Fix for occasional write hangs

RetiredWizard · web-flow · commit 52163b081ad9 · 2022-11-18T17:35:11.000-05:00
I believe the write hangs were happening because the SD card wasn't ready for the end block write command. This adds a _wait_for_ready call before the command is sent.
diff --git a/adafruit_sdcard.py b/adafruit_sdcard.py
@@ -500,6 +500,7 @@ def writeblocks(self, start_block: int, buf: ReadableBuffer) -> int:
                     )
                     offset += 512
                     nblocks -= 1
+                self._wait_for_ready(card)
                 self._cmd_nodata(card, _TOKEN_STOP_TRAN, 0x0)
         return 0
 

Original file line number	Diff line number	Diff line change
`@@ -500,6 +500,7 @@ def writeblocks(self, start_block: int, buf: ReadableBuffer) -> int:`
`500`	`500`	`)`
`501`	`501`	`offset += 512`
`502`	`502`	`nblocks -= 1`
	`503`	`+ self._wait_for_ready(card)`
`503`	`504`	`self._cmd_nodata(card, _TOKEN_STOP_TRAN, 0x0)`
`504`	`505`	`return 0`
`505`	`506`