1 /******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
\r
2 * File Name : stm32f10x_systick.c
\r
3 * Author : MCD Application Team
\r
4 * Date First Issued : 09/29/2006
\r
5 * Description : This file provides all the SysTick firmware functions.
\r
6 ********************************************************************************
\r
11 ********************************************************************************
\r
12 * THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
\r
13 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
\r
14 * AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
\r
15 * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
\r
16 * CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
\r
17 * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
\r
18 *******************************************************************************/
\r
20 /* Includes ------------------------------------------------------------------*/
\r
21 #include "stm32f10x_systick.h"
\r
23 /* Private typedef -----------------------------------------------------------*/
\r
24 /* Private define ------------------------------------------------------------*/
\r
25 /* ---------------------- SysTick registers bit mask -------------------- */
\r
26 /* CTRL TICKINT Mask */
\r
27 #define CTRL_TICKINT_Set ((u32)0x00000002)
\r
28 #define CTRL_TICKINT_Reset ((u32)0xFFFFFFFD)
\r
30 /* SysTick Flag Mask */
\r
31 #define FLAG_Mask ((u8)0x1F)
\r
33 /* Private macro -------------------------------------------------------------*/
\r
34 /* Private variables ---------------------------------------------------------*/
\r
35 /* Private function prototypes -----------------------------------------------*/
\r
36 /* Private functions ---------------------------------------------------------*/
\r
38 /*******************************************************************************
\r
39 * Function Name : SysTick_CLKSourceConfig
\r
40 * Description : Configures the SysTick clock source.
\r
41 * Input : - SysTick_CLKSource: specifies the SysTick clock source.
\r
42 * This parameter can be one of the following values:
\r
43 * - SysTick_CLKSource_HCLK_Div8: AHB clock divided by 8
\r
44 * selected as SysTick clock source.
\r
45 * - SysTick_CLKSource_HCLK: AHB clock selected as
\r
46 * SysTick clock source.
\r
49 *******************************************************************************/
\r
50 void SysTick_CLKSourceConfig(u32 SysTick_CLKSource)
\r
52 /* Check the parameters */
\r
53 assert(IS_SYSTICK_CLK_SOURCE(SysTick_CLKSource));
\r
55 if (SysTick_CLKSource == SysTick_CLKSource_HCLK)
\r
57 SysTick->CTRL |= SysTick_CLKSource_HCLK;
\r
61 SysTick->CTRL &= SysTick_CLKSource_HCLK_Div8;
\r
65 /*******************************************************************************
\r
66 * Function Name : SysTick_SetReload
\r
67 * Description : Sets SysTick Reload value.
\r
68 * Input : - Reload: SysTick Reload new value.
\r
69 * This parameter must be a number between 1 and 0xFFFFFF.
\r
72 *******************************************************************************/
\r
73 void SysTick_SetReload(u32 Reload)
\r
75 /* Check the parameters */
\r
76 assert(IS_SYSTICK_RELOAD(Reload));
\r
78 SysTick->LOAD = Reload;
\r
81 /*******************************************************************************
\r
82 * Function Name : SysTick_CounterCmd
\r
83 * Description : Enables or disables the SysTick counter.
\r
84 * Input : - SysTick_Counter: new state of the SysTick counter.
\r
85 * This parameter can be one of the following values:
\r
86 * - SysTick_Counter_Disable: Disable counter
\r
87 * - SysTick_Counter_Enable: Enable counter
\r
88 * - SysTick_Counter_Clear: Clear counter value to 0
\r
91 *******************************************************************************/
\r
92 void SysTick_CounterCmd(u32 SysTick_Counter)
\r
94 /* Check the parameters */
\r
95 assert(IS_SYSTICK_COUNTER(SysTick_Counter));
\r
97 if (SysTick_Counter == SysTick_Counter_Clear)
\r
99 SysTick->VAL = SysTick_Counter_Clear;
\r
103 if (SysTick_Counter == SysTick_Counter_Enable)
\r
105 SysTick->CTRL |= SysTick_Counter_Enable;
\r
109 SysTick->CTRL &= SysTick_Counter_Disable;
\r
114 /*******************************************************************************
\r
115 * Function Name : SysTick_ITConfig
\r
116 * Description : Enables or disables the SysTick Interrupt.
\r
117 * Input : - NewState: new state of the SysTick Interrupt.
\r
118 * This parameter can be: ENABLE or DISABLE.
\r
121 *******************************************************************************/
\r
122 void SysTick_ITConfig(FunctionalState NewState)
\r
124 /* Check the parameters */
\r
125 assert(IS_FUNCTIONAL_STATE(NewState));
\r
127 if (NewState != DISABLE)
\r
129 SysTick->CTRL |= CTRL_TICKINT_Set;
\r
133 SysTick->CTRL &= CTRL_TICKINT_Reset;
\r
137 /*******************************************************************************
\r
138 * Function Name : SysTick_GetCounter
\r
139 * Description : Gets SysTick counter value.
\r
142 * Return : SysTick current value
\r
143 *******************************************************************************/
\r
144 u32 SysTick_GetCounter(void)
\r
146 return(SysTick->VAL);
\r
149 /*******************************************************************************
\r
150 * Function Name : SysTick_GetFlagStatus
\r
151 * Description : Checks whether the specified SysTick flag is set or not.
\r
152 * Input : - SysTick_FLAG: specifies the flag to check.
\r
153 * This parameter can be one of the following values:
\r
154 * - SysTick_FLAG_COUNT
\r
155 * - SysTick_FLAG_SKEW
\r
156 * - SysTick_FLAG_NOREF
\r
159 *******************************************************************************/
\r
160 FlagStatus SysTick_GetFlagStatus(u8 SysTick_FLAG)
\r
164 FlagStatus bitstatus = RESET;
\r
166 /* Check the parameters */
\r
167 assert(IS_SYSTICK_FLAG(SysTick_FLAG));
\r
169 /* Get the SysTick register index */
\r
170 tmp = SysTick_FLAG >> 5;
\r
172 if (tmp == 1) /* The flag to check is in CTRL register */
\r
174 statusreg = SysTick->CTRL;
\r
176 else /* The flag to check is in CALIB register */
\r
178 statusreg = SysTick->CALIB;
\r
181 /* Get the flag position */
\r
182 tmp = SysTick_FLAG & FLAG_Mask;
\r
184 if ((statusreg & ((u32)1 << tmp)) != (u32)RESET)
\r
195 /******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/
\r