Peter Chubb has long been working on a project to move device drivers into user space. Getting drivers out of the kernel, he points out, would have a number of benefits. Faults in drivers (the source ...

Felipe Balbi recently posted a driver called twl4030-pwrbutton, which generates input events when somebody hits a power button connected through a twl4030 i2c controller. It is, in many ways, a ...

For most UNIX systems, Linux included, device drivers typically divide the work of processing interrupts into two parts or halves. The first part, the top half, is the familiar interrupt handler, ...

Endian format refers to how multibyte variables are stored in a byte-wide memory. In 'big endian' format, the most significant byte is stored in the first byte (lowest address). In 'little endian' ...

This chapter shows how the WdmIo and PHDIo drivers handle interrupts, use Deferred Procedure Calls (DPCs), and catch time-outs. It shows how Read and Write interrupt-driven I/O is started and ...

Just as you can often treat device registers as a memory-mapped struct, you can treat an interrupt vector as a memory-mapped array. In my last column, I suggested that you use casts sparingly and with ...

This application note presents the RX family of microcontrollers on using multiple interrupts. The document includes the specifications, the operation confirmation conditions, the hardware and ...

Performance is a topic that never strays far from the mind of most embedded systems developers. However, relatively speaking, many of us have it easy. We develop soft real-time systems in which a few ...

We seen how timers and interrupts work in MBasic (Chapter 10) and learned a bit about assembler programming (Chapter 13) and how to mix assembler with MBasic (Chapter 14). It's time now to fuse these ...