http://mspgcc.sourceforge.net/manual/x214.html the msp430 alignment joy.
cheers, maxime Jose L. Ponce a écrit :
Hi, I was able to solve the problem: I noticed that there was something wrong with the uint16 field: I programmed the mote to unpack the message and pack it in another one to be sent back to the computer. If I sent 0x0a05 the return message would be 0x0a00. I tried to divide the uint16 field in two uint8 fields (high and low), and with that everything worked. To cut a long story short, after a long hours of desperation, I did the simplest thing I could think of. If my message structure was: struct DimmerControlMSG { uint8_t todo; uint16_t val; }; I changed it for: struct DimmerControlMSG { uint16_t val; uint8_t todo; }; And now everything's working!! Any comments on this? Is this something which happens often? -Jose. On Tue, 2006-03-21 at 18:04 +0100, Jose L. Ponce wrote:Hi all, I want to control the DAC of my telosb mote using commands from the computer through the USB port. For that, I've programmed an application which receives a message with two fields: uint8_t for the command and uint16_t for the value we want to set the DAC to. There are two commands: set (1), with a value, to set the DAC, and show, without a value, to see to which value the DAC is set to (when issuing a set command, the mote returns the DAC value as well). On the computer side, the commands are issued using a small java application: java Dimmer set X java Dimmer show The problem is that the value field (uint16_t) is not recognised: I will issue java Dimmer set 10 ten times and each time I will get a different DAC output and a different return value from the mote. I have tried to modify my message type and have the value field as a uint8_t. In this way, issuing a set command from 0 to 256 will give me right values. Above that, it doesn't seem to work anymore. Can anyone enlighten me a little on what I am doing wrong? It'd be much appreciated. Below I include the relevant code. Thanks, - Jose. // DimmerControlM.nc (on the mote) // DimmerControlMSG has two fields: todo (uint8_t) and value (uint16_t) task void sendMsg(){struct DimmerControlMSG* sen; sen = (struct DimmerControlMSG *)outw.data;sen->value = value; call SendMsg.send( TOS_UART_ADDR, sizeof(struct DimmerControlMSG), &outw); } event TOS_MsgPtr ReceiveMsg.receive( TOS_MsgPtr inw ){ struct DimmerControlMSG* rec; rec = (struct DimmerControlMSG *)inw->data; if( rec->todo & 0x1 ) { value=rec->value; if(call DAC.output(value) == SUCCESS) call Leds.redToggle(); } post sendMsg(); return inw; } _______________________________________________ Tinyos-help mailing list [email protected] https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help_______________________________________________ Tinyos-help mailing list [email protected] https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
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