Ensure we only send FF during reads.

jonathanpallant · jonathanpallant · commit 71c2803856df · 2023-05-06T18:06:39.000+01:00
diff --git a/src/sdmmc.rs b/src/sdmmc.rs
@@ -295,6 +295,9 @@ where
             return Err(Error::ReadError);
         }
 
+        for b in buffer.iter_mut() {
+            *b = 0xFF;
+        }
         self.spi.transfer(buffer).map_err(|_e| Error::Transport)?;
 
         let mut crc = u16::from(self.receive()?);

Original file line number	Diff line number	Diff line change
`@@ -295,6 +295,9 @@ where`
`295`	`295`	`return Err(Error::ReadError);`
`296`	`296`	`}`
`297`	`297`
	`298`	`+ for b in buffer.iter_mut() {`
	`299`	`+ *b = 0xFF;`
	`300`	`+ }`
`298`	`301`	`self.spi.transfer(buffer).map_err(\|_e\| Error::Transport)?;`
`299`	`302`
`300`	`303`	`let mut crc = u16::from(self.receive()?);`