From fb3d6549b82358e688ee869a9673aa7a021ebee2 Mon Sep 17 00:00:00 2001
From: LorenzoRai <lorenzo.rai@siemens.com>
Date: Wed, 14 Jun 2023 15:43:03 +0200
Subject: [PATCH] Add support for RTT UART

---
 script/build       | 14 +++++++++++++-
 script/test        |  9 +++++++++
 src/CMakeLists.txt | 16 ++++++++++------
 src/src/system.c   |  5 +++++
 4 files changed, 37 insertions(+), 7 deletions(-)

diff --git a/script/build b/script/build
index c6ce6e0a..d4d4e1f2 100755
--- a/script/build
+++ b/script/build
@@ -34,7 +34,7 @@ OT_CMAKE_NINJA_TARGET=${OT_CMAKE_NINJA_TARGET:-}
 NRF_PLATFORMS=(nrf52811 nrf52833 nrf52840)
 readonly NRF_PLATFORMS
 
-NRF_BUILD_TYPES=(UART_trans USB_trans SPI_trans_NCP soft_crypto soft_crypto_threading)
+NRF_BUILD_TYPES=(UART_trans USB_trans SPI_trans_NCP RTT_trans soft_crypto soft_crypto_threading)
 readonly NRF_BUILD_TYPES
 
 OT_SRCDIR="$(pwd)"
@@ -107,6 +107,10 @@ main()
                     OT_CMAKE_NINJA_TARGET=("ot-ncp-mtd" "ot-rcp")
                     options+=("${local_options[@]}" "-DOT_NCP_SPI=ON")
                     ;;
+                RTT_trans)
+                    OT_CMAKE_NINJA_TARGET=("ot-cli-mtd" "ot-rcp")
+                    options+=("${local_options[@]}" "-DOT_RTT_UART=ON")
+                    ;;
             esac
             ;;
         nrf52833)
@@ -122,6 +126,10 @@ main()
                     OT_CMAKE_NINJA_TARGET=("ot-ncp-ftd" "ot-ncp-mtd" "ot-rcp")
                     options+=("${local_options[@]}" "-DOT_NCP_SPI=ON")
                     ;;
+                RTT_trans)
+                    OT_CMAKE_NINJA_TARGET=("ot-cli-ftd" "ot-cli-mtd" "ot-rcp")
+                    options+=("${local_options[@]}" "-DOT_RTT_UART=ON")
+                    ;;
             esac
             ;;
         nrf52840)
@@ -137,6 +145,10 @@ main()
                     OT_CMAKE_NINJA_TARGET=("ot-ncp-ftd" "ot-ncp-mtd" "ot-rcp")
                     options+=("${local_options[@]}" "-DOT_NCP_SPI=ON" "-DOT_EXTERNAL_MBEDTLS=nordicsemi-mbedtls")
                     ;;
+                RTT_trans)
+                    OT_CMAKE_NINJA_TARGET=("ot-cli-ftd" "ot-cli-mtd" "ot-rcp")
+                    options+=("${local_options[@]}" "-DOT_RTT_UART=ON" "-DOT_EXTERNAL_MBEDTLS=nordicsemi-mbedtls")
+                    ;;
                 soft_crypto)
                     options+=("${local_options[@]}")
                     ;;
diff --git a/script/test b/script/test
index 935d0c06..aebe9d4a 100755
--- a/script/test
+++ b/script/test
@@ -68,6 +68,15 @@ main()
     rm -rf "$OT_BUILDDIR"
     "$(dirname "$0")"/build nrf52840 SPI_trans_NCP "${OT_OPTIONS[@]}"
 
+    rm -rf "$OT_BUILDDIR"
+    "$(dirname "$0")"/build nrf52811 RTT_trans "${OT_OPTIONS[@]}"
+
+    rm -rf "$OT_BUILDDIR"
+    "$(dirname "$0")"/build nrf52833 RTT_trans "${OT_OPTIONS[@]}"
+
+    rm -rf "$OT_BUILDDIR"
+    "$(dirname "$0")"/build nrf52840 RTT_trans "${OT_OPTIONS[@]}"
+
     rm -rf "$OT_BUILDDIR"
     "$(dirname "$0")"/build nrf52840 soft_crypto "${OT_OPTIONS[@]}"
 
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index f3857a0a..c726380a 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -26,14 +26,18 @@
 #  POSSIBILITY OF SUCH DAMAGE.
 #
 
-if(OT_NCP_SPI)
-    list(APPEND OT_PLATFORM_DEFINES "SPIS_AS_SERIAL_TRANSPORT=1")
+if(OT_RTT_UART)
+    list(APPEND OT_PLATFORM_DEFINES "OPENTHREAD_UART_RTT_ENABLE=1")
 else()
-    option(OT_USB "enable nrf USB as serial transport support")
-    if(OT_USB)
-        list(APPEND OT_PLATFORM_DEFINES "USB_CDC_AS_SERIAL_TRANSPORT=1")
+    if(OT_NCP_SPI)
+        list(APPEND OT_PLATFORM_DEFINES "SPIS_AS_SERIAL_TRANSPORT=1")
     else()
-        list(APPEND OT_PLATFORM_DEFINES "UART_AS_SERIAL_TRANSPORT=1")
+        option(OT_USB "enable nrf USB as serial transport support")
+        if(OT_USB)
+            list(APPEND OT_PLATFORM_DEFINES "USB_CDC_AS_SERIAL_TRANSPORT=1")
+        else()
+            list(APPEND OT_PLATFORM_DEFINES "UART_AS_SERIAL_TRANSPORT=1")
+        endif()
     endif()
 endif()
 
diff --git a/src/src/system.c b/src/src/system.c
index 0e49c447..c8cc957f 100644
--- a/src/src/system.c
+++ b/src/src/system.c
@@ -46,6 +46,8 @@
 
 #include <openthread/config.h>
 
+#include <utils/uart_rtt.h>
+
 #if !OPENTHREAD_CONFIG_ENABLE_BUILTIN_MBEDTLS_MANAGEMENT && PLATFORM_OPENTHREAD_VANILLA
 
 #include <mbedtls/platform.h>
@@ -139,6 +141,9 @@ bool otSysPseudoResetWasRequested(void)
 
 void otSysProcessDrivers(otInstance *aInstance)
 {
+#if OPENTHREAD_UART_RTT_ENABLE
+    utilsUartRttUpdate();
+#endif
     nrf5RadioProcess(aInstance);
     nrf5TransportProcess();
     nrf5TempProcess();