When trying to initialize flash swapping for reprogramming purposes, I am failing when calling to execute flash swap configuration commands using the FLASH_SwapControl function in the fsl_flash.c driver file when running my core clock frequency at 180MHz. Note, that it works fine when running at 120MHz. I have verified that my flash clock is divided down by 7 so that it is below the required 28MHz. The code used for configuring the flash is right out of the demo app up for reading/writing flash right up until we configure the swap as shown below:
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DEMO APP CODE from main function of SDK_2.0_MK26FN2M0xxx18/boards/twrk65f180m/driver_examples/flash/flash_erase_program_verify/flash_erase_program_verify.c
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OUR CODE BELOW:
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PRINTF("\r\n");
activeBlock = (FTFE->FCNFG >> 3) & 0x01;
if( activeBlock == 0 )
{
PRINTF("Program Flash Half 0 (Blocks 0/1) located at address 0x0000\n");
PRINTF("Executing from Program Flash Half 0 (Blocks 0/1) \n\n");
settingsAddress = pflashTotalSize - (3*pflashSectorSize) - pflashSectorSize;
}
else
{
PRINTF("Program Flash Half 1 (Blocks 2/3) located at address 0x0000\n");
PRINTF("Executing from Program Flash Half 1 (Blocks 2/3) \n\n");
settingsAddress = (pflashTotalSize / 2) - (3*pflashSectorSize) - pflashSectorSize;
}
flashSwapAddress = (pflashTotalSize / 2) - pflashSectorSize;
result = FLASH_SwapControl(&flashDriver, flashSwapAddress, kFLASH_swapControlOptionReportStatus, &flashSwapState);
if( result != kStatus_FLASH_Success )
{
PRINTF("\r\n ERROR flash_SwapControl optionReport Status Result = %d 0x%x", result, result);
}
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MORE UNRELATED CODE
The bolded line of code returns a 0x67 from the attempted call of flash_command_sequence. The 0x67 indicates a kFlash_AccessError.
Is there something we need to configure in the driver, or something else that needs to be done prior to making this call when running in High Speed mode?
