14. Sdio_sdcard_dma

14.1. Function description:

The demo is that SDCard writes data to SDCard and then reads data from it via dma 1/4-line mode.

14.2. Test result:

If the data of SDCard received is equal to SDCard transmitted, print the corresponding correct string, if not print the fail one.

14.3. IO connection:

PAD	PAD
pad_sdion_sdclk	sdcard_clk
pad_sdion_sdcmd	sdcard_cmd
pad_sdion_sddat0	sdcard_dat0
pad_sdion_sddat1	sdcard_dat1
pad_sdion_sddat2	sdcard_dat2
pad_sdion_sddat3	sdcard_dat3

Note

• The ‘n’ in “sdion” indicate the peripheral number.

• 1/4 line and cpu/dma mode is configurable.