avr/avr_demo
avr
/
avr_demo
mirror of
1
0
Fork 0
Code Releases Activity

Example of writing value directly to PORTD.

This commit is contained in:
Mika Tuupola 2009-12-25 17:55:36 +02:00
parent cbfdba0f68
commit b9a7ad4a88
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
til311/firmware/main.c
View File

@ -36,7 +36,12 @@ int main(void) {
while (value < 16) {
/* Toggle led at PORTB5 */
PORTB ^= _BV(PORTB5);
/* Short way would be to directly write the value to PORTD. */
/* Shift by 2 because first TIL311 port is PORTD2. However */
/* This would zero PORTD0, PORTD1, PORTD6 and PORTD7. */
/* PORTD = value << 2; */
/* TIL311 pin 3, latch data input A (1). */
if (0 == BIT_AT(value, 0)) {
PORTD &= ~(_BV(PORTD2));
@ -64,6 +69,7 @@ int main(void) {
} else {
PORTD |= _BV(PORTD5);
}
value++;
_delay_ms(500);
}