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00001 /******************** (C) COPYRIGHT 2008 STMicroelectronics ******************** 00002 * File Name : stm32w108_systick.c 00003 * Author : MCD Application Team 00004 * Version : V2.0.3 00005 * Date : 09/22/2008 00006 * Description : This file provides all the SysTick firmware functions. 00007 ******************************************************************************** 00008 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS 00009 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. 00010 * AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, 00011 * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE 00012 * CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING 00013 * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. 00014 *******************************************************************************/ 00015 00016 /* Includes ------------------------------------------------------------------*/ 00017 #include "stm32w_systick.h" 00018 00019 /* Private typedef -----------------------------------------------------------*/ 00020 /* Private define ------------------------------------------------------------*/ 00021 /* ---------------------- SysTick registers bit mask -------------------- */ 00022 /* CTRL TICKINT Mask */ 00023 #define CTRL_TICKINT_Set ((u32)0x00000002) 00024 #define CTRL_TICKINT_Reset ((u32)0xFFFFFFFD) 00025 00026 /* Private macro -------------------------------------------------------------*/ 00027 /* Private variables ---------------------------------------------------------*/ 00028 /* Private function prototypes -----------------------------------------------*/ 00029 /* Private functions ---------------------------------------------------------*/ 00030 00031 /******************************************************************************* 00032 * Function Name : SysTick_CLKSourceConfig 00033 * Description : Configures the SysTick clock source. 00034 * Input : - SysTick_CLKSource: specifies the SysTick clock source. 00035 * This parameter can be one of the following values: 00036 * - SysTick_CLKSource_HCLK_Div8: AHB clock divided by 8 00037 * selected as SysTick clock source. 00038 * - SysTick_CLKSource_HCLK: AHB clock selected as 00039 * SysTick clock source. 00040 * Output : None 00041 * Return : None 00042 *******************************************************************************/ 00043 void SysTick_CLKSourceConfig(u32 SysTick_CLKSource) 00044 { 00045 /* Check the parameters */ 00046 assert_param(IS_SYSTICK_CLK_SOURCE(SysTick_CLKSource)); 00047 00048 if (SysTick_CLKSource == SysTick_CLKSource_HCLK) 00049 { 00050 SysTick->CTRL |= SysTick_CLKSource_HCLK; 00051 } 00052 else 00053 { 00054 SysTick->CTRL &= SysTick_CLKSource_HCLK_Div8; 00055 } 00056 } 00057 00058 /******************************************************************************* 00059 * Function Name : SysTick_SetReload 00060 * Description : Sets SysTick Reload value. 00061 * Input : - Reload: SysTick Reload new value. 00062 * This parameter must be a number between 1 and 0xFFFFFF. 00063 * Output : None 00064 * Return : None 00065 *******************************************************************************/ 00066 void SysTick_SetReload(u32 Reload) 00067 { 00068 /* Check the parameters */ 00069 assert_param(IS_SYSTICK_RELOAD(Reload)); 00070 00071 SysTick->LOAD = Reload; 00072 } 00073 00074 /******************************************************************************* 00075 * Function Name : SysTick_CounterCmd 00076 * Description : Enables or disables the SysTick counter. 00077 * Input : - SysTick_Counter: new state of the SysTick counter. 00078 * This parameter can be one of the following values: 00079 * - SysTick_Counter_Disable: Disable counter 00080 * - SysTick_Counter_Enable: Enable counter 00081 * - SysTick_Counter_Clear: Clear counter value to 0 00082 * Output : None 00083 * Return : None 00084 *******************************************************************************/ 00085 void SysTick_CounterCmd(u32 SysTick_Counter) 00086 { 00087 /* Check the parameters */ 00088 assert_param(IS_SYSTICK_COUNTER(SysTick_Counter)); 00089 00090 if (SysTick_Counter == SysTick_Counter_Enable) 00091 { 00092 SysTick->CTRL |= SysTick_Counter_Enable; 00093 } 00094 else if (SysTick_Counter == SysTick_Counter_Disable) 00095 { 00096 SysTick->CTRL &= SysTick_Counter_Disable; 00097 } 00098 else /* SysTick_Counter == SysTick_Counter_Clear */ 00099 { 00100 SysTick->VAL = SysTick_Counter_Clear; 00101 } 00102 } 00103 00104 /******************************************************************************* 00105 * Function Name : SysTick_ITConfig 00106 * Description : Enables or disables the SysTick Interrupt. 00107 * Input : - NewState: new state of the SysTick Interrupt. 00108 * This parameter can be: ENABLE or DISABLE. 00109 * Output : None 00110 * Return : None 00111 *******************************************************************************/ 00112 void SysTick_ITConfig(FunctionalState NewState) 00113 { 00114 /* Check the parameters */ 00115 assert_param(IS_FUNCTIONAL_STATE(NewState)); 00116 00117 if (NewState != DISABLE) 00118 { 00119 SysTick->CTRL |= CTRL_TICKINT_Set; 00120 } 00121 else 00122 { 00123 SysTick->CTRL &= CTRL_TICKINT_Reset; 00124 } 00125 } 00126 00127 /******************************************************************************* 00128 * Function Name : SysTick_GetCounter 00129 * Description : Gets SysTick counter value. 00130 * Input : None 00131 * Output : None 00132 * Return : SysTick current value 00133 *******************************************************************************/ 00134 u32 SysTick_GetCounter(void) 00135 { 00136 return(SysTick->VAL); 00137 } 00138 00139 /******************************************************************************* 00140 * Function Name : SysTick_GetFlagStatus 00141 * Description : Checks whether the specified SysTick flag is set or not. 00142 * Input : - SysTick_FLAG: specifies the flag to check. 00143 * This parameter can be one of the following values: 00144 * - SysTick_FLAG_COUNT 00145 * - SysTick_FLAG_SKEW 00146 * - SysTick_FLAG_NOREF 00147 * Output : None 00148 * Return : None 00149 *******************************************************************************/ 00150 FlagStatus SysTick_GetFlagStatus(u8 SysTick_FLAG) 00151 { 00152 u32 statusreg = 0, tmp = 0 ; 00153 FlagStatus bitstatus = RESET; 00154 00155 /* Check the parameters */ 00156 assert_param(IS_SYSTICK_FLAG(SysTick_FLAG)); 00157 00158 /* Get the SysTick register index */ 00159 tmp = SysTick_FLAG >> 3; 00160 00161 if (tmp == 2) /* The flag to check is in CTRL register */ 00162 { 00163 statusreg = SysTick->CTRL; 00164 } 00165 else /* The flag to check is in CALIB register */ 00166 { 00167 statusreg = SysTick->CALIB; 00168 } 00169 00170 if ((statusreg & ((u32)1 << SysTick_FLAG)) != (u32)RESET) 00171 { 00172 bitstatus = SET; 00173 } 00174 else 00175 { 00176 bitstatus = RESET; 00177 } 00178 return bitstatus; 00179 } 00180 00181 /******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/