Don't consider a prior I2C NACK to indicate the bus to be busy (betaf…

…light#13917)
HThuren · Sep 22, 2024 · c0c24d7 · c0c24d7
1 parent a6d70be
commit c0c24d7
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/main/drivers/mcu/at32/bus_i2c_atbsp.c b/src/main/drivers/mcu/at32/bus_i2c_atbsp.c
@@ -245,7 +245,8 @@ bool i2cBusy(I2CDevice device, bool *error)
         *error = pHandle->error_code;
     }
 
-    if (pHandle->error_code == I2C_OK) {
+    // I2C_ERR_ACKFAIL indicates that the last access wasn't acknowledged, but doesn't mean the bus is busy
+    if ((pHandle->error_code == I2C_OK) || (pHandle->error_code == I2C_ERR_ACKFAIL)) {
         if (i2c_flag_get(pHandle->i2cx, I2C_BUSYF_FLAG) == SET) {
             return true;
         }