1 | /** |
---|
2 | * @file |
---|
3 | * |
---|
4 | * @ingroup bsp_interrupt |
---|
5 | * |
---|
6 | * @brief LPC176X interrupt support. |
---|
7 | */ |
---|
8 | |
---|
9 | /* |
---|
10 | * Copyright (c) 2008-2012 embedded brains GmbH. All rights reserved. |
---|
11 | * |
---|
12 | * embedded brains GmbH |
---|
13 | * Obere Lagerstr. 30 |
---|
14 | * 82178 Puchheim |
---|
15 | * Germany |
---|
16 | * <rtems@embedded-brains.de> |
---|
17 | * |
---|
18 | * The license and distribution terms for this file may be |
---|
19 | * found in the file LICENSE in this distribution or at |
---|
20 | * http://www.rtems.com/license/LICENSE. |
---|
21 | */ |
---|
22 | |
---|
23 | #include <rtems/score/armv4.h> |
---|
24 | #include <rtems/score/armv7m.h> |
---|
25 | |
---|
26 | #include <bsp.h> |
---|
27 | #include <bsp/irq.h> |
---|
28 | #include <bsp/irq-generic.h> |
---|
29 | #include <bsp/lpc176x.h> |
---|
30 | #include <bsp/linker-symbols.h> |
---|
31 | |
---|
32 | /** |
---|
33 | * @brief Checks if the current interrupt vector lenght is valid or not. |
---|
34 | * |
---|
35 | * @param vector The current interrupt vector lenght . |
---|
36 | * @return TRUE if valid. |
---|
37 | * FALSE otherwise. |
---|
38 | */ |
---|
39 | static inline bool lpc176x_irq_is_valid( const rtems_vector_number vector ) |
---|
40 | { |
---|
41 | return vector <= BSP_INTERRUPT_VECTOR_MAX; |
---|
42 | } |
---|
43 | |
---|
44 | void lpc176x_irq_set_priority( |
---|
45 | const rtems_vector_number vector, |
---|
46 | unsigned priority |
---|
47 | ) |
---|
48 | { |
---|
49 | if ( lpc176x_irq_is_valid( vector ) ) { |
---|
50 | if ( priority > LPC176X_IRQ_PRIORITY_VALUE_MAX ) { |
---|
51 | priority = LPC176X_IRQ_PRIORITY_VALUE_MAX; |
---|
52 | } |
---|
53 | |
---|
54 | /* else implies that the priority is unlocked. Also, |
---|
55 | there is nothing to do. */ |
---|
56 | |
---|
57 | _ARMV7M_NVIC_Set_priority( (int) vector, (int) ( priority << 3u ) ); |
---|
58 | } |
---|
59 | |
---|
60 | /* else implies that the rtems vector number is invalid. Also, |
---|
61 | there is nothing to do. */ |
---|
62 | } |
---|
63 | |
---|
64 | unsigned lpc176x_irq_get_priority( const rtems_vector_number vector ) |
---|
65 | { |
---|
66 | unsigned priority; |
---|
67 | |
---|
68 | if ( lpc176x_irq_is_valid( vector ) ) { |
---|
69 | priority = (unsigned) ( _ARMV7M_NVIC_Get_priority( (int) vector ) >> 3u ); |
---|
70 | } else { |
---|
71 | priority = LPC176X_IRQ_PRIORITY_VALUE_MIN - 1u; |
---|
72 | } |
---|
73 | |
---|
74 | return priority; |
---|
75 | } |
---|