This week our assignment is to use the board we designed in the 6th week to do something. According the datasheet, Attiny44 is a AVR Micro-controller which contains 4K Bytes of In-System Programmable Program Memory Flash.
Pin Configurations of Attiny44
Pin Configurations of ISP
I connect the board with FabISP. FabISP works as a programmer. Then programming by Cygwin64
Sample code : blink.c ( A program for one LED Control with switch)
#include
#include
#include
#define output(directions,pin) (directions |= pin) // set port direction for output
#define set(port,pin) (port |= pin) // set port pin
#define clear(port,pin) (port &= (~pin)) // clear port pin
#define pin_test(pins,pin) (pins & pin) // test for port pin
#define bit_test(byte,bit) (byte & (1 << bit)) // test for bit set
#define position_delay() _delay_ms(1000)
//define pin, I/O,
#define LED_port PORTB
#define LED_direction DDRB
#define LED_pin (1 << PB2)
int main(void){
//clock
CLKPR = (1 << CLKPCE);
CLKPR = (0 << CLKPS3) | (0 << CLKPS2) | (0 << CLKPS1) | (0 << CLKPS0);
//LED
output(LED_direction, LED_pin); //Pin OUTPUT指定
clear(LED_port, LED_pin); //clear pinport LOW
//loop
while(1){
set(LED_port, LED_pin);
_delay_ms(2000); //2000ms
clear(LED_port, LED_pin);
_delay_ms(500); //500ms
}
}
I've never did a computer program before, so started with Neil's program and Guidance program, and I learned:
I can use the # include and # define each time by copy and paste. Then, int main can be used as function defined by # define
Write the programs that need to be process every time in while(1){ }
set(LED_port,LED_pin);
LED→ON
clear(LED_port,LED_pin);
LED→OFF
_delay_ms_();
Can be specified as mm seconds to wait
Then I made a program, when I press the button, the LED will be light.
