Refreshing of paramters need Queued Messages? - E1.20 RDM (Remote Device Management) Protocol Forums

ericthegeek · March 2nd, 2010

> issuing new software for existing products.

Having spent hundreds of hours in 8051 assembly lately, I understand...

Using a real queue you could do it in 3 bytes per message (1 byte for the sub-device and 2 bytes for the PID).

If you use bit packing and have 32 sub-devices that support 50 PIDs each, you can store the entire queue state in 200 bytes. Map each possible queued message to a bit and set the associated bit whenever that PID's data changes and needs to be reported to the controller.

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March 2nd, 2010	#12
ericthegeek Task Group Member Join Date: Aug 2008 Posts: 390	> issuing new software for existing products. Having spent hundreds of hours in 8051 assembly lately, I understand... Using a real queue you could do it in 3 bytes per message (1 byte for the sub-device and 2 bytes for the PID). If you use bit packing and have 32 sub-devices that support 50 PIDs each, you can store the entire queue state in 200 bytes. Map each possible queued message to a bit and set the associated bit whenever that PID's data changes and needs to be reported to the controller.