W moim układzie nie ma dwóch kanałów DMA, przez co tylko ADC moje być obsłużony przez DMA. Ale nic straconego – od czego są wątki w systemach Realtime.
Przewody i MX
Podłączamy dwa urządzenia z wyjściem AO (w moim przypadku czujnik dźwięku i żyroskop), odpowiednio do złącz AO i A1 w STM32.
Konfigurujemy piny (u mnie to PA0 -> ADC1_IN0, PA1 ->ADC2_IN1). Z założenia chcemy obsłużyć OBA przetworniki naraz.
ADC1 konfigurujemy jak w poprzednim przykładzie (DMA itp.), natomiast ADC2 nie posiada opcji DMA, zostawiamy ustawienia domyślne (IN1 checkbox).
Dwa wątki
Napiszemy dwa wątki do symulacji mechanizmu DMA, pierwszy będzie wypełniał bufor (adc2_buf) w odstępach 1ms [0-1023]. W połowie pracy ustawiana jest odpowiednia flaga na 1 i wtedy drugi wątek przystępuje do analizy zapisanych danych. Na koniec pracy ustawia flagę na 0, stąd pierwszy wątek wie, że znowu można pisać w 1szej części tablicy [0-512]. Analogicznie potraktowana jest druga połowa tablicy. Dlatego jak pierwszy wątek pisze na początku, to drugi działa w drugiej połowie i na odwrót.
Cały kod wygląda tak:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 | /* USER CODE BEGIN Header */ /** ****************************************************************************** * @file : main.c * @brief : Main program body ****************************************************************************** * @attention * * <center>© Copyright (c) 2020 STMicroelectronics. * All rights reserved.</center>* * This software component is licensed by ST under BSD 3-Clause license, * the "License"; You may not use this file except in compliance with the * License. You may obtain a copy of the License at: * opensource.org/licenses/BSD-3-Clause * ****************************************************************************** */ /* USER CODE END Header */ /* Includes ------------------------------------------------------------------*/ #include "main.h" /* Private includes ----------------------------------------------------------*/ /* USER CODE BEGIN Includes */ //FX Real Time Thread OS: #include "rtthread.h" #include "rthw.h" /* USER CODE END Includes */ /* Private typedef -----------------------------------------------------------*/ /* USER CODE BEGIN PTD */ /* USER CODE END PTD */ /* Private define ------------------------------------------------------------*/ /* USER CODE BEGIN PD */ #define ADC_BUF_LEN 4096 #define ADC2_BUF_LEN 1024 /* USER CODE END PD */ /* Private macro -------------------------------------------------------------*/ /* USER CODE BEGIN PM */ /* USER CODE END PM */ /* Private variables ---------------------------------------------------------*/ ADC_HandleTypeDef hadc1; ADC_HandleTypeDef hadc2; DMA_HandleTypeDef hdma_adc1; UART_HandleTypeDef huart2; /* USER CODE BEGIN PV */ //FX: uint16_t adc_buf[ADC_BUF_LEN]; //ADC DMA BUF uint16_t adc2_buf[ADC2_BUF_LEN];//max:2048 uint32_t counter1kHz = 0; extern int rtthread_startup(void); void rt_hw_console_output(const char *str) { HAL_UART_Transmit(&huart2, (uint8_t*)str, rt_strlen(str), 1000); if(str[ rt_strlen(str) - 1 ] == '\n') { char back_r[2]; rt_strncpy(back_r, "\r", 1); HAL_UART_Transmit(&huart2, (uint8_t*)back_r, rt_strlen(back_r), 1000); } } /* USER CODE END PV */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); static void MX_GPIO_Init(void); static void MX_DMA_Init(void); static void MX_USART2_UART_Init(void); static void MX_ADC1_Init(void); static void MX_ADC2_Init(void); /* USER CODE BEGIN PFP */ /* USER CODE END PFP */ /* Private user code ---------------------------------------------------------*/ /* USER CODE BEGIN 0 */ //FX: rt_thread_t write_buffer_thread; rt_thread_t process_buffer_thread; volatile uint8_t adc2_half_buffer = 0, adc2_full_buffer = 0; //if adc2 buffer is half full void write_buffer_thread_entry(void* parameter) { //thread1 - ADC2 conversion HAL_ADC_Start(&hadc2); int adc2_i=0; while(1){ if(HAL_ADC_PollForConversion(&hadc2,10) == HAL_OK) //timeout:10 { while ((adc2_i < ADC2_BUF_LEN/2 && adc2_half_buffer) || (adc2_i >= ADC2_BUF_LEN/2 && adc2_full_buffer)) //wait for 2 thread to finish the job of processing buffers { rt_kprintf("-FULL BUFFER -"); rt_thread_delay(1); } adc2_buf[adc2_i++] = HAL_ADC_GetValue(&hadc2); //read next value from ADC if (adc2_i == ADC2_BUF_LEN) //end of buffer { adc2_i = 0; adc2_full_buffer = 1; //set FLAG - FULL BUFFER for thread2 } else if (adc2_i == ADC2_BUF_LEN/2) //0-511 (now is 512 but not read yet) { adc2_half_buffer = 1; } HAL_ADC_Start(&hadc2); rt_thread_mdelay(1); }//if HALADC }//while } void process_buffer_thread_entry(void* parameter) { //watek 2 while(1){ if (adc2_full_buffer) //512-1023 { for (int i= (ADC2_BUF_LEN >> 1); i<ADC2_BUF_LEN; i++) { //process half buffer 512->1023 if (adc2_buf[i] > 0 && adc2_buf[i] < 3800) rt_kprintf("%i/",adc2_buf[i]); } adc2_full_buffer = 0; //processed - flag change } else if (adc2_half_buffer)//0-511 { for (int i=0 ; i<(ADC2_BUF_LEN >> 1); i++) { //process half buffer 0->512 if (adc2_buf[i] > 0 && adc2_buf[i] < 3800) rt_kprintf("%i/",adc2_buf[i]); } adc2_half_buffer = 0; //processed - flag change } rt_thread_mdelay(100); //musi byc przerwa w obsludze 2 watku } } void run_2_threads(void) { //Uruchamia oba watki write_buffer_thread = rt_thread_create( "writeBuffer", write_buffer_thread_entry, RT_NULL, 512, 3, 20 ); if(write_buffer_thread != RT_NULL) rt_thread_startup(write_buffer_thread); process_buffer_thread = rt_thread_create( "processBuffer", process_buffer_thread_entry, RT_NULL, 512, 3, 20 ); if(process_buffer_thread != RT_NULL) /* ???????,????? */ rt_thread_startup(process_buffer_thread); } /* USER CODE END 0 */ /** * @brief The application entry point. * @retval int */ int main(void) { /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /* MCU Configuration--------------------------------------------------------*/ /* Reset of all peripherals, Initializes the Flash interface and the Systick. */ HAL_Init(); /* USER CODE BEGIN Init */ /* USER CODE END Init */ /* Configure the system clock */ SystemClock_Config(); /* USER CODE BEGIN SysInit */ /* USER CODE END SysInit */ /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_DMA_Init(); MX_USART2_UART_Init(); MX_ADC1_Init(); MX_ADC2_Init(); /* USER CODE BEGIN 2 */ run_2_threads(); //run ADC2 threads /* show RT-Thread version UART2 console */ rt_kprintf("\n\rLOADING...\n"); rt_show_version(); HAL_ADC_Start_DMA(&hadc1, (uint32_t*)adc_buf, ADC_BUF_LEN); /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { /* USER CODE END WHILE */ rt_thread_delay(1); /* USER CODE BEGIN 3 */ } /* USER CODE END 3 */ } /** * @brief System Clock Configuration * @retval None */ void SystemClock_Config(void) { RCC_OscInitTypeDef RCC_OscInitStruct = {0}; RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; RCC_PeriphCLKInitTypeDef PeriphClkInit = {0}; /** Initializes the RCC Oscillators according to the specified parameters * in the RCC_OscInitTypeDef structure. */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1; RCC_OscInitStruct.HSIState = RCC_HSI_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL2; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { Error_Handler(); } /** Initializes the CPU, AHB and APB buses clocks */ RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK) { Error_Handler(); } PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC; PeriphClkInit.AdcClockSelection = RCC_ADCPCLK2_DIV2; if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) { Error_Handler(); } } /** * @brief ADC1 Initialization Function * @param None * @retval None */ static void MX_ADC1_Init(void) { /* USER CODE BEGIN ADC1_Init 0 */ /* USER CODE END ADC1_Init 0 */ ADC_ChannelConfTypeDef sConfig = {0}; /* USER CODE BEGIN ADC1_Init 1 */ /* USER CODE END ADC1_Init 1 */ /** Common config */ hadc1.Instance = ADC1; hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE; hadc1.Init.ContinuousConvMode = ENABLE; hadc1.Init.DiscontinuousConvMode = DISABLE; hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START; hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT; hadc1.Init.NbrOfConversion = 1; if (HAL_ADC_Init(&hadc1) != HAL_OK) { Error_Handler(); } /** Configure Regular Channel */ sConfig.Channel = ADC_CHANNEL_0; sConfig.Rank = ADC_REGULAR_RANK_1; sConfig.SamplingTime = ADC_SAMPLETIME_239CYCLES_5; if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) { Error_Handler(); } /* USER CODE BEGIN ADC1_Init 2 */ /* USER CODE END ADC1_Init 2 */ } /** * @brief ADC2 Initialization Function * @param None * @retval None */ static void MX_ADC2_Init(void) { /* USER CODE BEGIN ADC2_Init 0 */ /* USER CODE END ADC2_Init 0 */ ADC_ChannelConfTypeDef sConfig = {0}; /* USER CODE BEGIN ADC2_Init 1 */ /* USER CODE END ADC2_Init 1 */ /** Common config */ hadc2.Instance = ADC2; hadc2.Init.ScanConvMode = ADC_SCAN_DISABLE; hadc2.Init.ContinuousConvMode = DISABLE; //? hadc2.Init.DiscontinuousConvMode = DISABLE; hadc2.Init.ExternalTrigConv = ADC_SOFTWARE_START; hadc2.Init.DataAlign = ADC_DATAALIGN_RIGHT; hadc2.Init.NbrOfConversion = 1; if (HAL_ADC_Init(&hadc2) != HAL_OK) { Error_Handler(); } /** Configure Regular Channel */ sConfig.Channel = ADC_CHANNEL_1; sConfig.Rank = ADC_REGULAR_RANK_1; sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5; if (HAL_ADC_ConfigChannel(&hadc2, &sConfig) != HAL_OK) { Error_Handler(); } /* USER CODE BEGIN ADC2_Init 2 */ /* USER CODE END ADC2_Init 2 */ } /** * @brief USART2 Initialization Function * @param None * @retval None */ static void MX_USART2_UART_Init(void) { /* USER CODE BEGIN USART2_Init 0 */ /* USER CODE END USART2_Init 0 */ /* USER CODE BEGIN USART2_Init 1 */ /* USER CODE END USART2_Init 1 */ huart2.Instance = USART2; huart2.Init.BaudRate = 115200; huart2.Init.WordLength = UART_WORDLENGTH_8B; huart2.Init.StopBits = UART_STOPBITS_1; huart2.Init.Parity = UART_PARITY_NONE; huart2.Init.Mode = UART_MODE_TX_RX; huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE; huart2.Init.OverSampling = UART_OVERSAMPLING_16; if (HAL_UART_Init(&huart2) != HAL_OK) { Error_Handler(); } /* USER CODE BEGIN USART2_Init 2 */ /* USER CODE END USART2_Init 2 */ } /** * Enable DMA controller clock */ static void MX_DMA_Init(void) { /* DMA controller clock enable */ __HAL_RCC_DMA1_CLK_ENABLE(); /* DMA interrupt init */ /* DMA1_Channel1_IRQn interrupt configuration */ HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0); HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn); } /** * @brief GPIO Initialization Function * @param None * @retval None */ static void MX_GPIO_Init(void) { GPIO_InitTypeDef GPIO_InitStruct = {0}; /* GPIO Ports Clock Enable */ __HAL_RCC_GPIOC_CLK_ENABLE(); __HAL_RCC_GPIOD_CLK_ENABLE(); __HAL_RCC_GPIOA_CLK_ENABLE(); __HAL_RCC_GPIOB_CLK_ENABLE(); /*Configure GPIO pin Output Level */ HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_RESET); /*Configure GPIO pin : B1_Pin */ GPIO_InitStruct.Pin = B1_Pin; GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING; GPIO_InitStruct.Pull = GPIO_NOPULL; HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct); /*Configure GPIO pin : LD2_Pin */ GPIO_InitStruct.Pin = LD2_Pin; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; HAL_GPIO_Init(LD2_GPIO_Port, &GPIO_InitStruct); /* EXTI interrupt init*/ HAL_NVIC_SetPriority(EXTI15_10_IRQn, 0, 0); HAL_NVIC_EnableIRQ(EXTI15_10_IRQn); } /* USER CODE BEGIN 4 */ //FX: void HAL_ADC_ConvHalfCpltCallback(ADC_HandleTypeDef* hadc) { HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_SET); uint32_t sum=0; uint16_t cycles=0; for (int i=0; i<2048; i++) sum += adc_buf[i]; sum >>= 11; // /= 2048; //srednia + dc sum += 20; //DC for (int i=0; i<2047; i++) { if(adc_buf[i] < sum && adc_buf[i+1] >= sum) cycles++; } if (cycles > 0) rt_kprintf("%lu,", cycles); } uint32_t prevClock = 0; // Called when buffer is completely filled void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc) { HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_RESET); uint32_t sum=0; uint16_t cycles=0; for (int i=0; i<2048; i++) sum += adc_buf[i]; sum >>=11; // 2048; //srednia + dc sum += 20; //DC for (int i=0; i<2047; i++) { if(adc_buf[i] < sum && adc_buf[i+1] >= sum) cycles++; } if (cycles > 0) rt_kprintf("%lu,", cycles); } void HAL_SYSTICK_Callback(){ //Clock system callback 1kHz counter1kHz++; } /* USER CODE END 4 */ /** * @brief This function is executed in case of error occurrence. * @retval None */ void Error_Handler(void) { /* USER CODE BEGIN Error_Handler_Debug */ /* User can add his own implementation to report the HAL error return state */ /* USER CODE END Error_Handler_Debug */ } #ifdef USE_FULL_ASSERT /** * @brief Reports the name of the source file and the source line number * where the assert_param error has occurred. * @param file: pointer to the source file name * @param line: assert_param error line source number * @retval None */ void assert_failed(uint8_t *file, uint32_t line) { /* USER CODE BEGIN 6 */ /* User can add his own implementation to report the file name and line number, tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ /* USER CODE END 6 */ } #endif /* USE_FULL_ASSERT */ |