Homelite HL-1050, HL-P2500, HL-1450 Graphic data input commands Command, @G+data length3bytes+data

10/10/03

3.2.7Graphic 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.

3.2.8Formfeed 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.

3.2.9Exit commands

Command

@X

Function

This command exits from HBP mode

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

APPENDIX C HBP MODE COMMANDS - 10