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STM32F0xx Standard Peripherals Firmware Library
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STM32F0xx_StdPeriph_Examples/TIM/TIM_6Steps/main.c
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00001 /** 00002 ****************************************************************************** 00003 * @file TIM/TIM_6Steps/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 TIM_6Steps 00036 * @{ 00037 */ 00038 00039 /* Private typedef -----------------------------------------------------------*/ 00040 /* Private define ------------------------------------------------------------*/ 00041 /* Private macro -------------------------------------------------------------*/ 00042 /* Private variables ---------------------------------------------------------*/ 00043 /* Private function prototypes -----------------------------------------------*/ 00044 static void TIM_Config(void); 00045 static void SysTickConfig(void); 00046 00047 /* Private functions ---------------------------------------------------------*/ 00048 00049 /** 00050 * @brief Main program. 00051 * @param None 00052 * @retval None 00053 */ 00054 int main(void) 00055 { 00056 /*!< At this stage the microcontroller clock setting is already configured, 00057 this is done through SystemInit() function which is called from startup 00058 file (startup_stm32f0xx.s) before to branch to application main. 00059 To reconfigure the default setting of SystemInit() function, refer to 00060 system_stm32f0xx.c file 00061 */ 00062 00063 /* SysTick Configuration */ 00064 SysTickConfig(); 00065 00066 /* TIM1 Configuration */ 00067 TIM_Config(); 00068 00069 /* Infinite loop */ 00070 while (1) 00071 { 00072 } 00073 } 00074 00075 /** 00076 * @brief Configure the TIM1 Pins. 00077 * @param None 00078 * @retval None 00079 */ 00080 static void TIM_Config(void) 00081 { 00082 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; 00083 TIM_OCInitTypeDef TIM_OCInitStructure; 00084 TIM_BDTRInitTypeDef TIM_BDTRInitStructure; 00085 GPIO_InitTypeDef GPIO_InitStructure; 00086 NVIC_InitTypeDef NVIC_InitStructure; 00087 00088 /* GPIOA and GPIOB clocks enable */ 00089 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOB, ENABLE); 00090 00091 /* TIM1 clock enable */ 00092 RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); 00093 00094 /* GPIOA Configuration: Channel 1, 2, 1N and 3 as alternate function push-pull */ 00095 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10; 00096 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; 00097 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 00098 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; 00099 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; 00100 GPIO_Init(GPIOA, &GPIO_InitStructure); 00101 00102 /* GPIOB Configuration: Channel 2N and 3N as alternate function push-pull */ 00103 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_12; 00104 GPIO_Init(GPIOB, &GPIO_InitStructure); 00105 00106 /* Connect TIM pins to AF2 */ 00107 GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_2); 00108 GPIO_PinAFConfig(GPIOA, GPIO_PinSource8, GPIO_AF_2); 00109 GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_2); 00110 GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_2); 00111 GPIO_PinAFConfig(GPIOB, GPIO_PinSource0, GPIO_AF_2); 00112 GPIO_PinAFConfig(GPIOB, GPIO_PinSource1, GPIO_AF_2); 00113 GPIO_PinAFConfig(GPIOB, GPIO_PinSource12, GPIO_AF_2); 00114 00115 /*---------------------------------------------------------------------------- 00116 The STM32F0xx TIM1 peripheral offers the possibility to program in advance the 00117 configuration for the next TIM1 outputs behaviour (step) and change the configuration 00118 of all the channels at the same time. This operation is possible when the COM 00119 (commutation) event is used. 00120 The COM event can be generated by software by setting the COM bit in the TIM1_EGR 00121 register or by hardware (on TRC rising edge). 00122 In this example, a software COM event is generated each 100 ms: using the SysTick 00123 interrupt. 00124 The TIM1 is configured in Timing Mode, each time a COM event occurs, a new TIM1 00125 configuration will be set in advance. 00126 00127 The following Table describes the TIM1 Channels states: 00128 ----------------------------------------------- 00129 | Step1 | Step2 | Step3 | Step4 | Step5 | Step6 | 00130 ---------------------------------------------------------- 00131 |Channel1 | 1 | 0 | 0 | 0 | 0 | 1 | 00132 ---------------------------------------------------------- 00133 |Channel1N | 0 | 0 | 1 | 1 | 0 | 0 | 00134 ---------------------------------------------------------- 00135 |Channel2 | 0 | 0 | 0 | 1 | 1 | 0 | 00136 ---------------------------------------------------------- 00137 |Channel2N | 1 | 1 | 0 | 0 | 0 | 0 | 00138 ---------------------------------------------------------- 00139 |Channel3 | 0 | 1 | 1 | 0 | 0 | 0 | 00140 ---------------------------------------------------------- 00141 |Channel3N | 0 | 0 | 0 | 0 | 1 | 1 | 00142 ---------------------------------------------------------- 00143 ----------------------------------------------------------------------------*/ 00144 00145 /* Time Base configuration */ 00146 TIM_TimeBaseStructure.TIM_Prescaler = 0; 00147 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; 00148 TIM_TimeBaseStructure.TIM_Period = 4095; 00149 TIM_TimeBaseStructure.TIM_ClockDivision = 0; 00150 TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; 00151 00152 TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); 00153 00154 /* Channel 1, 2,3 and 4 Configuration in PWM mode */ 00155 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Timing; 00156 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; 00157 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; 00158 TIM_OCInitStructure.TIM_Pulse = 2047; 00159 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; 00160 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; 00161 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; 00162 TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Set; 00163 00164 TIM_OC1Init(TIM1, &TIM_OCInitStructure); 00165 00166 TIM_OCInitStructure.TIM_Pulse = 1023; 00167 TIM_OC2Init(TIM1, &TIM_OCInitStructure); 00168 00169 TIM_OCInitStructure.TIM_Pulse = 511; 00170 TIM_OC3Init(TIM1, &TIM_OCInitStructure); 00171 00172 /* Automatic Output enable, Break, dead time and lock configuration*/ 00173 TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable; 00174 TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable; 00175 TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF; 00176 TIM_BDTRInitStructure.TIM_DeadTime = 1; 00177 TIM_BDTRInitStructure.TIM_Break = TIM_Break_Enable; 00178 TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High; 00179 TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable; 00180 00181 TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure); 00182 00183 TIM_CCPreloadControl(TIM1, ENABLE); 00184 00185 TIM_ITConfig(TIM1, TIM_IT_COM, ENABLE); 00186 00187 /* TIM1 counter enable */ 00188 TIM_Cmd(TIM1, ENABLE); 00189 00190 /* Main Output Enable */ 00191 TIM_CtrlPWMOutputs(TIM1, ENABLE); 00192 00193 /* Enable the TIM1 Trigger and commutation interrupt */ 00194 NVIC_InitStructure.NVIC_IRQChannel = TIM1_BRK_UP_TRG_COM_IRQn; 00195 NVIC_InitStructure.NVIC_IRQChannelPriority = 0; 00196 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 00197 NVIC_Init(&NVIC_InitStructure); 00198 } 00199 00200 /** 00201 * @brief Configures the SysTick. 00202 * @param None 00203 * @retval None 00204 */ 00205 static void SysTickConfig(void) 00206 { 00207 /* Setup SysTick Timer for 100 msec interrupts */ 00208 if (SysTick_Config((SystemCoreClock) / 10)) 00209 { 00210 /* Capture error */ 00211 while (1); 00212 } 00213 00214 NVIC_SetPriority(SysTick_IRQn, 0x0); 00215 } 00216 00217 #ifdef USE_FULL_ASSERT 00218 00219 /** 00220 * @brief Reports the name of the source file and the source line number 00221 * where the assert_param error has occurred. 00222 * @param file: pointer to the source file name 00223 * @param line: assert_param error line source number 00224 * @retval None 00225 */ 00226 void assert_failed(uint8_t* file, uint32_t line) 00227 { 00228 /* User can add his own implementation to report the file name and line number, 00229 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ 00230 00231 /* Infinite loop */ 00232 while (1) 00233 { 00234 } 00235 } 00236 #endif 00237 00238 /** 00239 * @} 00240 */ 00241 00242 /** 00243 * @} 00244 */ 00245 00246 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/