Projectlab Elektronica-ICT KULeuven
Dependencies: EthernetInterface TMP102 TextLCD mbed-rtos mbed
Frame.cpp@0:ae3af7d18c4a, 2014-03-14 (annotated)
- Committer:
- seppeduwe
- Date:
- Fri Mar 14 19:41:14 2014 +0000
- Revision:
- 0:ae3af7d18c4a
- Child:
- 1:635e76c52151
Nog voor klasse
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
seppeduwe | 0:ae3af7d18c4a | 1 | #include "mbed.h" |
seppeduwe | 0:ae3af7d18c4a | 2 | #include "Frame.h" |
seppeduwe | 0:ae3af7d18c4a | 3 | #include "lib_crc.h" |
seppeduwe | 0:ae3af7d18c4a | 4 | //SOF LEN IDD TMP PWM ID0 ID1 … IDn CRC EOF |
seppeduwe | 0:ae3af7d18c4a | 5 | //SOF (16bit): start of frame (0xAA 0xBB) |
seppeduwe | 0:ae3af7d18c4a | 6 | //LEN (8bit): lengte van frame in bytes (volledige frame!) |
seppeduwe | 0:ae3af7d18c4a | 7 | //IDD (8bit): ID destinationmbed(1-15) |
seppeduwe | 0:ae3af7d18c4a | 8 | //TMP (16bit): 0b0000XXXX 0bXXXXXXXX Temperature(0 –4095) (-25°tot 85°) |
seppeduwe | 0:ae3af7d18c4a | 9 | //PWM (8bit): PWM dutycycle(0 –255) (0% –100%) |
seppeduwe | 0:ae3af7d18c4a | 10 | //TUN (8bit): Select tune & delay (1 –15) zie tabel 1 |
seppeduwe | 0:ae3af7d18c4a | 11 | //ID0–IDn(n x 8bit): lijst van reeds bezochte mbeds |
seppeduwe | 0:ae3af7d18c4a | 12 | //CRC (16bit): CRC16 checksum(x16+ x15+ x2+ 1) checksumop “LEN IDD TMP PWM ID0…IDn” |
seppeduwe | 0:ae3af7d18c4a | 13 | //EOF (16bit): end of frame (0xCC 0xDD) |
seppeduwe | 0:ae3af7d18c4a | 14 | |
seppeduwe | 0:ae3af7d18c4a | 15 | //char buf[]={0xAA,0xBB,0x0F,0x0B,0x0F,0xA0,0x02,0x05,0x08,0x09,0x0A,0xF2,0xE4,0xCC,0xDD}; //BB 0E A0 0F 32 02 05 08 09 F2 E4 CCDD"; |
seppeduwe | 0:ae3af7d18c4a | 16 | // SOF SOF LEN IDD TMP TMP PWM TUN ID0 ID1 ID2 CRC CRC EOF EOF |
seppeduwe | 0:ae3af7d18c4a | 17 | |
seppeduwe | 0:ae3af7d18c4a | 18 | void decode(char* frame) |
seppeduwe | 0:ae3af7d18c4a | 19 | { |
seppeduwe | 0:ae3af7d18c4a | 20 | int length; |
seppeduwe | 0:ae3af7d18c4a | 21 | int IdDestinationMbed; |
seppeduwe | 0:ae3af7d18c4a | 22 | int temperature; |
seppeduwe | 0:ae3af7d18c4a | 23 | int pWMDutycycle; |
seppeduwe | 0:ae3af7d18c4a | 24 | int tune; |
seppeduwe | 0:ae3af7d18c4a | 25 | char* IDs; |
seppeduwe | 0:ae3af7d18c4a | 26 | char* CRC; |
seppeduwe | 0:ae3af7d18c4a | 27 | int numberOfFrames; |
seppeduwe | 0:ae3af7d18c4a | 28 | |
seppeduwe | 0:ae3af7d18c4a | 29 | length = (int)frame[2]; |
seppeduwe | 0:ae3af7d18c4a | 30 | numberOfFrames = length- 12; |
seppeduwe | 0:ae3af7d18c4a | 31 | IDs = new char[numberOfFrames]; |
seppeduwe | 0:ae3af7d18c4a | 32 | |
seppeduwe | 0:ae3af7d18c4a | 33 | if ( frame[0]==0xAA && frame[1]==0xBB && frame[length-2]==0xCC && frame[length-1]==0xDD) { |
seppeduwe | 0:ae3af7d18c4a | 34 | |
seppeduwe | 0:ae3af7d18c4a | 35 | IdDestinationMbed = (int) frame[3]; |
seppeduwe | 0:ae3af7d18c4a | 36 | temperature = (int) ((frame[4]<<8) | frame[5]); |
seppeduwe | 0:ae3af7d18c4a | 37 | pWMDutycycle = (int)frame[6]; |
seppeduwe | 0:ae3af7d18c4a | 38 | tune = (int) frame [7]; |
seppeduwe | 0:ae3af7d18c4a | 39 | |
seppeduwe | 0:ae3af7d18c4a | 40 | for (int i=0; i<numberOfFrames; i++) { |
seppeduwe | 0:ae3af7d18c4a | 41 | IDs[i]=frame[i+numberOfFrames]; |
seppeduwe | 0:ae3af7d18c4a | 42 | } |
seppeduwe | 0:ae3af7d18c4a | 43 | printf("Decode length: %d IdDestinationMbed: %d temperature: %d \n\r",length,IdDestinationMbed,temperature); |
seppeduwe | 0:ae3af7d18c4a | 44 | printf("pWMDutycycle: %d tune: %d \n\r",pWMDutycycle,tune); |
seppeduwe | 0:ae3af7d18c4a | 45 | |
seppeduwe | 0:ae3af7d18c4a | 46 | } |
seppeduwe | 0:ae3af7d18c4a | 47 | } |
seppeduwe | 0:ae3af7d18c4a | 48 | |
seppeduwe | 0:ae3af7d18c4a | 49 | int encode( |
seppeduwe | 0:ae3af7d18c4a | 50 | int IdDestinationMbed, |
seppeduwe | 0:ae3af7d18c4a | 51 | int temperature, |
seppeduwe | 0:ae3af7d18c4a | 52 | int pWMDutycycle, |
seppeduwe | 0:ae3af7d18c4a | 53 | int tune, |
seppeduwe | 0:ae3af7d18c4a | 54 | int lengthIDs, |
seppeduwe | 0:ae3af7d18c4a | 55 | char* IDs, |
seppeduwe | 0:ae3af7d18c4a | 56 | char* encode |
seppeduwe | 0:ae3af7d18c4a | 57 | ) |
seppeduwe | 0:ae3af7d18c4a | 58 | { |
seppeduwe | 0:ae3af7d18c4a | 59 | int length = 12+lengthIDs; |
seppeduwe | 0:ae3af7d18c4a | 60 | //encode = new char[length]; |
seppeduwe | 0:ae3af7d18c4a | 61 | |
seppeduwe | 0:ae3af7d18c4a | 62 | encode[0]=0xAA; |
seppeduwe | 0:ae3af7d18c4a | 63 | encode[1]=0xBB; |
seppeduwe | 0:ae3af7d18c4a | 64 | |
seppeduwe | 0:ae3af7d18c4a | 65 | encode[2]= (char) length; |
seppeduwe | 0:ae3af7d18c4a | 66 | encode[3]= (char) IdDestinationMbed; |
seppeduwe | 0:ae3af7d18c4a | 67 | encode[4]= (char) (temperature>>8); |
seppeduwe | 0:ae3af7d18c4a | 68 | encode[5]= (char) temperature; |
seppeduwe | 0:ae3af7d18c4a | 69 | encode[6]= (char) pWMDutycycle; |
seppeduwe | 0:ae3af7d18c4a | 70 | encode[7]= (char) tune; |
seppeduwe | 0:ae3af7d18c4a | 71 | |
seppeduwe | 0:ae3af7d18c4a | 72 | for (int i=0; i<lengthIDs; i++) { |
seppeduwe | 0:ae3af7d18c4a | 73 | encode[8+i]=IDs[i]; |
seppeduwe | 0:ae3af7d18c4a | 74 | } |
seppeduwe | 0:ae3af7d18c4a | 75 | |
seppeduwe | 0:ae3af7d18c4a | 76 | //copy over static fields |
seppeduwe | 0:ae3af7d18c4a | 77 | /* for (int i=2; i<7; i++) { |
seppeduwe | 0:ae3af7d18c4a | 78 | CRC[i-2]= encode[i]; |
seppeduwe | 0:ae3af7d18c4a | 79 | }*/ |
seppeduwe | 0:ae3af7d18c4a | 80 | |
seppeduwe | 0:ae3af7d18c4a | 81 | |
seppeduwe | 0:ae3af7d18c4a | 82 | // Calculate CRC |
seppeduwe | 0:ae3af7d18c4a | 83 | int CRCint = MakeCRC(encode[2],encode[3],encode[4],encode[5],encode[6],IDs,lengthIDs); |
seppeduwe | 0:ae3af7d18c4a | 84 | |
seppeduwe | 0:ae3af7d18c4a | 85 | encode[length-4]= ( char)(CRCint>>8); |
seppeduwe | 0:ae3af7d18c4a | 86 | encode[length-3]=( char)(CRCint); |
seppeduwe | 0:ae3af7d18c4a | 87 | |
seppeduwe | 0:ae3af7d18c4a | 88 | encode[length-2]=0xCC; |
seppeduwe | 0:ae3af7d18c4a | 89 | encode[length-1]=0xDD; |
seppeduwe | 0:ae3af7d18c4a | 90 | return length; |
seppeduwe | 0:ae3af7d18c4a | 91 | } |
seppeduwe | 0:ae3af7d18c4a | 92 | |
seppeduwe | 0:ae3af7d18c4a | 93 | int MakeCRC( |
seppeduwe | 0:ae3af7d18c4a | 94 | char LEN, //lenght of frame |
seppeduwe | 0:ae3af7d18c4a | 95 | char IDD, //Destination ID |
seppeduwe | 0:ae3af7d18c4a | 96 | char TMP0,//first tmp char |
seppeduwe | 0:ae3af7d18c4a | 97 | char TMP1,//second tmp char |
seppeduwe | 0:ae3af7d18c4a | 98 | char PWM, //pwm tune |
seppeduwe | 0:ae3af7d18c4a | 99 | char* data, //data frame |
seppeduwe | 0:ae3af7d18c4a | 100 | int lenghtData //lenght of the data |
seppeduwe | 0:ae3af7d18c4a | 101 | ) |
seppeduwe | 0:ae3af7d18c4a | 102 | { |
seppeduwe | 0:ae3af7d18c4a | 103 | //char* crcData = new char[5+lenghtData] ; |
seppeduwe | 0:ae3af7d18c4a | 104 | char crcData[5+lenghtData] ; |
seppeduwe | 0:ae3af7d18c4a | 105 | |
seppeduwe | 0:ae3af7d18c4a | 106 | crcData[0] = LEN; //lenght of frame |
seppeduwe | 0:ae3af7d18c4a | 107 | crcData[1] = IDD; //Destination ID |
seppeduwe | 0:ae3af7d18c4a | 108 | crcData[2] = TMP0;//first tmp char |
seppeduwe | 0:ae3af7d18c4a | 109 | crcData[3] = TMP1;//second tmp char |
seppeduwe | 0:ae3af7d18c4a | 110 | crcData[4] = PWM; //pwm tune |
seppeduwe | 0:ae3af7d18c4a | 111 | |
seppeduwe | 0:ae3af7d18c4a | 112 | // add the data to the crcData |
seppeduwe | 0:ae3af7d18c4a | 113 | for (int i=0; i<lenghtData; i++) { |
seppeduwe | 0:ae3af7d18c4a | 114 | crcData[i+5]= data[i]; |
seppeduwe | 0:ae3af7d18c4a | 115 | } |
seppeduwe | 0:ae3af7d18c4a | 116 | return calculate_crc16(crcData, lenghtData+5); |
seppeduwe | 0:ae3af7d18c4a | 117 | } |