LPC11C24 CAN Send test problem

funa — Sun, 30 Sep 2018 07:48:35 GMT

With OM13093.I took two wires in TXD and RXD, measured with an oscilloscope, and then run the following program. Found no signal. It was found that VCC is always 0. Does VCC requires an external power supply?

while(1) {
       msg_obj.msgobj = 0;
       msg_obj.mode_id = 0x345;
       msg_obj.mask    = 0x0;
       msg_obj.dlc     = 4;
       msg_obj.data[0] = 'T';   // 0x54
       msg_obj.data[1] = 'E';   // 0x45
       msg_obj.data[2] = 'S';   // 0x53
       msg_obj.data[3] = 'T';   // 0x54
       LPC_CCAN_API->can_transmit(&msg_obj);
       for(j=0;j<1000000;j++) {
           ;
       }
       Board_LED_Toggle(0);
   }

Re: LPC11C24 CAN Send test problem

soledad — Mon, 01 Oct 2018 21:41:38 GMT

Hi,

It is not normal that VCC=0v. It is not necessary additional supply for VCC.
where are you doing this measurement? do you have additional connections?

Have a great day,
Sol

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