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Each of the 8051s interrupts has its own bit in the interrupt enable (IE) special function register (SFR) and is enabled by setting the corresponding bit. The code examples below are in 8051 assembly as well as C to provide a general idea of what is...
#define IE (*(volatile unsigned char *)0xA8)#define BIT(x) (1 << (x))...IE &= ~BIT(7); /* clear bit 7 of IE (EA) to disable interrupts */...IE |= BIT(0); /* set bit 0 of IE (EX0) to enable external interrupt 0 */...IE |= BIT(1); /* set bit 3 of IE (EX1) to enable external interrupt 1 */Content Under CC-BY-SA license Explore further
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