Comments on: PSoC 4 Flash Write

By: Alan Hawse

Alan Hawse — Thu, 20 Jul 2017 11:26:30 +0000

In reply to Alan Hawse.

I tried it and it works fine… here is a little block of code

When you program this and run it the LED is red… then hit reset and the LED becomes green.

int main(void)
{
CyGlobalIntEnable; /* Enable global interrupts. */

uint8_t buff[CY_SFLASH_SIZEOF_USERROW];

uint8_t *mySFlash;
mySFlash = (uint8_t*)CY_SFLASH_USERBASE;

if(mySFlash[0] != 0x12)
{
red_Write(0);
buff[0] = 0x12;
CySysSFlashWriteUserRow(0, buff);

}
else
{
green_Write(0);
}

while(1);
}

By: Alan Hawse

Alan Hawse — Thu, 20 Jul 2017 11:14:52 +0000

In reply to Rob Berry.

You should be able to use uint32 CySysSFlashWriteUserRow(uint32 rowNum, uint8 *rowData)
There is a macro called CY_SFLASH_NUMBER_USERROWS which tells you the number of user rows.
There is another macro called CY_SFLASH_USERBASE which tells you where the 0th row of user sflash resides.
I haven’t tried it… but it should work

By: Rob Berry

Rob Berry — Wed, 19 Jul 2017 14:52:30 +0000

Alan,
How do we access the user sflash portion to save data like calibration data that wont get overwritten with a firmware update?
I have tried to use the code / api from the 100 projects for 100 days, but it fails.
I am using the CyBle-224110-00
Thanks,
Rob

By: Alan Hawse

Alan Hawse — Mon, 12 Jun 2017 09:05:45 +0000

In reply to Holger. In general the SFLASH is reserved for use by Cypress to setup the part. There are however somewhere between 0 and 4 rows which can be used by customers. When you build each of the part there will be a #define created by PSoC Creator that will tell you how many rows you have to use.

By: Holger

Holger — Fri, 09 Jun 2017 12:59:49 +0000

Hi Alan,
again, great article. Thanks!
One question: Where to find more information about the SFLASH? Some devices seems to have SFLASH, but no comment is given in the related data sheet (e.g. CY8C4247LQI-BL483) How to identify devices having SFLASH?

Regards,
Holger