reading rtdx

now that I have a model working with an rtdx block inside, it is time to attempt to read the data.

I have created rtdx initialise, finalise and communication.

I think that this is the plan:

run initialise
run communitation where the first thing that is done is stop the acquisition

I attempted to use a while loop to read in the data:

% read in the data
i = 0;
while num_of_HE_data ~= 0
i=i+1;
HE_vector = cc.rtdx.readmsg('ochan_HE','int16',[2 1],1);
HE_data(i) = HE_vector(2);
num_of_HE_data = cc.rtdx.msgcount('ochan_HE');
end

but for some reason:

HE_vector = cc.rtdx.readmsg('ochan_HE','int16',[2 1],1);

was printed everytime

it also did that for the if version

num_of_HE_data = cc.rtdx.msgcount('ochan_HE');

for i = 1: num_of_HE_data
HE_vector = cc.rtdx.readmsg('ochan_HE','int16',[2 1],1);
HE_data(i,1) = HE_vector(2);
end

I think that the while version is a little more robust in that it can cope with new data but now that I think about it, it is probably better if that does not happen as that would possibly allow data in the wrong order.

USE THE IF VERSION

I am a bit concerned that there is always 12545 messages

originally there was a slowly increasing number of meassages

maybe I should check if there are always the same messages

initialse'
communicate
finalise
initialise
communicate and chnage the variable
finalise

why 12545?

I thought that that may be to do with the buffer that I created but I left that out of the initialisation code. I should put that back later.

Each lot of data is exactly the same: flush does not seem to be working. I will try stopping the processor.

stopping the processor does not work. Try rebuilding the mdl

does not seem to work - num of msgs is 12545 immediately

but the data is different

I need a quicker way of clearing all that data - why is flush not working?

I have tried resetting the cpu.

now there are always no messages???

I added the buffers incase that was an issue - not

I discoverd that in the initialisation file, I was not:

% enable the RTDX interface
cc.rtdx.enable;

now it is working again. I still have to figure out how to clear the old data without resetting the cpu.

Now it seems that I am getting new data. I assume that what was happening before was that I was not reading in any new data as I was not enabling the interface.