I'm presently writing the code for SAMD20 micro-controller and SDCard. I'v successfully written code for single block read and multi block successfully. I'm testing my code with San-disk 16 GB SDCard with HC-1 specs.
I'm stuck with writing the code for single block write.
I've followed following process:
Sent CMD24 command (with sector number 2001:just after first block of FAT32 FS ) Based on response started writing buffer with incremental data (0x00,0x01,0x02,0x03........) (After Sending data token 0xfe) Now after this, I'm waiting for data response (i.e. 0x05 for successful data write), which i didn't get. MISO line goes BUSY (0x00) after that and after some time, transit to high (0xff).
If I send CMD13 (arg=0x00) after this, I should get card status, but It is returning back with 0xC1 0x3F.
After reset, if I tried to read sector no. 2001. I get following results
I think this is the correct procedure for SD Card write.
Any help will be appreciated.Thanks in advance.