Merge pull request #98 from hlukasz/master

i2c: properly handle bus errors
stm32-rs · May 29, 2020 · 46b50b5 · 46b50b5
2 parents 3a9b3e4 + e263084
commit 46b50b5
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/src/i2c.rs b/src/i2c.rs
@@ -198,6 +198,12 @@ where
     }
 
     fn start_transfer(&mut self, addr: u8, len: usize, direction: RD_WRN_A, autoend : AUTOEND_A) {
+        // Ensure that TX/RX buffers are empty
+        self.i2c.isr.write(|w| w.txe().set_bit());
+        while self.i2c.isr.read().rxne().bit_is_set() {
+            self.i2c.rxdr.read();
+        };
+
         self.i2c.cr2.write(|w|
             w
                 // Start transfer