/*
* MAIN Generated Driver File
*
* @file main.c
*
* @defgroup main MAIN
*
* @brief This is the generated driver implementation file for the MAIN driver.
*
* @version MAIN Driver Version 1.0.2
*
* @version Package Version: 3.1.2
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* File: avr-main.c
* Author: User501
*
* Created on November 4, 2024, 5:27 PM
*
* * RoboTiny
*
* MPLAB X ATTINY3226-SU Tester
*
* @category MPLAB X ATTINY3226-SU Advanced Blink
* @package C++ Alarm Sketch
* @author C.A Torino
* @version V1.0.0
* @since 4th Nov 2024
* @hardware ATTINY3226-SU Modified
* @notes null
Pin out of the ATTINY3226-SU:
20 pin SOIC, SSOP
__ __
1 VDD |1 \/20| GND
2 PA4 |2 19| PA3 (EXTCLK)
3 PA5 |3 18| PA2
4 PA6 |4 17| PA1
5 PA7 |5 16| PA0 (UPDI/RESET)
6 PB5 |6 15| PC3
7 PB4 |7 14| PC2
8 PB3 |8 13| PC1
9 (TOSC1)PB2 |9 12| PC0
10 TOSC2 PB1 |10 11| PB0
-------
ATtiny826
Packs
ATtiny_DFP (3.1.260)
PICkit 5 (2.6.557)
Compiler Toolchain
XC8 (v2.50) [C:\Program Files\Microchip\xc8\v2.50\bin]
Production Image: Optimization: +space +asm
Device support information: ATtiny_DFP (3.1.260)
Memory
Data 1,024 (0x400) bytes
Data Used: 1.3%
Data Used: 13 (0xD) Free: 1,011 (0x3F3)
Program 8,192 (0x2000) bytes
Program Used: 6.3%
Program Used: 516 (0x204) Free: 7,676 (0x1DFC)
*/
//this gives an accurate time
#define F_CPU 2500000// 2.5Mhz; cpu frequency in Hz
#include <avr/io.h>//AVR functions
#include <avr/interrupt.h>// for interrupts
#include <util/delay.h>//for delay
#define D_LED_AMOUNT 1//define led amount
const uint16_t interval_time = 2000;// interval at which to blink (milliseconds)
const uint8_t LEDS[D_LED_AMOUNT] = {
PIN3_bm//PA3 LED
};
const uint16_t ON_TIME = 10;//LED on time 10ms=good as well, 50=good flash
volatile uint32_t MIL_counter = 0;// millis counter variable
uint32_t interval, nowmillis, previousMillis = 0;// for timing calculation in millis
_Bool AN_LED_BLINKING = 0;//LED blinking set to false=0
// Init millis counter
void MIL_init(void) {
TCB1.CCMP = (F_CPU / 1000) - 1; // set TOP value (period)
TCB1.CTRLA = TCB_ENABLE_bm; // enable timer/counter
TCB1.INTCTRL = TCB_CAPT_bm; // enable periodic interrupt
}
// Read millis counter
uint32_t MIL_read(void) {
cli(); // disable interrupt for atomic read
uint32_t result = MIL_counter; // read millis counter
sei(); // enable interrupt again
return result; // return millis counter value
}
// TCB0 interrupt service routine (every millisecond)
ISR(TCB1_INT_vect) {
TCB1.INTFLAGS = TCB_CAPT_bm; // clear interrupt flag
MIL_counter++; // increase millis counter
}
void PIN_config()
{
//all pins start as an input but it's good to make a human readable note
VPORTA.DIR = 0b11111111; //read from right to left: 0b11111111 same as p7=1 p6=1 p5=1 p4=1 p3=1 p2=1 p1=1 p0=1; 1=output 0=input
}
void DISABLE_peripherals()
{
ADC0.CTRLA = 0;//Disable ADC, saves ~230uA
TCA0.SPLIT.CTRLA = 0; //If you aren't using TCA0 for anything
TCB0.CTRLA = 0; //disable TCB0
USART0.CTRLA = 0;//disable USART
SPI0.CTRLA = 0;//disable SPI
BOD.CTRLA = 0;//disable bod
AC0.CTRLA = 0;//disable ACl
//DAC0.CTRLA = 0;//disable DAC (not used in Tiny-2 series)
}
void Blink_LED_Blocking() {
VPORTA.OUT |= LEDS[0]; // LED HIGH
_delay_ms(interval_time);//blocking delay
VPORTA.OUT &= ~LEDS[0]; // LED LOW
_delay_ms(interval_time);//blocking delay
}
void Blink_LED_Non_Blocking(uint32_t currentMillis) {
if (currentMillis - previousMillis >= interval_time) {//set rollover and calculate delay time
previousMillis = currentMillis;//set millis global var
VPORTA.IN |= LEDS[0];//toggle LED
}
}
void Blinking_Fast(uint32_t currentMillis) {
if(AN_LED_BLINKING)//if LED is HIGH
{
if( (currentMillis - previousMillis) >= ON_TIME)//on time check rollover
{
AN_LED_BLINKING = 0;// change the state of LED
previousMillis = currentMillis;// remember Current millis() time
}
}
else
{
if( (currentMillis - previousMillis) >= interval_time)//check off time rollover
{
AN_LED_BLINKING = 1;// change the state of LED
previousMillis = currentMillis;// remember Current millis() time
}
}
for (uint8_t i = 0; i < D_LED_AMOUNT; i++) //0,1,2,3 first 4
{
if(AN_LED_BLINKING)//if LED is blinking
{
VPORTA.OUT |= LEDS[i];// LED HIGH
}
if(!AN_LED_BLINKING)//if LED is not blinking
{
VPORTA.OUT &= ~LEDS[i];// LED LOW
}
}
}
int main(void)
{
//volatile uint32_t MIL_counter;
PIN_config();//configure the pins
DISABLE_peripherals();//disable unused
MIL_init();//initiate harware timer TCB1
while(1)
{
nowmillis = MIL_read();// read custom DIY millis counter
Blinking_Fast(nowmillis);//Blink LED fast
//Blink_LED_Non_Blocking(nowmillis);//Blink LED non blocking delay
//Blink_LED_Blocking();//Blink Blocking
}
}
