I tried mine with SDHC and it doesn't work... Have to investigate, it's supposed to work...
The version you started with is only going to support SD, not SDHC. There's a lot of work needed to support SDHC. Right now only 24 bit address is sent, not 32 bit address required by sdhc. Minimum changes are;
pri cmd(op, parm)
'
' Send a full command sequence, and get and
' return the response. We make sure cs is low,
' send the required eight clocks, then the
' command and parameter, and then the CRC for
' the only command that needs one (the first one).
' Finally we spin until we get a result.
DRVL_(cs)
read
send($40+op)
send(parm >> 24)
send(parm >> 16)
send(parm >> 8)
send(parm << 0)
if (op == 0)
send($95)
else
send($87)
return readresp
pub start_explicit(iDO, iCLK, iDI, iCS)| t, c 'chz added cmd58 for sdhc
do := iDO
clk := iCLK
di := iDI
cs := iCS
c := clk
outh_(cs)
outh_(clk)
outh_(di)
dirh_(cs)
dirh_(clk)
dirh_(di)
asm
rep #.initclksout, #4800
drvnot c
.initclksout
getct t
endasm
starttime := t
cmd(0, 0)
drvh_(cs) ' Deselect the card to terminate a command.
cmd(8, $1aa)
read
read
read
read
drvh_(cs) ' Deselect the card to terminate a command.
repeat
cmd(55, 0)
t := cmd(41, $4000_0000)
drvh_(cs) ' Deselect the card to terminate a command.
if t <> 1
quit
if t
return -40'abort -40 ' could not initialize card
cmd(58, 0)
sdhc := (read >> 6) & 1
read
read
read
drvh_(cs) ' Deselect the card to terminate a command.
if sdhc == 0 ' if not hc
return -41 ' fail mount
return sdhc +1 ' return card type
I don't understand why there should be any problem getting sdhc and FAT32 running. Essentially you can have a simple SPI receive and a transmit routine, then a block mode that calls that, and then the CMD and SDRD and SDWR routines that form the basis of your driver.
I think the problem seems to be in adapting fsrw when it is easier to start afresh.
It's also easier to bit-bash IMO rather than use smartpins. Take a look at the TAQOZ sources and you will see how easy it is.
+1 for what Peter said.
Or you can look at the ROM SD boot too. There is no write routine but that's not difficult as the same bottom layer routine does both read and write to the SD card combined. Works for SD, SDHC, SDXC.
Peter and Cluso's code was essential for me getting my fsrw working. It was difficult for me because.. I'm me. I hoped sharing my sd code with the community would be helpful but haven't received any feedback until now. I'll continue improving things to try to eek the last bit of performance out of the driver.
Comments
Could that be the issue?
Do your cards work with FSRW on a P1?
Thanks for everyone's help!
--Terry
The version you started with is only going to support SD, not SDHC. There's a lot of work needed to support SDHC. Right now only 24 bit address is sent, not 32 bit address required by sdhc. Minimum changes are;
pri cmd(op, parm) ' ' Send a full command sequence, and get and ' return the response. We make sure cs is low, ' send the required eight clocks, then the ' command and parameter, and then the CRC for ' the only command that needs one (the first one). ' Finally we spin until we get a result. DRVL_(cs) read send($40+op) send(parm >> 24) send(parm >> 16) send(parm >> 8) send(parm << 0) if (op == 0) send($95) else send($87) return readresp pub start_explicit(iDO, iCLK, iDI, iCS)| t, c 'chz added cmd58 for sdhc do := iDO clk := iCLK di := iDI cs := iCS c := clk outh_(cs) outh_(clk) outh_(di) dirh_(cs) dirh_(clk) dirh_(di) asm rep #.initclksout, #4800 drvnot c .initclksout getct t endasm starttime := t cmd(0, 0) drvh_(cs) ' Deselect the card to terminate a command. cmd(8, $1aa) read read read read drvh_(cs) ' Deselect the card to terminate a command. repeat cmd(55, 0) t := cmd(41, $4000_0000) drvh_(cs) ' Deselect the card to terminate a command. if t <> 1 quit if t return -40'abort -40 ' could not initialize card cmd(58, 0) sdhc := (read >> 6) & 1 read read read drvh_(cs) ' Deselect the card to terminate a command. if sdhc == 0 ' if not hc return -41 ' fail mount return sdhc +1 ' return card typeNOTE, this ONLY supports SDHC, not standard SD...
I think the problem seems to be in adapting fsrw when it is easier to start afresh.
It's also easier to bit-bash IMO rather than use smartpins. Take a look at the TAQOZ sources and you will see how easy it is.
Or you can look at the ROM SD boot too. There is no write routine but that's not difficult as the same bottom layer routine does both read and write to the SD card combined. Works for SD, SDHC, SDXC.