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canFdGetConfiguration, canFdSetConfiguration

Valid for: CANoe DE • CANoe:lite DE

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Function Syntax

long canFdSetConfiguration(long channel, canSettings abrSettings, canSettings dbrSettings);
long canFdGetConfiguration(long channel, canSettings abrSettings, canSettings dbrSettings);

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Description

The CAN controller parameters for arbitration and data phase can be set or read. canFdSetConfiguration performs an automatic reset of the CAN controller.

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Parameters

  • Channel: The CAN channel.
  • struct canSettings:
    • float baudrate: in bit/s
    • unsigned char tseg1, tseg2: length of the time segments 1 and 2 in time quanta
    • unsigned char sjw: sync jump width in time quanta
    • unsigned char sam: number of sampling points (1 or 3). Only valid for CAN. For CAN FD “sam” is hard coded to 1.
    • unsigned int flags: see description below

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Flags for canFdGetConfiguration:

  • Bit Position 0, 1:
    • 0: unknown transceiver
    • 1: Low speed
    • 2: Single wire
    • 3: High speed
  • Bit Position 8:
    • 0x100: The channel is configured for CAN FD
  • All others: Reserved

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Flags for canFdSetConfiguration:

  • Bit Position 0:
    • 0: normal mode
    • 1: silent mode (acknowledge not created)
  • All others: Reserved, and must be 0.

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Return Values

  • 1: success
  • 0: error

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Example

int ret;
int channel = 1;
CANsettings abrSettings;

CANsettings dbrSettings;

abrSettings.baudrate = 1000000;
abrSettings.tseg1=5;
abrSettings.tseg2=2;
abrSettings.sjw=2;
abrSettings.sam=1;
abrSettings.flags = 0;

dbrSettings.baudrate = 4000000;
dbrSettings.tseg1=6;
dbrSettings.tseg2=3;
dbrSettings.sjw=2;
dbrSettings.sam=1;
dbrSettings.flags = 0;

write("Set 1 MB");
ret = canFdSetConfiguration(channel, abrSettings, dbrSettings);

if (ret)
{
    write("Arbitration settings: baud= %f, tseg1 = %d, tseg2= %d, sjw = %d, sam = %d, flags = 0x%x", abrSettings.baudrate, abrSettings.tseg1, abrSettings.tseg2, abrSettings.sjw, abrSettings.sam, abrSettings.flags);
    write("Data settings: baud= %f, tseg1 = %d, tseg2= %d, sjw = %d, sam = %d, flags = 0x%x", dbrSettings.baudrate, dbrSettings.tseg1, dbrSettings.tseg2, dbrSettings.sjw, dbrSettings.sam, dbrSettings.flags);
}