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www.ti.com Programming MSP Flash Devices Using the MSP Gang Programmer 41 SLAU358Q – September 2011 – Revised October 2019 Submit Documentation Feedback Copyright © 2011–2019, Texas Instruments Incorporated Operation NOT…

Programming MSP Flash Devices Using the MSP Gang Programmer

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SLAU358Q–September 2011–Revised October 2019

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Operation

The preceding example lists numbers that would be programmed to 8 target devices using a size of 8

bytes each. These hex numbers can represent integer values or ASCII text, depending on the application.

In the case of ASCII, the text must be converted to hex in the file.

After a set of 8 targets is programmed, the user must update the file (the same file name) with new

values. The following example lists a new set of 8 values:

01 0A A3 B4 32 35 65 2B

01 0A A3 B4 32 35 65 2C

01 0A A3 B4 32 35 65 2D

01 0A A3 B4 32 35 65 2E

01 0A A3 B4 32 35 65 2F

01 0A A3 B4 32 35 65 30

01 0A A3 B4 32 35 65 31

01 0A A3 B4 32 35 65 32

The programmer writes the numbers as provided to the specified flash or FRAM location. The provided

numbers must be the same size (in bytes) as specified in the Used size in bytes option (see Figure 2-17).

The SN or MAC number can be also saved to a dedicated register, if available on the target MCU; for

example, in the MSP432E4xx MCUs. In this case, select the MAC in Fixed location option. The address

for the MAC number is hardcoded and displayed (read only and grayed out) for user review in the Start

Address in Memory field (see Figure 2-17).

If the SN or MAC number is saved to flash or FRAM, the same address cannot be used by the program

code (specified in the code file). The programmer will display a warning if it detects a conflict between

address of the SN or MAC number and code. If the linker requires that the code file fill the SN or MAC

number location with a dummy value, select the Remove code contents in the location where the Unique

Number is defined option to overwrite this location with the correct SN or MAC number.

If location specified for the SN or MAC number is not empty (all 0xFF), the SN or MAC number is not

written to the target. If the programmer detects any value other that 0xFF, the existing value is restored

and the new SN or MAC number is ignored. This process keeps an existing SN or MAC number in the

target if the number was already programmed. To overwrite an existing value, erase the device memory

before programming.

NOTE: The MSP-GANG does not erase the existing SN or MAC number if the erase all memory

option is used. The old SN or MAC number is restored after the erase, the same way that

the defined retained bytes are restored.

The SN or MAC number can be erased; for example, if serialization is disabled. After erasing, the SN or

MAC number location can be used as regular memory.

2.1.9 Creating and Using Images

An image contains the code files and the configuration options necessary for programming of a target

device. Images can be stored as a binary file (".mspgangbin") in internal MSP Gang Programmer memory

(or SD card), or as an image file (".mspgangimage") on disk for redistribution. Image files intended for

redistribution can be encrypted with additional security features described later in this section.

Creating an image is done in Interactive Mode by following the same steps described in Section 2.1.4,

followed by pressing the "Save Image File As…" or "Save to Image" buttons. The first button saves the

code files and configuration options as a binary file and image file locally on disk, and the second button

saves this information directly to the MSP Gang Programmer internal memory. Note that to use the MSP

Gang Programmer in Standalone mode, you need to program at least one image to internal memory or

read a binary file from an SD card (using the SD card connector on the MSP Gang Programmer). If you

intend to modify the contents of an image at a later date, it is advisable to save the configuration options

as a project. Because an image is read-only, reading a project file is the only way to recreate images

easily without reentering the configuration options from scratch. After the project is loaded, a change can

be made and a new image with the same name can be created to overwrite the previous one.

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Operation

NOTE: Do not overwrite images unnecessarily during production

The image flash memory has a specified 10000 endurance cycles. Therefore, over the

lifetime of the product, each image can be reliably reprogrammed 10000 times.

Reprogramming images should be done once per production setup, rather than per

programming run. Reprogramming the image per programming run will quickly exhaust flash

endurance cycles and result in errant behavior.

In total, 96 different images can be saved internally in the MSP Gang Programmer or one image can be

saved on an SD card. Each image can be selected at any time to program the target devices. The MSP

Gang Programmer also allows the image to be saved in a file, either to be saved on an SD card or to be

sent to a customer. In order for the image file to be usable from the SD card, copy only the binary file

(".spgangbin") to the SD card and preserve the proper extension (Note that binary files are not encrypted).

For redistribution to a customer, the image file can be sent and encrypted with additional security features.

When a new image is saved to a file or to a MSP Gang Programmer internal memory, an image

configuration screen appears (see Figure 2-18). Enter any name up to 16 characters. This name is

displayed in the GUI image selector (see Figure 2-1) on the bottom line of the MSP Gang Programmer

LCD screen when the corresponding image is selected. Press OK when the name is entered.

Once you have created a programming setup using the steps mentioned above, it is useful to store it in

the form of an image. The advantage of an image is that it contains both the configuration options

necessary for programming as well as the code files that are flashed to target devices. Moreover, only

images can be saved to internal MSP Gang Programmer memory and used in Standalone mode, where

the programmer can operate without being connected to a PC.

Before the user proceeds to making images; however, it is advisable to save the MSP Gang Programmer

setup as a project first. This is recommended because images cannot be modified once created, only

overwritten. Therefore, if the user wants to change an image that has already been created without

recreating the whole configuration from scratch then it is necessary to load the corresponding project file.

Once the project is loaded, a change can be made and a new image with the same name can be created

to overwrite the old one.

Images can be saved to the programmer's internal memory, or on an external SD-Card. A total of 96

different images can be saved internally, or one image can be saved on an SD-Card. Each image can be

selected at any time to program the target devices. The MSP Gang Programmer also allows the image to

be saved in a file, either to be saved on an SD-Card or to be sent to a customer. When the code file and

configuration are ready to be saved, press the Save Image button to save to MSP Gang Programmer

internal memory, or the Save Image to file button to save to a file.

Whether the new image being created is saved to a file or to MSP Gang Programmer internal memory, an

image configuration screen appears (see Figure 2-18). Enter any name up to 16 characters. This name is

displayed in the GUI image selector (see Figure 2-1) and it is displayed on the bottom line of the MSP

Gang Programmer LCD screen when the corresponding image is selected. Press OK when the name is

entered.

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Operation

NOTE: The image name is limited to 16 characters. This name is shown on the LCD display of the MSP Gang

Programmer , and Image pulldown menu in the GUI.

Figure 2-18. Image Name Configuration Screen

NOTE: Since version 1.2.1.0, the number of images has increased from 16 (512KB each) to 96

(64KB each). Total image memory has decreased from 8MB to 6MB. For compatibility

purposes with older images, the numbering scheme for the new images uses an index and

subindex format (for example, 1.0, 1.1, 1.2... 1.7, 2.0, 2.1, 2.2... 12.7). The first index selects

the 512KB image memory block, and the subindex selects which 64KB portion of the 512KB

block is used. Old images that occupy 512KB always have the subindex as 0 (for example,

old Image 1 is now Image 1.0). Newly created images can occupy one 64KB block or more

(for example, a 128KB image stored in image number 2.1, will be saved to occupy blocks 2.1

and 2.2). Images 13 to 16 will be removed in future versions; however, during the transition

period, they can only be read or erased (that is, they are marked as read-only in the GUI).

The screen shown in Figure 2-19 allows the user configure what type of security is used to protect the

image file. Three options are available; however, for all three options the contents of the code file are

always encrypted and cannot be read.