Posted: Tue Dec 19, 2023 10:53 am Post subject: DMX Slave - startbyte
HI,
"normel" DMX starts with a start byte value of 0. If RDM will be used... the start byte will have a different value. In that case DMXslave will not store data.
Is there a chance to adjust DMXslave to receive data following a different start byte value?
Is there an internal variable of the received start byte value?
(BASCOM-AVR version : 2.0.8.6 ) _________________ CU
Manfred
Posted: Tue Dec 19, 2023 11:37 am Post subject: Re: DMX Slave - startbyte
kartmanne wrote:
Is there a chance to adjust DMXslave to receive data following a different start byte value?
The DMX-slave can be found in MCS.lib, it is built as state machine waiting for zero, the exact opcode where that happens is
Code:
cpi r24,0
Quote:
Is there an internal variable of the received start byte value?
No, but the constant based compare can be exchanged with a variable one
Code:
* lds r16, {cust_startbyte}
cp r24,r16
cust_startbyte must be dim'd as byte in main code.
To alter the DMX-function, it is the better way NOT to write to and mess up MCS.lib itself, but to copy the complete DMX-code from MCS.lib into a custom lib.
This custom lib can be altered and included via $LIB directive into code and overrides the original function.
Means by not including custom.lib the original MCS.lib-function is used again and no mess is left.
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