git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1506 35acf78f-673a-0410-8e92-d51de3d6d3f4

1 files changed, 5 insertions, 4 deletions

diff --git a/os/hal/platforms/LPC214x/serial_lld.h b/os/hal/platforms/LPC214x/serial_lld.h
index 034a707fb..67e7e27d0 100644
--- a/os/hal/platforms/LPC214x/serial_lld.h
+++ b/os/hal/platforms/LPC214x/serial_lld.h
@@ -59,13 +59,10 @@
  * @brief FIFO preload parameter.

  * @details Configuration parameter, this values defines how many bytes are

  * preloaded in the HW transmit FIFO for each interrupt, the maximum value is

- * 16 the minimum is 2, the value 0 disables the feature.

+ * 16 the minimum is 1.

  * @note An high value reduces the number of interrupts generated but can

  *       also increase the worst case interrupt response time because the

  *       preload loops.

- * @note The value zero disables the feature and reverts to a simpler code

- *       that will generate an interrupt for each output byte but is much

- *       smaller and simpler.

  */

 #if !defined(UART_FIFO_PRELOAD) || defined(__DOXYGEN__)

 #define LPC214x_UART_FIFO_PRELOAD   16

@@ -89,6 +86,10 @@
 /* Derived constants and error checks.                                       */

 /*===========================================================================*/

 

+#if (LPC214x_UART_FIFO_PRELOAD < 1) || (LPC214x_UART_FIFO_PRELOAD > 16)

+#error "invalid LPC214x_UART_FIFO_PRELOAD setting"

+#endif

+

 /*===========================================================================*/

 /* Driver data structures and types.                                         */

 /*===========================================================================*/