1 files changed, 125 insertions, 0 deletions
diff --git a/FreeRTOS/Demo/Safer_Interrupts_M33F_NXP_LPC55S69_MCUXpresso/Application/led_demo.c b/FreeRTOS/Demo/Safer_Interrupts_M33F_NXP_LPC55S69_MCUXpresso/Application/led_demo.c
new file mode 100644
index 000000000..34453f340
--- /dev/null
+++ b/FreeRTOS/Demo/Safer_Interrupts_M33F_NXP_LPC55S69_MCUXpresso/Application/led_demo.c
@@ -0,0 +1,125 @@
+/*
+ * 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!
+ */
+
+/* FreeRTOS includes. */
+#include "FreeRTOS.h"
+#include "task.h"
+
+/* BSP includes. */
+#include "board.h"
+
+/* Demo interface include. */
+#include "led_demo.h"
+
+/**
+ * Represents which LEDs are on or off. pdTRUE is on.
+ */
+typedef struct LedState
+{
+    BaseType_t xRed;
+    BaseType_t xGreen;
+    BaseType_t xBlue;
+} LedState_t;
+
+/* The following needs to be placed in the shared memory as it is accessed in
+ * the button pressed IRQ handler which is unprivileged. */
+static LedState_t xLedState __attribute__( ( section( "user_irq_shared_memory" ) ) );
+/*-----------------------------------------------------------*/
+
+/**
+ * @brief Turn on RGB Led according to the xLedState.
+ */
+static void prvTurnOnRgbLed( void );
+
+/**
+ * @brief Turn off RGB Led.
+ */
+static void prvTurnOffRgbLed( void );
+/*-----------------------------------------------------------*/
+
+static void prvTurnOnRgbLed( void )
+{
+    /* Setting the GPIO pin activates the color in RGB LED. */
+    if( xLedState.xRed == pdTRUE )
+    {
+        GPIO_PortClear( GPIO, BOARD_LED_RED_GPIO_PORT, 1u << BOARD_LED_RED_GPIO_PIN );
+    }
+    if( xLedState.xGreen == pdTRUE )
+    {
+        GPIO_PortClear( GPIO, BOARD_LED_GREEN_GPIO_PORT, 1u << BOARD_LED_GREEN_GPIO_PIN );
+    }
+    if( xLedState.xBlue == pdTRUE )
+    {
+        GPIO_PortClear( GPIO, BOARD_LED_BLUE_GPIO_PORT, 1u << BOARD_LED_BLUE_GPIO_PIN );
+    }
+}
+/*-----------------------------------------------------------*/
+
+static void prvTurnOffRgbLed( void )
+{
+    /* Setting the pins high turns off the LED. */
+    GPIO_PortSet( GPIO, BOARD_LED_RED_GPIO_PORT, 1u << BOARD_LED_RED_GPIO_PIN );
+    GPIO_PortSet( GPIO, BOARD_LED_GREEN_GPIO_PORT, 1u << BOARD_LED_GREEN_GPIO_PIN );
+    GPIO_PortSet( GPIO, BOARD_LED_BLUE_GPIO_PORT, 1u << BOARD_LED_BLUE_GPIO_PIN );
+}
+/*-----------------------------------------------------------*/
+
+void vLedDemoTask( void * pvParams )
+{
+    /* Set the initial LED state. */
+    xLedState.xRed = pdTRUE;
+    xLedState.xGreen = pdTRUE;
+    xLedState.xBlue = pdFALSE;
+
+    /* Silence compiler warnings about unused variables. */
+    ( void ) pvParams;
+
+    for( ;; )
+    {
+        prvTurnOnRgbLed();
+        vTaskDelay( pdMS_TO_TICKS( 1000 ) );
+
+        prvTurnOffRgbLed();
+        vTaskDelay( pdMS_TO_TICKS( 1000 ) );
+    }
+}
+/*-----------------------------------------------------------*/
+
+void vButtonPressedIRQHandler( uint32_t ulData )
+{
+    BaseType_t xPreviousRed;
+
+    /* Data is not used. */
+    ( void ) ulData;
+
+    /* Shift to the next color. */
+    xPreviousRed = xLedState.xRed;
+    xLedState.xRed = xLedState.xGreen;
+    xLedState.xGreen = xLedState.xBlue;
+    xLedState.xBlue = xPreviousRed;
+}
+/*-----------------------------------------------------------*/