Rabbit OP7100 User Manual download pdf (Page 106)

OP7100106

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 Memory, I/O Map, and Interrupt Vectors

Table C-5. Interrupt Vectors for Z180 Internal Devices

Address Name Description

— INT0 Available for use.

0x00 INT1_VEC Used for power-failure detection

0x02 INT2_VEC Reserved for Development Board (CM7100),

not available for use on CM7200

0x04 PRT0_VEC PRT Timer Channel 0

0x06 PRT1_VEC PRT Timer Channel 1

0x08 DMA0_VEC DMA Channel 0

0x0A DMA1_VEC DMA Channel 1

0x0C CSI/O_VEC Available for programming (CM7200), not

available for use on CM7100

0x0E SER0_VEC Asynchronous Serial Port Channel 0

0x10 SER1_VEC Asynchronous Serial Port Channel 1

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Interrupt Vectors

Table C-5 presents a suggested interrupt vector map. Most of these

interrupt vectors can be altered under program control. The addresses are

given here in hex, relative to the start of the interrupt vector page, as

determined by the contents of the I-register. These are the default interrupt

vectors set by the boot code in the Dynamic C EPROM.

To “vector” an interrupt to a user function in Dynamic C, use a directive

such as the following.

#INT

VEC 0x10 myfunction

The above example causes the interrupt at offset 0x10 (Serial Port 1 of the

Z180) to invoke the function myfunction(). The function must be

declared with the interrupt keyword, as shown below.

interrupt myfunction() {

...

}

Refer to the Dynamic C manuals for further details on interrupt

functions.

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Rabbit OP7100 User Manual Page 106