What’s the biggest difference between writing code for your big computer and a microcontroller? OK, the memory and limited resources, sure. But we were thinking more about the need to directly ...

The program in Listing 1 uses a pseudo-RETI instruction to provide a five-priority-level interrupt system for the 8051P microcontroller. The interrupt-priority order, from high to low, is INT0 IT0 ...

Every time a computer receives a network packet, completes a disk write, or a user moves the mouse, the processor handles an event known as an ...

There's an interrupt service routine invoked when the 16 bithardware timer overflows. The ISR services the hardware, increments aglobal variable named timer_hi, and returns. Therefore, timer_hi ...