337 lines
9.3 KiB
C
337 lines
9.3 KiB
C
/*
|
||
* 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;
|
||
}
|
||
|