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- Prerequisites:
- The users of OpenOCD as well as computer programs interacting with OpenOCD are expecting that certain commands
- do the same thing across all the targets.
- Rules to follow when writing scripts:
- 1. The configuration script should be defined such as , for example, the following sequences are working:
- reset
- flash info <bank>
- and
- reset
- flash erase_address <start> <len>
- and
- reset init
- load
- In most cases this can be accomplished by specifying the default startup mode as reset_init (target command
- in the configuration file).
- 2. If the target is correctly configured, flash must be writable without any other helper commands. It is
- assumed that all write-protect mechanisms should be disabled.
- 3. The configuration scripts should be defined such as the binary that was written to flash verifies
- (turn off remapping, checksums, etc...)
- flash write_image [file] <parameters>
- verify_image [file] <parameters>
- 4. adapter speed sets the maximum speed (or alternatively RCLK). If invoked
- multiple times only the last setting is used.
- interface/xxx.cfg files are always executed *before* target/xxx.cfg
- files, so any adapter speed in interface/xxx.cfg will be overridden by
- target/xxx.cfg. adapter speed in interface/xxx.cfg would then, effectively,
- set the default JTAG speed.
- Note that a target/xxx.cfg file can invoke another target/yyy.cfg file,
- so one can create target subtype configurations where e.g. only
- amount of DRAM, oscillator speeds differ and having a single
- config file for the default/common settings.
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