Rev Author Line No. Line
3328 povik 1 /**
2 ******************************************************************************
3 * @file misc.c
4 * @author MCD Application Team
5 * @version V3.1.0
6 * @date 06/19/2009
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 2009 STMicroelectronics</center></h2>
20 */
21  
22 /* Includes ------------------------------------------------------------------*/
23 #include "misc.h"
24 #include "stm32f10x_conf.h"
25  
26 /** @addtogroup STM32F10x_StdPeriph_Driver
27 * @{
28 */
29  
30 /** @defgroup MISC
31 * @brief MISC driver modules
32 * @{
33 */
34  
35 /** @defgroup MISC_Private_TypesDefinitions
36 * @{
37 */
38  
39 /**
40 * @}
41 */
42  
43 /** @defgroup MISC_Private_Defines
44 * @{
45 */
46  
47 #define AIRCR_VECTKEY_MASK ((uint32_t)0x05FA0000)
48 /**
49 * @}
50 */
51  
52 /** @defgroup MISC_Private_Macros
53 * @{
54 */
55  
56 /**
57 * @}
58 */
59  
60 /** @defgroup MISC_Private_Variables
61 * @{
62 */
63  
64 /**
65 * @}
66 */
67  
68 /** @defgroup MISC_Private_FunctionPrototypes
69 * @{
70 */
71  
72 /**
73 * @}
74 */
75  
76 /** @defgroup MISC_Private_Functions
77 * @{
78 */
79  
80 /**
81 * @brief Configures the priority grouping: pre-emption priority and subpriority.
82 * @param NVIC_PriorityGroup: specifies the priority grouping bits length.
83 * This parameter can be one of the following values:
84 * @arg NVIC_PriorityGroup_0: 0 bits for pre-emption priority
85 * 4 bits for subpriority
86 * @arg NVIC_PriorityGroup_1: 1 bits for pre-emption priority
87 * 3 bits for subpriority
88 * @arg NVIC_PriorityGroup_2: 2 bits for pre-emption priority
89 * 2 bits for subpriority
90 * @arg NVIC_PriorityGroup_3: 3 bits for pre-emption priority
91 * 1 bits for subpriority
92 * @arg NVIC_PriorityGroup_4: 4 bits for pre-emption priority
93 * 0 bits for subpriority
94 * @retval None
95 */
96 void NVIC_PriorityGroupConfig(uint32_t NVIC_PriorityGroup)
97 {
98 /* Check the parameters */
99 assert_param(IS_NVIC_PRIORITY_GROUP(NVIC_PriorityGroup));
100  
101 /* Set the PRIGROUP[10:8] bits according to NVIC_PriorityGroup value */
102 SCB->AIRCR = AIRCR_VECTKEY_MASK | NVIC_PriorityGroup;
103 }
104  
105 /**
106 * @brief Initializes the NVIC peripheral according to the specified
107 * parameters in the NVIC_InitStruct.
108 * @param NVIC_InitStruct: pointer to a NVIC_InitTypeDef structure that contains
109 * the configuration information for the specified NVIC peripheral.
110 * @retval None
111 */
112 void NVIC_Init(NVIC_InitTypeDef* NVIC_InitStruct)
113 {
114 uint32_t tmppriority = 0x00, tmppre = 0x00, tmpsub = 0x0F;
115  
116 /* Check the parameters */
117 assert_param(IS_FUNCTIONAL_STATE(NVIC_InitStruct->NVIC_IRQChannelCmd));
118 assert_param(IS_NVIC_PREEMPTION_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority));
119 assert_param(IS_NVIC_SUB_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelSubPriority));
120  
121 if (NVIC_InitStruct->NVIC_IRQChannelCmd != DISABLE)
122 {
123 /* Compute the Corresponding IRQ Priority --------------------------------*/
124 tmppriority = (0x700 - ((SCB->AIRCR) & (uint32_t)0x700))>> 0x08;
125 tmppre = (0x4 - tmppriority);
126 tmpsub = tmpsub >> tmppriority;
127  
128 tmppriority = (uint32_t)NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority << tmppre;
129 tmppriority |= NVIC_InitStruct->NVIC_IRQChannelSubPriority & tmpsub;
130 tmppriority = tmppriority << 0x04;
131  
132 NVIC->IP[NVIC_InitStruct->NVIC_IRQChannel] = tmppriority;
133  
134 /* Enable the Selected IRQ Channels --------------------------------------*/
135 NVIC->ISER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] =
136 (uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F);
137 }
138 else
139 {
140 /* Disable the Selected IRQ Channels -------------------------------------*/
141 NVIC->ICER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] =
142 (uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F);
143 }
144 }
145  
146 /**
147 * @brief Sets the vector table location and Offset.
148 * @param NVIC_VectTab: specifies if the vector table is in RAM or FLASH memory.
149 * This parameter can be one of the following values:
150 * @arg NVIC_VectTab_RAM
151 * @arg NVIC_VectTab_FLASH
152 * @param Offset: Vector Table base offset field. This value must be a multiple of 0x100.
153 * @retval None
154 */
155 void NVIC_SetVectorTable(uint32_t NVIC_VectTab, uint32_t Offset)
156 {
157 /* Check the parameters */
158 assert_param(IS_NVIC_VECTTAB(NVIC_VectTab));
159 assert_param(IS_NVIC_OFFSET(Offset));
160  
161 SCB->VTOR = NVIC_VectTab | (Offset & (uint32_t)0x1FFFFF80);
162 }
163  
164 /**
165 * @brief Selects the condition for the system to enter low power mode.
166 * @param LowPowerMode: Specifies the new mode for the system to enter low power mode.
167 * This parameter can be one of the following values:
168 * @arg NVIC_LP_SEVONPEND
169 * @arg NVIC_LP_SLEEPDEEP
170 * @arg NVIC_LP_SLEEPONEXIT
171 * @param NewState: new state of LP condition. This parameter can be: ENABLE or DISABLE.
172 * @retval None
173 */
174 void NVIC_SystemLPConfig(uint8_t LowPowerMode, FunctionalState NewState)
175 {
176 /* Check the parameters */
177 assert_param(IS_NVIC_LP(LowPowerMode));
178 assert_param(IS_FUNCTIONAL_STATE(NewState));
179  
180 if (NewState != DISABLE)
181 {
182 SCB->SCR |= LowPowerMode;
183 }
184 else
185 {
186 SCB->SCR &= (uint32_t)(~(uint32_t)LowPowerMode);
187 }
188 }
189  
190 /**
191 * @brief Configures the SysTick clock source.
192 * @param SysTick_CLKSource: specifies the SysTick clock source.
193 * This parameter can be one of the following values:
194 * @arg SysTick_CLKSource_HCLK_Div8: AHB clock divided by 8 selected as SysTick clock source.
195 * @arg SysTick_CLKSource_HCLK: AHB clock selected as SysTick clock source.
196 * @retval None
197 */
198 void SysTick_CLKSourceConfig(uint32_t SysTick_CLKSource)
199 {
200 /* Check the parameters */
201 assert_param(IS_SYSTICK_CLK_SOURCE(SysTick_CLKSource));
202 if (SysTick_CLKSource == SysTick_CLKSource_HCLK)
203 {
204 SysTick->CTRL |= SysTick_CLKSource_HCLK;
205 }
206 else
207 {
208 SysTick->CTRL &= SysTick_CLKSource_HCLK_Div8;
209 }
210 }
211  
212 /**
213 * @}
214 */
215  
216 /**
217 * @}
218 */
219  
220 /**
221 * @}
222 */
223  
224 /******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/