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SAM3/4 SPI phase control (CPHA) is inverted

This commit is contained in:
Gregory Nutt 2013-06-18 09:29:55 -06:00
parent 7a9d4058f5
commit a2db1035dc
1 changed files with 15 additions and 5 deletions
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20
configs/sam4l-xplained/README.txt
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@ -739,8 +739,18 @@ Configuration sub-directories
an 'unsigned long int'. If this error occurs, then you may need to
toggle the value of CONFIG_CXX_NEWLONG.
STATUS: As of 2013-6-16, the microSD slot on the I/O1 is not working.
This could be an SPI communication issues, but it appears more like
a card interfacing problems. The card does make some appropriate
responses but also reports some other issues (erase reset) and will
not exit IDLE most.
STATUS: As of 2013-6-18, the microSD slot on the I/O1 is marginally
functional but needs more TLC. It seems to behave poorly when
debug output is enabled -- know idea why. And writing to the SD card
does not work. Here is some example of the bad write behavior:
NuttShell (NSH) NuttX-6.28
nsh> mount -t vfat /dev/mmcsd0 /mnt/stuff
nsh> ls /mnt/stuff
/mnt/stuff:
sharmanto.txt
nsh> cat /mnt/stuff/sharmanto.txt
Hi, from Sharmanto
nsh> echo "This is a test" >/mnt/stuff/atest.txt
nsh> ls /mnt/stuff
/mnt/stuff: