yjdwbj commented on a change in pull request #2464:
URL: https://github.com/apache/incubator-nuttx/pull/2464#discussion_r534733637
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File path: drivers/mmcsd/mmcsd_sdio.c
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@@ -2645,7 +2645,7 @@ static int mmcsd_widebus(FAR struct mmcsd_state_s *priv)
priv->widebus = true;
SDIO_CLOCK(priv->dev, CLOCK_SD_TRANSFER_4BIT);
- usleep(MMCSD_CLK_DELAY);
+ up_udelay(MMCSD_CLK_DELAY);
Review comment:
I just already to test the `nxsig_usleep` as your mention to using. But
the result of is hanging like to using the `usleep`.
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