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AMD FLASH PROBLEM S29GL064M11TAIR0

Altera_Forum
Honored Contributor II
1,504 Views

AMD FLASH PROBLEM 

 

because it was difficult to buy an AMD FLASH AM29LV065DU-120REI,  

AMD recommended to use the newer S29GL064M11TAIR0, which is pin compatible and CFI  

compliant. 

 

Now we have some custom boards,where the NIOS FLASH Programmer does not  

work with the S29GL064M11TAIR0 (boards with AM29LV065DU-120REI work fine) 

 

QUARTUS 4.1 SP2 

NIOSII V1.0 SP1 

 

 

-------------------------------------------------------------------------------- 

 

make: Entering directory `/cygdrive/i/12DXI02_SOFTWARE/boot01/Debug' 

nios2-flash-programmer --input=ext_flash.flash --sof=`C:/altera/quartus41/sopc_builder/bin/find_sopc_component_dir BOARD_12DIXI02`/system/BOARD_12DIXI02.sof --device=2 "--cable='USB-Blaster [USB-0]'" --base=0x00800000 

13.01.2005 10:05:08 - (INFO) nios2-flash-programmer: Launching Quartus Programmer to download: 

I:/12DXI02_FPGA/BOARD_12DIXI02/system/BOARD_12DIXI02.sof 

Pre-Reading 125KBytes of data from D5: 

|----.----+----.----| 

********************* (1.016 sec). 

Erasing 2 Sectors: 

|----.----+----.----| 

********************* (1.437 sec). 

Writing 128KBytes : 

|----.----+----.----| 

**** 

Bad ack from Target. 

 

Yikes!, Bad Acknowledge Command-Field,  

 

Command-Packet Was: 

 

+---Flash-Monitor Protocol Packet---------- 

| Command : W 

| Flash-Base : 8388608 

| Flash-Offset : 24576 

| Command-Set : 2 

| Flash Width : 1 

| Flash Mode : 1 

| payload size: 4096 

| Payload : 

| 00000000: 1E 05 00 10 17 00 80 E0 17 00 C0 E0 17 40 80 10 | .............@.. 

| 00000010: 17 41 00 19 3A E8 3E 10 17 00 80 E0 85 01 00 10 | .A..:.>......... 

| 00000020: 17 00 80 E0 05 01 00 10 17 00 80 E0 03 01 80 10 | ................ 

| 00000030: 15 03 80 E0 17 03 C0 E0 E0 00 80 18 1E 4C 00 10 | .............L.. 

| 00000040: 17 03 C0 E0 08 01 80 18 1E 04 00 10 17 03 C0 E0 | ................ 

| 00000050: 3A 00 05 18 1E 08 00 10 06 ED 01 00 17 03 C0 E0 | :............... 

| 00000060: 20 01 80 18 1E 9B 01 10 17 03 C0 E0 60 01 80 18 | ...........`... 

| 00000070: 1E E3 01 10 06 E6 01 00 17 00 80 E0 03 11 80 10 | ................ 

| 00000080: 58 00 80 10 1E E2 01 10 17 00 80 E0 05 11 00 10 | X............... 

| 00000090: 17 00 80 E0 15 08 00 10 17 00 80 E0 15 09 00 10 | ................ 

| ...  

| 00000F70: 80 61 05 08 17 00 80 E0 8B 0E 80 10 B4 20 00 01 | .a........... .. 

| 00000F80: 04 F3 31 21 3A 88 0B 10 80 61 05 08 17 00 80 E0 | ..1!:....a...... 

| 00000F90: 8B 04 80 10 B4 20 00 01 04 F9 31 21 3A 88 0B 10 | ..... ....1!:... 

| 00000FA0: 80 61 05 08 17 00 80 E0 0B 0E 80 10 B4 20 00 01 | .a........... .. 

| 00000FB0: 04 FF 31 21 3A 88 0B 10 80 61 05 08 17 00 80 E0 | ..1!:....a...... 

| 00000FC0: 8B 0F 80 10 B4 20 00 01 04 05 32 21 3A 88 0B 10 | ..... ....2!:... 

| 00000FD0: 80 61 05 08 17 00 80 E0 0B 10 80 10 B4 20 00 01 | .a........... .. 

| 00000FE0: 04 0B 32 21 3A 88 0B 10 80 61 05 08 17 00 80 E0 | ..2!:....a...... 

| 00000FF0: 8B 10 80 10 B4 20 00 01 04 11 32 21 3A 88 0B 10 | ..... ....2!:... 

+------------------------------------------ 

 

Ack-Packet Was: 

 

+---Flash-Monitor Protocol Packet---------- 

| Command : ! 

| Flash-Base : 8388608 

| Flash-Offset : 24576 

| Command-Set : 2 

| Flash Width : 1 

| Flash Mode : 1 

| payload size: 0 

| Payload : 

+------------------------------------------ 

 

Unable to send write-packet @24576 

buffer-chunk write failed @24576 

erase-block write failed @24576 

write failed @0 

13.01.2005 10:05:19 - (SCHWERWIEGEND) nios2-flash-programmer: Unable to write to flash 

13.01.2005 10:05:19 - (SCHWERWIEGEND) nios2-flash-programmer: Error: Write-operation failed on device. - exiting. 

make: *** [ext_flash_programflash] Error 8 

make: Leaving directory `/cygdrive/i/12DXI02_SOFTWARE/boot01/Debug' 

 

 

-------------------------------------------------------------------------------- 

 

make: Entering directory `/cygdrive/i/12DXI02_SOFTWARE/boot01/Debug' 

nios2-flash-programmer --input=ext_flash.flash --sof=`C:/altera/quartus41/sopc_builder/bin/find_sopc_component_dir BOARD_12DIXI02`/system/BOARD_12DIXI02.sof --device=2 "--cable='USB-Blaster [USB-0]'" --base=0x00800000 

13.01.2005 12:54:26 - (INFO) nios2-flash-programmer: Launching Quartus Programmer to download: 

I:/12DXI02_FPGA/BOARD_12DIXI02/system/BOARD_12DIXI02.sof 

Pre-Reading 125KBytes of data from D5: 

|----.----+----.----| 

********************* (1.031 sec). 

Erasing 2 Sectors: 

|----.----+----.----| 

********************* (1.531 sec). 

Writing 128KBytes : 

|----.----+----.----| 

****Unable to send write-packet @24576 

buffer-chunk write failed @24576 

erase-block write failed @24576 

write failed @0 

13.01.2005 12:54:41 - (SCHWERWIEGEND) nios2-flash-programmer: Unable to write to flash 

13.01.2005 12:54:41 - (SCHWERWIEGEND) nios2-flash-programmer: Error: Write-operation failed on device. - exiting. 

make: *** [ext_flash_programflash] Error 8 

make: Leaving directory `/cygdrive/i/12DXI02_SOFTWARE/boot01/Debug' 

 

 

 

 

 

I'm not a flash expert, but  

having a look at the datasheet of S29GL064M11TAIR0 does not show the  

single word program command which is used by the following function 

(write to buffer and program buffer) 

 

/* 

* alt_program_amd 

*  

* Program a block (or part of one) 

*  

* Use the old fashioned word at a time program method 

* that way it will work on all devices 

* There is another mechanism which puts the device into a mode and 

* then writes Addr, Data Addr, Data etc. 

*/ 

int alt_program_amd(alt_flash_dev* flash_info, int block_offset,  

int offset, const void* src_addr,  

int length) 

... 

 

 

 

- will this flash type (S29GL064M11TAIR0) be supported by altera ? 

- which newer FLASH devices can be used with NIOSII and the flash programmer ? 

- how can the flash programmer be modified to support other flash devices ? 

 

thanks
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12 Replies
Altera_Forum
Honored Contributor II
477 Views

<div class='quotetop'>QUOTE </div> 

--- Quote Start ---  

I&#39;m not a flash expert, but  

having a look at the datasheet of S29GL064M11TAIR0 does not show the  

single word program command which is used by the following function 

(write to buffer and program buffer) 

 

/* 

* alt_program_amd 

*  

* Program a block (or part of one) 

*  

* Use the old fashioned word at a time program method 

* that way it will work on all devices 

* There is another mechanism which puts the device into a mode and 

* then writes Addr, Data Addr, Data etc. 

*/ 

int alt_program_amd(alt_flash_dev* flash_info, int block_offset,  

int offset, const void* src_addr,  

int length) 

... 

 

 

 

- will this flash type (S29GL064M11TAIR0) be supported by altera ? 

- which newer FLASH devices can be used with NIOSII and the flash programmer ? 

- how can the flash programmer be modified to support other flash devices ? 

 

thanks[/b] 

--- Quote End ---  

 

 

First things first it&#39;s a common mistake to look at the HAL code and assume that this is the flash programmer code. This is incorrect.  

 

Looking at the HAL code in the 1.1 kit and the datasheet for this part http://www.amd.com/us-en/assets/content_ty...xxa_00_a1_e.pdf (http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/s29glxxxa_00_a1_e.pdf) I found that the code matched the Program sequence in table 18. Obviously it&#39;s not 100% possible to say that it will work without trying it. One thing to note is that a number of flash companies claim their parts are CFI compliant which are not, though AMD is not one I have seen do this in the past.
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Altera_Forum
Honored Contributor II
477 Views

Thanks for your reply, 

 

I know that the HAL code is not the FLASH Programmer code, but both must work 

for our system. 

 

I updated to Quartus 4.2 and NIOS 1.1 

 

I converted a project and got the following result 

 

- SOPC Builder generated,Quartus compiled without problem 

- software compiled  

(small change: did not recognized "#include<sys\ioctl.h"  

changed to "#include<sys/ioctl.h" 

 

- NIOS Flash Programmer from IDE makes a lot of trouble 

- NIOS Flash Programmer from shell script works with AMD FLASH AM29LV065DU-120REI 

- NIOS Flash Programmer from shell script does not work with AMD FLASH S29GL064M11TAIR0 

 

additional to the flash problem, I have the following problem 

- SOME USER INTERFACE LOGIC DOES NOT WORK AS EXPECTED  

 

 

 

 

when I iopen the flash programmer from the ide ,I always get the message:  

 

"There is a problem with the target board. Check the target board selection in SOPC Builder 

for this system" 

 

after closing IDE, opening Quartus, opening SOPC Builder, closing SOPC-Builder, 

opening IDE again (! no changes, just open and close)), sometimes everything 

is ok and I can start the flash programmer. 

(I had this problem several times with NIOS 1.0, but now it got worsened)  

 

when I can start FLASH Programmer, I get the folowing message: 

 

 

-------------------------------------------------------------------------------- 

# ! /bin/sh# # This file was automatically generated by the Nios II IDE Flash Programmer.# # It will be overwritten when the flash programmer options change.#  

 

cd I:/12DXI02_SOFTWARE/te1_01/Debug 

# Creating .flash file for the FPGA configuration 

$SOPC_KIT_NIOS2/bin/sof2flash --flash=D5 --offset=0x00700000 --input=I:/12DXI02_ 

FPGA/standard.sof --output=standard.flash 

Info: ******************************************************************* 

Info: Running Quartus II Convert_programming_file 

Info: Command: quartus_cpf --no_banner --convert I:/12DXI02_FPGA/standard.sof st 

andard.rbf 

Info: Quartus II Convert_programming_file was successful. 0 errors, 0 warnings 

Info: Processing ended: Fri Jan 14 20:47:20 2005 

Info: Elapsed time: 00:00:00 

# Programming flash with the FPGA configuration 

$SOPC_KIT_NIOS2/bin/nios2-flash-programmer --input=standard.flash --sof=/system/ 

BOARD_12DIXI02.sof --cable=&#39;USB-Blaster [USB-0]&#39; --base=0x00800000 

14.01.2005 20:47:22 - (INFO) nios2-flash-programmer: Launching Quartus Programme 

r to download: 

/system/BOARD_12DIXI02.sof 

Error: Can&#39;t locate programming file BOARD_12DIXI02.sof (/system/;) in Chain Des 

cription File  

14.01.2005 20:47:24 - (SCHWERWIEGEND) nios2-flash-programmer: Unable to download 

SOF: /system/BOARD_12DIXI02.sof, exiting 

# Creating .flash file for the project 

$SOPC_KIT_NIOS2/bin/elf2flash --flash=D5 --base=0x00000000 --end=0x800000 --rese 

t=0x0 --input=te1_01.elf --output=ext_flash.flash --boot=$SOPC_KIT_NIOS2/compone 

nts/altera_nios2/boot_loader_cfi.srec 

# Programming flash with the project 

$SOPC_KIT_NIOS2/bin/nios2-flash-programmer --input=ext_flash.flash --sof=__NO_SO 

F_PLEASE__ --cable=&#39;USB-Blaster [USB-0]&#39; --base=0x00800000 

14.01.2005 20:47:26 - (INFO) nios2-flash-programmer: SOF-download skipped. 

14.01.2005 20:47:27 - (SCHWERWIEGEND) nios2-flash-programmer: Error opening targ 

et hardware 

jtag_atlantic connection failed to open: 

There are no JTAG UARTs available which match the --device and 

--instance options you provided. 

 

14.01.2005 20:47:27 - (SCHWERWIEGEND) nios2-flash-programmer:  

In order to program flash, you must first create a purpose-built 

flash-programming design (i.e. FPGA configuration) and associate it with 

your particular board. The Nios development kit is delivered with purpose-bui 

lt 

flash-programming designs pre-built for several development boards. If you wi 

sh 

to program flash on your own board, you must first create a flash-programming 

design. 

 

The process of creating a flash-programming design for your board is mostly 

automated. From a bash-shell, execute this script: 

 

mk_target_board --help 

 

The help-message includes references to other documentation on programming 

flash and targeting Nios systems to custom board designs. 

- exiting. 

 

-------------------------------------------------------------------------------- 

 

 

 

the following is the output from the flash programmer for AMD FLASH S29GL064M11TAIR0 

(shell script) 

 

 

---------------------------------------------------------------------------- 

COPY FILE : standard.SOF 

`../12DXI02_FPGA/standard.SOF&#39; -> `standard.SOF&#39; 

---------------------------------------------------------------------------- 

CONVERT FILE : standard.SOF 

to : standard.FLASH 

FLASH ID : U1 

OFFSET : 0x00700000 

---------------------------------------------------------------------------- 

14.01.2005 21:03:19 - (FEIN) sof2flash: Starting 

Info: ******************************************************************* 

Info: Running Quartus II Convert_programming_file 

Info: Command: quartus_cpf --no_banner --convert standard.SOF standard.rbf 

Info: Quartus II Convert_programming_file was successful. 0 errors, 0 warnings 

Info: Processing ended: Fri Jan 14 21:03:20 2005 

Info: Elapsed time: 00:00:01 

14.01.2005 21:03:20 - (FEIN) sof2flash: Done 

PRG:standard.flash 

---------------------------------------------------------------------------- 

PROGRAM FILE : standard.flash 

BOARD FILE : BOARD_12DIXI02.sof 

CABLE : USB-Blaster [USB-0] 

JTAG-DEVICE : 2 

FLASHPRG BASE ADD : 0x00800000 

---------------------------------------------------------------------------- 

14.01.2005 21:03:21 - (INFO) nios2-flash-programmer: Launching Quartus Programmer to download: 

BOARD_12DIXI02.sof 

Pre-Reading 283KBytes of data from U1: 

|----.----+----.----| 

********************* (2.36 sec). 

Erasing 5 Sectors: 

|----.----+----.----| 

********************* (4.406 sec). 

Writing 320KBytes : 

|----.----+----.----| 

**14.01.2005 21:03:42 - (SCHWERWIEGEND) nios2-flash-programmer: Unable to write to flash 

14.01.2005 21:03:42 - (SCHWERWIEGEND) nios2-flash-programmer: Error: Write-operation failed on device. - exiting. 

--- !!! ERROR !!! !!! ERROR !!! !!! ERROR !!! !!! ERROR !!! --- 

FEHLER PROGRAMMIERUNG 

 

First I need help with the flash programmer,  

I will post some info with the problem with user logic when i have more test results  

 

thanks
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Altera_Forum
Honored Contributor II
477 Views

FLASH TYPES PROBLEM (S29GL064M): 

 

you are right, the document from your link for S29GLxxxa really has the word  

programming command, but when I look at the TSOP package, it seems not to be 

pin compatible with type Am29LV065D. 

 

the type which AMD recommended to use is not this type (S29GL064A) , it is 

S29GL064M, see  

 

http://www.amd.com/us-en/assets/content_ty...xxm_00_b3_e.pdf (http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/s29glxxxm_00_b3_e.pdf

 

and look there at the command table, there is no word programming mode. 

 

I am a little bit confused, I thought that "CFI compliant" means  

"software compatible".
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Altera_Forum
Honored Contributor II
477 Views

Hi Fischer, 

 

I think we are working on the same project http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/smile.gif . My Flash was an Atmel AT49BV162A which &#39;has a CFI&#39;. Same error messages: 

<div class='quotetop'>QUOTE </div> 

--- Quote Start ---  

Bad ack from Target. 

 

Yikes!, Bad Acknowledge Command-Field,  

 

Command-Packet Was: ......[/b] 

--- Quote End ---  

 

from Altera I&#39;ve got an eMail through my FAE that this will be solved in the next version. Meanwhile I removed Flash totally from my design, so this issue doesn&#39;t concern me further. 

 

<div class='quotetop'>QUOTE </div> 

--- Quote Start ---  

additional to the flash problem, I have the following problem 

- SOME USER INTERFACE LOGIC DOES NOT WORK AS EXPECTED[/b] 

--- Quote End ---  

 

with quartus 4.2 register slaves now have other sub addresses, they are accessed always in steps by 4 independent of their width (as documented in avalon specs). 

see other thread ... (http://www.niosforum.com/forum/index.php?act=st&f=2&t=903&hl=

 

The other issue: 

<div class='quotetop'>QUOTE </div> 

--- Quote Start ---  

"There is a problem with the target board. Check the target board selection in SOPC Builder 

for this system"[/b] 

--- Quote End ---  

 

costs you really time. You can recompile your design and then use &#39;flash programmer&#39; but only once. Then you have again "... a problem with the target board...". Sometimes it helps if you leave the room, or turn yourself twice. Then it works again. sometimes. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/dry.gif  

Sorry, no help. 

Mike
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Altera_Forum
Honored Contributor II
477 Views

again ide flash programmer problem 

 

hi mike, yes I can leave the room twice,turn mysel 10 times and then if the ide 

is happy with the target board and i can start programming, it stops with the  

error message above, because the script generated by the ide is wrong.  

 

 

 

!!! I do not understand, why there is no input box in the flashprogrammer tool  

!!! where I can enter the path to the board sof-file !!! 

 

from where does the ide flashprogrammer get&#39;s the information for the board.sof 

file ??? 

 

in my case  

the ide flashprogrammer writes the script flash_programmer.sh 

 

-- the path "--sof=/system/BOARD_12DIXI02.sof" is wrong 

--sof=__NO_SOF_PLEASE__ is wrong
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Altera_Forum
Honored Contributor II
477 Views

 

--- Quote Start ---  

originally posted by fischer@Jan 14 2005, 08:06 PM 

flash types problem (s29gl064m): 

 

you are right, the document from your link for s29glxxxa really has the word  

programming command, but when i look at the tsop package, it seems not to be 

pin compatible with type am29lv065d. 

 

the type which amd recommended to use is not this type (s29gl064a) , it is 

s29gl064m, see  

 

http://www.amd.com/us-en/assets/content_ty...xxm_00_b3_e.pdf (http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/s29glxxxm_00_b3_e.pdf

 

and look there at the command table, there is no word programming mode. 

 

i am a little bit confused, i thought that "cfi compliant" means  

"software compatible". 

--- Quote End ---  

 

Fischer, 

 

Looking at the link you posted Table 35 on page 113 contains the Program command. 

 

As for CFI Compliant meaning software compatible, it should, however there is no body which certifies whether a flash is CFI compliant.  

 

In the last few weeks alone I have seen a flash which claimed to be CFI compliant and indeed you could get a CFI table, however the mechanism used to get the CFI table was not that documented in the CFI spec, so it wasn&#39;t software compatible. I have also seen a flash chip which had an invalid CFI table, again not software compatible.
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Altera_Forum
Honored Contributor II
477 Views

Fischer, 

 

I dont&#39;t believe that the message ....  

<div class='quotetop'>QUOTE </div> 

--- Quote Start ---  

"There is a problem with the target board. Check the target board selection in SOPC Builder for this system" [/b] 

--- Quote End ---  

really describes the problem. I guess there is a problem with the java runtime. When I get this message, I close flash programmer, start quartus, start sopc builder and start flash programmer again and there is no error message. As long as the SOPC builder remains open, I can use flash programmer! 

In the past, there was a problem with javaw.exe which is used by NIOS IDE as well as SOPC builder and leaded sometimes to a hanging system. This is obviously solved. I removed an additional java runtime installation I had, but without any success. 

 

 

--- Quote Start ---  

originally posted by fischer@Jan 15 2005, 06:43 PM 

....  because the script generated by the ide is wrong.  

--- Quote End ---  

 

My design is named: &#39;ComMan&#39;, my Custom board is &#39;CM_Board&#39; and my only flash is a EPCS4. My generated Flash programmer script consists of four commands: 

# Creating .flash file for the FPGA configuration $QUARTUS_ROOTDIR/NIOS_11/bin/sof2flash --flash=U4 --offset=0x00000000 --epcs --input=D:/Projects/CMNios/FPGA/ACT/ComMan.sof --output=ComMan.flash # Programming flash with the FPGA configuration $QUARTUS_ROOTDIR/NIOS_11/bin/nios2-flash-programmer --input=ComMan.flash -- sof=D:/Projects/CMNios/FPGA/ACT/CM_Board/system/CM_Board.sof --cable=&#39;ByteBlasterII &#39; --epcs # Creating .flash file for the project $QUARTUS_ROOTDIR/NIOS_11/bin/elf2flash --flash=U4 --epcs --base=0x0 --end=0x7fffffff --input=CM_Boot.elf --output=epcs_controller.flash --boot=$QUARTUS_ROOTDIR/NIOS_11/components/altera_nios2/boot_loader_epcs.srec # Programming flash with the project $QUARTUS_ROOTDIR/NIOS_11/bin/nios2-flash-programmer --input=epcs_controller.flash --sof=__NO_SOF_PLEASE__ --cable=&#39;ByteBlasterII &#39; --epcs 

But these commands are processed after flash programmer has established a connection to the target board and this script works (even with __NO_SOF_PLEASE as my target design is already programmed with the socond command (it is included in ComMan.flash) ). Perhaps it helps if you compare these with your script. If your design name doesn&#39;t match delete all *.launch files from "NIOSDIR\bin\eclipse\workspace\.metadata\.plugins\org.eclipse.debug.core\" and create a new Flash Programmer Configuration. 

The custom board design will be automatically found, if placed in your final design directory. (b.t.w. All (!) custom boards placed there, will be found and processed perhaps) 

If I&#39;ll figure out anything concerning this issue I&#39;ll post it here. 

 

Mike
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Altera_Forum
Honored Contributor II
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because the AMD FlASH chip Am29LV065D is difficult to buy and expensive, 

can some users please post the type of their flash chip they are using and  

if they work with nios2-flash-programmer.  

thanks
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Altera_Forum
Honored Contributor II
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We are developing a board that will be using the Spansion S29GL128M flash part. 

I am very concerned about the level of software support for this part. 

I&#39;m worried that the flash programmer will work properly, as well as the MTD drivers under Linux. 

I have this listed as one of the primary risks of the project. 

I was also told by our local AMD rep. that the Spansion part is the best choice for new designs and that it is CFI compliant. 

 

Are there enough people using this flash part to pressure Altera into officially supporting it in their SOPC builder? 

 

As for the Linux MTD support, I&#39;ll have to see what the MTD project has available and possibly make the changes myself.
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Altera_Forum
Honored Contributor II
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Hi trk_golf, 

 

do you have any more information on designing a board with Spansion S29GL128M flash and a Nios ? 

I am interested in your results since we plan to develop such a board too. 

 

Thanks  

 

cetic
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Altera_Forum
Honored Contributor II
477 Views

We haven&#39;t quite made it to the stage where we would be able to test this implementation. 

It is indeed part of our plan, because AMD themselves have recommended using this Spansion branded flash chip (S29GL128M) over some of their earlier AMD flash chips. 

We are also running uClinux and plan to use JFFS2 for our flash system, so we have a lot to test and configure. 

 

1) Support for flash chip on Avalon bus. 

2) Support for flash chip with the flash programmer tool. 

3) Support for flash chip under the Linux mtd drivers. 

4) Support for the flash chip under the Linux JFFS2 filesystem. 

 

If we can get all of these items working, then our flash choice will work. Our contingency plan will be to move back to a 8MB flash chip and simply use the one that is on the Microtronix uKit board. 

 

We will be putting forth some good effort towards getting the S29GL128M flash chip to work. Our only enemy will be time. If we can&#39;t get things resolved quick enough, we will have to resort to the older flash. 

 

I will post our progress so others may benefit. 

 

Since we haven&#39;t implemented it yet, we would also like to know if anyone else has made it further down this path.
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Altera_Forum
Honored Contributor II
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Hello, 

 

do you have more information, about the support for the S29GL128M from AMD ? I plan to use a S29GL256M, and I would like to know wheter the Flash programmer can be used (and the MTD driver under uClinux). 

 

Another question : Since I want to set a JFFS2 on that flash, what will give me the best performance : using it in byte mode or in word mode ? 

 

Thanks for you answer, 

 

pod
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