Some success with writeCID

Using Arduino Networking, Protocols, and Devices
8

Thanks fat16lib for the reply.

OK I understand that I need to be careful when writing to CSD as PERM_WRITE_PROTECT will make my SD unusable (unless I have anything useful for reading). My query is how do I use CMD27.

I can use SD2Card cardCommand(27, 0) and get the response. How do I write the data that goes into the register?

if (ret = cardCommand(27, 0))
{
Serial.print("CMD27 failed :");
Serial.println(ret, HEX);
return false;
}
else
Serial.println("CMD27 worked");

spiSend(data1); // send 1st byte
spiSend(data2); // send 2nd byte
spiSend(data3);
...
spiSend(datan);

Will this work ? Doesn't want to try this and ruin the card.

Thanks again
Harshana