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STM32F0xx Standard Peripherals Firmware Library
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STM32F0xx_StdPeriph_Examples/DAC/DAC_SignalsGeneration/main.c
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00001 /** 00002 ****************************************************************************** 00003 * @file DAC/DAC_SignalsGeneration/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 DAC_SignalsGeneration 00036 * @{ 00037 */ 00038 00039 /* Private typedef -----------------------------------------------------------*/ 00040 /* Private define ------------------------------------------------------------*/ 00041 #define DAC_DHR12R1_ADDRESS 0x40007408 00042 #define DAC_DHR8R2_ADDRESS 0x4000741C 00043 #define DAC_DHR8R1_ADDRESS 0x40007410 00044 00045 /* Private macro -------------------------------------------------------------*/ 00046 /* Private variables ---------------------------------------------------------*/ 00047 DAC_InitTypeDef DAC_InitStructure; 00048 DMA_InitTypeDef DMA_InitStructure; 00049 const uint16_t Sine12bit[32] = { 00050 2047, 2447, 2831, 3185, 3498, 3750, 3939, 4056, 4095, 4056, 00051 3939, 3750, 3495, 3185, 2831, 2447, 2047, 1647, 1263, 909, 00052 599, 344, 155, 38, 0, 38, 155, 344, 599, 909, 1263, 1647}; 00053 const uint8_t Escalator8bit[6] = {0x0, 0x33, 0x66, 0x99, 0xCC, 0xFF}; 00054 uint8_t Idx = 0; 00055 __IO uint8_t SelectedWavesForm = 1; 00056 __IO uint8_t WaveChange = 1; 00057 00058 /* Private function prototypes -----------------------------------------------*/ 00059 static void DAC_Config(void); 00060 static void TIM_Config(void); 00061 /* Private functions ---------------------------------------------------------*/ 00062 00063 /** 00064 * @brief Main program. 00065 * @param None 00066 * @retval None 00067 */ 00068 int main(void) 00069 { 00070 /*!< At this stage the microcontroller clock setting is already configured, 00071 this is done through SystemInit() function which is called from startup 00072 file (startup_stm32f0xx.s) before to branch to application main. 00073 To reconfigure the default setting of SystemInit() function, refer to 00074 system_stm32f0xx.c file 00075 */ 00076 00077 /* Preconfiguration before using DAC----------------------------------------*/ 00078 DAC_Config(); 00079 00080 /* TIM2 configuration */ 00081 TIM_Config(); 00082 00083 /* Configures Button GPIO and EXTI Line */ 00084 STM_EVAL_PBInit(BUTTON_TAMPER, BUTTON_MODE_EXTI); 00085 00086 /* Infinite loop */ 00087 while (1) 00088 { 00089 /* If the wave form is changed */ 00090 if (WaveChange == 1) 00091 { 00092 /* Switch the selected waves forms according the Button status */ 00093 if (SelectedWavesForm == 1) 00094 { 00095 #if defined (STM32F072) || defined (STM32F091) 00096 /* The sine wave has been selected */ 00097 /* Sine Wave generator ---------------------------------------------*/ 00098 DAC_DeInit(); 00099 00100 /* DAC channel1 Configuration */ 00101 DAC_InitStructure.DAC_Trigger = DAC_Trigger_T2_TRGO; 00102 DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_LFSRUnmask_Bits11_0; 00103 DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable; 00104 DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None; 00105 00106 /* DMA channel3 Configuration */ 00107 DMA_DeInit(DMA1_Channel3); 00108 DMA_InitStructure.DMA_PeripheralBaseAddr = DAC_DHR12R1_ADDRESS; 00109 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&Sine12bit; 00110 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST; 00111 DMA_InitStructure.DMA_BufferSize = 32; 00112 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; 00113 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; 00114 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; 00115 DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; 00116 DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; 00117 DMA_InitStructure.DMA_Priority = DMA_Priority_High; 00118 DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; 00119 DMA_Init(DMA1_Channel3, &DMA_InitStructure); 00120 00121 /* Enable DMA1 Channel3 */ 00122 DMA_Cmd(DMA1_Channel3, ENABLE); 00123 00124 /* DAC Channel1 Init */ 00125 DAC_Init(DAC_Channel_1, &DAC_InitStructure); 00126 00127 /* Enable DAC Channel1: Once the DAC channel1 is enabled, PA.04 is 00128 automatically connected to the DAC converter. */ 00129 DAC_Cmd(DAC_Channel_1, ENABLE); 00130 00131 /* Enable DMA for DAC Channel1 */ 00132 DAC_DMACmd(DAC_Channel_1, ENABLE); 00133 00134 00135 /* Escalator Wave generator ----------------------------------------*/ 00136 00137 /* DAC channel1 Configuration */ 00138 DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable; 00139 DAC_Init(DAC_Channel_2, &DAC_InitStructure); 00140 00141 /* DMA1 channel4 configuration */ 00142 DMA_DeInit(DMA1_Channel4); 00143 DMA_InitStructure.DMA_PeripheralBaseAddr = DAC_DHR8R2_ADDRESS; 00144 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&Escalator8bit; 00145 DMA_InitStructure.DMA_BufferSize = 6; 00146 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; 00147 DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; 00148 DMA_Init(DMA1_Channel4, &DMA_InitStructure); 00149 00150 /* Enable DMA1 Channel4 */ 00151 DMA_Cmd(DMA1_Channel4, ENABLE); 00152 00153 /* Enable DAC1 Channel1: Once the DAC1 channel2 is enabled, PA.05 is 00154 automatically connected to the DAC converter. */ 00155 DAC_Cmd(DAC_Channel_2, ENABLE); 00156 00157 /* Enable DMA for DAC Channel1 */ 00158 DAC_DMACmd(DAC_Channel_2, ENABLE); 00159 #else 00160 /* The sine wave has been selected */ 00161 /* Sine Wave generator ---------------------------------------------*/ 00162 DAC_DeInit(); 00163 00164 /* DAC channel1 Configuration */ 00165 DAC_InitStructure.DAC_Trigger = DAC_Trigger_T2_TRGO; 00166 DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable; 00167 00168 /* DMA channel3 Configuration */ 00169 DMA_DeInit(DMA1_Channel3); 00170 DMA_InitStructure.DMA_PeripheralBaseAddr = DAC_DHR12R1_ADDRESS; 00171 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&Sine12bit; 00172 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST; 00173 DMA_InitStructure.DMA_BufferSize = 32; 00174 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; 00175 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; 00176 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; 00177 DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; 00178 DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; 00179 DMA_InitStructure.DMA_Priority = DMA_Priority_High; 00180 DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; 00181 DMA_Init(DMA1_Channel3, &DMA_InitStructure); 00182 00183 /* Enable DMA1 Channel3 */ 00184 DMA_Cmd(DMA1_Channel3, ENABLE); 00185 00186 /* DAC Channel1 Init */ 00187 DAC_Init(DAC_Channel_1, &DAC_InitStructure); 00188 00189 /* Enable DAC Channel1: Once the DAC channel1 is enabled, PA.04 is 00190 automatically connected to the DAC converter. */ 00191 DAC_Cmd(DAC_Channel_1, ENABLE); 00192 00193 /* Enable DMA for DAC Channel1 */ 00194 DAC_DMACmd(DAC_Channel_1, ENABLE); 00195 #endif /* STM32F072 || STM32F091*/ 00196 00197 } 00198 else 00199 { 00200 #if defined (STM32F072) || defined (STM32F091) 00201 /* Noise Wave generator --------------------------------------------*/ 00202 /* DAC channel1 Configuration */ 00203 DAC_DeInit(); 00204 DAC_InitStructure.DAC_Trigger = DAC_Trigger_T2_TRGO; 00205 DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_Noise; 00206 DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_LFSRUnmask_Bits11_0; 00207 DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable; 00208 DAC_Init(DAC_Channel_1, &DAC_InitStructure); 00209 00210 /* Enable DAC Channel1: Once the DAC channel1 is enabled, PA.05 is 00211 automatically connected to the DAC converter. */ 00212 DAC_Cmd(DAC_Channel_1, ENABLE); 00213 00214 /* Set DAC Channel1 DHR12L register */ 00215 DAC_SetChannel1Data(DAC_Align_12b_L, 0x7FF0); 00216 00217 /* Enable DAC channel1 wave generator */ 00218 DAC_WaveGenerationCmd(DAC_Channel_1, DAC_Wave_Noise , ENABLE); 00219 00220 /* Triangle Wave generator -----------------------------------------*/ 00221 00222 /* DAC channel2 Configuration */ 00223 DAC_InitStructure.DAC_Trigger = DAC_Trigger_T2_TRGO; 00224 DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_Triangle; 00225 DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_TriangleAmplitude_1023; 00226 DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable; 00227 DAC_Init(DAC_Channel_2, &DAC_InitStructure); 00228 00229 /* Enable DAC Channel2: Once the DAC channel2 is enabled, PA.05 is 00230 automatically connected to the DAC converter. */ 00231 DAC_Cmd(DAC_Channel_2, ENABLE); 00232 00233 /* Set DAC channel2 DHR12RD register */ 00234 DAC_SetChannel2Data(DAC_Align_12b_R, 0x100); 00235 #else 00236 /* Escalator Wave generator -----------------------------------------*/ 00237 DAC_DeInit(); 00238 00239 /* DAC channel1 Configuration */ 00240 DAC_InitStructure.DAC_Trigger = DAC_Trigger_T2_TRGO; 00241 DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable; 00242 00243 00244 /* DMA1 channel2 configuration */ 00245 DMA_DeInit(DMA1_Channel3); 00246 00247 DMA_InitStructure.DMA_PeripheralBaseAddr = DAC_DHR8R1_ADDRESS; 00248 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&Escalator8bit; 00249 DMA_InitStructure.DMA_BufferSize = 6; 00250 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; 00251 DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; 00252 DMA_Init(DMA1_Channel3, &DMA_InitStructure); 00253 00254 /* Enable DMA1 Channel2 */ 00255 DMA_Cmd(DMA1_Channel3, ENABLE); 00256 00257 /* DAC channel1 Configuration */ 00258 DAC_Init(DAC_Channel_1, &DAC_InitStructure); 00259 00260 /* Enable DAC Channel1: Once the DAC channel1 is enabled, PA.04 is 00261 automatically connected to the DAC converter. */ 00262 DAC_Cmd(DAC_Channel_1, ENABLE); 00263 00264 /* Enable DMA for DAC Channel1 */ 00265 DAC_DMACmd(DAC_Channel_1, ENABLE); 00266 #endif /* STM32F072 || STM32F091*/ 00267 } 00268 WaveChange = !WaveChange; 00269 } 00270 } 00271 } 00272 00273 /** 00274 * @brief PrecConfiguration: configure PA4 in analog, 00275 * enable DAC clock, enable DMA1 clock 00276 * @param None 00277 * @retval None 00278 */ 00279 static void DAC_Config(void) 00280 { 00281 GPIO_InitTypeDef GPIO_InitStructure; 00282 00283 /* DMA1 clock enable (to be used with DAC) */ 00284 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); 00285 00286 /* DAC Periph clock enable */ 00287 RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE); 00288 00289 /* GPIOA clock enable */ 00290 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE); 00291 00292 /* Configure PA.04 (DAC_OUT1) as analog */ 00293 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4; 00294 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN; 00295 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; 00296 GPIO_Init(GPIOA, &GPIO_InitStructure); 00297 00298 #if defined (STM32F072) || defined (STM32F091) 00299 /* Configure PA.05 (DAC_OUT2) as analog */ 00300 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; 00301 GPIO_Init(GPIOA, &GPIO_InitStructure); 00302 #endif 00303 } 00304 00305 /** 00306 * @brief TIM2 Configuration 00307 * @param None 00308 * @retval None 00309 */ 00310 static void TIM_Config(void) 00311 { 00312 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; 00313 00314 /* TIM2 Periph clock enable */ 00315 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); 00316 00317 /* Time base configuration */ 00318 TIM_TimeBaseStructInit(&TIM_TimeBaseStructure); 00319 TIM_TimeBaseStructure.TIM_Period = 0xFF; 00320 TIM_TimeBaseStructure.TIM_Prescaler = 0x0; 00321 TIM_TimeBaseStructure.TIM_ClockDivision = 0x0; 00322 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; 00323 TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); 00324 00325 /* TIM2 TRGO selection */ 00326 TIM_SelectOutputTrigger(TIM2, TIM_TRGOSource_Update); 00327 00328 /* TIM2 enable counter */ 00329 TIM_Cmd(TIM2, ENABLE); 00330 } 00331 00332 #ifdef USE_FULL_ASSERT 00333 00334 /** 00335 * @brief Reports the name of the source file and the source line number 00336 * where the assert_param error has occurred. 00337 * @param file: pointer to the source file name 00338 * @param line: assert_param error line source number 00339 * @retval None 00340 */ 00341 void assert_failed(uint8_t* file, uint32_t line) 00342 { 00343 /* User can add his own implementation to report the file name and line number, 00344 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ 00345 00346 /* Infinite loop */ 00347 while (1) 00348 { 00349 } 00350 } 00351 #endif 00352 00353 /** 00354 * @} 00355 */ 00356 00357 /** 00358 * @} 00359 */ 00360 00361 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/