yjdwbj opened a new pull request #2464:
URL: https://github.com/apache/incubator-nuttx/pull/2464
Fixed: SDIO Interface hanging after inserted SD Card.
## Summary
Added: MT29F2G Nand Flash block driver for sam4s-xplained-pro.
Fixed: SDIO Interface hanging after inserted SD Card.
The originally `sam4s-xplained-pro:nsh` can running a `nsh shell` if have
no SD Card inserted. But reboot every 5s. No driver for the MT29F2G on board.
About the SD Card hanging problem . _Originally posted by @yjdwbj in
https://github.com/apache/incubator-nuttx/issues/2276#issuecomment-735631494_ .
I found a suspicious function `usleep(MMCSD_CLK_DELAY)` at
`mmcsd/mmcsd_sdio.c:2780` and `mmcsd/mmcsd_sdio.c:2648`. Then I changed
`up_udelay(MMCSD_CLK_DELAY)` replace to `usleep(MMCSD_CLK_DELAY)`, the hanging
problem has gone.
According to the `MT29F2G Data Sheet` and the
`Atmel-11100K-ATARM-SAM4S-Datasheet_09-Jun-15.pdf` write the driver for the
MTD interface. But the `mkfatfs` can only format it as `FAT16` not `FAT32`. I
would love to know that someone who have the same `sam4s-xplained-pro` board to
testing SD Card and Nand flash. If you have one and use these driver function ,
please give me a feedback.
## Impact
## Testing
```sh
nsh> df
Block Number
Size Blocks Used Available Mounted on
16384 15611 2100 13511 /fat
0 0 0 0 /proc
nsh> mount -t vfat /dev/mtdblock0 /flash
nsh> df
Block Number
Size Blocks Used Available Mounted on
16384 15611 2100 13511 /fat
65536 4095 3 4092 /flash
0 0 0 0 /proc
nsh> cat /flash/test.txt
NuttX 10.0.0 9315fe21ed-dirty Dec 2 2020 21:24:31 arm sam4s-xplained-pro
```
hexdump context
```sh
nsh> hexdump /dev/mtdblock0 count=256
/dev/mtdblock0 at 00000000:
0000: eb 3c 90 4e 55 54 54 58 20 20 20 00 08 20 01 00 .<.NUTTX .. ..
0010: 02 00 02 00 00 f8 05 00 3f 00 ff 00 00 00 00 00 ........?.......
0020: 00 00 02 00 00 00 29 00 00 00 00 20 20 20 20 20 ......)....
0030: 20 20 20 20 20 20 46 41 54 31 36 20 20 20 0e 1f FAT16 ..
0040: be 5b 7c ac 22 c0 74 0b 56 b4 0e bb 07 00 cd 10 .[|.".t.V.......
0050: 5e eb f0 32 e4 cd 16 cd 19 eb fe 54 68 69 73 20 ^..2.......This
0060: 69 73 20 6e 6f 74 20 61 20 62 6f 6f 74 61 62 6c is not a bootabl
0070: 65 20 64 69 73 6b 2e 20 20 50 6c 65 61 73 65 20 e disk. Please
0080: 69 6e 73 65 72 74 20 61 20 62 6f 6f 74 61 62 6c insert a bootabl
0090: 65 20 66 6c 6f 70 70 79 20 61 6e 64 0d 0a 70 72 e floppy and..pr
00a0: 65 73 73 20 61 6e 79 20 6b 65 79 20 74 6f 20 74 ess any key to t
00b0: 72 79 20 61 67 61 69 6e 20 2e 2e 2e 0d 0a 00 00 ry again .......
00c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
```
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