The USART code still has some small bug causing a few characters of t…

…he message to get garbled very infrequently, this commit fails to fix that but I think is still the desired behaviour (otherwise memcpy is called the second time with zero length)
swift-nav · Feb 1, 2012 · b0f3a65 · b0f3a65
1 parent 3cdcefa
commit b0f3a65
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/hw/usart.c b/src/hw/usart.c
@@ -95,7 +95,7 @@ void usart_write_dma(u8 *data, u8 n)
   usart_fifo_wr = (usart_fifo_wr + n) % USART_BUFFER_LEN;
   __asm__("CPSIE i;");
 
-  if (wr + n < USART_BUFFER_LEN)
+  if (wr + n <= USART_BUFFER_LEN)
     memcpy(&usart_fifo[wr], data, n);
   else {
     /* Deal with case where write wraps the circular buffer. */