Hi eveyone,
I have a custom board with RT1064, using MCUXpresso 11.5.0 and SDK 2.11.0.
I'm trying to use internal flash to store some configuration and setting data. I've read this post: https://community.nxp.com/t5/i-MX-RT-Knowledge-Base/How-to-use-the-RT1064-on-chip-flash-as-NVM/ta-p/..., that covers the modifications to do to adapt the SDK examples (external IS25W memory) to the internal memory (W25Q32JV memory).
There are a couple of doubts I have:
- As stated in the datasheet, to enable the quad mode in the W25Q32JV we must set the bit 1 (mask 0x02) in the status register 2 with command 0x31 instead setting the bit 6 (mask 0x40) in the status register with command 0x01. So I think there is the need to define a new command item in the customLUT array and to modify the flexspi_nor_enable_quad_mode() function:
#define NOR_CMD_LUT_SEQ_IDX_WRITESTATUSREG2 14
/* Enable Quad mode */
[ 4 * NOR_CMD_LUT_SEQ_IDX_WRITESTATUSREG2 ] =
FLEXSPI_LUT_SEQ( kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x31, kFLEXSPI_Command_WRITE_SDR, kFLEXSPI_1PAD, 0x04 ),
status_t flexspi_nor_enable_quad_mode(FLEXSPI_Type *base)
{
...
flashXfer.seqIndex = NOR_CMD_LUT_SEQ_IDX_WRITESTATUSREG2;
...
}
- I don't understand the need to exchange the FLEXSPI command index for NOR_CMD_LUT_SEQ_IDX_READ_FAST_QUAD and NOR_CMD_LUT_SEQ_IDX_READ_NORMAL to align with XIP settings: the modified code is compiled exactly the same way as the original one
Are these considerations corret?
Many thanks
Biafra
