1 files changed, 110 insertions, 0 deletions
diff --git a/FreeRTOS/Demo/Safer_Interrupts_M33F_NXP_LPC55S69_MCUXpresso/Application/uart_demo.c b/FreeRTOS/Demo/Safer_Interrupts_M33F_NXP_LPC55S69_MCUXpresso/Application/uart_demo.c
new file mode 100644
index 000000000..162feed19
--- /dev/null
+++ b/FreeRTOS/Demo/Safer_Interrupts_M33F_NXP_LPC55S69_MCUXpresso/Application/uart_demo.c
@@ -0,0 +1,110 @@
+/*
+ * FreeRTOS V202107.00
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://www.FreeRTOS.org
+ * http://aws.amazon.com/freertos
+ *
+ * 1 tab == 4 spaces!
+ */
+
+/* Standard includes. */
+#include <stdio.h>
+
+/* FreeRTOS includes. */
+#include "FreeRTOS.h"
+#include "task.h"
+
+#include "board.h"
+#include "fsl_usart.h"
+
+/* Demo interface include. */
+#include "uart_demo.h"
+
+/**
+ * @brief The command menu presented to the user.
+ */
+#define UART_COMMAND_MENU           "\r\nChoose one of the following:\r\n" \
+                                    "1. Get current tick count.\r\n"       \
+                                    "2. Get number of tasks.\r\n"
+#define UART_COMMAND_MENU_LEN       ( sizeof( UART_COMMAND_MENU ) - 1 )
+
+/**
+ * @brief Prompt for the user input.
+ */
+#define UART_PROMPT_STR             "> "
+#define UART_PROMPT_STR_LEN         ( sizeof( UART_PROMPT_STR ) - 1 )
+
+/**
+ * @brief Valid commands entered by the user.
+ */
+#define GET_TICK_COUNT_COMMAND      49 /* ASCII code for char '1'. */
+#define GET_NUM_TASKS_COMMAND       50 /* ASCII code for char '2'. */
+
+/**
+ * @brief Length of the buffer used for the response.
+ */
+#define UART_RESPONSE_BUF_LEN      ( 32 )
+/*-----------------------------------------------------------*/
+
+/* The following needs to be placed in the shared memory as it is accessed in
+ * the UART received IRQ handler which is unprivileged. */
+TaskHandle_t xUartDemoTaskHandle __attribute__( ( section( "user_irq_shared_memory" ) ) );
+/*-----------------------------------------------------------*/
+
+void vUartDemoTask( void * pvParams )
+{
+    /* Silence compiler warnings about unused variables. */
+    ( void ) pvParams;
+
+    for( ;; )
+    {
+        USART_WriteBlocking( USART0, UART_COMMAND_MENU, UART_COMMAND_MENU_LEN );
+        USART_WriteBlocking( USART0, UART_PROMPT_STR, UART_PROMPT_STR_LEN );
+
+        ulTaskNotifyTake( pdFALSE, portMAX_DELAY );
+    }
+}
+/*-----------------------------------------------------------*/
+
+void vUartDataReceivedIRQHandler( uint32_t ulData )
+{
+    char response[ UART_RESPONSE_BUF_LEN ];
+
+    if( ulData == GET_TICK_COUNT_COMMAND )
+    {
+        TickType_t xTickCount = xTaskGetTickCount();
+        snprintf( response, sizeof( response ), "%c\r\nTick Count: %u\r\n", ( char ) ulData, xTickCount );
+    }
+    else if( ulData == GET_NUM_TASKS_COMMAND )
+    {
+        UBaseType_t xTaskCount = uxTaskGetNumberOfTasks();
+        snprintf( response, sizeof( response ), "%c\r\nTask Count: %u\r\n", ( char ) ulData, xTaskCount );
+    }
+    else
+    {
+        snprintf( response, sizeof( response ), "\r\nInvalid command: %c.\r\n", ( char ) ulData );
+    }
+
+    /* Print the response and unblock the UART demo task. */
+    USART_WriteBlocking( USART0, response, strlen( response ) );
+    xTaskNotifyGive( xUartDemoTaskHandle );
+}
+/*-----------------------------------------------------------*/