controll only 1 bit from 1 byte
Guest
#3027556
AVR Studio - ATmega8 - myAVR.de MK2 Board Hi im learning to switch 2 leds on and off. my problem: how can i control only 1 bit of the whole port?
The problem: the second i turn on number 2, i also turn off number one. Is there a way of saying Byte.Bit, or PORTC.firstBit thanks for your help
Guest
#3027560
You can do this with bit manipulation, and, or, exor. PORTD |= (1<<PD0); // sets PD0 PORTD &= ~(1<<PD0); // clears PD0 PORTD ^= (1<<PD1); // toggles PD1
Guest
#3027563
you can use this
struct bits {
uint8_t b0:1;
uint8_t b1:1;
uint8_t b2:1;
uint8_t b3:1;
uint8_t b4:1;
uint8_t b5:1;
uint8_t b6:1;
uint8_t b7:1;
} __attribute__((_packed_));
#define SBIT_(port,pin) ((*(volatile struct bits*)&port).b##pin)
#define SBIT(x,y) SBIT_(x,y)
SBIT(PORTC,0) = 0;
SBIT(PORTC,1) = 1;
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