commit 3aa0d547405ee4db6f0069f014f4d4ceabfc75e9
author Brian Silverman <brians> Sat Jan 25 17:16:43 2014 -0800
committer Brian Silverman <brians> Sat Jan 25 17:16:43 2014 -0800
tree 5af1b7f8dfd3413c0558cb58362674dabd043a34
parent 47819ab8820088be061f138dfe0f647e942b392c

started working on automatically downloading cape code

bbb_cape/src/cape/uart_byte.c

diff --git a/bbb_cape/src/cape/uart_byte.c b/bbb_cape/src/cape/uart_byte.c
index cfcf1bf..2cd95b4 100644
--- a/bbb_cape/src/cape/uart_byte.c
+++ b/bbb_cape/src/cape/uart_byte.c
@@ -24,8 +24,15 @@
     }
   }
 
+  int r = UART->DR;  // do it now to clear interrupts etc
+
+  if (UART->SR & USART_SR_PE) r = -2;
+  if (UART->SR & USART_SR_FE) r = -3;
+  if (UART->SR & USART_SR_NE) r = -4;
+  if (UART->SR & USART_SR_ORE) r = -5;
+
   TIMEOUT_TIM->CR1 &= ~TIM_CR1_CEN;
-  return UART->DR;
+  return r;
 }
 
 void uart_byte_send(uint8_t value) {