70353C datasheet(47/76 Pages) MICROCHIP

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DS70353C-page 21-47

Section 21. Enhanced Controller Area Network (ECAN™)

Example 21-4:

Code Example for Filtering Standard Data Frame (Continued)

A code example used to configure acceptance filter 2 to receive EID messages using the

acceptance filter mask register to mask EID<5:0> bits is shown in Example 21-5.

/* Select Acceptance Filter Mask 0 for Acceptance Filter 0 */

C1FMSKSEL1bits.F0MSK=0x0;

/* Configure Acceptance Filter Mask 0 register to mask SID<2:0>

* Mask Bits (11-bits) : 0b111 1111 1000 */

C1RXM0SIDbits.SID = 0x7F8;

/* Configure Acceptance Filter 0 to match standard identifier

Filter Bits (11-bits): 0b011 1010 xxx with the mask setting, message with SID

range 0x1D0-0x1D7 will be accepted by the ECAN module. */

C1RXF0SIDbits.SID = 0x01D0;

/* Acceptance Filter 0 to check for Standard Identifier */

C1RXM0SIDbits.MIDE = 0x1;

C1RXF0SIDbits.EXIDE= 0x0;

/* Acceptance Filter 0 to use Message Buffer 10 to store message */

C1BUFPNT1bits.F0BP = 0xA;

/* Filter 0 enabled for Identifier match with incoming message */

C1FEN1bits.FLTEN0=0x1;

/* Clear Window Bit to Access ECAN

* Control Registers */

C1CTRL1bits.WIN=0x0;

/* Place the ECAN module in normal

* mode. */

C1CTRL1bits.REQOP = 0;

while(C1CTRL1bits.OPMODE != 0);

/* The following code shows one example of how the application can wait

for a message to be received in message buffer 10 */

while(1)

{

/* Message was received. */

while (C1RXFUL1bits.RXFUL10 == 0);

C1RXFUL1bits.RXFUL10 = 0;

}

70353C Datasheet(PDF) 47 Page - Microchip Technology