Hello,
I have built a CMOS camera based on BF518 and a CMOS sensor, all work fine but as last develope I have written the code for enabling the SD interface.
For this work I copy the source example available with ADSP-BF518F EZ-Board. In my code the SD identification work fine but when I start a simple test of write/read doesn't work.
The program fail with the function sd_mmc_select()
Below the program log:
Card inserted
Waiting for card to be detected...
Card identification must be run at 400000Hz or less
Setting RSI clock frequency to 400000Hz
Starting card identification procedure
Sending GO_IDLE_STATE command
Starting SD Version 2.0 identification...
Sending SEND_IF_COND command for 2.7V to 3.6V compatibility
Card is compatible, likely an SD Version 2.0 compliant card...
Voltage range was accepted, checking echo back pattern...
Echo back pattern correct
Requesting OCR register...
OCR register received
Requesting OCR register...
OCR register received
Checking if card is a high capacity card...
SD Version 2.0 or later High Capacity card detected successfully!
Requesting CID register...
Requesting RCA...
RCA of 0x0001 sent from card
Requesting Card Status register...
Requesting CSD register...
Requesting SCR register...
Optimizing RSI interface speed...
SD Card transfer speed is 25000000Hz
Setting RSI clock frequency to 20000000Hz
Setting RSI bus width to 4-bit...
Requesting SSR register...
Card identification procedure completed! *pRSI_STATUS = 20a000
sd_mmc_send_command 1
R/W Test begin ...Bus width = 4, Card = 2, Er = 20a004
Error on sd_mmc_select.
*pRSI_STATUS = 20a004
I understand the complexity of it and the little information, but now they are at a standstill, between my code and the EZ-Board, there are no differences.
Where can I find some additional resources or a different testing program?
Thank you in advance.
Manuele
2016/08/11 I have found a preliminary solution by analyzing rsi.c source code for BF609, unfortunately also this code have problems with several kind of Secure Digital cards. I have a large collection of SD cards and only 10% works with this driver. I hope that ADI resolve this problem that is a severe limit for this DSP.
Manuele
