mbed library sources
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targets/cmsis/TARGET_STM/TARGET_STM32F4XX/cmsis_nvic.c@39:6f0d2ff04ac3, 2013-10-25 (annotated)
- Committer:
- mbed_official
- Date:
- Fri Oct 25 13:30:04 2013 +0100
- Revision:
- 39:6f0d2ff04ac3
- Parent:
- 20:4263a77256ae
Synchronized with git revision 7a15854fb8d9be2511f9147b578e93525f1a3f1a
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
bogdanm | 20:4263a77256ae | 1 | /* mbed Microcontroller Library - cmsis_nvic for STM32F4 |
bogdanm | 20:4263a77256ae | 2 | * Copyright (c) 2009-2011 ARM Limited. All rights reserved. |
bogdanm | 20:4263a77256ae | 3 | * |
bogdanm | 20:4263a77256ae | 4 | * CMSIS-style functionality to support dynamic vectors |
bogdanm | 20:4263a77256ae | 5 | */ |
bogdanm | 20:4263a77256ae | 6 | #include "cmsis_nvic.h" |
bogdanm | 20:4263a77256ae | 7 | |
bogdanm | 20:4263a77256ae | 8 | #define NVIC_RAM_VECTOR_ADDRESS (0x20000000) // Location of vectors in RAM |
mbed_official | 39:6f0d2ff04ac3 | 9 | |
mbed_official | 39:6f0d2ff04ac3 | 10 | static unsigned char vtor_relocated; |
bogdanm | 20:4263a77256ae | 11 | |
bogdanm | 20:4263a77256ae | 12 | void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) { |
bogdanm | 20:4263a77256ae | 13 | uint32_t *vectors = (uint32_t*)SCB->VTOR; |
bogdanm | 20:4263a77256ae | 14 | uint32_t i; |
bogdanm | 20:4263a77256ae | 15 | |
bogdanm | 20:4263a77256ae | 16 | // Copy and switch to dynamic vectors if the first time called |
mbed_official | 39:6f0d2ff04ac3 | 17 | if (!vtor_relocated) { |
bogdanm | 20:4263a77256ae | 18 | uint32_t *old_vectors = vectors; |
bogdanm | 20:4263a77256ae | 19 | vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS; |
bogdanm | 20:4263a77256ae | 20 | for (i=0; i<NVIC_NUM_VECTORS; i++) { |
bogdanm | 20:4263a77256ae | 21 | vectors[i] = old_vectors[i]; |
bogdanm | 20:4263a77256ae | 22 | } |
bogdanm | 20:4263a77256ae | 23 | SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS; |
mbed_official | 39:6f0d2ff04ac3 | 24 | vtor_relocated = 1; |
bogdanm | 20:4263a77256ae | 25 | } |
bogdanm | 20:4263a77256ae | 26 | vectors[IRQn + 16] = vector; |
bogdanm | 20:4263a77256ae | 27 | } |
bogdanm | 20:4263a77256ae | 28 | |
bogdanm | 20:4263a77256ae | 29 | uint32_t NVIC_GetVector(IRQn_Type IRQn) { |
bogdanm | 20:4263a77256ae | 30 | uint32_t *vectors = (uint32_t*)SCB->VTOR; |
bogdanm | 20:4263a77256ae | 31 | return vectors[IRQn + 16]; |
bogdanm | 20:4263a77256ae | 32 | } |
bogdanm | 20:4263a77256ae | 33 |