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2067 kakl 1 /**
2 ******************************************************************************
3 * @file misc.c
4 * @author MCD Application Team
5 * @version V3.4.0
6 * @date 10/15/2010
7 * @brief This file provides all the miscellaneous firmware functions (add-on
8 * to CMSIS functions).
9 ******************************************************************************
10 * @copy
11 *
12 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
13 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
14 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
15 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
16 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
17 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
18 *
19 * <h2><center>&copy; COPYRIGHT 2010 STMicroelectronics</center></h2>
20 */
21  
22 /* Includes ------------------------------------------------------------------*/
23 #include "misc.h"
24  
25 /** @addtogroup STM32F10x_StdPeriph_Driver
26 * @{
27 */
28  
29 /** @defgroup MISC
30 * @brief MISC driver modules
31 * @{
32 */
33  
34 /** @defgroup MISC_Private_TypesDefinitions
35 * @{
36 */
37  
38 /**
39 * @}
40 */
41  
42 /** @defgroup MISC_Private_Defines
43 * @{
44 */
45  
46 #define AIRCR_VECTKEY_MASK ((uint32_t)0x05FA0000)
47 /**
48 * @}
49 */
50  
51 /** @defgroup MISC_Private_Macros
52 * @{
53 */
54  
55 /**
56 * @}
57 */
58  
59 /** @defgroup MISC_Private_Variables
60 * @{
61 */
62  
63 /**
64 * @}
65 */
66  
67 /** @defgroup MISC_Private_FunctionPrototypes
68 * @{
69 */
70  
71 /**
72 * @}
73 */
74  
75 /** @defgroup MISC_Private_Functions
76 * @{
77 */
78  
79 /**
80 * @brief Configures the priority grouping: pre-emption priority and subpriority.
81 * @param NVIC_PriorityGroup: specifies the priority grouping bits length.
82 * This parameter can be one of the following values:
83 * @arg NVIC_PriorityGroup_0: 0 bits for pre-emption priority
84 * 4 bits for subpriority
85 * @arg NVIC_PriorityGroup_1: 1 bits for pre-emption priority
86 * 3 bits for subpriority
87 * @arg NVIC_PriorityGroup_2: 2 bits for pre-emption priority
88 * 2 bits for subpriority
89 * @arg NVIC_PriorityGroup_3: 3 bits for pre-emption priority
90 * 1 bits for subpriority
91 * @arg NVIC_PriorityGroup_4: 4 bits for pre-emption priority
92 * 0 bits for subpriority
93 * @retval None
94 */
95 void NVIC_PriorityGroupConfig(uint32_t NVIC_PriorityGroup)
96 {
97 /* Check the parameters */
98 assert_param(IS_NVIC_PRIORITY_GROUP(NVIC_PriorityGroup));
99  
100 /* Set the PRIGROUP[10:8] bits according to NVIC_PriorityGroup value */
101 SCB->AIRCR = AIRCR_VECTKEY_MASK | NVIC_PriorityGroup;
102 }
103  
104 /**
105 * @brief Initializes the NVIC peripheral according to the specified
106 * parameters in the NVIC_InitStruct.
107 * @param NVIC_InitStruct: pointer to a NVIC_InitTypeDef structure that contains
108 * the configuration information for the specified NVIC peripheral.
109 * @retval None
110 */
111 void NVIC_Init(NVIC_InitTypeDef* NVIC_InitStruct)
112 {
113 uint32_t tmppriority = 0x00, tmppre = 0x00, tmpsub = 0x0F;
114  
115 /* Check the parameters */
116 assert_param(IS_FUNCTIONAL_STATE(NVIC_InitStruct->NVIC_IRQChannelCmd));
117 assert_param(IS_NVIC_PREEMPTION_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority));
118 assert_param(IS_NVIC_SUB_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelSubPriority));
119  
120 if (NVIC_InitStruct->NVIC_IRQChannelCmd != DISABLE)
121 {
122 /* Compute the Corresponding IRQ Priority --------------------------------*/
123 tmppriority = (0x700 - ((SCB->AIRCR) & (uint32_t)0x700))>> 0x08;
124 tmppre = (0x4 - tmppriority);
125 tmpsub = tmpsub >> tmppriority;
126  
127 tmppriority = (uint32_t)NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority << tmppre;
128 tmppriority |= NVIC_InitStruct->NVIC_IRQChannelSubPriority & tmpsub;
129 tmppriority = tmppriority << 0x04;
130  
131 NVIC->IP[NVIC_InitStruct->NVIC_IRQChannel] = tmppriority;
132  
133 /* Enable the Selected IRQ Channels --------------------------------------*/
134 NVIC->ISER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] =
135 (uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F);
136 }
137 else
138 {
139 /* Disable the Selected IRQ Channels -------------------------------------*/
140 NVIC->ICER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] =
141 (uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F);
142 }
143 }
144  
145 /**
146 * @brief Sets the vector table location and Offset.
147 * @param NVIC_VectTab: specifies if the vector table is in RAM or FLASH memory.
148 * This parameter can be one of the following values:
149 * @arg NVIC_VectTab_RAM
150 * @arg NVIC_VectTab_FLASH
151 * @param Offset: Vector Table base offset field. This value must be a multiple of 0x100.
152 * @retval None
153 */
154 void NVIC_SetVectorTable(uint32_t NVIC_VectTab, uint32_t Offset)
155 {
156 /* Check the parameters */
157 assert_param(IS_NVIC_VECTTAB(NVIC_VectTab));
158 assert_param(IS_NVIC_OFFSET(Offset));
159  
160 SCB->VTOR = NVIC_VectTab | (Offset & (uint32_t)0x1FFFFF80);
161 }
162  
163 /**
164 * @brief Selects the condition for the system to enter low power mode.
165 * @param LowPowerMode: Specifies the new mode for the system to enter low power mode.
166 * This parameter can be one of the following values:
167 * @arg NVIC_LP_SEVONPEND
168 * @arg NVIC_LP_SLEEPDEEP
169 * @arg NVIC_LP_SLEEPONEXIT
170 * @param NewState: new state of LP condition. This parameter can be: ENABLE or DISABLE.
171 * @retval None
172 */
173 void NVIC_SystemLPConfig(uint8_t LowPowerMode, FunctionalState NewState)
174 {
175 /* Check the parameters */
176 assert_param(IS_NVIC_LP(LowPowerMode));
177 assert_param(IS_FUNCTIONAL_STATE(NewState));
178  
179 if (NewState != DISABLE)
180 {
181 SCB->SCR |= LowPowerMode;
182 }
183 else
184 {
185 SCB->SCR &= (uint32_t)(~(uint32_t)LowPowerMode);
186 }
187 }
188  
189 /**
190 * @brief Configures the SysTick clock source.
191 * @param SysTick_CLKSource: specifies the SysTick clock source.
192 * This parameter can be one of the following values:
193 * @arg SysTick_CLKSource_HCLK_Div8: AHB clock divided by 8 selected as SysTick clock source.
194 * @arg SysTick_CLKSource_HCLK: AHB clock selected as SysTick clock source.
195 * @retval None
196 */
197 void SysTick_CLKSourceConfig(uint32_t SysTick_CLKSource)
198 {
199 /* Check the parameters */
200 assert_param(IS_SYSTICK_CLK_SOURCE(SysTick_CLKSource));
201 if (SysTick_CLKSource == SysTick_CLKSource_HCLK)
202 {
203 SysTick->CTRL |= SysTick_CLKSource_HCLK;
204 }
205 else
206 {
207 SysTick->CTRL &= SysTick_CLKSource_HCLK_Div8;
208 }
209 }
210  
211 /**
212 * @}
213 */
214  
215 /**
216 * @}
217 */
218  
219 /**
220 * @}
221 */
222  
223 /******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/