stm32g031_PWM + LPF 信号发生器

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/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "dma.h"
#include "spi.h"
#include "tim.h"
#include "gpio.h"
#include "oled.h"
#include "bmp.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
 
/* USER CODE END Includes */
 
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
 
/* USER CODE END PTD */
 
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
static void setparameters(void);
void showbegin(void);
void startoutput(void);
void stopoutput(void);
void ShowAMP(double AMP);
void ShowFRE(uint16_t FRE);
void increaseamplitude(void);
void decreaseamplitude(void);
 
#define LEN 500
uint16_t    send_Buf[LEN] = {0};//数组内是PWM比较�?????
static  const   uint8_t sine_wave_value[LEN]={51,51,52,53,53,54,54,55,56,56,57,58,58,59,59,60,61,61,62,62,
                                              63,64,64,65,65,66,67,67,68,68,69,70,70,71,71,72,72,73,74,74,
                                              75,75,76,76,77,77,78,78,79,79,80,80,81,81,82,82,83,83,84,84,
                                              85,85,86,86,86,87,87,88,88,89,89,89,90,90,90,91,91,92,92,92,
                                              93,93,93,94,94,94,94,95,95,95,96,96,96,96,96,97,97,97,97,98,
                                              98,98,98,98,98,99,99,99,99,99,99,99,99,100,100,100,100,100,100,
                                              100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,
                                              100,99,99,99,99,99,99,99,99,98,98,98,98,98,98,97,97,97,97,96,
                                              96,96,96,96,95,95,95,94,94,94,94,93,93,93,92,92,92,91,91,90,
                                              90,90,89,89,89,88,88,87,87,86,86,86,85,85,84,84,83,83,82,82,
                                              81,81,80,80,79,79,78,78,77,77,76,76,75,75,74,74,73,72,72,71,
                                              71,70,70,69,68,68,67,67,66,65,65,64,64,63,62,62,61,61,60,59,
                                              59,58,58,57,56,56,55,54,54,53,53,52,51,51,50,49,49,48,47,47,
                                              46,46,45,44,44,43,42,42,41,41,40,39,39,38,38,37,36,36,35,35,
                                              34,33,33,32,32,31,30,30,29,29,28,28,27,26,26,25,25,24,24,23,
                                              23,22,22,21,21,20,20,19,19,18,18,17,17,16,16,15,15,14,14,14,
                                              13,13,12,12,11,11,11,10,10,10,9,9,8,8,8,7,7,7,6,6,6,6,5,5,5,
                                              4,4,4,4,4,3,3,3,3,2,2,2,2,2,2,1,1,1,1,1,1,1,1,0,0,0,0,0,0,
                                              0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,2,2,2,2,
                                              2,2,3,3,3,3,4,4,4,4,4,5,5,5,6,6,6,6,7,7,7,8,8,8,9,9,10,10,
                                              10,11,11,11,12,12,13,13,14,14,14,15,15,16,16,17,17,18,18,19,
                                              19,20,20,21,21,22,22,23,23,24,24,25,25,26,26,27,28,28,29,29,
                                              30,30,31,32,32,33,33,34,35,35,36,36,37,38,38,39,39,40,41,41,
                                              42,42,43,44,44,45,46,46,47,47,48,49,49,50,
                                              };
static  const   uint8_t triangle_wave_value[LEN] = {0,0,1,1,2,2,2,3,3,4,4,4,5,5,6,6,6,7,7,8,
        8,8,9,9,10,10,10,11,11,12,12,12,13,13,14,
        14,14,15,15,16,16,16,17,17,18,18,18,19,19,
        20,20,20,21,21,22,22,22,23,23,24,24,24,25,
        25,26,26,26,27,27,28,28,28,29,29,30,30,30,
        31,31,32,32,32,33,33,34,34,34,35,35,36,36,
        36,37,37,38,38,38,39,39,40,40,40,41,41,42,
        42,42,43,43,44,44,44,45,45,46,46,46,47,47,
        48,48,48,49,49,50,50,50,51,51,52,52,52,53,
        53,54,54,54,55,55,56,56,56,57,57,58,58,58,
        59,59,60,60,60,61,61,62,62,62,63,63,64,64,
        64,65,65,66,66,66,67,67,68,68,68,69,69,70,
        70,70,71,71,72,72,72,73,73,74,74,74,75,75,
        76,76,76,77,77,78,78,78,79,79,80,80,80,81,
        81,82,82,82,83,83,84,84,84,85,85,86,86,86,
        87,87,88,88,88,89,89,90,90,90,91,91,92,92,
        92,93,93,94,94,94,95,95,96,96,96,97,97,98,
        98,98,99,99,100,100,99,99,98,98,98,97,97,96,
        96,96,95,95,94,94,94,93,93,92,92,92,91,91,90,
        90,90,89,89,88,88,88,87,87,86,86,86,85,85,84,
        84,84,83,83,82,82,82,81,81,80,80,80,79,79,78,
        78,78,77,77,76,76,76,75,75,74,74,74,73,73,72,
        72,72,71,71,70,70,70,69,69,68,68,68,67,67,66,
        66,66,65,65,64,64,64,63,63,62,62,62,61,61,60,
        60,60,59,59,58,58,58,57,57,56,56,56,55,55,54,
        54,54,53,53,52,52,52,51,51,50,50,50,49,49,48,
        48,48,47,47,46,46,46,45,45,44,44,44,43,43,42,
        42,42,41,41,40,40,40,39,39,38,38,38,37,37,36,
        36,36,35,35,34,34,34,33,33,32,32,32,31,31,30,
        30,30,29,29,28,28,28,27,27,26,26,26,25,25,24,
        24,24,23,23,22,22,22,21,21,20,20,20,19,19,18,
        18,18,17,17,16,16,16,15,15,14,14,14,13,13,12,
        12,12,11,11,10,10,10,9,9,8,8,8,7,7,6,6,6,5,5,
        4,4,4,3,3,2,2,2,1,1,0,0,
};
 
uint16_t    NUM = 0;
uint16_t    BUTTONSTATE = 0;
uint16_t    WAVESTATE = 0; //波形
uint16_t    AMPSTATE = 0;
uint16_t    FRESTAYE = 0;
uint16_t    PUTSTATE = 0;
 
double  AMP = 1.65;
uint16_t    FRE = 2;
 
uint16_t    amplitude = 165;  // max = 165，幅�?????
uint16_t    frequency = 2000; //频率KHz
uint16_t    tim; //定时器自动装载�??
 
/* USER CODE END PD */
 
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
 
/* USER CODE END PM */
 
/* Private variables ---------------------------------------------------------*/
 
/* USER CODE BEGIN PV */
 
/* USER CODE END PV */
 
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
 
/* USER CODE END PFP */
 
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
 
/* 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_SPI2_Init();
  MX_TIM3_Init();
  /* USER CODE BEGIN 2 */
  OLED_Init();
  //OLED_ShowString(0, 6, "CH1", 8, 1);
  showbegin();
  setparameters();
 
  //OLED_Refresh();
 
  /* USER CODE END 2 */
 
  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */
      if(PUTSTATE==1){
               startoutput();
           }
           else{
               stopoutput();
           }
    /* 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};
 
  /** Configure the main internal regulator output voltage
  */
  HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
 
  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV1;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV1;
  RCC_OscInitStruct.PLL.PLLN = 8;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
  RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
  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_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
 
  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
}
 
/* USER CODE BEGIN 4 */
void HAL_GPIO_EXTI_Falling_Callback(uint16_t GPIO_Pin)
{
     if(GPIO_Pin == Astate_Pin)
     {
         if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_4)==0){
              NUM=NUM+1;
           }
           else{
              NUM=NUM-1;
           }
           switch(NUM%4){
           case 1:
              OLED_ShowString(0, 100, "Amplitude:", 8, 1);
              OLED_ShowString(0, 120, "Signal Output:", 8, 1);
              OLED_ShowString(0, 90, "Signal Wave:", 8, 0);
              OLED_Refresh();
              BUTTONSTATE=1;
              break;
           case 2:
              OLED_ShowString(0, 90, "Signal Wave:", 8, 1);
              OLED_ShowString(0, 110, "Frequency:", 8, 1);
              OLED_ShowString(0, 100, "Amplitude:", 8, 0);
              OLED_Refresh();
              BUTTONSTATE=2;
              break;
           case 3:
              OLED_ShowString(0, 100, "Amplitude:", 8, 1);
              OLED_ShowString(0, 120, "Signal Output:", 8, 1);
              OLED_ShowString(0, 110, "Frequency:", 8, 0);
              OLED_Refresh();
              BUTTONSTATE=3;
              break;
           case 0:
              OLED_ShowString(0, 110, "Frequency:", 8, 1);
              OLED_ShowString(0, 90, "Signal Wave:", 8, 1);
              OLED_ShowString(0, 120, "Signal Output:", 8, 0);
              OLED_Refresh();
              BUTTONSTATE=0;
              break;
           }
     }
     if(GPIO_Pin == KeyUp_Pin){
         switch(BUTTONSTATE){
            case 1:
                if(WAVESTATE>=3){
                    WAVESTATE=0;
                }
                else{
                    WAVESTATE++;
                }
                switch(WAVESTATE){
                   case 0:
                        OLED_ShowString(78, 90, "DC  ", 8, 1);
                        OLED_ShowPicture(0, 20, 128, 64, dc, 1);
                        OLED_Refresh();
                        setparameters();
                        break;
                   case 1:
                        OLED_ShowString(78, 90, "SINE", 8, 1);
                        OLED_ShowPicture(0, 20, 128, 64, sin, 1);
                        OLED_Refresh();
                        setparameters();
                        break;
                   case 2:
                        OLED_ShowString(78, 90, "SQUA", 8, 1);
                        OLED_ShowPicture(0, 20, 128, 64, sqr, 1);
                        OLED_Refresh();
                        setparameters();
                        break;
                   case 3:
                        OLED_ShowString(78, 90, "TRIA", 8, 1);
                        OLED_ShowPicture(0, 20, 128, 64, tri, 1);
                        OLED_Refresh();
                        setparameters();
                        break;
                }
                break;
            case 2:
                increaseamplitude();
                break;
            case 3:
                increasefreq();
                break;
            case 0:
             switch(PUTSTATE){
                case 0:
                   OLED_ShowString(90, 120, "ON ", 8, 1);
                   OLED_Refresh();
                   break;
                case 1:
                   OLED_ShowString(90, 120, "OFF", 8, 1);
                   OLED_Refresh();
                   break;
             }
             if(PUTSTATE>=1){
                 PUTSTATE=0;
             }
             else{
                 PUTSTATE++;
             }
                break;
         }
     }
     if(GPIO_Pin == KeyDown_Pin){
         switch(BUTTONSTATE){
            case 1:
                if(WAVESTATE <= 0){
                    WAVESTATE=3;
                }
                else{
                    WAVESTATE--;
                }
                switch(WAVESTATE){
                   case 0:
                        OLED_ShowString(78, 90, "DC  ", 8, 1);
                        OLED_ShowPicture(0, 20, 128, 64, dc, 1);
                        OLED_Refresh();
                        setparameters();
                        break;
                   case 1:
                        OLED_ShowString(78, 90, "SINE", 8, 1);
                        OLED_ShowPicture(0, 20, 128, 64, sin, 1);
                        OLED_Refresh();
                        setparameters();
                        break;
                   case 2:
                        OLED_ShowString(78, 90, "SQUA", 8, 1);
                        OLED_ShowPicture(0, 20, 128, 64, sqr, 1);
                        OLED_Refresh();
                        setparameters();
                        break;
                   case 3:
                        OLED_ShowString(78, 90, "TRIA", 8, 1);
                        OLED_ShowPicture(0, 20, 128, 64, tri, 1);
                        OLED_Refresh();
                        setparameters();
                        break;
                }
                break;
            case 2:
                decreaseamplitude();
                break;
            case 3:
                decreasefreq();
                break;
            case 0:
                switch(PUTSTATE){
                case 0:
                   OLED_ShowString(90, 120, "ON ", 8, 1);
                   OLED_Refresh();
                   break;
                case 1:
                   OLED_ShowString(90, 120, "OFF", 8, 1);
                   OLED_Refresh();
                   break;
                }
                if(PUTSTATE<=0){
                 PUTSTATE=1;
                }
                else{
                 PUTSTATE--;
                }
                break;
         }
     }
}
void showbegin(void){
      OLED_ShowPicture(0, 20, 128, 64, dc, 1);
      OLED_ShowString(0, 0, "Signal Generator", 16, 1);
      OLED_ShowString(0, 90, "Signal Wave:", 8, 1);
      OLED_ShowString(78, 90, "DC  ", 8, 1);
      OLED_ShowString(0, 100, "Amplitude:", 8, 1);
      OLED_ShowString(66, 100, "3.00V", 8, 1);
      OLED_ShowString(0, 110, "Frequency:", 8, 1);
      OLED_ShowString(66, 110, "2KHz", 8, 1);
      OLED_ShowString(0, 120, "Signal Output:", 8, 1);
      OLED_ShowString(90, 120, "---", 8, 1);
      OLED_Refresh();
}
 
void ShowAMP(double AMP)
{
    char str[5];
    sprintf(str, "%.2fV", AMP);
    OLED_ShowString(66, 100, str, 8, 1);
    OLED_Refresh();
}
 
void ShowFRE(uint16_t FRE)
{
    char str[6];
    sprintf(str, "%dKHz", FRE);
    OLED_ShowString(66, 110, str, 8, 1);
    OLED_Refresh();
}
 
void startoutput(void){
    HAL_TIM_PWM_Start_DMA(&htim3, TIM_CHANNEL_3,(uint16_t*)send_Buf,LEN);
}
 
void stopoutput(void){
    HAL_TIM_PWM_Stop_DMA(&htim3, TIM_CHANNEL_3);
}
 
void increaseamplitude(void){
    if (amplitude < 165)
    {
        amplitude = amplitude + 15;
        if(WAVESTATE == 0){
            AMP =(double) ( 3*((double)amplitude / (double)165 ));
        }
        else{
            AMP = (double)((0.5*tim * amplitude / 165 + tim/2 )/tim*3-1.5);
        }
        setparameters();
        ShowAMP(AMP);
    }
}
 
void decreaseamplitude(void){
    if (amplitude > 0)
    {
        amplitude = amplitude - 15;
        if(WAVESTATE == 0){
            AMP = (double) ( 3*((double)amplitude / (double)165 ));
        }
        else{
            AMP = (double)((0.5*tim * amplitude / 165 + tim/2 )/tim*3-1.5);
        }
        setparameters();
        ShowAMP(AMP);
    }
}
 
void increasefreq(void){
    if (frequency < 100000)
    {
        frequency += 1000;
        FRE=frequency/1000;
        setparameters();
        ShowFRE(FRE);
    }
}
 
void decreasefreq(void){
    if (frequency > 100)
    {
        frequency -= 1000;
        FRE=frequency/1000;
        setparameters();
        ShowFRE(FRE);
    }
}
 
static void setparameters(void){
    uint16_t i;
    tim = 64000000 / LEN / frequency;// ARR
 
    TIM3->CNT = 0;
    __HAL_TIM_SET_AUTORELOAD(&htim3, (tim-1));
 
    switch(WAVESTATE){
        case 0:
            for (i = 0; i < LEN; i++){
                send_Buf[i]=(uint16_t)((50*amplitude/165) * (tim-1) / 50);//直流
            }
            break;
        case 1:
            for (i = 0; i < LEN; i++){
                send_Buf[i]=(uint16_t)((sine_wave_value[i]-50) * (tim -1) / 100 * (amplitude) / 165 + tim /2);//sin
            }
            break;
        case 2:
            for (i = 0; i < LEN; i++){
                send_Buf[i]=(uint16_t)((50 + 50*(amplitude)/165 * (i<LEN/2?1:-1)) * (tim-1) / 100);//方波
            }
            break;
        case 3:
            for (i = 0; i < LEN; i++){
                send_Buf[i]=(uint16_t)((triangle_wave_value[i]-50) * tim / 100 * (amplitude) / 165 + tim /2);//三角�????
            }
            break;
        default:
            break;
    }
}
 
/* 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 */
  __disable_irq();
  while (1)
  {
  }
  /* 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,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */