Figure 5-1 illustrates error generation with the GPIO/CCS method.

• The type of error that can be generated is listed in the #define headers of the CCS project.
• To generate a specific error, update the function call generateCANFrame() with the error type. By default, NO_ERR is the first argument to the function call, meaning no errors will be generated. The last two arguments of the function generateCANFrame() are BITNERR (bit position) and DATABYTENUM (byte number) respectively. The ‘bit position’ is used for MSGID_ERR, DATA_ERR and CRC_ERR. The ‘byte number’ is only used with DATA_ERR.
• Meaning of the error definitions:
  • FF_SRS_ERR – SRS bit is flipped
  • FF_IDE_ERR – IDE bit is flipped
  • FF_RTR_ERR – RTR bit is flipped
  • FF_R1_ERR – Reserved bit ‘r1’ is flipped
  • FF_R0_ERR – Reserved bit ‘r0’ is flipped
  • MSGID_ERR – ‘bit position’ in MSGID is flipped
  • DATA_ERR – ‘bit position’ in data field pointed to by ‘byte number’ is flipped
  • CRC_ERR – ‘bit position’ in CRC field is flipped
  • STUFF_BITS_ERR – the function will not generate stuff bits when 5 consecutive bits of the same state occurs.

Figure 5-1 Error Generation With GPIO/CCS Method