1nv1 / ulibsd Goto Github PK

I'm in the process of porting this code to an stm32 microcontroller, and have discovered some issues.

Firstly, I'm using an 8GB SDHC card. It initialises fine, but the number of sectors is all wrong. I think your formula may be implemented incorrectly under __SD_Sectors for SDHC type cards.
The correct answer for an 8GB SDHC card is C_SIZE of 15070 * 1024 = 15,431,680, but your code performs C_SIZE of 15070 * (2^2) / 512 = 117, which is nowhere near correct.

The second issue is that when receiving/transmitting data to an SDHC card, the addresses are sector addresses, not byte addresses.
Thus, the line under read/write_data

 // Convert sector number to byte address (sector * SD_BLK_SIZE)
    if (__SD_Send_Cmd(CMD17, sector * SD_BLK_SIZE) == 0) {

is not true for SDHC cards, and should have the *SD_BLK_SIZE removed.

This is as far as I have got so far, and will update when I know more.

Which license does apply for this project?
It would be best to add a LICENSE file.