2009-03-04 10:06 PM
SDIO how to transfer data
2011-05-17 04:05 AM
Hello,
I try to transfer data from the STM32 to a SDIO device. I can successfully read and write register on my SDIO device using the command 52. This command use only the CMD line. But to transfer data, I should send a command 53 on the CMD line. And the data should be transfered on D[3:0] line. I manage to send the command 53, but I have no data transferred on D[3:0]. Does anybody know how to transfer data on this line D[3:0]? Thanks in advance.2011-05-17 04:05 AM
Please tell us which device you're trying to talk to. We'll try to acquire & duplicate your tests...
2011-05-17 04:05 AM
The device plugged is a WLAN Marvell 8686.
Basically to send data on this device, I have to send the command 53 to put the Marvell in receive block mode. That s working, the command 53 is properly sent on the command line, and the Marvell replies Ready to receive. But the data have to be sent on data lines D[3:0]. And here is the problem, nothing happen on these lines. I tried to store the data on the SDIO FIFO but doesn t resolve the problem. What I m looking for is an example on how send data on these lines. Thanks in advance