[Ovmsdev] Problem with sending CAN-message

[Geir Øyvind Vælidalo]

Thanks for the answers guys! I was in the car and the code was correct. However CANWRITE might have been disabled as sometimes debugging clears the features, and that happened actually yesterday. 
I’m not sure what did the trick, but I simplified some of my code, forced the CANWRITE and I reset the parameters so today I managed to lock and unlock my car from OVMS :-)

Geir


> 12. jan. 2016 kl. 00.40 skrev Mark Webb-Johnson <mark at webb-johnson.net>:
> 
> Things to check:
> 
> That CANWRITE is really set to 1.
> 
> That you are running this in the car, not on your workbench. If workbench, make sure you have at least two CAN devices in active mode on the bus, and termination resistors in place. It won’t work with just the OVMS module on its own as CAN requires at least two active nodes on the network.
> 
> Example code:
> 
> while (TXB0CONbits.TXREQ) {} // Loop until TX is done
> TXB0CON = 0;
> TXB0SIDL = 0b01000000; // Setup 0x102
> TXB0SIDH = 0b00100000; // Setup 0x102
> TXB0D0 = 0x06;
> TXB0D1 = 0x2c;
> TXB0D2 = 0x01;
> TXB0D3 = 0x00;
> TXB0D4 = 0x00;
> TXB0D5 = 0x09;
> TXB0D6 = 0x10;
> TXB0D7 = 0x00;
> TXB0DLC = 0b00001000; // data length (8)
> TXB0CON = 0b00001000; // mark for transmission
> while (TXB0CONbits.TXREQ) {} // Loop until TX is done
> 
> Regards, Mark.
> 
>> On 12 Jan 2016, at 6:43 AM, Michael Balzer <dexter at expeedo.de <mailto:dexter at expeedo.de>> wrote:
>> 
>> Geir,
>> 
>> do you set the data length (TXB0DLC)?
>> 
>> Regards,
>> Michael
>> 
>> 
>> 
>> Am 11.01.2016 um 22:50 schrieb Geir Øyvind Vælidalo:
>>> Hi guys!
>>> 
>>> I’m trying to send a can-messages. I copied the code from the Twizy-code, but it seems to fail for me.
>>> This is the code for sending: 
>>>  while (TXB0CONbits.TXREQ) {};  <— This one is ok
>>>  TXB0CON = 0; TXB0SIDL = (ks_send_can.id & 0x07) << 5; 
>>>  TXB0SIDH = (ks_send_can.id >> 3); 
>>>  TXB0D0 = ks_send_can.byte[0]; 
>>>  TXB0D1 = ks_send_can.byte[1];
>>>  ...
>>>     TXB0CON = 0b00001000;  //Mark the message for sending
>>>  while (TXB0CONbits.TXREQ) {};  <— Here it hangs
>>> 
>>> TXREQ seems like it never gets cleared :-\ I have CAN Write enabled, so that is not the problem.
>>> 
>>> Any ideas? 
>>> 
>>> Best regards,
>>> Geir
>>> 
>>>  
>>> 
>>> 
>>> _______________________________________________
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>> 
>> -- 
>> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>> Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>> <dexter.vcf>_______________________________________________
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