hey gang,
first i looked at arduino.cc for a mmc or sd card solution, but i didn´t found something attractive for my gps logger project.
So first i tried to get a sd card solution from Ulrich Radig
http://www.ulrichradig.de/home/index.php/avr/mmc-sd to work, but that was too difficult for a greenhorn like me to adapt to arduino.
After i read this thread the 10th time i gave it also a try.
Why must you "talk" so crypted? ;-) Only a fog of usable information was around! *ggg* Only some needed steps were explained... the ".cpp" thing and so on... but you got that to work. Would have been very helpful with a fist full of information more, but who wants a perfect world? 8-)
Okay, what was interesting for me at R.Riegel
http://www.roland-riegel.de/sd-reader/doc/index.html , that he says that you can use only the mmc part and simply leave out the fat part.
http://www.roland-riegel.de/sd-reader/sd-reader_source_20071213.zipThat´s what i did, because thats enough, i only want the data stream of the gps.nmea on a BIG 1G sd card! So i can safe for sure some points of my movement profile.
For the circuit i took the simple one from Ulrich Radig, level shifting with voltage dividers, each two resistors, works like a charme!
except for the diodes for vcc i used the 3.3V of the diecimilia. there was a reset at the first mount of the board with the sd card in the slot. so i think the FTDI chip got a reset because of a high init current >50mA? At mikrocontroller.net i read a not too small elko should help, that what i´ll add next on the hardware side. May be a 100uF? any suggestions? At the distributor reichelt.de i could read at some newer sd card, that they take a current <40mA. So this could work. Otherwise i´ll take a low drop regulator.
For the arduino i made a new folder in E:\Program Files\arduino-0010\hardware\libraries , called mmc. There i placed the following files:
sd_raw.cpp sd_raw.h sd_raw_config.hThey got easily compiled like extensively described above here.
For the first test i used the following code:
#include <sd_raw.h>
#include <sd_raw_config.h>
int incomingByte = 0; // for incoming serial data
void setup() {
Serial.begin(9600); // opens serial port, sets data rate to 9600 bps
//Initialisierung der MMC/SD-Karte
Serial.print("System Ready!\r\n");
/* setup sd card slot */
if( !sd_raw_init() )
{
Serial.println("** Keine MMC/SD Karte gefunden!! **");
}
else
{
Serial.println("Karte gefunden!!");
}
struct sd_raw_info disk_info;
Serial.print("manuf: 0x");
Serial.print( disk_info.manufacturer,HEX);
Serial.println();
Serial.print("oem: ");
Serial.print( (char*)disk_info.oem);
Serial.println();
Serial.print("prod: ");
Serial.print((char*) disk_info.product);
Serial.print("rev: ");
Serial.println(disk_info.revision);
Serial.print("serial: 0x");
Serial.print(disk_info.serial,HEX);
Serial.println();
Serial.print("date: ");
Serial.print(disk_info.manufacturing_month);
Serial.print('/');
Serial.print(disk_info.manufacturing_year);
Serial.println();
Serial.print("size: ");
Serial.print(disk_info.capacity);
Serial.println();
Serial.print("copy: ");
Serial.print(disk_info.flag_copy,BYTE);
Serial.println();
Serial.print("wr.pr.: ");
Serial.print(disk_info.flag_write_protect_temp);
Serial.print('/');
Serial.print(disk_info.flag_write_protect);
Serial.println();
Serial.print("format: ");
Serial.print(disk_info.format);
}
void loop() {
// not used for now:
}
This works (nearly), HURRAY!
Get the following output:
Binary sketch size: 4944 bytes (of a 14336 byte maximum)
System Ready!
** Keine MMC/SD Karte gefunden!! **
manuf: 0x0
oem:
prod:
rev:
serial: 0x35FF0102
date:
size: 4027073545
copy:
wr.pr.: some characters are not displayable here.
Where it says, no card found ("** Keine MMC/SD Karte gefunden!! **"), i think it would need only a bit more time for the init?
The later card information seems to be no problem.
Okay, enough for today, hopefully the read write test will follow tomorrow! I pasted the dirty code in here, so others can use the information now and not sometimes. I plan also to add future additions if time allows it. There will also follow experiences with my navilock gps modul (30?, RS232 - me fool did not take the ttl one
so i had to add a max232 .... story will continue...)
cheers!
And a big THANK YOU at all the arduino gang for doing an awesome job!