval;
int v;
int _res = (int) &v - (__brkval == 0 ? (int) &__heap_start : (int) __brkval);
return _res;
}
//******************* MILLIS ENGINE: BEGIN
//ISR (TIMER0_COMP_vect )
ISR (TIMER0_COMPA_vect)
{
// Compare match Timer0
// Here every 1ms
_millis++; // INC millis tick
// Тест мигаем при в ходе в прерывание
// 500Hz FREQ OUT
// LED_TGL;
}
static inline unsigned long millis(void)
{
unsigned long i;
cli();
// Atomic tick reading
i = _millis;
sei();
return i;
}
//******************* MILLIS ENGINE: END
//***************** UART0: BEGIN
// Assign I/O stream to UART
/* define CPU frequency in Mhz here if not defined in Makefile */
//#ifndef F_CPU
//#define F_CPU 16000000UL
//#endif
/* 19200 baud */
#define UART_BAUD_RATE 19200
//#define UART_BAUD_RATE 38400
static int uart0_putchar(char ch,FILE *stream);
static void uart0_rx_flash(void);
static FILE uart0_stdout = FDEV_SETUP_STREAM(uart0_putchar, NULL, _FDEV_SETUP_WRITE);
//PS. stdin не переназначаю, т.к. удобнее с ним работать через uart.h - api:
/*
* Т.е. например так
c = uart1_getc();
if (( c & UART_NO_DATA ) == 0)
{
uart1_putc( (unsigned char)c );
}
При этом чекаем что буфер приема не пуст и опрос идет неблокирующий (+ работаем через UART RX RINGBUFFER),
а если работаем в стиле stdin->getchar() там опрос блокируется пока символ не будет принят (поллинг)
через UART1_RX, т.е. неудобно.
*/
// STDOUT UART0 TX handler
static int uart0_putchar(char ch,FILE *stream)
{
uart_putc(ch);
return 0;
}
// Очищаем буфер приема UART1 RX (иногда нужно)
static void uart0_rx_flash(void)
{
// Считываем все из ring-buffer UART1 RX
unsigned int c;
do
{
c = uart_getc();
} while (( c & UART_NO_DATA ) == 0); // Check RX1 none-empty
}
//***************** UART0: END
//***************** ADC: BEGIN
#ifndef ADC_DIV
//12.5MHz or over use this ADC reference clock
#define ADC_DIV (1<<ADPS2)|(1<<ADPS1)|(1<<ADPS0) //:128 ADC Prescaler
#endif
#ifndef ADC_REF
// vcc voltage ref default
#define ADC_REF (1<<REFS0)
#endif
void adc_init(void)
{
ADCSRA = 0;
ADCSRA |= (ADC_DIV); // ADC reference clock
ADMUX |= (ADC_REF); // Voltage reference
ADCSRA |= (1<<ADEN); // Turn on ADC
ADCSRA |= (1<<ADSC); // Do an initial conversion because this one is the
// slowest and to ensure that everything is up
// and running
}
uint16_t adc_read(uint8_t channel)
{
ADMUX &= 0b11100000; //Clear the older channel that was read
ADMUX |= channel; //Defines the new ADC channel to be read
ADCSRA |= (1<<ADSC); //Starts a new conversion
while(ADCSRA & (1<<ADSC)); //Wait until the conversion is done
return ADCW; //Returns the ADC value of the chosen channel
}
//***************** ADC: END
int main()
{
uint8_t prev_sw1 = 1; // VAR for sw1 pressing detect
// INIT MCU
avr_init();
// Print program metrics
PRINTF("%S", str_prog_name);// Название программы
PRINTF("Compiled at: %S %S\r\n", compile_time, compile_date);// Время Дата компиляции
PRINTF(">> MCU is: %S; CLK is: %luHz\r\n", str_mcu, F_CPU);// MCU Name && FREQ
PRINTF(">> Free RAM is: %d bytes\r\n", freeRam());
//Short Blink LED 3 times on startup
unsigned char i = 3;
while(i--)
{
led1_high();
_delay_ms(100);
led1_low();
_delay_ms(400);
wdt_reset();
}
unsigned long prev_millis = 0;
unsigned long rx_millis = 0;
unsigned long uptime = 0;
uint16_t CharIn;
while(1)
{
//Here at least every 1sec
wdt_reset(); // WDT reset at least every sec
if((millis()-prev_millis)>TICK_PER_SEC)
{
//Here every 1sec
wdt_reset(); // WDT reset at least every sec
prev_millis = millis();
led1_tgl();
PRINTF("Uptime %lu sec\r\n", uptime++);
//PRINTF("ADC5: %d\r\n", adc_read(5));
//!! SW1 pressing action
if(!sw1_read())// Check for SW1 pressed every second
{
// SW1 is pressed
//led1_high(); //LED1 ON
if(prev_sw1)
{
//!! Здесь по факту нажатия кнопки (1->0 SW1)
//!! Debug only
PRINTF("SW1 is pressed\r\nADC0/PA0 is: %u\r\n", adc_read(0));
//PRINTF("SW1 is pressed\r\n");
}//if(prev_sw1)
prev_sw1 = 0; // Store SW1 state for next iteration
}//if(!sw1_read())
else
{
// SW1 is unpressed
//led1_low(); // LED1 OFF
prev_sw1 = 1;// Store SW1 state for next iteration
}//if(!sw1_read())else..
}//if((millis()-prev_millis)>TICK_PER_SEC)
if((millis()-rx_millis)>0)
{
// Here every 1 msec, to check UART RX
rx_millis = millis();
// GET UART RX Symbol
CharIn = uart_getc();
// Check if char exist
// Read until data in RX buffer present
while (( CharIn & UART_NO_DATA ) == 0)
{
wdt_reset(); // WDT reset at least every sec
//!! Debug only
//Read data from UART0 RX ring buffer & send back echo
uart_putc(CharIn+1);
// GET UART RX Symbol
CharIn = uart_getc();
}
}//if((millis()-rx_millis)>0)
}
return 0;
}
// Timer0
// 1ms IRQ
// Used for millis() timing
void timer0_init(void)
{
/*
*
* For M128
TCCR0 = (1<<CS02)|(1<<WGM01); //TIMER0 SET-UP: CTC MODE & PS 1:64
OCR0 = 249; // 1ms reach for clear (16mz:64=>250kHz:250-=>1kHz)
TIMSK |= 1<<OCIE0; //IRQ on TIMER0 output compare
*/
//For M664p
TCCR0A = (1<<WGM01); //TIMER0 SET-UP: CTC MODE
TCCR0B = (1<<CS01)|(1<<CS00); // PS 1:64
OCR0A = 249; // 1ms reach for clear (16mz:64=>250kHz:250-=>1kHz)
TIMSK0 |= 1<<OCIE0A; //IRQ on TIMER0 output compareA
}
static void avr_init(void)
{
// Initialize device here.
// WatchDog INIT
wdt_enable(WDTO_2S); // set up wdt reset interval 2 second
wdt_reset(); // wdt reset ~ every <2000ms
timer0_init();// Timer0 millis engine init
// Initial UART Peripheral
/*
* Initialize uart11 library, pass baudrate and AVR cpu clock
* with the macro
* uart1_BAUD_SELECT() (normal speed mode )
* or
* uart1_BAUD_SELECT_DOUBLE_SPEED() ( double speed mode)
*/
// Define Output/Input Stream
#if (UART_BAUD_RATE == 115200)
uart_init( UART_BAUD_SELECT_DOUBLE_SPEED(UART_BAUD_RATE,F_CPU) ); // To works without error on 115200 bps/F_CPU=16Mhz
#else
uart_init( UART_BAUD_SELECT(UART_BAUD_RATE,F_CPU) );
#endif
stdout = &uart0_stdout;
//ADC init
adc_init();
adc_read(0); //Dummy read
led1_conf();
led1_low();// LED1 is OFF
sw1_conf();//SW1 internal pull-up
sei(); //re-enable global interrupts
return;
}

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/*
* Modified for different BUFFER_SIZE for UART0 && UART1
* see below: UART0_RX_BUFFER_SIZE/UART1_RX_BUFFER_SIZE && UART0_TX_BUFFER_SIZE/UART1_TX_BUFFER_SIZE
* Ibragimov M. 7/03/2015
*/
/*************************************************************************
Title: Interrupt UART library with receive/transmit circular buffers
Author: Peter Fleury <pfleury@gmx.ch> http://jump.to/fleury
File: $Id: uart.c,v 1.12 2014/01/08 21:58:12 peter Exp $
Software: AVR-GCC 4.1, AVR Libc 1.4.6 or higher
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 UART0[1]_RX_BUFFER_SIZE and UART0[1]_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) 2006 Peter Fleury
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 <avr/io.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
#include "uart_extd.h"
/*
* constants and macros
*/
/* size of RX0/TX0 buffers */
#define UART0_RX_BUFFER_MASK ( UART0_RX_BUFFER_SIZE - 1)
#define UART0_TX_BUFFER_MASK ( UART0_TX_BUFFER_SIZE - 1)
#if ( UART0_RX_BUFFER_SIZE & UART0_RX_BUFFER_MASK )
#error RX0 buffer size is not a power of 2
#endif
#if ( UART0_TX_BUFFER_SIZE & UART0_TX_BUFFER_MASK )
#error TX0 buffer size is not a power of 2
#endif
/* size of RX1/TX1 buffers */
#define UART1_RX_BUFFER_MASK ( UART1_RX_BUFFER_SIZE - 1)
#define UART1_TX_BUFFER_MASK ( UART1_TX_BUFFER_SIZE - 1)
#if ( UART1_RX_BUFFER_SIZE & UART1_RX_BUFFER_MASK )
#error RX1 buffer size is not a power of 2
#endif
#if ( UART1_TX_BUFFER_SIZE & UART1_TX_BUFFER_MASK )
#error TX1 buffer size is not a power of 2
#endif
#if defined(__AVR_AT90S2313__) \
|| defined(__AVR_AT90S4414__) || defined(__AVR_AT90S4434__) \
|| defined(__AVR_AT90S8515__) || defined(__AVR_AT90S8535__) \
|| defined(__AVR_ATmega103__)
/* old AVR classic or ATmega103 with one UART */
#define AT90_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
#elif defined(__AVR_AT90S2333__) || defined(__AVR_AT90S4433__)
/* old AVR classic with one UART */
#define AT90_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
#elif defined(__AVR_ATmega8__) || defined(__AVR_ATmega16__) || defined(__AVR_ATmega32__) \
|| defined(__AVR_ATmega323__)
/* ATmega with one USART */
#define ATMEGA_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_DATA UDR
#define UART0_UDRIE UDRIE
#elif defined (__AVR_ATmega8515__) || defined(__AVR_ATmega8535__)
#define ATMEGA_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_DATA UDR
#define UART0_UDRIE UDRIE
#elif defined(__AVR_ATmega163__)
/* ATmega163 with one UART */
#define ATMEGA_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
#elif defined(__AVR_ATmega162__)
/* ATmega with two USART */
#define ATMEGA_USART0
#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_DATA UDR0
#define UART0_UDRIE UDRIE0
#define UART1_STATUS UCSR1A
#define UART1_CONTROL UCSR1B
#define UART1_DATA UDR1
#define UART1_UDRIE UDRIE1
#elif defined(__AVR_ATmega64__) || defined(__AVR_ATmega128__)
/* ATmega with two USART */
#define ATMEGA_USART0
#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_DATA UDR0
#define UART0_UDRIE UDRIE0
#define UART1_STATUS UCSR1A
#define UART1_CONTROL UCSR1B
#define UART1_DATA UDR1
#define UART1_UDRIE UDRIE1
#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 ATMEGA_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_DATA UDR
#define UART0_UDRIE UDRIE
#elif defined(__AVR_ATmega48__) || defined(__AVR_ATmega88__) || defined(__AVR_ATmega168__) || defined(__AVR_ATmega48P__) || defined(__AVR_ATmega88P__) || defined(__AVR_ATmega168P__) || defined(__AVR_ATmega328P__) \
|| defined(__AVR_ATmega3250__) || defined(__AVR_ATmega3290__) ||defined(__AVR_ATmega6450__) || defined(__AVR_ATmega6490__)
/* ATmega with one USART */
#define ATMEGA_USART0
#define UART0_RECEIVE_INTERRUPT USART_RX_vect
#define UART0_TRANSMIT_INTERRUPT USART_UDRE_vect
#define UART0_STATUS UCSR0A
#define UART0_CONTROL UCSR0B
#define UART0_DATA UDR0
#define UART0_UDRIE UDRIE0
#elif defined(__AVR_ATtiny2313__)
#define ATMEGA_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_DATA UDR
#define UART0_UDRIE UDRIE
#elif defined(__AVR_ATmega329__) || \
defined(__AVR_ATmega649__) || \
defined(__AVR_ATmega325__) || \
defined(__AVR_ATmega645__)
/* ATmega with one USART */
#define ATMEGA_USART0
#define UART0_RECEIVE_INTERRUPT USART0_RX_vect
#define UART0_TRANSMIT_INTERRUPT USART0_UDRE_vect
#define UART0_STATUS UCSR0A
#define UART0_CONTROL UCSR0B
#define UART0_DATA UDR0
#define UART0_UDRIE UDRIE0
#elif defined(__AVR_ATmega2560__) || defined(__AVR_ATmega2561__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega1281__) || defined(__AVR_ATmega640__)
/* ATmega with two USART */
#define ATMEGA_USART0
#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_DATA UDR0
#define UART0_UDRIE UDRIE0
#define UART1_STATUS UCSR1A
#define UART1_CONTROL UCSR1B
#define UART1_DATA UDR1
#define UART1_UDRIE UDRIE1
#elif defined(__AVR_ATmega644__)
/* ATmega with one USART */
#define ATMEGA_USART0
#define UART0_RECEIVE_INTERRUPT USART0_RX_vect
#define UART0_TRANSMIT_INTERRUPT USART0_UDRE_vect
#define UART0_STATUS UCSR0A
#define UART0_CONTROL UCSR0B
#define UART0_DATA UDR0
#define UART0_UDRIE UDRIE0
#elif defined(__AVR_ATmega164P__) || defined(__AVR_ATmega324P__) || defined(__AVR_ATmega644P__) || defined(__AVR_ATmega1284P__)
/* ATmega with two USART */
#define ATMEGA_USART0
#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_DATA UDR0
#define UART0_UDRIE UDRIE0
#define UART1_STATUS UCSR1A
#define UART1_CONTROL UCSR1B
#define UART1_DATA UDR1
#define UART1_UDRIE UDRIE1
#elif defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1287__)
/* AT90USBxx with one USART */
#define AT90USB_USART
#define UART0_RECEIVE_INTERRUPT USART1_RX_vect
#define UART0_TRANSMIT_INTERRUPT USART1_UDRE_vect
#define UART0_STATUS UCSR1A
#define UART0_CONTROL UCSR1B
#define UART0_DATA UDR1
#define UART0_UDRIE UDRIE1
#else
#error "no UART definition for MCU available"
#endif
/*
* module global variables
*/
static volatile unsigned char UART_TxBuf[UART0_TX_BUFFER_SIZE];
static volatile unsigned char UART_RxBuf[UART0_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[UART1_TX_BUFFER_SIZE];
static volatile unsigned char UART1_RxBuf[UART1_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;
/* */
#if defined( AT90_UART )
lastRxError = (usr & (_BV(FE)|_BV(DOR)) );
#elif defined( ATMEGA_USART )
lastRxError = (usr & (_BV(FE)|_BV(DOR)) );
#elif defined( ATMEGA_USART0 )
lastRxError = (usr & (_BV(FE0)|_BV(DOR0)) );
#elif defined ( ATMEGA_UART )
lastRxError = (usr & (_BV(FE)|_BV(DOR)) );
#elif defined( AT90USB_USART )
lastRxError = (usr & (_BV(FE1)|_BV(DOR1)) );
#endif
/* calculate buffer index */
tmphead = ( UART_RxHead + 1) & UART0_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) & UART0_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;
#if defined( AT90_UART )
/* set baud rate */
UBRR = (unsigned char)baudrate;
/* enable UART receiver and transmmitter and receive complete interrupt */
UART0_CONTROL = _BV(RXCIE)|_BV(RXEN)|_BV(TXEN);
#elif defined (ATMEGA_USART)
/* Set baud rate */
if ( baudrate & 0x8000 )
{
UART0_STATUS = (1<<U2X); //Enable 2x speed
baudrate &= ~0x8000;
}
UBRRH = (unsigned char)(baudrate>>8);
UBRRL = (unsigned char) baudrate;
/* Enable USART receiver and transmitter and receive complete interrupt */
UART0_CONTROL = _BV(RXCIE)|(1<<RXEN)|(1<<TXEN);
/* Set frame format: asynchronous, 8data, no parity, 1stop bit */
#ifdef URSEL
UCSRC = (1<<URSEL)|(3<<UCSZ0);
#else
UCSRC = (3<<UCSZ0);
#endif
#elif defined (ATMEGA_USART0 )
/* Set baud rate */
if ( baudrate & 0x8000 )
{
UART0_STATUS = (1<<U2X0); //Enable 2x speed
baudrate &= ~0x8000;
}
UBRR0H = (unsigned char)(baudrate>>8);
UBRR0L = (unsigned char) baudrate;
/* Enable USART receiver and transmitter and receive complete interrupt */
UART0_CONTROL = _BV(RXCIE0)|(1<<RXEN0)|(1<<TXEN0);
/* Set frame format: asynchronous, 8data, no parity, 1stop bit */
#ifdef URSEL0
UCSR0C = (1<<URSEL0)|(3<<UCSZ00);
#else
UCSR0C = (3<<UCSZ00);
#endif
#elif defined ( ATMEGA_UART )
/* set baud rate */
if ( baudrate & 0x8000 )
{
UART0_STATUS = (1<<U2X); //Enable 2x speed
baudrate &= ~0x8000;
}
UBRRHI = (unsigned char)(baudrate>>8);
UBRR = (unsigned char) baudrate;
/* Enable UART receiver and transmitter and receive complete interrupt */
UART0_CONTROL = _BV(RXCIE)|(1<<RXEN)|(1<<TXEN);
#elif defined ( AT90USB_USART )
/* set baud rate */
if ( baudrate & 0x8000 )
{
UART0_STATUS = (1<<U2X1 ); //Enable 2x speed
baudrate &= ~0x8000;
}
UBRR1H = (unsigned char)(baudrate>>8);
UBRR1L = (unsigned char) baudrate;
/* Enable UART receiver and transmitter and receive complete interrupt */
UART0_CONTROL = _BV(RXCIE1)|(1<<RXEN1)|(1<<TXEN1);
/* Set frame format: asynchronous, 8data, no parity, 1stop bit */
UCSR1C = (1<<UCSZ11)|(1<<UCSZ10);
#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;
if ( UART_RxHead == UART_RxTail ) {
return UART_NO_DATA; /* no data available */
}
/* calculate /store buffer index */
tmptail = (UART_RxTail + 1) & UART0_RX_BUFFER_MASK;
UART_RxTail = tmptail;
/* get data from receive buffer */
data = UART_RxBuf[tmptail];
data = (UART_LastRxError << 8) + data;
UART_LastRxError = 0;
return 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) & UART0_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;
/* */
lastRxError = (usr & (_BV(FE1)|_BV(DOR1)) );
/* calculate buffer index */
tmphead = ( UART1_RxHead + 1) & UART1_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) & UART1_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;
/* Set baud rate */
if ( baudrate & 0x8000 )
{
UART1_STATUS = (1<<U2X1); //Enable 2x speed
baudrate &= ~0x8000;
}
UBRR1H = (unsigned char)(baudrate>>8);
UBRR1L = (unsigned char) baudrate;
/* Enable USART receiver and transmitter and receive complete interrupt */
UART1_CONTROL = _BV(RXCIE1)|(1<<RXEN1)|(1<<TXEN1);
/* Set frame format: asynchronous, 8data, no parity, 1stop bit */
#ifdef URSEL1
UCSR1C = (1<<URSEL1)|(3<<UCSZ10);
#else
UCSR1C = (3<<UCSZ10);
#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 char data;
if ( UART1_RxHead == UART1_RxTail ) {
return UART_NO_DATA; /* no data available */
}
/* calculate /store buffer index */
tmptail = (UART1_RxTail + 1) & UART1_RX_BUFFER_MASK;
UART1_RxTail = tmptail;
/* get data from receive buffer */
data = UART1_RxBuf[tmptail];
data = (UART1_LastRxError << 8) + data;
UART1_LastRxError = 0;
return 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) & UART1_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

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01_m1284p_bb00_minimum/uart_extd.h Normal file
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#ifndef UART_H
#define UART_H
/*
* Modified for different BUFFER_SIZE for UART0 && UART1
* see below: UART0_RX_BUFFER_SIZE/UART1_RX_BUFFER_SIZE && UART0_TX_BUFFER_SIZE/UART1_TX_BUFFER_SIZE
* Ibragimov M. 7/03/2015
*/
/************************************************************************
Title: Interrupt UART library with receive/transmit circular buffers
Author: Peter Fleury <pfleury@gmx.ch> http://jump.to/fleury
File: $Id: uart.h,v 1.12 2012/11/19 19:52:27 peter Exp $
Software: AVR-GCC 4.1, AVR Libc 1.4
Hardware: any AVR with built-in UART, tested on AT90S8515 & ATmega8 at 4 Mhz
License: GNU General Public License
Usage: see Doxygen manual
LICENSE:
Copyright (C) 2006 Peter Fleury
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.
************************************************************************/
/**
* @defgroup pfleury_uart UART Library
* @code #include <uart.h> @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 UART0[1]_RX_BUFFER_SIZE and UART0[1]_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 this constants to your target and your application by adding
* CDEFS += -DUART0[1]_RX_BUFFER_SIZE=nn -DUART0[1]_RX_BUFFER_SIZE=nn to your Makefile.
*
* @note Based on Atmel Application Note AVR306
* @author Peter Fleury pfleury@gmx.ch http://jump.to/fleury
*/
/**@{*/
#if (__GNUC__ * 100 + __GNUC_MINOR__) < 304
#error "This library requires AVR-GCC 3.4 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)
/** Size of the circular receive buffer UART0, must be power of 2 */
#ifndef UART0_RX_BUFFER_SIZE
#define UART0_RX_BUFFER_SIZE 32
#endif
/** Size of the circular transmit buffer UART0, must be power of 2 */
#ifndef UART0_TX_BUFFER_SIZE
#define UART0_TX_BUFFER_SIZE 32
#endif
/** Size of the circular receive buffer UART1, must be power of 2 */
#ifndef UART1_RX_BUFFER_SIZE
#define UART1_RX_BUFFER_SIZE 128
#endif
/** Size of the circular transmit buffer UART1, must be power of 2 */
#ifndef UART1_TX_BUFFER_SIZE
#define UART1_TX_BUFFER_SIZE 128
#endif
/* test if the size of the circular buffers fits into SRAM */
#if ( (UART0_RX_BUFFER_SIZE+UART0_TX_BUFFER_SIZE+UART1_RX_BUFFER_SIZE+UART1_TX_BUFFER_SIZE) >= (RAMEND-0x60 ) )
#error "size of UART0[1]_RX_BUFFER_SIZE + UART0[1]_TX_BUFFER_SIZE larger than size of SRAM"
#endif
/*
** high byte error return code of uart_getc()
*/
#define UART_FRAME_ERROR 0x1000 /* Framing Error by UART */
#define UART_OVERRUN_ERROR 0x0800 /* Overrun condition by UART */
#define UART_PARITY_ERROR 0x0400 /* Parity Error by UART */
#define UART_BUFFER_OVERFLOW 0x0200 /* receive ringbuffer overflow */
#define UART_NO_DATA 0x0100 /* 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.
*
* @param void
* @return lower byte: received byte from ringbuffer
* @return higher byte: last receive status
* - \b 0 successfully received data from UART
* - \b UART_NO_DATA
* <br>no receive data available
* - \b UART_BUFFER_OVERFLOW
* <br>Receive ringbuffer overflow.
* We are not reading the receive buffer fast enough,
* one or more received character have been dropped
* - \b UART_OVERRUN_ERROR
* <br>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
* <br>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