|
STM32F0xx Standard Peripherals Firmware Library
|
STM32F0xx_StdPeriph_Examples/SYSCFG/SYSCFG_PVD/main.c
Go to the documentation of this file.
00001 /** 00002 ****************************************************************************** 00003 * @file SYSCFG/SYSCFG_PVD/main.c 00004 * @author MCD Application Team 00005 * @version V1.4.0 00006 * @date 24-July-2014 00007 * @brief Main program body 00008 ****************************************************************************** 00009 * @attention 00010 * 00011 * <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2> 00012 * 00013 * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License"); 00014 * You may not use this file except in compliance with the License. 00015 * You may obtain a copy of the License at: 00016 * 00017 * http://www.st.com/software_license_agreement_liberty_v2 00018 * 00019 * Unless required by applicable law or agreed to in writing, software 00020 * distributed under the License is distributed on an "AS IS" BASIS, 00021 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00022 * See the License for the specific language governing permissions and 00023 * limitations under the License. 00024 * 00025 ****************************************************************************** 00026 */ 00027 00028 /* Includes ------------------------------------------------------------------*/ 00029 #include "main.h" 00030 00031 /** @addtogroup STM32F0xx_StdPeriph_Examples 00032 * @{ 00033 */ 00034 00035 /** @addtogroup SYSCFG_PVD 00036 * @{ 00037 */ 00038 00039 /* Private typedef -----------------------------------------------------------*/ 00040 /* Private define ------------------------------------------------------------*/ 00041 /* Private macro -------------------------------------------------------------*/ 00042 /* Private variables ---------------------------------------------------------*/ 00043 /* Private function prototypes -----------------------------------------------*/ 00044 /* Private functions ---------------------------------------------------------*/ 00045 static void TIM_Config(void); 00046 00047 /** 00048 * @brief Main program. 00049 * @param None 00050 * @retval None 00051 */ 00052 int main(void) 00053 { 00054 /*!< At this stage the microcontroller clock setting is already configured, 00055 this is done through SystemInit() function which is called from startup 00056 file (startup_stm32f0xx.s) before to branch to application main. 00057 To reconfigure the default setting of SystemInit() function, refer to 00058 system_stm32f0xx.c file 00059 */ 00060 00061 /* PWR clock enable */ 00062 RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE); 00063 00064 /* PVD configuration: Level 5 */ 00065 PWR_PVDLevelConfig(PWR_PVDLevel_5); 00066 00067 /* Enable the Power Voltage Detector(PVD) */ 00068 PWR_PVDCmd(ENABLE); 00069 00070 /* Enable SYSCFG clock */ 00071 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE); 00072 00073 /* Connect PVD event with BKIN: when a PVD event (VDD lower than the threshold) 00074 is detected a break event is generated */ 00075 SYSCFG_BreakConfig(SYSCFG_Break_PVD); 00076 00077 /* TIM1 channels Configuration in PWM mode */ 00078 TIM_Config(); 00079 00080 /* Wait till a PVD event is detected */ 00081 while(PWR_GetFlagStatus(PWR_FLAG_PVDO) == RESET); 00082 00083 /* Infinite loop */ 00084 while (1) 00085 { 00086 } 00087 } 00088 00089 /** 00090 * @brief Configures TIM1: channels in PWM mode 00091 * @param None 00092 * @retval None 00093 */ 00094 static void TIM_Config(void) 00095 { 00096 00097 TIM_BDTRInitTypeDef TIM_BDTRInitStructure; 00098 TIM_OCInitTypeDef TIM_OCInitStructure; 00099 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; 00100 GPIO_InitTypeDef GPIO_InitStructure; 00101 00102 /* GPIOA clock enable */ 00103 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE); 00104 00105 /* TIM1 channels pin configuration: 00106 TIM1_CH1 -> PA8 00107 */ 00108 GPIO_StructInit(&GPIO_InitStructure); 00109 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; 00110 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 00111 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; 00112 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; 00113 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; 00114 GPIO_Init(GPIOA, &GPIO_InitStructure); 00115 00116 /* Enable Alternate function on PA8 to be controlled by TIM1 */ 00117 GPIO_PinAFConfig(GPIOA, GPIO_PinSource8, GPIO_AF_2); 00118 00119 /* TIM1 clock enable */ 00120 RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); 00121 00122 /* Time Base configuration */ 00123 TIM_TimeBaseStructInit(&TIM_TimeBaseStructure); 00124 TIM_TimeBaseStructure.TIM_Prescaler = 0; 00125 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; 00126 TIM_TimeBaseStructure.TIM_Period = 100; 00127 TIM_TimeBaseStructure.TIM_ClockDivision = 0; 00128 TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; 00129 TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); 00130 00131 /* Channel 1 Configuration in PWM mode */ 00132 TIM_OCStructInit(&TIM_OCInitStructure); 00133 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; 00134 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; 00135 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; 00136 TIM_OCInitStructure.TIM_Pulse = 50; 00137 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; 00138 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low; 00139 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; 00140 TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset; 00141 TIM_OC1Init(TIM1, &TIM_OCInitStructure); 00142 00143 /* Automatic Output enable, Break, dead time and lock configuration*/ 00144 TIM_BDTRStructInit(&TIM_BDTRInitStructure); 00145 TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable; 00146 TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable; 00147 TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1; 00148 TIM_BDTRInitStructure.TIM_DeadTime = 11; 00149 TIM_BDTRInitStructure.TIM_Break = TIM_Break_Enable; 00150 TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High; 00151 TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable; 00152 TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure); 00153 00154 /* Main Output Enable */ 00155 TIM_CtrlPWMOutputs(TIM1, ENABLE); 00156 00157 /* TIM1 counter enable */ 00158 TIM_Cmd(TIM1, ENABLE); 00159 } 00160 00161 #ifdef USE_FULL_ASSERT 00162 00163 /** 00164 * @brief Reports the name of the source file and the source line number 00165 * where the assert_param error has occurred. 00166 * @param file: pointer to the source file name 00167 * @param line: assert_param error line source number 00168 * @retval None 00169 */ 00170 void assert_failed(uint8_t* file, uint32_t line) 00171 { 00172 /* User can add his own implementation to report the file name and line number, 00173 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ 00174 00175 /* Infinite loop */ 00176 while (1) 00177 { 00178 } 00179 } 00180 #endif 00181 00182 /** 00183 * @} 00184 */ 00185 00186 /** 00187 * @} 00188 */ 00189 00190 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/