Difference between revisions of "J-Flash"
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(Redirected page to UM08003 J-Flash) (Tag: New redirect) |
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| + | #REDIRECT [[UM08003_J-Flash]] |
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| − | __TOC__ |
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| − | =Version compatibility= |
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| − | J-Flash is backwards compatible (as all other J-Link software), meaning that any project files created with J-Flash version <''X''> |
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| − | can also be opened with any version of J-Flash newer than <''X''> (i.e. a project created with version V6.64 can also opened with V6.71d).<br> |
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| − | J-Flash is '''not''' forward compatible, meaning that J-Flash version <''X''> may not work correctly with projects created with versions newer than <''X''>.<br> |
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| − | [[File: JFlash_VersionInfo.png]] |
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| − | =Auto-update of project= |
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| − | When opening a J-Flash project with a version of J-Flash that is more recent than the version of J-Flash that the project was last saved with,<br> |
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| − | it can happen that J-Flash prompts the user to allow an automatic update of the J-Flash project contents.<br> |
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| − | This is for example the case when the information about internal flash banks of the selected target device<br> |
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| − | inside the J-Link shared library has changed from the older version of the J-Link software to the newer version.<br> |
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| − | In order for J-Flash to work properly, it is necessary for the project file information to be in sync with the information of the J-Link shared lib.<br> |
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| − | Because of that, it is necessary for J-Flash to update the project information accordingly - otherwise it cannot open the project file.<br> |
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| − | [[File: JFlash_AutoUpdate.png]] |
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| − | '''Note''':<br> |
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| − | In the process of auto-updating the J-Flash project file, some information (like the selection of sectors a flash bank) may get reset.<br> |
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| − | Because of that, it is highly recommended for any user to verify the correctness of the project file settings after an auto-update by J-Flash.<br> |
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| − | =CRC calculation= |
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| − | The CRC used is the CRC32-CCITT polynomial. |
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| − | Normal form: 0x04C11DB7 |
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| − | Reversed form: 0xEDB88320 (used by J-Flash) |
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| − | Please note, that the initial CRC used for the calculation is 0x00000000 (some calculators use 0xFFFFFFFF). |
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| − | Further information regarding this can be found here: |
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| − | * SEGGER Knowledge Base: Explaining [[CRC]] |
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| − | * Wikipedia: https://en.wikipedia.org/wiki/Cyclic_redundancy_check#Standards_and_common_use (table entry for CRC-32) |
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| − | * J-Flash User Guide: UM08003 chapter "9.1 CRC of current data file" |
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| − | J-Flash and Flasher are using a [[CRC]]. |
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| − | The CRC used is the CRC32-CCITT polynomial. |
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| − | Normal form: 0x04C11DB7 |
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| − | Reversed form: 0xEDB88320 (used by J-Flash) |
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| − | |||
| − | Please note, that the initial CRC used for the calculation is 0x00000000 (some calculators use 0xFFFFFFFF). |
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| − | |||
| − | Further information regarding this can be found here: |
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| − | * SEGGER Knowledge Base: Explaining [[CRC]] |
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| − | * Wikipedia: https://en.wikipedia.org/wiki/Cyclic_redundancy_check#Standards_and_common_use (table entry for CRC-32) |
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| − | * J-Flash User Guide: UM08003 chapter "9.1 CRC of current data file" |
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Revision as of 14:01, 6 May 2020
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