From dd29e5eaf2778b944cbdb2895533522804acf42d Mon Sep 17 00:00:00 2001
From: Peter Wittich <wittich@cornell.edu>
Date: Fri, 7 Jun 2019 18:26:16 -0400
Subject: [PATCH] UART to Zynq support

---
 common/uart.c | 35 ++++++++++++++++++++++++++++++++---
 1 file changed, 32 insertions(+), 3 deletions(-)

diff --git a/common/uart.c b/common/uart.c
index cffd4d9a..e9430b3a 100644
--- a/common/uart.c
+++ b/common/uart.c
@@ -19,9 +19,10 @@
 #include "FreeRTOS.h"
 #endif // USE_FREERTOS
 
-// Initialize the UART
-// based on uart_echo demo project
-// we use UART4 (front panel)
+// Initialize the UART(s)
+// It is hard to generalize these initialization functions as they use
+// a bunch of #define's that are not iterable
+// UART4 is the front panel
 void
 UART4Init(uint32_t ui32SysClock)
 {
@@ -48,6 +49,34 @@ UART4Init(uint32_t ui32SysClock)
   return;
 }
 
+// UART1 is the Zynq
+void
+UART1Init(uint32_t ui32SysClock)
+{
+  // Turn on the UART peripheral
+  MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_UART1);
+
+
+  //
+  // Configure the UART for 115,200, 8-N-1 operation.
+  //
+  MAP_UARTConfigSetExpClk(UART1_BASE, ui32SysClock, 115200,
+                         (UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE |
+                          UART_CONFIG_PAR_NONE));
+
+  //
+  // Enable the UART interrupt.
+  //
+#ifdef USE_FREERTOS
+  IntPrioritySet( INT_UART1, configKERNEL_INTERRUPT_PRIORITY );
+#endif // USE_FREERTOS
+  MAP_IntEnable(INT_UART1);
+  MAP_UARTIntEnable(UART1_BASE, UART_INT_RX | UART_INT_RT);
+
+  return;
+}
+
+
 
 
 //*****************************************************************************