FlexCAN

Nerone — Sun, 17 Dec 2006 00:47:52 GMT

I am a newbie with the flexCAN. I have two 56f8300DEMO boards and I want experiment connect them with CAN. I've not freescaleCAN bean licensed so I need for a very simple example code for tx and rx tasks. I tried to develop my own code, but only tx work, no rx.

I appreciate some help to me.

thanks in advance

Re: FlexCAN

admin — Thu, 29 Oct 2020 08:40:34 GMT

Code:

volatile word* data_base = &FCMB0_DATA0;volatile word* control_base = &FCMB0_Control;volatile word* data_reg;volatile word* control_reg;#define reg_offs 0x8...void Readbuff(byte numbuf, byte* data){   byte i, RxCode, length;      data_reg = data_base + numbuf*reg_offs;   control_reg = control_base + numbuf*reg_offs;         RxCode = (*control_reg & 0xF0)>>4;  /* read RxCode */     *control_reg = (*control_reg & 0xFF0F); /* hold inactive Rx buffer */   length = (byte)(*control_reg & 0x0F); /* length of the received message */   for (i=0; i<length/2; i++)   {      *data++ = (byte)(*data_reg >> 8);      *data++ = (byte)(*data_reg);   }   if (length & 1)   *data = (byte)(*data_reg);  *control_reg = 0x40; /* set the message buffer code = Empty*/}....// CAN Tx-Rx interrupt function#pragma interrupt alignsp saveallvoid CANInterrupt(void){   byte rxBuff[8];      word BufFlags = getReg(FCIFLAG1);   setReg(FCIFLAG1,BufFlags);  /* clear interrupt flags */   if ((BufFlags & 0x02) > 0)  /* MB1 transmit */   {//  after transmition action code here   }   if ((BufFlags & 0x01) > 0)  /* MB0 receive */   {      Readbuff(0,rxBuff);//  another receive action code here   }}

Try this code. This is simple example of read of the received DATA frame from CAN buffer 0.

Message Edited by Alexey on 2006-12-2312:32 PM

Re: FlexCAN

Nerone — Sun, 24 Dec 2006 00:08:24 GMT

Thanks you!

S12 / MagniV Microcontrollers中的主题 Re: FlexCAN

FlexCAN

Re: FlexCAN

Re: FlexCAN