From 18a3f03c06c65d79e5c4b7ac1076077c4b9fd8ff Mon Sep 17 00:00:00 2001
From: Nick Foster <nick@ettus.com>
Date: Thu, 8 Sep 2011 16:42:21 -0700
Subject: ZPU/USRP2: first stab at UDP UART firmware

---
 firmware/zpu/apps/txrx_uhd.c    | 19 ++++++++++++++++++-
 firmware/zpu/lib/CMakeLists.txt |  1 +
 firmware/zpu/lib/net_common.c   |  2 +-
 3 files changed, 20 insertions(+), 2 deletions(-)

(limited to 'firmware')

diff --git a/firmware/zpu/apps/txrx_uhd.c b/firmware/zpu/apps/txrx_uhd.c
index dfb484bc5..9d0a28b58 100644
--- a/firmware/zpu/apps/txrx_uhd.c
+++ b/firmware/zpu/apps/txrx_uhd.c
@@ -32,6 +32,7 @@
 #include "usrp2/fw_common.h"
 #include "udp_fw_update.h"
 #include "pkt_ctrl.h"
+#include "udp_uart.h"
 
 //standard headers
 #include <stddef.h>
@@ -71,6 +72,12 @@ static void handle_udp_data_packet(
         sr_tx_ctrl->cyc_per_up = 0;
         break;
 
+    case USRP2_UDP_UART_BASE_PORT+0:
+    case USRP2_UDP_UART_BASE_PORT+1:
+    case USRP2_UDP_UART_BASE_PORT+2:
+        turn_off_uart(src.port-USRP2_UDP_UART_BASE_PORT);
+        break;
+
     default: return;
     }
 
@@ -223,6 +230,7 @@ static void handle_udp_ctrl_packet(
     /*******************************************************************
      * UART Control
      ******************************************************************/
+/*
     case USRP2_CTRL_ID_SO_LIKE_CAN_YOU_READ_THIS_UART_BRO:{
       //executes a readline()-style read, up to num_bytes long, up to and including newline
       int num_bytes = ctrl_data_in->data.uart_args.bytes;
@@ -244,7 +252,7 @@ static void handle_udp_ctrl_packet(
       ctrl_data_out.data.uart_args.bytes = num_bytes;
       break;
     }
-
+*/
     /*******************************************************************
      * Echo test
      ******************************************************************/
@@ -336,8 +344,12 @@ main(void)
   register_udp_listener(USRP2_UDP_RX_DSP0_PORT, handle_udp_data_packet);
   register_udp_listener(USRP2_UDP_RX_DSP1_PORT, handle_udp_data_packet);
   register_udp_listener(USRP2_UDP_TX_DSP0_PORT, handle_udp_data_packet);
+  
 #ifdef USRP2P
   register_udp_listener(USRP2_UDP_UPDATE_PORT, handle_udp_fw_update_packet);
+  int i;
+  for(i=0; i<NUM_UARTS; i++)
+    register_udp_listener(USRP2_UDP_UART_BASE_PORT+i, handle_uart_data_packet);
 #endif
 
   //3) set the routing mode to slave to set defaults
@@ -356,6 +368,11 @@ main(void)
         pkt_ctrl_release_incoming_buffer();
     }
 
+#ifdef USRP2P
+    //look for incoming data on the four UARTs and handle it
+    poll_uarts();
+#endif
+
     pic_interrupt_handler();
     /*
     int pending = pic_regs->pending;		// poll for under or overrun
diff --git a/firmware/zpu/lib/CMakeLists.txt b/firmware/zpu/lib/CMakeLists.txt
index 193d63cfa..ce6b7fa44 100644
--- a/firmware/zpu/lib/CMakeLists.txt
+++ b/firmware/zpu/lib/CMakeLists.txt
@@ -44,4 +44,5 @@ SET(COMMON_SRCS
     ${CMAKE_SOURCE_DIR}/lib/net_common.c
     ${CMAKE_SOURCE_DIR}/lib/arp_cache.c
     ${CMAKE_SOURCE_DIR}/lib/banal.c
+    ${CMAKE_SOURCE_DIR}/lib/udp_uart.c
 )
diff --git a/firmware/zpu/lib/net_common.c b/firmware/zpu/lib/net_common.c
index 9a3f8c5a5..698ed97f4 100644
--- a/firmware/zpu/lib/net_common.c
+++ b/firmware/zpu/lib/net_common.c
@@ -42,7 +42,7 @@
 static const bool debug = false;
 static const size_t out_buff_size = 2048;
 static const eth_mac_addr_t BCAST_MAC_ADDR = {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}};
-#define MAX_UDP_LISTENERS 6
+#define MAX_UDP_LISTENERS 10
 
 /***********************************************************************
  * 16-bit one's complement sum
-- 
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