Embedded Systems: Introduction To Armв® Cortex(t... · Must Try
The Watchman is connected to the room through "wires" called GPIO pins . One wire is a Digital Input connected to a door sensor.
Another is an , which acts like a thermometer, translating the "heat" of the room into a number the Watchman can understand. Embedded systems: introduction to ARMВ® Cortex(T...
A third wire is a signal that controls a heater. He doesn't just turn the heater "on" or "off"; he "pulses" it rapidly to keep the temperature perfectly steady, like a dimmer switch. The Watchman is connected to the room through
Sometimes, the Watchman needs to move a huge pile of logs (data) from the thermometer to a storage logbook. If he did this himself, he couldn't watch the door. So, he uses his assistant, the Direct Memory Access (DMA) controller. He tells the DMA, "Move these 100 readings to memory and let me know when you're done." The Watchman stays focused on the big picture while the data moves in the background. A third wire is a signal that controls a heater
The Watchman is connected to the room through "wires" called GPIO pins . One wire is a Digital Input connected to a door sensor.
Another is an , which acts like a thermometer, translating the "heat" of the room into a number the Watchman can understand.
A third wire is a signal that controls a heater. He doesn't just turn the heater "on" or "off"; he "pulses" it rapidly to keep the temperature perfectly steady, like a dimmer switch.
Sometimes, the Watchman needs to move a huge pile of logs (data) from the thermometer to a storage logbook. If he did this himself, he couldn't watch the door. So, he uses his assistant, the Direct Memory Access (DMA) controller. He tells the DMA, "Move these 100 readings to memory and let me know when you're done." The Watchman stays focused on the big picture while the data moves in the background.