Command ; Function ; Graphic data input commands - Page 422

2001/10/02 

APPENDIX C HBP MODE COMMANDS - 10

3.2.7 

Graphic data input commands 

Command 

@G+[data length(3bytes)]+data 

Function 

The 3 bytes of data following the @G command shows the length of the data, N.  The N bytes following this 3 
byte header is handled as graphic data. 

(Example) 

fprintf(fp,”@G%c%c%c”, 

(char)((data_length>>16)&0xff), 

(char)((data_length>>8)&0xff), 

(char)((data_length>>0)&0xff)   ); 

fwrite(data,(size_t)1,(size_t)data_length,fp); 

See section 2.3 for further details of the data format. 

The printer driver can send the printer 1 page of print data divided into sections by sending these commands 
continuously.  It is recommended to send 1 page of print data without dividing into sections when the 1 page 
print data is more than the printer memory (500 Kbytes) as the printer will print this ' on the fly' and sending it in 
one block will improve the print performance. 

3.2.8 

Formfeed commands 

Command 

@F 

Remark: The last raster scan on each page should be a white raster.  For instance, the white raster command 
‘@G<00H><00H><01H><FFH>‘ should be sent before the @F command. 

Function 

This command sets a page break. 

The printer works as follows when it receives this command; 

(1)  If 1 page of print data is less than the input buffer size in the printer, the printer recognizes the command 

as a page break and starts printing. 

(2)  If 1 page of print data is more than the input buffer size in the printer, then since the printer has already 

started printing, this command is handled as a page break only. 

When it is received after printing, a Print Overrun error occurs in the printer.  If Bit0 is set to 1 in the mode 
setting command (@M+*) mentioned in section 2.2.5., the printer ignores the data until it receives this 
form feed command when a Print Overrun error occurs.  

3.2.9 

Exit commands 

Command 

@X 

Function 

This command exits from HBP mode 

The HL-1040 printer is restored to the default emulation mode by this command