topic LPC824 CRC8 in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/LPC824-CRC8/m-p/654835#M26029 <HTML><HEAD></HEAD><BODY><P>hello</P><P>planning to use CRC values to check messages sent between devices on a rs485 network(between master and slaves).</P><P>master device will send a message consisting of a number of bytes to a slave, one of the bytes will be a CRC value calculated for that message.&nbsp; slave then calculates a CRC value of the message and compares it with the message's CRC value.</P><P>my question is: how is the LPC824 CRC8 function calculated?</P><P>i found a few CRC function source codes (one using arrays) and it seems the outputs are different.&nbsp; a LPC824 will be used as a slave, its CRC calculation may not match the master's calculated CRC value.</P><P>is there source code for the CRC8 function available to review?</P><P>i could just compile a CRC function with the LPC824, but prefer is use the built-in function, it would save some space in flash.</P><P>regards</P><P>enzo</P></BODY></HTML> Sun, 13 Nov 2016 16:44:05 GMT enzoguerra 2016-11-13T16:44:05Z LPC824 CRC8 https://community.nxp.com/t5/LPC-Microcontrollers/LPC824-CRC8/m-p/654835#M26029 <HTML><HEAD></HEAD><BODY><P>hello</P><P>planning to use CRC values to check messages sent between devices on a rs485 network(between master and slaves).</P><P>master device will send a message consisting of a number of bytes to a slave, one of the bytes will be a CRC value calculated for that message.&nbsp; slave then calculates a CRC value of the message and compares it with the message's CRC value.</P><P>my question is: how is the LPC824 CRC8 function calculated?</P><P>i found a few CRC function source codes (one using arrays) and it seems the outputs are different.&nbsp; a LPC824 will be used as a slave, its CRC calculation may not match the master's calculated CRC value.</P><P>is there source code for the CRC8 function available to review?</P><P>i could just compile a CRC function with the LPC824, but prefer is use the built-in function, it would save some space in flash.</P><P>regards</P><P>enzo</P></BODY></HTML> Sun, 13 Nov 2016 16:44:05 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC824-CRC8/m-p/654835#M26029 enzoguerra 2016-11-13T16:44:05Z