AVR Freaks

#include 
#include 


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//Typdefs/Enums~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#define START_OF_IDS 			72		//Byte number of TargetID and SelfID: 72 - 79 (8 total) -- zero indexed
#define IDS_START_OF_LINE		46		//Byte number of beginning of line containing ID numbers (not including start of record: ':')
#define MAX_LINE_LENGTH			30		//Really 22
#define NUM_BYTES_PER_LINE		20		//Not including : or 

#define MAX_PERSONALITY_SIZE	255		//EEPROM = 4096 bytes, we start at address 3840

int main(void) {
	FILE *recordFile, *eepFile;
	char fileLog[] = "fileRecord.txt";
	char eepFileName[] = "systemEEP_mlb - Copy.eep";
	uint8_t readResult, i, tempIDLower, tempIDUpper;
	char tempChar[3];
	char lastSecKey[20] = {0};	//16 + 1 (NULL)
	uint32_t lastSelfID = 0;
	uint32_t lastTargetID = 0;
	uint8_t preIDLineData[IDS_START_OF_LINE] = {0};
	uint8_t postIDLineData[MAX_PERSONALITY_SIZE] = {0};
	uint8_t postIDctr = 0;
	uint8_t lineData[MAX_LINE_LENGTH] = {0};
	uint16_t checksum = 0;
	uint8_t checksum8 = 0;
	int32_t nextByte;
	
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	//Begin section handling unique IDs~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	recordFile = fopen(fileLog, "r+");
	if(recordFile == NULL) {
		printf("\nFile did not exist.  Creating new one\n");
		recordFile = fopen(fileLog, "w");
		lastSelfID = 2;
		lastTargetID = 1;
		strcpy(lastSecKey, "123456789abcdefg");
	}
	else {
		do {
			readResult = fscanf(recordFile, "%d %d %s", &lastSelfID, &lastTargetID, lastSecKey);
		} while(readResult == 3);

		//Increment
		lastSelfID = lastSelfID + 2;
		lastTargetID = lastTargetID + 2;
		strcpy(lastSecKey, "123456789abcdefg");
	}
	
	fprintf(recordFile, "%d\t%d\t%s\n", lastSelfID, lastTargetID, lastSecKey);
	
	fclose(recordFile);

	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	//End section handling unique IDs~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	//Begin section updating system EEPROM File~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	//Update EEPROM file
	eepFile = fopen(eepFileName, "r");
	if(eepFile == NULL) {
		printf("\nEEPROM file does not exist.\n");
	}
	else {
		//Get data before the line w/ IDs
		for(i = 0; i < IDS_START_OF_LINE; i++) {
			preIDLineData[i] = fgetc(eepFile);
		}
		//Get line of data w/ IDs
		for(i = 0; i < NUM_BYTES_PER_LINE; i++) {
			tempChar[0] = fgetc(eepFile);
			tempChar[1] = fgetc(eepFile);
			tempChar[2] = 0;

			lineData[i] = (uint8_t)strtol(tempChar, NULL, 16);
		}

		//Get remainder of data
		//First: get rid of old checkum (two bytes)
		fgetc(eepFile);
		fgetc(eepFile);
		//Then get rest of data
		for(i = 0; i < MAX_PERSONALITY_SIZE; i++) {
			nextByte = fgetc(eepFile);
			if(nextByte == EOF) {
				postIDctr = i - 1;
				break;
			}
			else {
				postIDLineData[i] = (char)nextByte;
			}
		}

		//Insert new ID numbers
		tempIDLower = (uint8_t)(lastSelfID & 0xFF);
		tempIDUpper = (uint8_t)(lastSelfID >> 8);
		lineData[13] = tempIDLower;
		lineData[14] = tempIDUpper;
		tempIDLower = (uint8_t)(lastTargetID & 0xFF);
		tempIDUpper = (uint8_t)(lastTargetID >> 8);
		lineData[15] = tempIDLower;
		lineData[16] = tempIDUpper;


		//Calculate new checksum for line:
		for(i = 0; i < NUM_BYTES_PER_LINE; i++) {
			checksum = checksum + lineData[i];
		}
		checksum = ~checksum + 1;
		checksum8 = (uint8_t)(checksum & 0xFF);

		fclose(eepFile);		//Close (done reading)

		eepFile = fopen(eepFileName, "w");	//Open for writing (over-write everything)

		//Re-write the lead in data (before line containing IDs)
		for(i = 0; i < IDS_START_OF_LINE; i++) {
			fputc(preIDLineData[i], eepFile);
		}
		//Write out lines containing IDs)
		fprintf(eepFile, "%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",
		lineData[0], lineData[1], lineData[2], lineData[3], lineData[4], lineData[5], lineData[6],
		lineData[7], lineData[8], lineData[9], lineData[10], lineData[11], lineData[12], lineData[13],
		lineData[14], lineData[15], lineData[16], lineData[17], lineData[18], lineData[19]);
		fprintf(eepFile, "%02X", checksum8);

		fprintf(eepFile, "%s", postIDLineData);
		fclose(eepFile);

	}

	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	//End section updating system EEPROM File~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	return(0);
}