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diff --git a/keyboard/infinity/mbed-infinity/cmsis_nvic.c b/keyboard/infinity/mbed-infinity/cmsis_nvic.c
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+/* mbed Microcontroller Library
+ * CMSIS-style functionality to support dynamic vectors
+ *******************************************************************************
+ * Copyright (c) 2011 ARM Limited. All rights reserved.
+ * 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 ARM Limited 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 (0x1FFFE000) // Vectors positioned at start of RAM
+#define NVIC_FLASH_VECTOR_ADDRESS (0x1000) // 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 + 16] = vector;
+}
+
+uint32_t NVIC_GetVector(IRQn_Type IRQn) {
+ uint32_t *vectors = (uint32_t*)SCB->VTOR;
+ return vectors[IRQn + 16];
+}