/* USER CODE BEGIN Header */ /** ****************************************************************************** * @file : main.c * @brief : Main program body ****************************************************************************** * @attention * * Copyright (c) 2026 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** */ /* USER CODE END Header */ /* Includes ------------------------------------------------------------------*/ #include "main.h" #include "adc.h" #include "i2c.h" #include "tim.h" #include "usart.h" #include "gpio.h" /* Private includes ----------------------------------------------------------*/ /* USER CODE BEGIN Includes */ #include "ads1015_driver.h" #include "digital_outputs_driver.h" #include "ad5934_driver.h" #include "rs485_driver.h" #include /* USER CODE END Includes */ /* Private typedef -----------------------------------------------------------*/ /* USER CODE BEGIN PTD */ /* USER CODE END PTD */ /* Private define ------------------------------------------------------------*/ /* USER CODE BEGIN PD */ /* 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 */ void intToStr(int16_t N, uint8_t *str); void FloatToString(uint8_t * buf, double val); void Convert2Hex(uint32_t value, char *str); /* 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 */ uint8_t tempString[15] = {0}; uint8_t averages = 0; uint8_t newline = '\n'; // Variables for timing uint32_t previous_millis_green = 0; uint32_t previous_millis_red = 0; uint32_t current_millis; float reference_resistor_100R = 0, reference_resistor_1K = 0, temperature_RTD = 0, thermal_compensaded_EC = 0; float mag_rtd_reference = 0, mag_ec_reference = 0, mag_rtd = 0, mag_ec = 0; /* 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_ADC1_Init(); MX_ADC2_Init(); MX_I2C1_Init(); MX_I2C2_Init(); MX_USART1_UART_Init(); MX_TIM3_Init(); /* USER CODE BEGIN 2 */ HAL_TIM_Base_Start_IT(&htim3); HAL_GPIO_WritePin(GPIOB, GPIO_PIN_4, GPIO_PIN_SET); // LED Green Off HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_SET); // LED Red Off digital_outputs_init(); rs485_init(); ADG715_ResetChannels(); ADS1015_Init(); // Initializes pH Measurement AD5934_Init(); // Initializes CE and RTD Measurement /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while(averages<50) { AD5934_Process_System(); ADS1015_Process_System(); current_millis = g_ms_counter; if((current_millis % 20) == 0) // Send data each 40ms { averages++; } } digital_outputs_toggle(0); while (1) { AD5934_Process_System(); ADS1015_Process_System(); current_millis = g_ms_counter; if((current_millis % 500) == 0) // Send data each 100ms { if (g_rtd_filter.value_valid) // PT100 or PT1000 in °C { temperature_RTD = AD5934_Calculate_Temperature(g_ref_100R_LowGain_filter.filtered_value, g_ref_1K_MidGain_filter.filtered_value, g_rtd_filter.filtered_value);// AD5934_GetImpedance(mag_reference,mag_rtd);// //uint16_t rtd_final = AD5934_RTD_OUT_SCALE_MAX - AD5934_Compress_To_IntScale(g_rtd_filter.filtered_value, current_rtd_mux); //uint16_t rtd_final = AD5934_Compress_To_IntScale(temperature_RTD, current_rtd_mux); //intToStr(rtd_final, tempString); FloatToString(tempString, temperature_RTD); rs485_send_broadcast(tempString, (strlen((uint8_t*)tempString))); rs485_send_broadcast(&newline, 1); } if (g_ec_filter.value_valid) // EC { mag_ec = AD5934_GetAdmittance(g_ref_100R_MidGain_filter.filtered_value, g_ref_1K_MidGain_filter.filtered_value, g_ref_1K_HighGain_filter.filtered_value, g_ref_10K_HighGain_filter.filtered_value, g_ec_filter.filtered_value); thermal_compensaded_EC = AD5934_EC_Compensate_Magnitude_To_25C(mag_ec, temperature_RTD); //FloatToString(tempString, thermal_compensaded_EC); //rs485_send_broadcast(tempString, (strlen((uint8_t*)tempString))); //rs485_send_broadcast(&newline, 1); uint16_t ec_final = AD5934_Compress_To_IntScale(thermal_compensaded_EC, current_ec_mux); intToStr(ec_final, tempString); rs485_send_broadcast(tempString, (strlen((uint8_t*)tempString))); rs485_send_broadcast(&newline, 1); } if (g_ph_filter.value_valid) // pH { uint16_t ph_final = ADS1015_Compress_To_IntScale(g_ph_filter.filtered_value); intToStr(ph_final, tempString); //float ph_final = g_ph_filter.filtered_value; //FloatToString(tempString, ph_final); rs485_send_broadcast(tempString, (strlen((uint8_t*)tempString))); rs485_send_broadcast(&newline, 1); rs485_send_broadcast(&newline, 1); } rs485_send_broadcast(&newline, 1); } // Piscar LED verde em PB4 a cada 1 segundo if ((current_millis - previous_millis_green) >= 1000) { previous_millis_green = current_millis; HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_4); } /* // Piscar LED vermelho em PB5 a cada 0,5 segundos if ((current_millis - previous_millis_red) >= 500) { previous_millis_red = current_millis; HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_5); }*/ } /* USER CODE END WHILE */ /* 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.PLL.PLLState = RCC_PLL_NONE; 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_HSE; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; 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_DIV8; if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) { Error_Handler(); } } /* USER CODE BEGIN 4 */ /***************************************************************************//** * @brief Converts a float value to a character array with 3 digits of accuracy. * * @param *buf - returns the converterd value * @param val - value to be converted * * @return None. *******************************************************************************/ void FloatToString(uint8_t *buf, double val) { char temp[20]; // Buffer auxiliar para construção segura int i = 0; // 1. Tratar sinal negativo if (val < 0) { temp[i++] = '-'; val = -val; } // 2. Separar parte inteira e fracionária long intPart = (long)val; // Multiplicamos por 1000 para obter 3 casas decimais fixas int fracPart = (int)((val - (double)intPart) * 1000.0 + 0.5); // 3. Converter a parte inteira para o buffer temp // Usamos um buffer temporário de inversão para não precisar de lógica complexa de ponteiro char intRev[12]; int j = 0; if (intPart == 0) { intRev[j++] = '0'; } else { while (intPart > 0) { intRev[j++] = (intPart % 10) + '0'; intPart /= 10; } } // Inverter a parte inteira de volta para o buffer principal for (int k = j - 1; k >= 0; k--) { temp[i++] = intRev[k]; } // 4. Adicionar o ponto decimal e a parte fracionária (sempre 3 casas) temp[i++] = '.'; // Garantir que a parte fracionária tenha sempre 3 dígitos (ex: .005 em vez de .5) int fracBuffer[3]; fracBuffer[2] = fracPart % 10; // Unidade fracBuffer[1] = (fracPart / 10) % 10; // Dezena fracBuffer[0] = (fracPart / 100) % 10; // Centena for (int k = 0; k <= 2; k++) { temp[i++] = fracBuffer[k] + '0'; } // 5. Finalizar a string com o caractere nulo temp[i] = '\0'; // 6. Copiar para o buffer de destino final (sem risco de lixo) int destIdx = 0; while (temp[destIdx] != '\0' && destIdx < 15) { // Limite de segurança buf[destIdx] = temp[destIdx]; destIdx++; } buf[destIdx] = '\0'; } void intToStr(int16_t N, uint8_t *str) { int16_t i = 0; int16_t sign = N; uint8_t max_len = 15; // Tamanho máximo do buffer uint8_t width = 4; // mínimo 4 caracteres // Trata o caso do número zero isoladamente if (N == 0) { // Preenche com zeros à esquerda até atingir a largura desejada while (width > 1 && i < (max_len - 1)) { str[i++] = '0'; width--; } str[i++] = '0'; str[i] = '\0'; return; } if (N < 0) N = -N; // Extração dos dígitos while (N > 0) { if (i >= (max_len - 1)) break; // Proteção de estouro str[i++] = (N % 10) + '0'; N /= 10; } // Adiciona o sinal de menos se necessário if (sign < 0) { if (i < (max_len - 1)) str[i++] = '-'; } // Preenche com zeros à esquerda (considerando o espaço ocupado pelos dígitos e sinal) while (i < width && i < (max_len - 1)) { str[i++] = '0'; } str[i] = '\0'; // Inverte a string para colocar na ordem correta for (uint8_t j = 0, k = i - 1; j < k; j++, k--) { uint8_t temp = str[j]; str[j] = str[k]; str[k] = temp; } } /** * Converte um valor uint32_t para string hexadecimal, * escrevendo o resultado no buffer apontado por 'str'. * * @param value Valor a ser convertido (ex: 4276803469) * @param str Ponteiro para buffer de destino (mínimo 9 bytes: * 8 dígitos hex + terminador nulo) */ void Convert2Hex(uint32_t value, char *str) { const char hexTable[] = "0123456789ABCDEF"; for (int8_t i = 7; i >= 0; i--) { str[i] = hexTable[value & 0xF]; value >>= 4; } //str[8] = '\0'; } /* TIM3 Timer Interrupt */ void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim) { if (htim->Instance == TIM3) { g_ms_counter++; /* Relógio global do sistema */ } } /* 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 */