Brother International HL-L8350CDW Command Reference Guide for Software Develop - Page 532
Appendix C Hbp Mode Commands - 10
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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' 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 APPENDIX C HBP MODE COMMANDS - 10