Made changes to get logs on uart port

Author: arun-silabs

examples/platform/silabs/SiWx917/BUILD.gn

@@ -241,6 +241,10 @@ source_set("siwx917-common") {
     public_deps += [ "${chip_root}/examples/common/QRCode" ]
   }
 
+  if (sl_uart_log_output) {
+    sources += [ "${silabs_common_plat_dir}/SiWx917/uart.cpp" ]
+  }
+
   if (enable_heap_monitoring) {
     sources += [ "${silabs_common_plat_dir}/MemMonitoring.cpp" ]
   }

src/platform/silabs/Logging.cpp

@@ -55,6 +55,7 @@
 #endif
 
 #if SILABS_LOG_OUT_UART
+#include "rsi_debug.h"
 #include "uart.h"
 #endif
 
@@ -135,12 +136,18 @@ static void PrintLog(const char * msg)
         sz = strlen(msg);
 
 #if SILABS_LOG_OUT_UART
-        uartLogWrite(msg, sz);
+        for (/* Empty */; sz != 0; --sz)
+        {
+            Board_UARTPutChar(*msg++);
+        }
+        // To print next log in new line with proper formatting
+        Board_UARTPutChar('\r');
+        Board_UARTPutChar('\n');
 #elif PW_RPC_ENABLED
         PigweedLogger::putString(msg, sz);
 #else
         SEGGER_RTT_WriteNoLock(LOG_RTT_BUFFER_INDEX, msg, sz);
-#endif
+#endif // SILABS_LOG_OUT_UART
 
 #if SILABS_LOG_OUT_RTT || PW_RPC_ENABLED
         const char * newline = "\r\n";

third_party/silabs/SiWx917_sdk.gni

@@ -282,6 +282,13 @@ template("siwx917_sdk") {
       }
     }
 
+    if (sl_uart_log_output) {
+      defines += [
+        "SILABS_LOG_OUT_UART=1",
+        "SILABS_LOG_OUT_RTT=0",
+      ]
+    }
+
     if (chip_build_libshell) {  # matter shell
       defines += [ "ENABLE_CHIP_SHELL" ]
     }