Hi Matt,
BTW, I found some potential issue, or at least waste of code in sd_card.jal
lib:
Here's the guilty function:
---
function sd_data_byte'get() return byte is
var byte x, data_byte
if sd_byte_count == 0 then -- beginning of sector read
while spi_master != 0xFE loop -- wait till data is ready to read
end loop
end if
data_byte = spi_master -- get data byte
if sd_byte_count == 512 then -- end of sector read
sd_sector_count = sd_sector_count + 1 -- increment sector number
x = spi_master -- get junk crc data, crc is
disabled
x = spi_master -- get junk crc data, crc is
disabled
end if
sd_byte_count = sd_byte_count + 1 -- increment byte_count
if sd_byte_count == 512 then
sd_byte_count = 0
end if
return data_byte
end function
---
When sd_byte_count = 511:
- enter the function
- you read data from spi
- sd_byte_count is incremented, now is 512
- since it's 512, it then sets to 0 (last "if")
As a consequence:
if sd_byte_count == 512 then -- end of sector read
sd_sector_count = sd_sector_count + 1 -- increment sector number
x = spi_master -- get junk crc data, crc is
disabled
x = spi_master -- get junk crc data, crc is
disabled
end if
nerver gets executed.
Am I right ?
Cheers,
Seb
2011/5/2 Sebastien Lelong <[email protected]>
> Hi Matt,
>
> Thanks for your effort, but this is still the same, fat32 get stuck within
> init procedure. I guess this is due to my fat32 partition, something is
> wrong with it. Included is an partial hexdump of my partition, showing
> content but only when changing. Format is:
>
> address b1 b2 b3 b4 b5 b6 b7 b8 b9 b0 b1 b2 b3 b4 b5 b6 |ascii ascii
> asci|
>
> (b0 is b10, then b1 is b11, etc...)
>
> If content didn't change, you'll get "*"
>
> If you have time (and only if), you might be able to what's going on by
> looking at addresses and content in order to see if data is wrong or not.
> Careful: there may be data residues from previous experiments (but you
> should be able to read important sectors in fat32)
>
> TIA
> Cheers,
> Seb
>
>
> 2011/5/2 mattschinkel <[email protected]>
>
>> Seb, I finally found time to fix the FAT32_SMALL cluster size issue.
>> Give it a try!
>>
>> Matt.
>>
>>
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