Nexa får intensivvård

[Palle500]

Tror jag har löst checksumman.
Det är CRC8 byte, normal med initial värde 0x31
http://miscel.dk/MiscEl/CRCcalculations.html#CRC8
Stämmer på mina testvärde. OBS! var ett fel i föregående dump.
Följande stämmer det för och man skall utesluta första FF bytet (är logiskt) och det sista är CRC8:

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// Correct checksum! Works on Jenkinsbird Adr 0xDD
//const char FineOffsData[TX_SIZE] = {0xFF,0x4D,0xD2,0x10,0xFF,0xA4};  // Adr 0xDD 221 +52,8
//const char FineOffsData[TX_SIZE] = {0xFF,0x4D,0xD2,0x08,0xFF,0xFD};  // Adr 0xDD 221 +52,0
//const char FineOffsData[TX_SIZE] = {0xFF,0x4D,0xD8,0x2B,0xFF,0xD2};  // Adr 0xDD 221 -4,3
// Correct checksum! Works on Jenkinsbird Adr 0x62
//const char FineOffsData[TX_SIZE] = {0xFF,0x46,0x21,0xE1,0xFF,0xF8};  // Adr 0x62 98  +48,1
//const char FineOffsData[TX_SIZE] = {0xFF,0x46,0x21,0xBF,0xFF,0x72};  // Adr 0x62 98  +44,7
//const char FineOffsData[TX_SIZE] = {0xFF,0x46,0x20,0x0A,0xFF,0xD2};  // Adr 0x62 98  +01,0
//const char FineOffsData[TX_SIZE] = {0xFF,0x46,0x29,0x05,0xFF,0x5F};  // Adr 0x62 98  -26,1
//const char FineOffsData[TX_SIZE] = {0xFF,0x46,0x29,0x40,0xFF,0xA1};  // Adr 0x62 98  -32,0
//const char FineOffsData[TX_SIZE] = {0xFF,0x46,0x21,0x1E,0xFF,0x79};  // Adr 0x62 98  +28,6

Stormen har tagit strömen hos mig så UPS:erna går ned snart. Adjö!

[Palle500]

Här är CRC8 tabellen för fineoffset CRC8 beräkning:

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// CRC array for FineOffset CRC8 initialized with polynom 0x31
// unsigned short MyByteArray[4]={0x46,0x21,0x1E,0xFF};
// CRC=0; for(i=0; i < sizeof(MyByteArray); i++) CRC=CrcTable[MyByteArray[i]^CRC]; 
// Gives CRC=0x79
const unsigned short CrcTable[256] = {
0x00, 0x31, 0x62, 0x53, 0xc4, 0xf5, 0xa6, 0x97,0xb9, 0x88, 0xdb, 0xea, 0x7d, 0x4c, 0x1f, 0x2e,
0x43, 0x72, 0x21, 0x10, 0x87, 0xb6, 0xe5, 0xd4,0xfa, 0xcb, 0x98, 0xa9, 0x3e, 0x0f, 0x5c, 0x6d,
0x86, 0xb7, 0xe4, 0xd5, 0x42, 0x73, 0x20, 0x11,0x3f, 0x0e, 0x5d, 0x6c, 0xfb, 0xca, 0x99, 0xa8,
0xc5, 0xf4, 0xa7, 0x96, 0x01, 0x30, 0x63, 0x52,0x7c, 0x4d, 0x1e, 0x2f, 0xb8, 0x89, 0xda, 0xeb,
0x3d, 0x0c, 0x5f, 0x6e, 0xf9, 0xc8, 0x9b, 0xaa,0x84, 0xb5, 0xe6, 0xd7, 0x40, 0x71, 0x22, 0x13,
0x7e, 0x4f, 0x1c, 0x2d, 0xba, 0x8b, 0xd8, 0xe9,0xc7, 0xf6, 0xa5, 0x94, 0x03, 0x32, 0x61, 0x50,
0xbb, 0x8a, 0xd9, 0xe8, 0x7f, 0x4e, 0x1d, 0x2c,0x02, 0x33, 0x60, 0x51, 0xc6, 0xf7, 0xa4, 0x95,
0xf8, 0xc9, 0x9a, 0xab, 0x3c, 0x0d, 0x5e, 0x6f,0x41, 0x70, 0x23, 0x12, 0x85, 0xb4, 0xe7, 0xd6,
0x7a, 0x4b, 0x18, 0x29, 0xbe, 0x8f, 0xdc, 0xed,0xc3, 0xf2, 0xa1, 0x90, 0x07, 0x36, 0x65, 0x54,
0x39, 0x08, 0x5b, 0x6a, 0xfd, 0xcc, 0x9f, 0xae,0x80, 0xb1, 0xe2, 0xd3, 0x44, 0x75, 0x26, 0x17,
0xfc, 0xcd, 0x9e, 0xaf, 0x38, 0x09, 0x5a, 0x6b,0x45, 0x74, 0x27, 0x16, 0x81, 0xb0, 0xe3, 0xd2,
0xbf, 0x8e, 0xdd, 0xec, 0x7b, 0x4a, 0x19, 0x28,0x06, 0x37, 0x64, 0x55, 0xc2, 0xf3, 0xa0, 0x91,
0x47, 0x76, 0x25, 0x14, 0x83, 0xb2, 0xe1, 0xd0,0xfe, 0xcf, 0x9c, 0xad, 0x3a, 0x0b, 0x58, 0x69,
0x04, 0x35, 0x66, 0x57, 0xc0, 0xf1, 0xa2, 0x93,0xbd, 0x8c, 0xdf, 0xee, 0x79, 0x48, 0x1b, 0x2a,
0xc1, 0xf0, 0xa3, 0x92, 0x05, 0x34, 0x67, 0x56,0x78, 0x49, 0x1a, 0x2b, 0xbc, 0x8d, 0xde, 0xef,
0x82, 0xb3, 0xe0, 0xd1, 0x46, 0x77, 0x24, 0x15,0x3b, 0x0a, 0x59, 0x68, 0xff, 0xce, 0x9d, 0xac,
};