rtucker85 commented on code in PR #6062:
URL: https://github.com/apache/incubator-nuttx/pull/6062#discussion_r850344894
##########
arch/arm/src/sam34/sam_hsmci.c:
##########
@@ -1800,6 +1802,9 @@ static int sam_sendcmd(FAR struct sdio_dev_s *dev,
cmd, arg, regval);
putreg32(regval, SAM_HSMCI_CMDR);
sam_cmdsample1(SAMPLENDX_AFTER_CMDR);
+
+ nxsig_usleep(10);
Review Comment:
In my testing, without the delay, card initialisation was unsuccessful.
Card initialisation is successful when mcinfo is turned on. This is because
of the added execution time to run mcinfo @ line 1801.
Inserting the delay replicates this behaviour.
It appears the timing between sam_sendcmd and sam_waitresponse is too short.
Happy to investigate better ways to achieve this if you wish?
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