Alfat Sd/mmc

[eoasap]

i already soldered it onto the board. i used to have to solder parts like these on all the time, so thats not a problem. when i got the chip, there was no documentation with it, is there extra documentation with the dev board ?

[Ron Marcus]

Have you been on the user's forum website? Also, the Proton Basic is not too different from PBP. You can learn alot about timing and protocol.

[eoasap]

yes, have been on the user website for a while, but i didn't see anyone else there that used PBP. did you manually go through the proton code and change it to picbasic ? i'm sure i'd screw that up!

i really am just interested in doing some simple stuff with it for now.

[Ron Marcus]

If you have the manual, turn it to "getting started with text mode". Basically you apply power with the UART/SPI pin high.

Pause 500
low ALFAT_CTS
pauseus 20
input ALFAT_RTS
pauseus 20
low ALFAT_RESET
pause 200
input ALFAT_RESET
pause 500

main1:
serout2 ALFAT_RX,84,["RS OK",13] ; Send reset string
read:
serin2 ALFAT_TX,84,bufchar]
lcdout bufchar
if DATARDY = 1 then main2

This little code snippet resets the Alfat and reads back the startup message and version number. After that, you can send out the commands you need in a similar style to the main1: line. Wait for the responses, and use wait in your serin2 string to parse out the info you need.
Alfat is very finicky about correct syntax, so be very careful.
I would immedietly disable the echo, then change over to drive A (SD card)

Ron

[eoasap]

serin2 ALFAT_TX,84,bufchar]

there should be a '[' before bufchar, right?

do i need to declare bufchar as a byte ?

Is there a loop for the serin2 alfat_tx,84, [bufchar] ?

How do i use datardy?

I was getting errors using 'read:' also, so changed it to read1:

[Ron Marcus]

serin2 ALFAT_TX,84,bufchar]

there should be a '[' before bufchar, right?

do i need to declare bufchar as a byte ?

Is there a loop for the serin2 alfat_tx,84, [bufchar] ?

How do i use datardy?

I was getting errors using 'read:' also, so changed it to read1:

Sorry, I was doing it from memory. "READ" is a reserved word. My bad. DATARDY is a pin on Alfat. If it is high, then Alfat has data to send. It takes about ten microseconds to change states if it is empty, or transitions high. It is a flag and should be aliased as a bit variable, just as ALFAT_BUSY should.

Ron

[eoasap]

is the rest of it right? because i still can't quite get it.