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Added support for 16 bit bus for I2CMasterBus #23

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Added support for 16 bit bus for I2CMasterBus #23

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17 changes: 16 additions & 1 deletion capsules/extra/src/bus.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -301,7 +301,21 @@ impl<'a, I: I2CDevice> Bus<'a> for I2CMasterBus<'a, I> {
}
}
}),

BusWidth::Bits16LE => self
.addr_buffer
.take()
.map_or(Err(ErrorCode::NOMEM), |buffer| {
buffer[0] = 0x00;
buffer[1] = addr as u8;
self.status.set(BusStatus::SetAddress);
match self.i2c.write(buffer, 2) {
Ok(()) => Ok(()),
Err((error, buffer)) => {
self.addr_buffer.replace(buffer);
Err(error.into())
}
}
}),
_ => Err(ErrorCode::NOSUPPORT),
}
}
Expand All @@ -315,6 +329,7 @@ impl<'a, I: I2CDevice> Bus<'a> for I2CMasterBus<'a, I> {
// endianess does not matter as the buffer is sent as is
let bytes = data_width.width_in_bytes();
self.len.set(len * bytes);

if len * bytes < 255 && buffer.len() >= len * bytes {
debug!("write len {}", len);
self.len.set(len);
Expand Down