rtd DM5816, User Manual

Page: 27 / 44

DM5816/DM6816 RTD Embedded Technologies, Inc.
27
A write enables P14 interrupts and selects whether the interrupt will occur on the positive (rising) edge or
negative (falling) edge of the pulse. Bit 2 is used to enable and disable the interrupt sharing circuit. If you
are not using shared interrupts, it is best to disable this feature to ensure compatibility with all CPUs.
BA + 17: IRQ Status (Read Only)
A read shows the status of the jumper-selectable interrupt circuit at P14.
BA + 18: Reserved
BA + 19: Reserved
Programming the DM5816
This section gives you some general information about programming and the DM5816
The module is programmed by reading from and writing to the correct I/O port locations. These I/O ports
were defined in the previous section. Most high-level languages such as BASIC, Pascal, C, and C++,
and of course assembly language, make it very easy to read/write these ports. The table below shows
you how to read from and write to I/O ports using some popular programming languages.
In addition to being able to read/write the I/O ports on the DM5816, you must be able to perform a variety