Flash programing problem

[Leif]

I have designed and assembled custom board using XS1-L8A-TQ128-I4 processor. I can program and run simple test programs using XTAG-2 card. For some reason I do not manage to program external Flash memory attached to the device. The design is quite similar to the XK-1A development kit. MODE2 and MODE3 pins are attached to xSYS header as in reference. I take power from XTAG-2. Flash is attached to X0D00 (MISO), X0D01(CS), X0D10 (SCLK) and X0D11 (MOSI). I use XTimeComposer Community 13.0.2 in a Windows machine.There was problem the get AT25FS010N-SH27 chip that was used in XK-1A. I chose M25PE10 chip (digikey: M25PE10-VMN6P-ND) but had no success using that. After that, I removed one flash from startkit (Winbond 25X20CL) and had no success trying it. Then I ordered EPCS1SIBN flash (Farnell code 1453504). No success. According to list at:https://www.xmos.com/list-flash-devices ... cu...these memories should be supported "natively".I have modified .XN file to change memory type in lineand also defined the SPI interface. When I start flashing, there is warning F03098 about lack of write-protection. After there is no text and the process never ends.I have spent now few days and have not much hint about what goes wrong.br,\leif

[sethu_jangala]

The flash device on startKIT is "S25FL204K". Changing the XN file as shown below should work,

 <Device NodeId="0" Tile="0" Class="SPIFlash" Name="bootFlash" Type="S25FL204K">

  

[Leif]

I managed to run SPI_master_demo.xc example file and it runs when I made the change:

fl_DeviceSpec flash = FL_DEVICE_NUMONYX_M25P10;

to get correct flash ID.

Running in SPI mode 3
with SPI frequency 25MHz
expected flash ID: 202011
returned flash ID: 202011
Flash ID data returned from slave received correctly
Write speed test... Time taken: 114790ns, for 256 bytes: 2.11MB/s
Read speed test... Time taken: 23554090ns, for 51200 bytes: 2.06MB/s

So it seems that there is connection to the flash. I changed .xe file to have

<Device NodeId="0" Core="0" Class="SPIFlash" Name="bootFlash" Type="M25P10">

But running the flash command never ends, as before. And no prints after:

Warning: F03098 Factory image and boot loader cannot be write-protected on flash device on node "0".

[Leif]

I ordered AT25DF041A from mouser (556-AT25DF041A-SHF-B) and installed the chip to the board. This chip is end of life... I did not manage to program via xflash the device directly. I ran tests with spi_master_demo, and managed to read flash id, but reading in further test did not work, I just got FFFF..

In the next step I created a file named AT25DF041A.con (attached as .txt file) for flash definitions copied actually from SpecMacros.h FL_DEVICE_ATMEL_AT25DF041A definions. In flash configurations I set:

SPI spec file: ...\AT25DF041A.con

Boot partition size: 262144

Other Flash options: --noinq

I finally got:


Warning: F03086 Using default SPI clock divider (value 3; divide by 6).
Warning: F03102 Cannot check boot partition size for sector alignment.
Warning: F03102 The boot partition should contain a whole number of sectors
Warning: F03102 but this cannot be checked when the inquirer is disabled.
Warning: F03097 Cannot check factory image protection because --noinq was specified.

Site 0 has started.         
Site 0 has type 002.        
Site 0 write    0x00000000.
Site 0 verified 0x00000000.

...

Site 0 write    0x0000a800.
Site 0 verified 0x0000a800.
Site 0 has finished.        
xflash succeeded

First the card did not boot because 1V supply went on before 3.3V. Both are driven from same 5 V regulator that turns on slow. So there I need to make some changes. I put switch for 1V supply and ... the leds started to blink from flash program and even external USB-UART chip talked with computer side python script ! So the flash programming did work and program was loaded from flash in the startup.

As a moral, one should reserve some week or two for making the flash programming work in XMOS.