test._c

一个LED特效显示程序

TWCR = (1<<TWINT)|(1<<TWSTA)|
(1<<TWEN)
while (!(TWCR & (1<<TWINT)))
;
if ((TWSR & 0xF8) != START)
ERROR();
TWDR = SLA_W;
TWCR = (1<<TWINT) | (1<<TWEN);
while (!(TWCR & (1<<TWINT)))
;
if ((TWSR & 0xF8) != MT_SLA_ACK)
ERROR();
TWDR = DATA;
TWCR = (1<<TWINT) | (1<<TWEN);
while (!(TWCR & (1<<TWINT)))
;
if ((TWSR & 0xF8) != MT_DATA_ACK)
ERROR();
TWCR = (1<<TWINT)|(1<<TWEN)|
(1<<TWSTO);