COMO CREAR TU PROPIO PLC con STM32 – 8 Entradas Digitales, 2 Entradas Analogicas, 6 Salidas a Relay, 3 Salidas PWM

Si bien es cierto, ya habíamos realizado una serie de tarjetas plc con microcontroladores de atmel y de esp32,  pero aún no habíamos logrado hacer con los microcontroladores de stm32. Asi que hoy vamos a desbloquear ese miedo y haremos un plc con un microcontrolador de la familia stm32. entonces, empezaremos haciendo un plc específicamente con el microcontrolador stm32F103C8T6, que es un microcontrolador básico de esta familia, y según vamos avanzando con las versiones, iremos desarrollando con otros micros más potentes de esta línea.

1. Tensión de alimentación……………………….…………24VDC
2. Corriente de alimentación………………….……………90mA
3. Entadas digitales 15-24VDC……………………….……8
4. Salidas RLY…………………………………………………………6
   • • Tensión AC…………..……….………………….….……250V
     • Corriente AC…………………………………………….5A
     • Tensión DC………………………………………………30V
     • Corriente DC……………………………………………5A
5. Salidas PMW (24V)……………………………………………………………3
6. Entorno de programación………………………..………..STM32 cube, Arduino IDE
7. Condiciones ambientales min……………………….….-40°
8. Condiciones ambientales max…………………..……….150°
9.  Empotrable………………………………….……………………Sí
10. Puerto Usb…………………………………………………………………SÍ
11. Comunicacion I2C……………………………………………………..Sí

TEST ENTRADAS DIGITALES Y SALIDAS A RELAY

#include "main.h"

void SystemClock_Config(void);
static void MX_GPIO_Init(void);

int main(void)
{

  HAL_Init();

  SystemClock_Config();

  MX_GPIO_Init();

  while (1)
  {
        GPIO_PinState buttonStates[6];
        GPIO_TypeDef* buttonPorts[6] = {GPIOB, GPIOB, GPIOB, GPIOB, GPIOB, GPIOB};
        uint16_t buttonPins[6] = {GPIO_PIN_0, GPIO_PIN_1, GPIO_PIN_2, GPIO_PIN_10, GPIO_PIN_11, GPIO_PIN_12};

        GPIO_TypeDef* ledPorts[6] = {GPIOB, GPIOA, GPIOA, GPIOB, GPIOB, GPIOB};
        uint16_t ledPins[6] = {GPIO_PIN_15, GPIO_PIN_8, GPIO_PIN_15, GPIO_PIN_3, GPIO_PIN_4, GPIO_PIN_5};

        for (int i = 0; i < 6; i++) {
          buttonStates[i] = HAL_GPIO_ReadPin(buttonPorts[i], buttonPins[i]);
          HAL_GPIO_WritePin(ledPorts[i], ledPins[i], (buttonStates[i] == GPIO_PIN_SET) ? GPIO_PIN_SET : GPIO_PIN_RESET);
        }
  }
}

void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  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_MUL9;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  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_2) != HAL_OK)
  {
    Error_Handler();
  }
}

static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};

  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOD_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();

  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_15|GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5, GPIO_PIN_RESET);

  HAL_GPIO_WritePin(GPIOA, GPIO_PIN_8|GPIO_PIN_15, GPIO_PIN_RESET);

  GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_10
                          |GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /*Configure GPIO pins : PB15 PB3 PB4 PB5 */
  GPIO_InitStruct.Pin = GPIO_PIN_15|GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /*Configure GPIO pins : PA8 PA15 */
  GPIO_InitStruct.Pin = GPIO_PIN_8|GPIO_PIN_15;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

}

void Error_Handler(void)
{

  __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 */

LECTURA ANALOGICA Y SALIDA PWM (LCD I2C)

#include "main.h"
#include "adc.h"
#include "i2c.h"
#include "tim.h"
#include "gpio.h"
#include "Lcd_i2c.h"

#include "stdio.h"

char buf_lcd[18];

uint8_t duty_pwm = 0;
uint8_t porcentaje_duty = 0;

void SystemClock_Config(void);

int main(void)
{

  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();
  MX_ADC1_Init();
  MX_TIM2_Init();
  MX_I2C1_Init();
  HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_1);
  __HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_1,0);
  Lcd_Init();
  while (1)
  {
HAL_ADC_Start(&hadc1);
int valor_adc = HAL_ADC_GetValue(&hadc1);

duty_pwm = (uint8_t)((valor_adc*99)/4095);
porcentaje_duty =  (uint8_t)((duty_pwm*100)/99);

__HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_1,duty_pwm);

Lcd_Set_Cursor(1,1);
sprintf(buf_lcd, "Analog in: %u ", valor_adc);
Lcd_Send_String(buf_lcd);
Lcd_Set_Cursor(2,1);
sprintf(buf_lcd, "pwm: %u ", duty_pwm);
Lcd_Send_String(buf_lcd);

HAL_Delay(50);

  }
  /* 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_MUL9;
  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_2) != HAL_OK)
  {
    Error_Handler();
  }
  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC;
  PeriphClkInit.AdcClockSelection = RCC_ADCPCLK2_DIV6;
  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
  {
    Error_Handler();
  }
}

/* USER CODE BEGIN 4 */

/* 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 */