flash swap tutorial K64

roymessinger — Thu, 23 Feb 2017 21:54:43 GMT

Is there any tutorial for the flash swap feature in K64?

I've found this link but it does not explain exactly what and how to implement the flash swap feature.

Thanks.

Re: flash swap tutorial K64

mjbcswitzerland — Fri, 24 Feb 2017 00:05:36 GMT

Hi Roy

There is an application note using the swap block here:
http://cache.nxp.com/assets/document3s/data/en/application-notes/AN4533.pdf?fsrch=1&sr=1&pageNum=1

There is a working example at http://www.utasker.com/kinetis/FRDM-K64F.html#SWAP

The K64 user manual more or less explains how to do it.

There is full code in the links that I have shown you before (enable with define SUPPORT_SWAP_BLOCK to activate the driver).

Using VisualStudio and the K64 simulator the Flash swap block operation is emulated so that you can step through the complete procedure to see how it works. Essentially the code below handles it.

Regards

Mark

Professional support for Kinetis: http://www.utasker.com/index.html
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extern int fnSwapMemory(int iCheck)
{
    #define FLASH_SWAP_INDICATOR_ADDRESS    ((FLASH_START_ADDRESS + (SIZE_OF_FLASH/2)) - 32) // final sector in the first half of flash memory used as flash swap indicator
    unsigned long ulCommand;
    while (1) {
        ulCommand = ((SWAP_CONTROL_CODE_REPORT_SWAP_STATUS << 24) | 0x00ffffff); // note that the unused bytes in the command are set to 0xff so that it is clear whether they are changed by the operation (failed operations may otherwise not be detectable)
        if (fnFlashNow(FCMD_SWAP, (unsigned long *)FLASH_SWAP_INDICATOR_ADDRESS, &ulCommand) != 0) { // get the swap state
            return SWAP_COMMAND_FAILURE;                                 // error
        }
      //fnDebugHex(ulCommand, (WITH_LEADIN | WITH_CR_LF | sizeof(ulCommand)));
        switch ((unsigned char)(ulCommand >> 16)) {                      // switch on current swap mode
        case CURRENT_SWAP_MODE_UNINITIALISED:
            {
                int iPhrases = 0;
                unsigned long *ptrSwapIndicator = (unsigned long *)FLASH_SWAP_INDICATOR_ADDRESS;
                if (iCheck != 0) {                                       // if checking present state
                    return SWAP_STATE_UNINITIALISED;                     // uninitialised
                }
                while (iPhrases++ < ((FLASH_ROW_SIZE/sizeof(unsigned long)) * 2)) { // for each of the two phrases of each block containing the swap indicator
                    if (*(unsigned long *)fnGetFlashAdd((unsigned char *)ptrSwapIndicator) != 0xffffffff) {
                        fnDebugMsg("Cleaning swap indicator sector\r\n");
                        if ((fnFlashNow(FCMD_ERASE_FLASH_SECTOR, ptrSwapIndicator, (unsigned long)0)) != 0) { // erase the sector
                            return SWAP_ERASE_FAILURE;
                        }
                    }
                    if (iPhrases == (FLASH_ROW_SIZE/sizeof(unsigned long))) { // after checking the two phrases in the first block move to the second block
                        ptrSwapIndicator = (unsigned long *)(FLASH_SWAP_INDICATOR_ADDRESS + (SIZE_OF_FLASH/2)); // location in the second block
                    }
                    else {
                        ptrSwapIndicator++;                              // move to the next long word
                    }
                }
                ulCommand = ((SWAP_CONTROL_CODE_INITIALISE_SWAP_SYSTEM << 24) | 0x00ffffff); // set the flash swap indicator address to initialise the swap mechanism (this address is programmed to IFR swap memory and 0xff00 programmed to the swap indicator address in the first block)
                if (fnFlashNow(FCMD_SWAP, (unsigned long *)FLASH_SWAP_INDICATOR_ADDRESS, &ulCommand) != 0) { // start by initialising the swap process
                    return SWAP_COMMAND_FAILURE;
                }
                while (FTFL_FCCOB5 == CURRENT_SWAP_MODE_UNINITIALISED) {}// the current swap mode may take a little time to complete so wait until the new state is indicated
            }
            break;
        case CURRENT_SWAP_MODE_READY:
            ulCommand = ((SWAP_CONTROL_CODE_SET_SWAP_IN_UPDATE_STATE << 24) | 0x00ffffff);
            if (fnFlashNow(FCMD_SWAP, (unsigned long *)FLASH_SWAP_INDICATOR_ADDRESS, &ulCommand) != 0) {
                return SWAP_COMMAND_FAILURE;                             // error
            }
            while (FTFL_FCCOB5 == CURRENT_SWAP_MODE_READY) {}            // the current swap mode may take a little time to complete so wait until the new state is indicated
            break;
        case CURRENT_SWAP_MODE_UPDATE:
            if (iCheck != 0) {                                           // checking and not swapping
                if ((unsigned char)(ulCommand >> 8) != 0) {              // check the active block
                    return SWAP_STATE_USING_1;                           // block 1 is being used
                }
                else {
                    return SWAP_STATE_USING_0;                           // block 0 is being used
                }
            }
            else {
                // We are performing a swap from one active block to another
                // - this requires erasing the swap indicator of the non-active block
                //
                if ((fnFlashNow(FCMD_ERASE_FLASH_SECTOR, (unsigned long *)(FLASH_SWAP_INDICATOR_ADDRESS + (SIZE_OF_FLASH/2)), (unsigned long)0)) != 0) { // erase the sector
                    return SWAP_ERASE_FAILURE;
                }
            }
            // Fall through intentionally
            //
        case CURRENT_SWAP_MODE_UPDATE_ERASED:
            ulCommand = ((SWAP_CONTROL_CODE_SET_SWAP_IN_COMPLETE_STATE << 24) | 0x00ffffff);
            if (fnFlashNow(FCMD_SWAP, (unsigned long *)FLASH_SWAP_INDICATOR_ADDRESS, &ulCommand) != 0) {
                    return SWAP_COMMAND_FAILURE;
            }
            while (FTFL_FCCOB5 != CURRENT_SWAP_MODE_COMPLETE) {}         // the current swap mode may take a little time to complete so wait until the new state is indicated
            // Fall through intentionally
            //
        case CURRENT_SWAP_MODE_COMPLETE:
            return SWAP_STATE_SWAPPED;                                   // swap has completed - a reset is required to effect the new operation
        default:
            break;                                                       // unexpected - continue until a valid state is returned
        }
    }
    return 0;
}

Re: flash swap tutorial K64

kerryzhou — Mon, 27 Feb 2017 03:28:31 GMT

Hi roymessinger,

About the kinetis K series flash swap, you can refer to our application note:

http://cache.nxp.com/assets/documents/data/en/application-notes/AN4533.pdf?fsrch=1&sr=1&pageNum=1

This application note have the detail description.

The according software can be downloaded from this link:

http://cache.nxp.com/assets/documents/data/en/application-notes-software/AN4533SW.zip

Wish it helps you!

Have a great day,
Kerry

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Re: flash swap tutorial K64

eengineer — Tue, 07 Mar 2017 16:18:52 GMT

So why does it take me an hour of searching to find what has to be one of the most important app notes for the K60 series?

Has anyone ever considered organizing information into some logical structure, e.g. a wiki on each chip family, so that users don't have to waste time sorting through forums postings, which contain a great deal of duplicate and out of date information?

The Kinetis seem like decent products, but every time I go to find information, it is hugely frustrating and time consuming. Really sad.

Re: flash swap tutorial K64

kerryzhou — Wed, 08 Mar 2017 02:55:36 GMT

Hi E Engineer,

Actually, you can input the keyword in the search from our nxp website, for example, you want to get the flash swap an.

You can find the first one is what you need.

Wish it helps you!

Have a great day,
Kerry

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