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Send Data and recieve back
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Date: 2007/11/18 13:24
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By: Darren
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Status: Visitor
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Hi there,
I've builded the circuit and till know, it all works fine. There's one thing though, I am trying to do like another DO_SUM methos. Instead of sending 2 numbers and recieving one, I am sending 4 numbers (send_buff[1], send_buff[2], send_buff[3] and send_buff[4] and using send_buff[0] for the address). The firmware method in the user.c fileI am adding this case
case DO_SUM2:
dataPacket._byte[1] = dataPacket._byte[1] + dataPacket._byte[2];
dataPacket._byte[2] = dataPacket._byte[3] + dataPacket._byte[4];
counter = 0x02;
break;
the wrong thing is that the first 2 values (dataPacket._byte[1] and dataPacket._byte[2]) are adding but the secong 2 values are not. I am recieving only the addition of the first two value. In the C# softwar, to get the data back, I a writing
int a = Convert.ToInt32(recieve_buff[1]);
int b = Convert.ToInt32(recieve_buff[2]);
But as I said, I am getting a value back only from recieve_buff[1]. How can I get the other value.? and aother thing. What does the counter = 0x02 mean exactly?
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Re:Send Data and recieve back
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Date: 2007/11/23 11:41
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By: dariog
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Status: User
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Karma: 6
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| Posts: 107 |   |
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I don't know your circuit/firmware: but are you sure that it is designed to return more than 1 (or 2) bytes? Could you check its descriptors?
The "counter" should indeed specify how many significant bytes are returned, but this number will never be larger than Endpoint size...
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