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Comment handling of RDY byte #28

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merged 2 commits into from
Feb 11, 2025
Merged

Comment handling of RDY byte #28

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06cb6ac
Comment handling of RDY byte
Feb 10, 2025
8a2bfd5
Correct formatting
Feb 11, 2025
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7 changes: 6 additions & 1 deletion src/i2c.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,8 @@ where
}

fn wait_ready(&mut self) -> Poll<Result<(), Self::Error>> {
// Wait for RDY byte to be 1
// See 6.2.4 I2C communication statement
let mut buf = [0];
if let Err(e) = self.i2c.read(I2C_ADDRESS, &mut buf) {
// It's possible that the PN532 does not ACK the read request when it is not ready.
Expand All @@ -54,7 +56,10 @@ where
fn read(&mut self, buf: &mut [u8]) -> Result<(), Self::Error> {
self.i2c.transaction(
I2C_ADDRESS,
&mut [Operation::Read(&mut [0]), Operation::Read(buf)],
&mut [
Operation::Read(&mut [0]), // Strip RDY byte off the response
Operation::Read(buf),
],
)
}
}
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