Need help with CAN controller

[SS.Sagar]

Posted on May 27, 2016 at 20:11

Hi,

i m using STM32F103 nucleo board. I m configuring CAN controller to receive particular message ID for Standard Identifier (CAN ID : 0x0212) Here is my configuration for acceptance filter.

CAN_FilterStruct.FilterIdHigh = 0x0000; /* Upper 16bit filter ID */
CAN_FilterStruct.FilterIdLow = 0x0123; /* Filter lower 16bit ID */
CAN_FilterStruct.FilterMaskIdHigh = 0x0000; /* Upper 16bit filter mask */
CAN_FilterStruct.FilterMaskIdLow = 0x0000; /* Lower 16bit filter mask */
CAN_FilterStruct.FilterFIFOAssignment = CAN_FILTER_FIFO0; /* Which FIFO will be assigned to filter */
CAN_FilterStruct.FilterNumber = 0;
CAN_FilterStruct.FilterMode = CAN_FILTERMODE_IDLIST; /* Identifier mask mode*/
CAN_FilterStruct.FilterScale = CAN_FILTERSCALE_32BIT; /* 32bit ID filter */
CAN_FilterStruct.FilterActivation = ENABLE; /* Enable this filter */
CAN_FilterStruct.BankNumber = 14; /* Start slave bank filter (?) */

Thanks in advance. #uart #bxcan #stm32 #nucleo

[Tesla DeLorean]

Posted on May 27, 2016 at 21:04

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You'll have to adapt to the syntax for your chosen library

/* CAN filter init */
CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;
CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_32bit;
CAN_FilterInitStructure.CAN_FilterIdHigh = (0x212 << 5); // ID 11-bit in top bits
CAN_FilterInitStructure.CAN_FilterIdLow = 0x0000;
CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0xFFE0;// ID 11-bit in top bits, mask for comparison
CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0x0000;
// if ((bitstream & CAN_FilterMaskId) == CAN_FilterId)

[SS.Sagar]

Posted on May 28, 2016 at 18:30

Hi,

Thank you.It is working !!!I have small doubt. I m sending following three messages from controller A to Controller B. 1.msg ID:2122.msg ID:3133.msg ID:212But i configured different controller B for 212 only.So, Controller B is receiving 1st msg only. Controller A is getting stuck at 2nd msg bcoz controller B is not configured for that.So controller A is not able to send 3rd msg.Is it expected?