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From now on, flash with ISP. Bootloader of Adafruit feather is trash.

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Marco 2022-05-11 22:21:00 +02:00
parent 609deed11e
commit 9cb9d7f3a8
3 changed files with 25 additions and 89 deletions
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2
Makefile
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@ -17,7 +17,7 @@ $(TARGET): $(SRC)
rm $@.elf rm $@.elf
flash: flash:
avrdude -p m32u4 -P /dev/ttyACM0 -c avr109 -Uflash:w:"$(TARGET).hex":i avrdude -p m32u4 -P /dev/ttyACM0 -c stk500v2 -Uflash:w:"$(TARGET).hex":i
clean: clean:
rm -fr ./src/*.o ./build/ rm -fr ./src/*.o ./build/

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docs/Pinout-NANO_latest.pdf
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110
src/inverter.c
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@ -1,110 +1,46 @@
#include <avr/io.h> #include <avr/io.h>
#include <util/delay.h> #include <util/delay.h>
#include <avr/interrupt.h> #include <avr/interrupt.h>
#include <stdio.h>
void togglePin(uint8_t port, uint8_t pin); #include "include/uart.h"
#include "include/timer.h"
void initCtcTimer0(void);
void initOverflowTimer0(void);
void initOverflowTimer1(void);
void initUart(unsigned int baud);
void uart_sendByte(uint8_t byte);
int uart_printf(char var, FILE *stream);
static FILE stream = FDEV_SETUP_STREAM(uart_printf, NULL, _FDEV_SETUP_WRITE);
uint8_t sec = 0; uint8_t sec = 0;
uint16_t cnt = 0;
int main() int main()
{ {
stdout = &stream; /* With this MCU frequency, it is 38,4k baud */
uart_init(12);
/* Make PB1 & PB2 an output pin */ /* Make PB2 an output pin */
DDRB |= (1 << DDB1);
DDRB |= (1 << DDB2); DDRB |= (1 << DDB2);
/* With this frequency, it is 38,4k baud */ initCtcTimer0();
initUart(12);
sei();
while (1) { while (1) {
_delay_ms(1000);
printf("Seconds passed: %u\n\r", sec++); if ((PORTB & (1 << PB2)) > 1)
{
_delay_ms(1);
PORTB &= ~(1 << PB2);
}
if (cnt == 65500) {
printf("%u\n\r", TCNT0);
cnt = 0;
}
cnt++;
} }
return 0; return 0;
} }
void initCtcTimer0(void)
{
/* Initialize counter 0 */
TCNT0 = 0;
/* Enable Counter0 Compare Match A Interrupt */
TIMSK0 |= (1 << OCIE0A);
/* Select clock. Prescaler of 0*/
TCCR0B |= (1 << CS00);
/* Use CTC Mode */
TCCR0A |= (1 << WGM01);
/*
* OCR0A contains TOP value for counter:
*/
OCR0A = 200;
}
void initOverflowTimer0(void)
{
/* Prescaler = 0 */
TCCR0B |= (1<<CS00);
/* Enable Timer Overflow Interrupt */
TIMSK0 |= (1<<TOIE0);
}
void initOverflowTimer1(void)
{
TCCR1B |= (1<<CS11);
TIMSK1 |= (1<<TOIE1);
}
ISR(TIMER0_COMPA_vect) ISR(TIMER0_COMPA_vect)
{ {
PORTB ^= (1 << PB2); PORTB |= (1 << PB2);
}
void initUart(unsigned int baud)
{
/* Set baud rate */
UBRR1H = (unsigned char)(baud>>8);
UBRR1L = (unsigned char)baud;
/* Enable receiver and transmitter */
UCSR1B = (1<<RXEN1)|(1<<TXEN1);
/* Set frame format */
UCSR1C |= (3<<UCSZ10); // 8 data bits
// UCSR1C &= ~(1<<USBS1); // 1 stop bit
}
void uart_sendByte(uint8_t byte)
{
/* Wait for empty transmit buffer */
while (!(UCSR1A & (1<<UDRE1)))
{
}
/* Put data into buffer, sends the data */
UDR1 = byte;
}
int uart_printf(char var, FILE *stream)
{
uart_sendByte(var);
return 0;
} }