Problem in AVRDOS And Harddisk

ardroudi · Joined: 18 Oct 2005 Posts: 4 Location: Tehran

Hi.
I'm trying to setup atmega128 and a harddisk with avrdos
I use the test program, but error 17 occurs during file system init.
I dont know what should i do.
please help me

the harddisk is formated with fat32 and has two Partitions.
one is primary dos partition and another is logical partition.

Here is the code :

$regfile = "M128def.dat"
$crystal = 12000000
'------------------------------------------------------------------------------
$baud = 9600
Open "Com1:" As Binary As #1 ' use #1 for fs_interpreter
Config Clock = Soft
Enable Interrupts
Config Date = Mdy , Separator = .
'------------------------------------------------------------------------------
Dim Btemp1 As Byte
'------------------------------------------------------------------------------
Print #1 , "Wait for Drive"

$Include "Config_HardDisk_M128.bas"

If Gbdriveerror = 0 Then

$Include "Config_AVR-DOS.BAS"

Print #1 , "Init File System ... ";
Btemp1 = Initfilesystem(1) ' Partition 1
' use 0 for drive without Master boot record
If Btemp1 <> 0 Then
Print #1 , "Error: " ; Btemp1 ; " at Init file system"
Else
Print #1 , " OK"
Print #1 , "Filesystem: " ; Gbfilesystem
Print #1 , "FAT Start Sector: " ; Glfatfirstsector
Print #1 , "Root Start Sector: " ; Glrootfirstsector
Print #1 , "Data First Sector: " ; Gldatafirstsector
Print #1 , "Max. Cluster Nummber: " ; Gwmaxclusternumber
Print #1 , "Sectors per Cluster: " ; Gbsectorspercluster
Print #1 , "Root Entries: " ; Gwrootentries
Print #1 , "Sectors per FAT: " ; Gwsectorsperfat
Print #1 , "Number of FATs: " ; Gbnumberoffats
End If
Else
Print #1 , "Error during Drive Init: " ; Gbdriveerror
End If

oe9vfj · Joined: 17 Jun 2004 Posts: 269 Location: Austria, Hard

Hi ardroudi ,

Check, whether you can read the raw sectors of the disk.

If you use the TEST_DOS_Drive program with the FS_Interpreter you can dump a sector (for example sector 0) with SD 0.

Sector 0 is the master boot record. If you get an output from the command SD 0 without error, can you please post it, so I can see, what is the problem?

oe9vfj · Joined: 17 Jun 2004 Posts: 269 Location: Austria, Hard

You use an old version of the test-program.
Please update to version 5.4 from http://members.aon.at/voegel

ardroudi · Joined: 18 Oct 2005 Posts: 4 Location: Tehran

Dear Josef ,

It is much better for me to read and write raw data in memories such as mmc , hard disk or compact flash.

let me describe my project for you :

sorry. it is very long and i hope that you read this note and help me.

I designed a LED sign board in 3 colors and size 128*64.(it need 2Kbyte for each picture frame). main controller is a FPGA that send address out and read related data for that address. and the FPGA repeat this for another address.So in a loop the FPGA send address number 0 to 2047 and wants to read data for each address.

I must use a mass storage memory for that.(more than 32Mbyte)
It is too hard for me to write a VHDL code for the FPGA that read a MMC or hard disk or ...
So i decide to use an AVR.
AVR continuously read address (that sent by FPGA) and send related data that stored in internal 2Kbyte ram.AVR exactly act like a 2Kbyte ram.
but by a timer interrupt ,it will update the internal 2Kbyte ram with new data and after that it return to the past job(acting like a ram).

AVR code is look like below :

-START

-MAINLOOP:
-----ADDRESS = PORTX 'fpga will put it address to portx of avr
-----PORTY = RAM(ADDRESS) 'avr send related data to porty for fpga
-GOTO MAINLOOP

-TIMER INTERRUPT ROUTIN :
-----FOR I = 1 TO 2047
----------READ NEW DATA FROM A MEMORY
----------RAM(I) = NEW DATA
-----NEXT I
-RETURN

-END

You know when we want to show an animation, we must change picture frames rapidly to create the animation.
I made my animation data, frame by frame, and i put them to a MMC.
AVR in timer interrupt routin read 2Kbyte data (4 Sectors) from MMC.
but MMC is a little slow and main problem is here:
A GAP WILL OCCUR BITWEEN ANIMATION FRAMES.
NOW THE ANIMATION IS BLINKING AND IT'S NOT GOOD!

AVR must update internal ram in less than 20ms for a good animation.
So i have to use a fast and huge memory. MMC is good in amount of memory but not enough fast becouse of SPI mode.

I think harddisk is good because it send 16bit of data in a moment.
If i use a harddisk or compactflash i have to read data sector by sector.

I found AN#123 (Accessing a Compact Flash Card from BASCOM) files.
functions in file FlashCardDrive.bas is very suitable for me.
But i don't know how to use it for a harddisk.

please help me to read and write sectors of a harddisk.

Thank you
Best Regards

---------------------------
Amirreza Ardroudi

ardroudi · Joined: 18 Oct 2005 Posts: 4 Location: Tehran

Hi ,

In fact i want to use AN#123(Accessing a Compact Flash Card from BASCOM) files and fuctions, to read and write sectors of a harddisk.
Using Avr-Dos is not necessary for me.

Thank you in advance.
----------------------------
Amirreza Ardoudi

bzijlstra · Posted: Sun Feb 19, 2006 9:23 am Post subject: low level routines

There are some low level harddisk and compact flash routines on my homepage.

/software/bascom-examples

Have fun
Ben Zijlstra

ardroudi · Joined: 18 Oct 2005 Posts: 4 Location: Tehran

Thank you for your help ben.

I will check it.

oe9vfj · Joined: 17 Jun 2004 Posts: 269 Location: Austria, Hard

You can not use the code from AN123 for a HardDisk. The code works with the CF with 8-bit data exchange. Most HD support only an 16-Bit data bus.

You can read and write single sectors from/to Harddisk with the driver provided with AVR-DOS.

Check the schematic http://members.aon.at/voegel/Downloads/Driver/CF_HD/HardDisk_Schematic.gif and include the HD-driver to your application with following code: