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Overview of the DP Base Interface

DP Base Programming Interface for CP 5613/CP 5614

C79000-G8976-C108-01

Using Hardware Events

After initializing the required semaphores, the following sequence can be run

through to activate and fetch events:

Step Action Meaning

1 Optional: Activate

hardware event for input

data changes (req_mask,

Section 4.3.11)

With this, the user program indicates

that it requires a semaphore to

increment if input data change.

2 Optional: Activate

hardware event for

diagnostic data

(req_mask, Section

4.3.11)

With this, the user program indicates

that it requires a semaphore to switch if

diagnostic data arrive.

Optional: Activate

hardware event for start of

cycle

(D_cycle_start_mask,

Section 4.3.11)

With this, the user program indicates

that it requires a semaphore to

increment at the start of a cycle.

4 Optional:

DP_fast_logic_on

Send fast logic job

Wait for semaphore (for

example

WaitForMultipleObjects)

The user program or the thread waits

until one of the events occurs.

"WaitForMultipleObjects" is a Windows

32-bit API function.

6 Detect the type of event The semaphore identifies the type of

event, for example, data change.

Detect the source of the

event (which slave)

Check the flags in the process image:



req_mask = DPR_DATA_CHANGE

if data changes (Section 4.3.4)



diag_count changed during

diagnostics (Section 4.3.2)

8 Read and process the

event



Read by accessing the process

image:

—

slave_in[n].data for input data

—

slave_diag[n].data for diagnostic

data

—

see Section 4.3.10 for fast logic



Pass on to other parts of the user

program.

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