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© 2025 آي سي إس العربية. كل الحقوق محفوظة.
The Watchman is connected to the room through "wires" called GPIO pins . One wire is a Digital Input connected to a door sensor.
The ARM Cortex-M isn't the fastest brain in the world, but it is the most deterministic . In the world of embedded systems, it’s not about how much you can do—it’s about doing the right thing at the exact right microsecond, every single time, without ever taking a break.
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. 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 "wires" called GPIO pins . One wire is a Digital Input connected to a door sensor.
The ARM Cortex-M isn't the fastest brain in the world, but it is the most deterministic . In the world of embedded systems, it’s not about how much you can do—it’s about doing the right thing at the exact right microsecond, every single time, without ever taking a break.
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. He doesn't just turn the heater "on" or "off"; he "pulses" it rapidly to keep the temperature perfectly steady, like a dimmer switch.
© 2025 آي سي إس العربية. كل الحقوق محفوظة.