External I/O devices are typical memory mapped. You may simulate
such I/O devices with the Memory Window provided in the µVision3
debugger. Since the C user program does not contain any variable
declarations for such memory regions it is required that you map this
memory with the MAP command:
MAP 0x100000, 0x100FFF READ WRITE /* MAP memory for I/O area */
You may use breakpoints in combination with debug functions to
simulate the logic behind the I/O device.
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