Freescale Semiconductor 56800E User manual

56800E
freescale.com
16-Bit Digital Signal Controllers
56800E
Flash Programmer User Guide
56800EFPUG
Rev. 0
09/2005

56800E Flash Programmer User Guide, Rev. 0
2Freescale Semiconductor
Document Revision History
Version History Description of Change
Rev 0 Initial release

56800E Flash Programmer User Guide, Rev. 0
Freescale Semiconductor 3
56800E Flash Programmer User Guide
The 56800E Flash Programmer provides a means to program the on-chip Flash of the 56800E DSC family.
The Flash Memory blocks are programmed in circuit, using the JTAG/EOnCE interface. The 56800E
Flash Programmer is suitable for both a low volume production environment as well as for in-field
firmware upgrades.
The 56800E Flash Programmer runs under a 32-bit Windows environment on PC compatible computers.
A Parallel Command Converter or CodeWarrior USB TAP is needed to provide the interface between the
JTAG/OnCE interface of the target system and the computer. The connection is outlined in the figure
below.
Figure 1 Connecting the Target System to the PC via Parallel Command Connector
Figure 2 Connecting the Target System to the PC via USB Tap
The 56800E Flash Programmer is provided in two forms. The first is command-line oriented to allow easy
integration with scripts. The second is a GUI running under windows to allow easy rapid Flash loading
onto the target device. The command line version is backwards compatible with the old Flash over JTAG
tool.
Cable
PC-Compatible
Computer
JTAG
Power
Parallel
Command
Converter
Target
System
Parallel Extention
PC-Compatible
Computer
JTAG
Power
Target
System
USB Cable
USB TAP

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1. Corrections to CodeWarrior v7.2 Configuration Files
The configuration files in CodeWarrior v7.2 may need to be modified depending on the device or devices
to be programmed. These files will be corrected in CodeWarrior v7.3. They are typically found in the
following location:
C:\Program Files\Metrowerks\CodeWarrior\M56800E Support\initialization
For the 56F801x devices, change the following line in the file 56801x_flash.cfg
set_hfm_programmer_base 0x8746 # shared p-ram
to
set_hfm_programmer_base 0x8700 # shared p-ram
For the 56F835x device, change the following line in the file 56835x_flash.cfg
set_hfm_config_base 0x00FFF7
to
set_hfm_config_base 0x01FFF7
The first correction is required for the 56F8013 and 56F8014; programming will fail if the modification is
not applied. The second correction for the 56F8355, 56F8356, and 56F8357 is only required if it is desired
to use the lock flash after programming feature.
2. 56800E Flash Programmer Description
The 56800E Flash Programmer runs under 32-bit Windows operating systems.
Before loading to the actual device, the 56800E Flash Programmer will first create a Virtual Device Image
on the Host PC. The Virtual Device Image contains all of the memory to be programmed on the device
allowing for all of the S-Record, or executable and linking format (ELF) files, to be loaded and verified
before any programming begins. Additionally, the 56800E Flash Programmer allows certain operations to
be performed on the Virtual Device Image as if it was a real device; however, this feature is only supported
in the Command-Line version.
2.1 Command-Line Version
The command line version executes in a DOS window and accepts command line parameters to control its
operation. The command line interface is very effective when the 56800E Flash Programmer needs to be
integrated into scripts or executed by other programs controlling the manufacturing process. All the
mandatory parameters are indicated by ‘<>’ brackets and optional parameters are indicated by ‘[]’
brackets. The syntax has the following two variants:

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1. fflash <flash config file> <S-Record/ELF file 1> [S-Record/ELF file 2] [.] [S-Record/ ELF file N]
[options]
2. fflash <flash config file> [options]
Certain operations, such as recovery, are performed when no S-Record or ELF file is provided.
The configuration files can be typically found in the following directory on the PC:
C:\Program Files\Metrowerks\CodeWarrior\M56800E Support\initialization
2.1.1 Options
Position of options on the command line is not fixed. They can be specified before, between, or after the
configuration and the list of S-Record ,or ELF files to be loaded.
All options with the text Legacy Support, indicate they remain to support the old Flash over JTAG
application. These options are deprecated. They indicate what options should be used instead.
2.1.1.1 –crc
Performs a 32-bit cyclical redundancy check (CRC) from a start address to an end address, and reports the
32-bit CRC to the user. This can be used in conjunction with the –dumpvirtual to dump the 32-bit CRC of
a file without loading it onto the device.
Example: fflash flash.cfg my_appl.S –crcP0x0-0x1fff
2.1.1.2 –d
By default, the tool resets the target after programming is concluded and program execution will occur.
This option forces the tool to leave the target in Debug mode, i.e. the downloaded code is not executed
immediately after programming.
Example: fflash flash.cfg my_appl.S –d
2.1.1.3 –dumpvirtual
When used in conjunction with the –r/–v/–crc switch’s parameters, the contents of the virtual device on
the computer will be dumped to a S-Record, or ELF file, instead of reading the contents off of the actual
Digital Signal Controller (DSC) device.
Example: fflash flash.cfg my_appl.S –dumpvirtual –vP0x0:0x1fff
2.1.1.4 –erase=<all|unit|page>
This parameter tells the programmer how the device should be erased by any one of three modes before
any programming occurs:

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1. When the mode is set to all, the entire device is erased before any programming occurs; however, the mode
does not perform a recovery and can still fail if the Flash is secured. In this case, use the –recover option.
2. When the mode is set to unit, only the specific unit requiring programming will be erased. A unit is defined
by the add_hfm_unit token in the Flash configuration file and is generally referring to Boot, Program, or
Data Flash blocks.
3. When the mode is set to page, only the specific page of Flash requiring programming will be erased.
Using the unit or page mode is useful when wishing to preserve information currently stored in either a
particular Flash block or page. By default this parameter is unit.
Example: fflash flash.cfg my_appl.S –erase=page
2.1.1.5 –fastport
Legacy Support
This option is no longer supported. The previous version of the Flash over JTAG tool would attempt to
communicate with the Parallel Command Converter as quickly as the LPT port would allow. Some LPT
ports would operate too fast for the DSC to remain aligned, therefore this option was provided. This is no
longer required because the JTAG clock speed can now be set more specifically through the –jtagclk=X
option.
2.1.1.6 –jtagclk=<x>
This option tells the CCS server the frequency (kHz) at which to run the JTAG interface. The default value
is 800kHz. Faster clock speeds allow for faster programming, but if the clock is set too fast, the DSC chip
may not be able to process incoming data quickly enough, eventually leading to a programming failure.
Example: fflash flash.cfg my_appl.S –jtagclk=1000
2.1.1.7 –l<log file>
This option forces all messages shown on the screen to be written into the Log File. If the file already
exists, it will be overwritten.
Example: fflash flash.cfg my_appl.S –lmylog.txt
2.1.1.8 –lock
This option will lock the device by enabling Flash security. This option writes 0xE70A to the
SECLO_VALUE location in the Flash Security Configuration table of Program Flash. If an S-Record or,
ELF file is provided, this location is written to after the S-Record, or ELF file is loaded. This option can
also be used in combination with the –recover option, allowing the program to recover from the locked
state, load the S-Record, then proceed to relock the device, allowing an upgrade of a LOCKED device. The
56800E Flash Programmer verifies the SECLO_VALUE location is 0xFFFF before the location is written
to. If the location is not 0xFFFF the programming of this location cannot proceed and an error is received.
Please note this only enables Flash Security. Any advanced options, such as back door enable and the back
door key will require a loadable S-Record, or ELF file defining this data.
Example: fflash flash.cfg my_appl.S –lock

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2.1.1.9 –LPT<X>
By default, the 56800E Flash Programmer uses the current configured device on the CCS server. How-
ever, the default can be overridden by the –USB or –LPTX switches. The LPT switch will configures the
CCS server for the Parallel Command Converter. Additionally, this change will be permanent to CCS,
and may need to be changed before other applications use the CCS server. When connecting to a remote
CCS server using the –remote switch, the remote server will be configured to use this LPT port.
Example: fflash flash.cfg my_appl.S .LPT1
2.1.1.10 –p<PORT>
Legacy Support
This option is used to specify which LPT port to use when connecting to a Parallel Command Converter.
When this option is specified, along with the –remote option, it connects to the specified LPT port on that
remote device. Because this command is deprecated, it only supports the addresses listed in Table 2-1. No
other address will be supported. The option –LPTX should be used in place of this deprecated option.
Example: fflash flash.cfg my_appl.s –p0x378

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2.1.1.11 –page
Legacy Support
This option specifies a Page Erase mode should be used instead of the Mass Erase mode. This parameter
is useful for in-field upgrades where parameters stored in on-chip Flash must be preserved. In this case,
only pages containing addresses referenced by the S-Record file will be erased. As this option is
deprecated, the –erase=X option should be used instead. This option is identical to –erase=page.
Example: fflash flash.cfg my_appl.s –page
2.1.1.12 –r<mem><start>:<end>
This option causes the contents of the DSC memory to be dumped to the specified S-Record file. If the
output file already exists, it is overwritten.’<mem>’ specifies whether Data (‘X’) or Program (‘P’) memory
should be dumped. Addresses, ‘<start>’ and ‘<end>’, are expressed in hexadecimal.
Examples: fflash flash.cfg readout_x.S –rX0x0:0xfff
fflash flash.cfg readout_p.S –rP0x0:0xfff
2.1.1.13 –recover
This option disables Flash Security by erasing ALL on-chip Flash units of the DSC. Please note the
contents of ALL on-chip Flash units are lost and cannot be recovered after performing this algorithm.
When the recover switch is provided in combination with a S-Record, or ELF file, the program will first
recover the Flash before programming the new S-Record, or ELF file onto the Flash.
Example: fflash flash.cfg –recover
fflash flash.cfg my_appl.S –recover
2.1.1.14 –remote=Address[:port]
By default, the 56800E Flash Programmer connects to the local computer’s CCS server and attempts to
use it to program the DSC device. However, it is possible to program a device connected to a remote
computer’s CCS server. When the remote option is specified, the address of the remote CCS server is
required; nonetheless, the port is optional. The default value of the port is 41475. Changing the port value
is useful when the CCS server is behind a firewall. Contact your network administrator for more
information about which ports are open.
NOTE: The IP address of the local computer is 127.0.0.1.
Examples:
Table 2-1 Typical Addresses Assigned to
LPT Ports on IBM-PC Machines
LPT# Base Address
LPT1 0x378
LPT2 0x278
LPT3 0x3BC

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Connects to the local computer, at port 1000
fflash flash.cfg my_appl.S –remote=127.0.0.1:1000
Connects to the remote CCS server at IP address 1.2.3.4
fflash flash.cfg my_appl.S–remote=1.2.3.4
Connects to the remote CCS server named BOB
fflash flash.cfg my_appl.S –remote=BOB
Connects to the remote CCS server at IP address 1.2.3.4 at port 1000
fflash flash.cfg my_appl.S –remote=1.2.3.4:1000
2.1.1.15 –s
This option enables Silent mode. Normally the 56800E Flash Programmer reports an error for each word
of data, or code, found in the specified S-Record not fitting into any of the address ranges of the Flash
blocks defined in the Flash configuration file. When Silent mode is enabled, the 56800E Flash Programmer
only reports some data was ignored, but it does not print any further details.
Example: fflash flash.cfg my_appl.S –s
2.1.1.16 –t<S-record file>
Legacy Support
This option has the same behavior as simply specifying additional S-Records, or ELF files, on the
command line; however, using the –t guarantees it will be the last S-Record, or ELF file, loaded in the
chain.
Example: fflash flash.cfg my_app.S –tserial.S
2.1.1.17 –timeout=<x>
This option determines the wait length in seconds for the CCS server to respond before it will abort and
return an error. The default value is 5 seconds.
Example: fflash flash.cfg my_appl.S –timeout=10
2.1.1.18 –USB
By default, the 56800E Flash Programmer uses the current configured device on the CCS server. However,
the default can be overridden by the –USB or –LPTX switches. The USB switch configures the CCS server
for the CodeWarrior USB TAP device. Additionally, this change is permanent to CCS, and may need to
be changed before other applications use the CCS server. When connecting to a remote CCS server using
the –remote switch, the remote server will be configured to use the USB port.
Example: fflash flash.cfg my_appl.S –USB
2.1.1.19 –v<mem><start>:<end>
This option allows the user to view the DSC memory by dumping the contents of thememory to the screen.
‘<mem>’ specifies whether Data (‘X’) or Program (‘P’) memory should be dumped. Addresses, ‘<start>’
and ‘<end>’, are expressed in hexadecimal.

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Examples: fflash flash.cfg –vX0x0:0x1000
fflash flash.cfg –vP0x0:0x1000
2.1.1.20 –verify
This option does not load the data onto the device. A 32-bit CRC check is used to compare the Flash
contents of the device to the specified files with a PASS or FAIL result of this comparison. The 32-bit CRC
will also be displayed when the erase mode is set to unit or all for each unit being verified. The first failing
unit or page will cause the 56800E Flash Programmer to stop performing the verification routine.
Example: fflash flash.cfg my_appl.S –verify
2.1.1.21 –verifyprog
This option only verifies words actually programmed and not the entire unit/page, and depending on the
setting of the -erase=X option.
Example: fflash flash.cfg my_appl.S –verifyprog
2.1.1.22 –w
This option forces the 56800E Flash Programmer to wait until the DSC comes out of a Reset state. This
option is useful in situations where there is external circuitry on the proprietary target hardware,
prolonging the duration of a Reset. This option is also useful when the DSC is powered down. It is
necessary to make sure it will be programmed as soon as the target hardware is powered up.
Example: fflash flash.cfg my_appl.S –w
2.1.2 Operation
The 56800E Flash Programmer outputs progress and status messages to standard output. Where the
56800E Flash Programmer is called from a script, or another program, the output messages can be
redirected to a file for later inspection by the operator. For easy integration into scripts, the final status of
the programming operation is also provided through an error level. Please see Section 2.1.4 for details.
When the amount of code and data in the S-Record file is large, programming and verification may take
longer. Typical error-free output of the 56800E Flash Programmer is illustrated in Figure 2-1.

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Figure 2-1 Application Messages Sample
2.1.3 Error Messages
The 56800E Flash Programmer generates error messages in various situations. Those error messages are:
• S–record file corruption:
— No ‘S’ character at the start of the line
— ‘S’ character was not followed by a digit
— Odd number of nibbles
— Character is not hexadecimal
— Invalid Checksum in line
— Characters in line does not match character count in line
— Some data ignored, details not reported (silent mode)
— Data @ <address> ignored
• Target chip related:
— The device is not powered up and cannot continue if the device is powered up. Attempt a hard
reset on the device and try this action again.
— Error: The device is in secure mode, and cannot proceed.
— Error: Could not write to PRAM. This usually means the wrong configuration file was used.
— Flash unit # (<address>). Erased, but still was not blank.
— Flash unit #, page # (<address>). Erased, but still was not blank.
— Flash unit # (<address>). Verification Failed CRC32 (<CRC32>expected (<CRC32>).
— Flash unit #, page # (<address>). Verification Failed CRC32(<CRC32>) expected (<CRC32>).
56800E Flash Programmer v1.0
Program ran on: Mon Aug 08 14:09:04 2005
Connected to local CCS server
Configured to the default device
Using Configuration File: C:\Program Files\Metrowerks\CodeWarrior\M56800E
Support\initialization\56801x_flash.cfg
1 flash unit(s) defined in the config file.
Chip ID: 0x01f2401d
Core ID: 0x02211004, 1 - Normal Mode
Placing the device into debug mode, please wait...
Reading File..\AliasingLab\output\sdm_pROM_xRAM.elf.s...
S-record ID: PROGRAM&DATA
Flash unit #0 (P:0x000000-0x001FFF) Erased, and Checked Blank
Flash unit #0 (P:0x000000-0x001FFF) programmed, 2689 words written
Flash unit #0 (P:0x000000-0x001FFF) Verification Passed CRC32 (0x68dd1651)
Resetting the device to user mode...
Init: 594ms, Erase: 235ms, Program: 718ms, Verify: 860ms, Exit Debug: 312ms,
Total: 2719ms

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2.1.4 Observing Result Through Error Level
Error level exit status is provided for easier integration of the 56800E Flash Programmer into scripts and
manufacturing process control systems. Error level exit status gives the calling script information about
the programming result. Possible error level values with their descriptions are provided in Table 2-2.

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2.2 GUI Version
The GUI version is designed to quickly program the target device. It includes many of the features found
in the command line version. Figure 2-2 illustrates the main screen of the GUI.
Figure 2-2 Main Screen of the GUI Version of the Application
2.2.1 Programming an S-Record or ELF File
Use the following procedure to program an S-Record, or ELF file:
1. Start the 56800E Flash Programmer.
2. Ensure the settings are properly configured. Please see Section 2.2.4 for more information.
3. Select a S-Record, or ELF file to load using the ‘...’ button located on the GUI main screen.
4. Click the Program Button.
After performing these steps, the following dialog box, illustrated in Figure 2-3 appears.
Table 2-2 Error Level Exit Codes
Error Level Description
0Programming Finished Successfully
1Flash Configuration File Not Found
2S-Record File Not Found or Corrupted
3Command Converter Not Found
4Failed to Bring the Target DSP into Debug Mode
5Flash Verification Error
6Incorrect Parameters
7System Error
8Chip is Secured

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Figure 2-3 Progress Dialog for Programming the FLASH
This dialog box shows the current programming process of the 56800E Flash Programmer operation being
performed. The Details button reveals more information about the current operation being performed and
the operations already performed, illustrated in Figure 2-4. The Programming dialog box also provides a
Save to Log button. The Save to Log button allows the selection of a log file to save the contents revealed
by the Details button.
Figure 2-4 Progress Dialog for Programming FLASH with Details Revealed
2.2.1.1 Erasure Mode Option
There are three selections for the Erasure mode option found in Figure 2-2:
1. all—When Erasure mode is set to all, the entire DSC is erased regardless how much data is
programmed through the S-Record.
2. unit—When the Erasure mode is set to unit, a unit is erased if, and only if, a word is written to it.
3. page—When the Erasure mode is set to page, a page is erased if, and only if, a word is written to
it.
This option is identical to the erase=X option in the command line version.

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2.2.1.2 Leave Device in Debug Mode
This option leaves the device in Debug mode after the programming is completed.
The option is identical to the –d option in the command line version.
2.2.1.3 Wait for Device to Power-Up
This option waits for the device to power up before it begins programming. Normally the GUI attempts to
communicate with the device when a GUI command (i.e., Program, Verify, View Memory) is invoked. If
the device is not powered, the GUI reports an error. However, when the option is enabled, the 56800E
Flash Programmer waits for the device to power up.
The option is identical to the –w option found in the command-line version.
2.2.1.4 Lock Device After Programming
This option locks the device after programming the device is completed. The device is locked by writing
a value of 0xE70A to the SECLO_VALUE location in Flash. To support more complex features such as
the back door, load user’s own custom S-Record file, specifying these options.
This option is identical to the –lock switch found in the command-line.
2.2.1.5 Recovering Locked Memory
This option is not found on the main dialog. Instead, when the device is programmed, the 56800E Flash
Programmer determines if the device is locked. If the device is locked, a warning dialog box, illustrated in
Figure 2-5, appears.
• Select Yes to completely erase Flash Memory, allowing programming to proceed.
• Select No to abort current programming, allowing no data to be programmed to the DSC.
This is similar to the –recover option in the command line version; however, the GUI only recovers
memory if the device is already locked.
Figure 2-5 Warning Indicating the FLASH Memory is Locked

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2.2.2 Verifying an S-Record or ELF File
The GUI version can perform a verification of a given S-Record, or ELF file, ensuring its contents were
properly loaded onto the device. Verification can be performed with the following steps:
1. Start the 56800E Flash Programmer.
2. Ensure the Settings are properly configured. Please see Section 2.2.4 for more information.
3. Select a S-Record, or ELF file to load using the ‘...’ button.
4. Press the Verify Button.
After pressing the verify button the Verification Dialog similar to the one illustrated in Figure 2-6 appears.
Figure 2-6 Verification Dialog
If the device verification fails, the box illustrated in Figure 2-7 appears.
Figure 2-7 Verification Failure Alert
Verification cannot be performed if the memory is locked. An error will be displayed alerting the device
is locked.
2.2.3 Viewing Memory
The contents of the memory on the device can be viewed by simply pressing the View Memory button. A
dialog box similar to the one illustrated in Figure 2-8 appears.

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Figure 2-8 Memory Viewer
The memory viewer only allows 0x1000 words at a time to be viewed. This view restriction is due to
memory limitations on the Host PC. The address currently being viewed can be changed by typing a new
address in the address field, and then pressing the ENTER key. The type of memory being viewed, P
Memory or X Memory, is selected here as well.
2.2.3.1 Swapping the ASCII View
In certain circumstances, such as viewing strings embedded on the device, it is desirable to be able to swap
the ASCII view. Typically, the ASCII view matches the hexadecimal view byte-for-byte. When the Swap
ASCII View is enabled the ASCII display is swapped for each word.
2.2.3.2 Saving a Range of Memory
Selecting the Save Range button in the Memory Viewer dialog will cause a dialog similar to the one
illustrated in Figure 2-9. Here, the range and type of memory to be stored in the specified output file is
selected. The output file is a S–Record file. Unlike the View Memory dialog, the Save Memory Range
dialog is not limited to storing 0x1000 words. Rather, any length of words can be stored to a S–Record file.

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Figure 2-9 Save Memory Range Dialog Box
2.2.4 Changing the Settings
The Settings Dialog box, illustrated in Figure 2-10, allows definition of various settings, determining how
the device will be programmed and how to communicate with the device. This procedure allows the
selection of the Device Configuration File to be used.
.
Figure 2-10 Setting Dialog Box
2.2.4.1 Device Configuration File
The Configuration File defines how the FLASH units are organized on a given device. Locate the standard
configuration files using the Drop Down button, then select a Device Configuration file. To browse the

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file, select a Custom Configuration file and select the ‘...’ button.
2.2.4.2 Verify Only Programmed Words
By default, the 56800E Flash Programmer performs a CRC32 on entire units/pages, depending on the
Erasure mode. However, when this setting is enabled, only words actually programmed are verified.
This option is identical to the –verifyprog option in the command-line version.
2.2.4.3 JTAG Clock Speed
JTAG clock speed permits selection of the programmed speed of the device in kHz. By default, this value
is 800kHz. Setting this value higher allows the 56800E Flash Programmer to program the device more
quickly; however, if the speed is set too high, the DSC will not be able to be sustained, resulting in a
corrupted program to be loaded.
This option is identical to the -jtagclk=X option found in the command-line version.
2.2.4.4 Use Remote CCS
By default, the 56800E Flash Programmer connects to the CCS server running on the local machine. When
this option is selected, the 56800E Flash Programmer connects to the remote CCS server defined in the
Remote Address field.
2.2.4.5 CCS Port Number
By default, the 56800E Flash Programmer connects to the CCS server at the Port 41475. However, it is
possible to specify a different port for connection. This choice is useful when a connection to a CCS server
is behind a firewall. Contact your network administrator for more information about which ports are
available.
2.2.4.6 Configure to Use the Device
By default, the 56800E Flash Programmer uses the device already configured by the CCS server. It is
possible, however, to configure CCS to use a different device. The two devices able to be configured with
this tool are the Parallel Command Converter and the CodeWarrior USB TAP. When the 56800E Flash
Programmer is configured to use the Parallel Command Converter, it is necessary to also specify the LPT
port to be connected with the Parallel Command Converter.
These options are similar to the –LPTX, and –USB found in the command-line version.
2.2.4.7 CCS Timeout
This option specifies the amount of time the 56800E Flash Programmer will wait for CCS to respond
before the 56800E Flash Programmer will surrender. The default timeout is 5 seconds.
This option is identical to the –timeout=X option found in the command-line version.
2.3 Performance
The performance of the 56800E Flash Programmer is limited by the speed of the parallel/printer port in
the case of the Parallel Command Converter and the target device in the case of the CodeWarrior USB

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TAP. For Parallel Port devices, best results are achieved when the port is set to ECP mode. A typical time
needed for erasing, programming, and verification of the whole contents of program, data, and Boot Flash
units of the DSP56F8323 (24,576 words) with the CodeWarrior USB TAP, and with the JTAG clock set
to 800kHz, takes about 6 seconds. In the case when only a portion of the Flash Memory space is occupied
by the target 56800E Flash Programmer, the programming time will be proportionally shorter. The JTAG
clock speed can also have a dramatic effect on the programming speed, but if the JTAG clock speed is set
to a speed faster than the device can sustain, corrupted programming results.
2.3.1 Detailed performance information about Erasures
Currently, all DSCs using the 56800E core including the HFM (Flash Unit), have the following timing
characteristics:
Program Word: 20-40µs
Erase Page: 20ms (Fastest possible)
Mass erase: 100ms (Fastest possible)
However, due to overhead, the 568000E Flash Programmer performs a single page erasure about twice as
fast as a mass erase, therefore, a mass erase is faster if more than two pages are being programmed.
3. Advance Techniques
3.1 Partially Writing Over a Page/Unit
It is possible to program specific words of a device in the command line version. To program specific
words, run the program twice.
Example: fflash 56801x_flash.cfg -rP0x0:0x1fff original.s
fflash 56801x_flash.cfg original.s patch.s
Explanation:
The first command dumps the entire program Flash to an S-Record called original.s. The second command
loads original.s and then overwrites only the contents patch.s programs into original.s, and then
reprograms the entire device, resulting in only the words defined in patch.s being programmed on the
device.
3.2 Automated Loading Using a Batch File
One of the primary functions of the command-line version is to allow loading of software onto a device
once it has been assembled in preparation for shipping to the customer. This section outlines how a small
batch file can be created to make this process easier. First create a file called loadit.bat with the following
contents:
Example:
@ECHO OFF
:TOP