Diff: targets/cmsis/TARGET_ARM_SSG/TARGET_IOTSS_BEID/cmsis_nvic.c

Revision:

80:bdf1132a57cf

diff -r 7f02dc905b68 -r bdf1132a57cf targets/cmsis/TARGET_ARM_SSG/TARGET_IOTSS_BEID/cmsis_nvic.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/cmsis/TARGET_ARM_SSG/TARGET_IOTSS_BEID/cmsis_nvic.c	Wed Mar 02 14:30:11 2016 +0000
@@ -0,0 +1,58 @@
+/* MPS2 CMSIS Library
+*
+* Copyright (c) 2006-2016 ARM Limited
+* 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 the copyright holder 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.
+*******************************************************************************
+* CMSIS-style functionality to support dynamic vectors
+*******************************************************************************/
+#include "cmsis_nvic.h"
+
+#define NVIC_RAM_VECTOR_ADDRESS   (0x20000000)  // Location of vectors in RAM
+#define NVIC_FLASH_VECTOR_ADDRESS (0x00000000)  // Initial vector position in flash
+
+void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
+    uint32_t *vectors = (uint32_t*)SCB->VTOR;
+    uint32_t i;
+
+    // Copy and switch to dynamic vectors if the first time called
+    if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) {
+        uint32_t *old_vectors = vectors;
+        vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
+        for (i=0; i<NVIC_NUM_VECTORS; i++) {
+            vectors[i] = old_vectors[i];
+        }
+        SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
+    }
+    vectors[IRQn + NVIC_USER_IRQ_OFFSET] = vector;
+}
+
+uint32_t NVIC_GetVector(IRQn_Type IRQn) {
+    uint32_t *vectors = (uint32_t*)SCB->VTOR;
+    return vectors[IRQn + NVIC_USER_IRQ_OFFSET];
+}