12.15.6 TI-TXT Hex Format (--ti_txt Option)

The TI-TXT hex format supports 8-bit hexadecimal data. It consists of section start addresses, data byte, and an end-of-file character. These restrictions apply:

• The number of sections is unlimited.
• Each hexadecimal start address must be even.
• Each line must have 8 data bytes, except the last line of a section.
• Data bytes are separated by a single space.
• The end-of-file termination tag q is mandatory.

Because the TI-TXT format (along with the binary format) supports only an 8-bit physical memory width and an 8-bit ROM width, the ROMS directive needs to have the origin and length specifications doubled when moving from a 16-bit format to an 8-bit format. If you receive a warning like the following, check the ROMS directive.

warning: section file.out(.data) at 07e000000h falls in unconfigured memory

For example, suppose the ROMS directive for a format that uses 16-bit ROM widths, such as ASCII-Hex with the --romwidth=16 option used, is as follows:

/* Memory counted as 16-bit words */ ROMS { FLASH: origin=0x3f000000, length=0x1000 }

You would double the address and length in the ROMS directive when using an 8-bit ROM width:

/* Memory counted as 8-bit bytes */ ROMS { FLASH: origin=0x7e000000, length=0x2000 }

The data record contains the following information: