Thermo Scientific Heracell Vios 160i CR, Operating Instructions Manual

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12
Data Communication
Examples of Data Logger Codes
12-16
Heracell Vios 160i / 250i CR
Thermo Scientific
Functions for Data Logger Queries
The following code example for reading the data logger uses six functions:
• ahex

// converts the received ASCII character into a hexadecimal number,
• send_telegramm

// sends a query to the data logger,
• get_telegramm

// receives a response data the data logger,
• time_2_str

// uses a hexadecimal value to create ASCII characters in time format,
• num_2_string

// uses hexadecimal values to create ASCII characters to be entered into a file,
• read_datalogger

// edits the received data and writes them into a file.
Example of a Code for a a Data Logger Query
char ahex (char a)
char ahex(char a)

{

char i;

char hexa[16]=“0123456789abcdef“;
for (i = 0; i < 16; i++)

if (a == hexa[i])

return (i);

return 0;

}
send_telegramm
void send_telegramm(char *p)

{

char string [15];

unsigned char bcc = 0xFF;

char i;
// copy telegram together

strncpy (&string[0], „?:xxxx:00::00\r“, 14);

// insert 4-digit address

strncpy (&string[2], p, 4);

// calculate checksum: inverted XOR of all bytes

// without checksum and <CR>

for (i = 0; i < 11; i ++)

bcc = (bcc^string[i]);

// copy checksum

string[11] = hexa(bcc/16);

string[12] = hexa(bcc%16);
