Hi @schafbo
I am very sorry for the delayed response, I just wanted to maintain you updated.
I ran and tested on my end, I think that I replicated your issue. Let me explain my process, could you help me with yours?
In my case, I let the same address that the demo uses to write into a sector, which is 0x6001_4000. The target remap address is 0x6002_4000.
I linked i.MX RT1060-EVKB flexspi_polling_transfer (from SDK v2.16 ) to SRAM and added the below code, taken from AN12255SW flash_remap_test.
///////**** test reading 16 bytes from where we wrote earlier
memcpy(s_nor_read_buffer, (void *)(EXAMPLE_FLEXSPI_AMBA_BASE + EXAMPLE_SECTOR * SECTOR_SIZE),
sizeof(s_nor_read_buffer));
PRINTF("\r\n");
PRINTF("Read 16 bytes from flash address 0x%x ...\r\n",EXAMPLE_FLEXSPI_AMBA_BASE+EXAMPLE_SECTOR * SECTOR_SIZE);
for (i = 0; i < 16; i++)
{
PRINTF("0x%x,",s_nor_read_buffer[i]);
}
PRINTF("\r\n");
///////**** test reading 16 bytes from the remap address.
PRINTF("Read 16 bytes from flash address 0x%x ...\r\n",EXAMPLE_FLEXSPI_AMBA_BASE+EXAMPLE_SECTOR * SECTOR_SIZE+0x10000);
memcpy(s_nor_read_buffer, (void *)(EXAMPLE_FLEXSPI_AMBA_BASE + EXAMPLE_SECTOR * SECTOR_SIZE+0x10000),
sizeof(s_nor_read_buffer));
for (i = 0; i < 16; i++)
{
PRINTF("0x%x,",s_nor_read_buffer[i]);
}
PRINTF("\r\n");
PRINTF("\r\n");
PRINTF("Set Flash remapping \r\n");
FLEXSPI_SoftwareReset(EXAMPLE_FLEXSPI);
/// so actual remapping
IOMUXC_GPR->GPR30 = EXAMPLE_FLEXSPI_AMBA_BASE + EXAMPLE_SECTOR * SECTOR_SIZE;
IOMUXC_GPR->GPR31 = EXAMPLE_FLEXSPI_AMBA_BASE + EXAMPLE_SECTOR * SECTOR_SIZE+0x10000;
IOMUXC_GPR->GPR32 = 0x10000;
PRINTF("Set Flash remapping start address is 0x%x \r\n",IOMUXC_GPR->GPR30);
PRINTF("Set Flash remapping end address is 0x%x \r\n",IOMUXC_GPR->GPR31);
PRINTF("Set Flash remapping offset is 0x%x \r\n",IOMUXC_GPR->GPR32);
PRINTF("after enable flash remapping, re-read address 0x%x\r\n",EXAMPLE_FLEXSPI_AMBA_BASE+EXAMPLE_SECTOR * SECTOR_SIZE);
memcpy(s_nor_read_buffer, (void *)(EXAMPLE_FLEXSPI_AMBA_BASE + EXAMPLE_SECTOR * SECTOR_SIZE),
sizeof(s_nor_read_buffer));
PRINTF("\r\n");
PRINTF("Read 16 bytes from flash address 0x%x ...\r\n",EXAMPLE_FLEXSPI_AMBA_BASE+EXAMPLE_SECTOR * SECTOR_SIZE);
for (i = 0; i < 16; i++)
{
PRINTF("0x%x,",s_nor_read_buffer[i]);
}
PRINTF("\r\n");
I used the MCUXpresso IDE and manually linked the application to SRAM. This means that I need to debug with the IDE to softload to internal SRAM the demo. After pressing SW reset and running the demo again, I noticed that my demo failed.
After inspecting, It turns out that flash remapping was enabled, after doing SW reset with the debugger.
When the demo starts it first erases the given flash sector, for my case it is expected to be at physical address 0x6001_4000. It expects to read 0xFFs, but an error appears. The readout from the 0x60001_4000 gets the actual contents of 0x60002_4000.
Below the readout from debugger.
The AN12255SW flash_remap_test SW SDK used a flexspi_polling_transfer demo from an older SDK version and it does simmilar FlexSPI configuration calls. Probably the problem is that a reset on the flexspi is required.
Diego
