Guten Tag Ich arbeite momentan mit SD Karten und versuche von diesen zu lesen. Leider klappt dies nicht. Die Initialisierung der Karten klappt erfolgreich, das Lesen (CMD17) hingegen nicht. Die SD Karte sendet mir zwar beim CMD 17 das Data Token 0xFE anschliessend folgen aber keine Daten, sondern nur 0en, obwohl an Adresse 0x00 laut PC Daten vorhanden sind. Angesteuert wird das ganze mit einem Pic 18F4520. Weiss jemand, warum die Karte mir keine Daten sendet? Gruss Schmidi
Servus, deine Infos reichen wohl kaum um eine Diagnose zu stellen. Ist so à la: "Mein Motor vom Audi ist kaputt was soll ich machen ?" 1) Schaltplan 2) Source + welcher Compiler? CC5/MicrochipC/Assembler/Mikroe ? 3) andere SD-Karte ausprobiert? 4) Config-Word(s)
Hallo Nun hier sind noch die gewünschten Daten. Der Schaltplan ist hier zu finden: http://lukileu.bpla ced.net/SD/Schema.pdf Der Sourcecode ist hier zu finden (CCS C Compiler): http://lukileu.bpla ced.net/SD/sd.h Diverese SD Karten wurden schon ausprobiert (128 MB, 256 MB, 512 MB 1GB). Es tritt bei allen derselbe Fehler aus. Ich hoffe ihr könnt mir helfen.
So ich habe e nun geschafft, dass mir die SD-Karte etwas liefert. Aller dings stimmt dies nicht mit dem überrein, was der PC aussagt: PC: Offset 0 1 2 3 4 5 6 7 8 9 A B C D E F 00 EB 00 90 20 20 20 20 20 20 20 20 00 02 20 01 00 ë 10 02 00 02 00 00 F8 3D 00 20 00 10 00 65 00 00 00 ø= e 20 9B 89 07 00 80 00 29 0C C3 C9 68 4E 4F 20 4E 41 ›‰ € ) ÃÉhNO NA 30 4D 45 20 20 20 20 46 41 54 31 36 20 20 20 00 00 ME FAT16 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 90 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 A0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 B0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 90 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 A0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 B0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 AA Uª PIC: Address 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F ASCII 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 30 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 90 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ A0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ B0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 30 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 90 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ A0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ B0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 ........ ........ C0 06 00 06 0F E0 C4 65 00 00 00 9B 89 07 00 00 00 ......e. ........ D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 AA ........ ......U. Dies sind die Daten, für die ersten 512 Bytes. Hat jemand eine Ahnung, warum die SD-Karte ertwas anderes ausgibt? Die zwei letzten Bytes stimmen ja wieder (55 AA). Gruss Schmidi
Hallo, dein AVR liest dir den pysikalischen Block 0 der Karte aus, der PC den Block 0 der des Volume Boot Record. Dessen Blocknummer steht im Block 0 ab Byte 0x01C6. Sascha
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