Adityo Pratomo wrote:
so there's an interrupt routine there? And is the routine controlled in the arduino code, not in the pure data?
Firmata computation runs in a loop. The first step is to check for changing values at the digital inlets and immediately send them to Pd without delay. The second step is executed every 20 milliseconds. During that call, all data that was received from Pd is handled and the analog inputs are read and sent to Pd. I am not exactly sure how the second step is triggered, if it has a timer, interrupt or just runs as fast as possible. but it is definitely not triggered by Pd. marius.
On 8/17/08, marius schebella marius.schebella@gmail.com wrote:
Adityo Pratomo wrote:
Hi there everyone. Can anybody explain to me how the polling routine on firmata works when handling multiple sensors input? I'm trying to found out myself, but i still couldn't get it. Or is it actually not a polling at all?
I think arduino sends automatically, so no polling. whatever inputs are enabled/turned on, will automatically get sent by the firmata protocoll. I guess the rate is 50 times per seconds/every 20ms. and afaik the digital ins run in a separate loop that fire a message whenever there is a change.
marius.
The 20ms step is triggered on the Arduino based on a timer value.
.hc
On Aug 17, 2008, at 1:37 PM, marius schebella wrote:
Adityo Pratomo wrote:
so there's an interrupt routine there? And is the routine controlled in the arduino code, not in the pure data?
Firmata computation runs in a loop. The first step is to check for changing values at the digital inlets and immediately send them to Pd without delay. The second step is executed every 20 milliseconds.
During that call, all data that was received from Pd is handled and the
analog inputs are read and sent to Pd. I am not exactly sure how the second step is triggered, if it has a timer, interrupt or just runs as fast as possible. but it is
definitely not triggered by Pd. marius.On 8/17/08, marius schebella marius.schebella@gmail.com wrote:
Adityo Pratomo wrote:
Hi there everyone. Can anybody explain to me how the polling
routine on firmata works when handling multiple sensors input? I'm
trying to found out myself, but i still couldn't get it. Or is it actually
not a polling at all?I think arduino sends automatically, so no polling. whatever
inputs are enabled/turned on, will automatically get sent by the firmata
protocoll. I guess the rate is 50 times per seconds/every 20ms. and afaik the digital ins run in a separate loop that fire a message whenever there is a change.marius.
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