Diff: targets/cmsis/TARGET_STM/TARGET_NUCLEO_F030R8/cmsis_nvic.c

Revision:

76:aeb1df146756

Child:

77:b5886236e6f0

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/cmsis/TARGET_STM/TARGET_NUCLEO_F030R8/cmsis_nvic.c	Mon Jan 27 14:30:07 2014 +0000
@@ -0,0 +1,60 @@
+/* mbed Microcontroller Library
+ * CMSIS-style functionality to support dynamic vectors
+ *******************************************************************************
+ * Copyright (c) 2014, STMicroelectronics
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *******************************************************************************
+ */ 
+#include "cmsis_nvic.h"
+
+#define NVIC_RAM_VECTOR_ADDRESS   (0x20000000)  // Vectors positioned at start of RAM
+#define NVIC_FLASH_VECTOR_ADDRESS (0x08000000)  // Initial vector position in flash
+
+static unsigned char vtor_remap = 0; // To keep track that the vectors remap is done
+
+void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
+    int i;
+    // Space for dynamic vectors, initialised to allocate in R/W
+    static volatile uint32_t* vectors = (uint32_t *)NVIC_RAM_VECTOR_ADDRESS;
+    
+    // Copy and switch to dynamic vectors if first time called
+    if (vtor_remap == 0) {
+      uint32_t *old_vectors = (uint32_t *)NVIC_FLASH_VECTOR_ADDRESS;
+      for (i = 0; i < NVIC_NUM_VECTORS; i++) {    
+          vectors[i] = old_vectors[i];
+      }
+      vtor_remap = 1; // The vectors remap is done
+    }
+
+    // Set the vector
+    vectors[IRQn + 16] = vector;
+}
+
+uint32_t NVIC_GetVector(IRQn_Type IRQn) {
+    uint32_t *vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
+    // Return the vector
+    return vectors[IRQn + 16];
+}