Downloading Procedures - Motorola M68HC11EVBU User Manual

4.8

DOWNLOADING PROCEDURES

This portion of text describes the EVBU downloading procedures. Downloading operations
allow Motorola's S-record files to be transferred from a personal computer to the EVBU or to be
verified against data in EVBU memory. S-record files are made up of data and checksum values
in a special format which facilitates downloading. Appendix A describes the S-record format in
detail.
In a normally configured EVBU, all data transfers including monitor communications and
download data utilize the terminal I/O port connector P1. Since there are no separate host
communication ports available on the EVBU, only the LOAD <T> and VERIFY <T> variations
of the load and verify commands are applicable.
The setup for downloading includes a personal computer (e.g., IBM-PC or Macintosh), a serial
interface cable to connect the personal computer to the EVBU connector P2, and the EVBU with
an applicable power source. A software terminal emulator program is also required. Some typical
terminal emulator programs for the IBM-PC include PROCOMM and KERMIT. Typical
terminal emulator programs for the Macintosh include MacTerminal and Red Ryder.
S-record programs for downloading are created by assembling programs on the personal
computer (PC). The steps needed to develop a program are described briefly as follows:
1. Assembly language program is entered into a text file on the PC. A text editor is used
to create this text file which is called a source program.
2. An assembler program operating on the PC is used to translate the source program
into an S-record object file and/or listing file. Buf32.asm file on the EVBU diskette is
an example of a large listing.
3. After the creation of the S-record files, the files are downloaded to the EVBU as
shown in the following step-by-step procedures.
M68HC11EVBU/D
OPERATING INSTRUCTIONS
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