Working with atmega16a-pu and the blue atmel 6 pin isp (the $35-$50 one) on ubuntu

ledblink.c

//avr-gcc -Wall blink.c -mmcu=atmega16 -DF_CPU=1000000UL -o blink.o
//sudo avr-objcopy -O ihex -R .eeprom blink.o blink.hex
//sudo chmod a+rw /dev/ttyS0 #not sure if this matters
//sudo avrdude -p atmega16 -c avrisp2 -U flash:w:blink.hex

#include <avr/io.h>

// define what pins the LEDs are connected to.
// in reality, PD6 is really just '6'
#define LED PA0
 
// Some macros that make the code more readable
#define output_low(port,pin) port &= ~(1<<pin)
#define output_high(port,pin) port |= (1<<pin)
#define set_input(portdir,pin) portdir &= ~(1<<pin)
#define set_output(portdir,pin) portdir |= (1<<pin)
 
// this is just a program that 'kills time' in a calibrated method
void delay_ms(uint8_t ms) {
  uint16_t delay_count = F_CPU / 17500;
  volatile uint16_t i;
 
  while (ms != 0) {
    for (i=0; i != delay_count; i++);
    ms--;
  }
}
 
int main(void) {
  // initialize the direction of PORTD #6 to be an output
  set_output(DDRA, LED);  
 
  while (1) {
    // turn on the LED for 200ms
    output_high(PORTA, LED);
    delay_ms(200);
    // now turn off the LED for another 200ms
    output_low(PORTA, LED);
    delay_ms(200);
    // now start over
  }
}