[Ovmsdev] Problem with sending CAN-message

[Mark Webb-Johnson]

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> 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
>> 
>>  
>> 
>> 
>> _______________________________________________
>> OvmsDev mailing list
>> OvmsDev at lists.teslaclub.hk <mailto:OvmsDev at lists.teslaclub.hk>
>> http://lists.teslaclub.hk/mailman/listinfo/ovmsdev <http://lists.teslaclub.hk/mailman/listinfo/ovmsdev>
> 
> -- 
> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
> Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
> <dexter.vcf>_______________________________________________
> OvmsDev mailing list
> OvmsDev at lists.teslaclub.hk
> http://lists.teslaclub.hk/mailman/listinfo/ovmsdev

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openvehicles.com/pipermail/ovmsdev/attachments/20160112/8f4d184f/attachment.htm>