630 lines
17 KiB
C
630 lines
17 KiB
C
/* USER CODE BEGIN Header */
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/**
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******************************************************************************
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* @file : main.c
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* @brief : Main program body
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2026 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* USER CODE END Header */
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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#include "adc.h"
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#include "i2c.h"
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#include "tim.h"
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#include "usart.h"
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#include "gpio.h"
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/* Private includes ----------------------------------------------------------*/
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/* USER CODE BEGIN Includes */
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#include "ads1015_driver.h"
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#include "digital_outputs_driver.h"
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#include "ad5934_driver.h"
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#include "rs485_driver.h"
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#include "flash_manager.h"
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#include <string.h>
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/* USER CODE END Includes */
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/* Private typedef -----------------------------------------------------------*/
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/* USER CODE BEGIN PTD */
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/* USER CODE END PTD */
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/* Private define ------------------------------------------------------------*/
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/* USER CODE BEGIN PD */
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#define AVG_SLOPE (4.3F)
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#define V_AT_25C (1.43F)
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#define V_REF_INT (1.2F)
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#define STM32_TEMPERATURE_AVERAGES 4
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/* USER CODE END PD */
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/* Private macro -------------------------------------------------------------*/
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/* USER CODE BEGIN PM */
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/* USER CODE END PM */
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/* Private variables ---------------------------------------------------------*/
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/* USER CODE BEGIN PV */
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uint8_t rx_buffer[256]; /*!< Buffer for received data */
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uint8_t tx_data[] = "Hello RS-485 Broadcast!"; /*!< Data to send */
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uint8_t adc_text[6];
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uint8_t real_text[6];
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uint8_t imag_text[6];
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uint8_t rs485_text[6];
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uint8_t newline[]={'\r','\n'};
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uint8_t doubleSpace[]={'_','_','\0'};
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uint8_t newline_ph[]={'_','p','H','\n','\0'};
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uint8_t newline_admi[]={'_','u','S','\n','\0'};
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uint8_t newline_temp[]={' ','°','C','\n','\0'};
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uint8_t newline_imag[]={'_','O','h','m','\n','\0'};
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uint8_t newline_485[]={'_','a','d','\n','\0'};
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uint8_t minus[]={'-',' '};
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uint8_t ad_t[]={'A','d',':',' ','\0'};
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uint8_t ph_t[]={'p','H',':',' ','\0'};
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uint8_t tm_t[]={'T','M',':',' ','\0'};
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uint8_t main_state = STATE_RUNNING_OK;
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uint8_t rs485_address=0;
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uint16_t AD_RES[2];
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uint8_t UpdateEvent = 0;
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float Temperature, Temp_Sum, V_Sense, V_Ref;
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float Temp_Samples[STM32_TEMPERATURE_AVERAGES]={0};
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/* USER CODE END PV */
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/* Private function prototypes -----------------------------------------------*/
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void SystemClock_Config(void);
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/* USER CODE BEGIN PFP */
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void intToStr(int16_t N, uint8_t *str);
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void FloatToString(uint8_t * buf, double val);
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/* USER CODE END PFP */
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/* Private user code ---------------------------------------------------------*/
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/* USER CODE BEGIN 0 */
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/* USER CODE END 0 */
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/**
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* @brief The application entry point.
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* @retval int
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*/
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int main(void)
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{
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/* USER CODE BEGIN 1 */
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HAL_StatusTypeDef status0,status1;
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// Variables to store previous LED states
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uint8_t previous_green_state = 0;
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uint8_t previous_red_state = 0;
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uint8_t mux_connection = 0;
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// Variables for timing
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uint32_t previous_millis_green = 0;
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uint32_t previous_millis_red = 0;
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uint32_t current_millis;
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float temperature_RTD, admittance_EC, refResistance, update_value, ph7_interp, ph4_interp, ph_compensated;
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/*! Temporary variables */
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uint8_t tempString[15] = {0};
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uint8_t i;
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/* USER CODE END 1 */
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/* MCU Configuration--------------------------------------------------------*/
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/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
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HAL_Init();
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/* USER CODE BEGIN Init */
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/* USER CODE END Init */
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/* Configure the system clock */
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SystemClock_Config();
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/* USER CODE BEGIN SysInit */
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/* USER CODE END SysInit */
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/* Initialize all configured peripherals */
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MX_GPIO_Init();
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MX_ADC1_Init();
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MX_ADC2_Init();
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MX_I2C1_Init();
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MX_I2C2_Init();
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MX_USART1_UART_Init();
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MX_TIM3_Init();
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/* USER CODE BEGIN 2 */
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Flash_Load_Page(&flash_data);
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HAL_TIM_Base_Start_IT(&htim3);
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//TempSensor_Init(&hadc1);
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/*
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HAL_ADCEx_Calibration_Start(&hadc1);
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HAL_ADC_Start_DMA(&hadc1, (uint32_t*)AD_RES, 2); // Internal Temperature conversion
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*/
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digital_outputs_init();
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rs485_init();
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ADS1015_Init(); // Initializes pH Measurement
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AD5934_Init(); // Initializes CE and RTD Measurement
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/* USER CODE END 2 */
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/* Infinite loop */
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/* USER CODE BEGIN WHILE */
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/*
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for(i=0;i<AD5934_TEMP_AVERAGES;i++) // Loop to get stability and get averages
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{
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refResistance = AD5934_Get_Ref_Resistance(); // On Board Resistor
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temperature_RTD = AD5934_GetTemperature(refResistance); // Liquid Temperature is stored
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admittance_EC = AD5934_GetImpedance(temperature_RTD);
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ph_compensated = ADSCalculate_ph_Compensated(temperature_RTD);
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}
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if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_3) == GPIO_PIN_RESET) // When PB3 (with internal pull up) in the Prog Header is set to GND
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{
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main_state = STATE_PH4_DRY_EC_CALIBRATION;
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HAL_GPIO_WritePin(GPIOB, GPIO_PIN_4, GPIO_PIN_SET);
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HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_RESET); // Red LED On
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for(i=0;i<(2*AD5934_TEMP_AVERAGES);i++) // Loop to get stability and get averages
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{
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flash_data.ph4_mV = ADSCalculate_ph_mV();
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temperature_RTD = AD5934_GetTemperature(refResistance); // Air Temperature is not used in the function
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flash_data.ec0_mag = AD5934_GetImpedance(temperature_RTD); // Dry Probe
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if(HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_6) == GPIO_PIN_SET)
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flash_data.EC10mS_EC5mS_switch = AD5934_CH_EC_HIGH_GAIN; // 5mS/cm option
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else
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flash_data.EC10mS_EC5mS_switch = AD5934_CH_EC_MID_GAIN; //10ms/cm option
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if(HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_7) == GPIO_PIN_SET)
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flash_data.PT100_PT1000_switch = AD5934_CH_RTD_LOW_GAIN; //PT100 option
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else
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flash_data.PT100_PT1000_switch = AD5934_CH_RTD_MID_GAIN; //PT1000 option
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}
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HAL_GPIO_WritePin(GPIOB, GPIO_PIN_4, GPIO_PIN_RESET); // Green LED On
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HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_SET);
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while(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_3) == GPIO_PIN_RESET);
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HAL_Delay(500);
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main_state = STATE_PH7_WET_EC_CALIBRATION;
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HAL_GPIO_WritePin(GPIOB, GPIO_PIN_4, GPIO_PIN_SET);
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HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_RESET); // Red LED On
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for(i=0;i<(2*AD5934_TEMP_AVERAGES);i++) // Loop to get stability and get averages
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{
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temperature_RTD = AD5934_GetTemperature(refResistance); // Liquid Temperature is stored
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flash_data.ec_factor = AD5934_EC_Calibrate_Temperature(temperature_RTD);
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flash_data.ph7_mV = ADSCalculate_ph_mV();
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flash_data.ec1413_mag = AD5934_GetImpedance(temperature_RTD)*flash_data.ec_factor; // Get the magnitude of the reference liquid and compensate it to 25ºC
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}
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ph7_interp = ADSinterpolate_ph(temperature_RTD,ADS1015_PH_7_BUFFER_ROW);
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ph4_interp = ADSinterpolate_ph(temperature_RTD,ADS1015_PH_4_BUFFER_ROW);
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flash_data.ph_temperature = temperature_RTD;
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flash_data.ph_slope_mV = (flash_data.ph7_mV - flash_data.ph4_mV) / (ph7_interp - ph4_interp);
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flash_data.ph7_real = ph7_interp;
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Flash_Save_Page(&flash_data); // Store Calibration parameters in Flash
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HAL_Delay(500);
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HAL_GPIO_WritePin(GPIOB, GPIO_PIN_4, GPIO_PIN_RESET); // Green LED On
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HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_SET);
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main_state = STATE_RUNNING_OK;
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}
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*/
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while (1)
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{
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AD5934_Process_System();
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ADS1015_Process_System();
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current_millis = g_ms_counter;
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if((current_millis % 100) == 0) // Send data each 50ms
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{
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if (g_ref_filter.value_valid) // Reference Resistor on Board: 100 Ohms or 1000 Ohms
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{
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if(HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_7) == GPIO_PIN_SET) // OFF = PT1000, ON = PT100, PA7 has internal pull-up and switch connects to GND
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mux_connection = AD5934_CH_REF100R_LOW_GAIN; // 100 Ohms Reference Resistor
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else
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mux_connection = AD5934_CH_REF1K_MID_GAIN; // 1K Reference Resistor
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uint16_t reference_final = AD5934_REF_OUT_SCALE_MAX - AD5934_Compress_To_IntScale(g_ref_filter.filtered_value, mux_connection);
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intToStr(reference_final, tempString);
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// float ref_final = g_ref_filter.filtered_value;
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//FloatToString(tempString, ref_final);
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rs485_send_broadcast(tempString, (strlen((uint8_t*)tempString)));
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rs485_send_broadcast(newline, (strlen((uint8_t*)newline)));
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}
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if (g_ec_filter.value_valid) // EC
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{
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if(HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_6) == GPIO_PIN_SET) // Hardware Setup: Gain Selection (PA6)
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mux_connection = AD5934_CH_EC_HIGH_GAIN;
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else
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mux_connection = AD5934_CH_EC_MID_GAIN;
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uint16_t ec_final = AD5934_Compress_To_IntScale(g_ec_filter.filtered_value, mux_connection);
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intToStr(ec_final, tempString);
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/* float ec_final = g_ec_filter.filtered_value;
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FloatToString(tempString, ec_final);*/
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rs485_send_broadcast(tempString, (strlen((uint8_t*)tempString)));
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rs485_send_broadcast(newline, (strlen((uint8_t*)newline)));
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}
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if (g_rtd_filter.value_valid) // PT100 or PT1000 in °C
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{
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if(HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_7) == GPIO_PIN_SET) // OFF = PT1000, ON = PT100, PA7 has internal pull-up and switch connects to GND
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mux_connection = AD5934_CH_RTD_LOW_GAIN; //PT100
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else
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mux_connection = AD5934_CH_RTD_MID_GAIN; //PT1000
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uint16_t rtd_final = AD5934_RTD_OUT_SCALE_MAX - AD5934_Compress_To_IntScale(g_rtd_filter.filtered_value, mux_connection);
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intToStr(rtd_final, tempString);
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// float rtd_final = g_rtd_filter.filtered_value;
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// FloatToString(tempString, rtd_final);
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rs485_send_broadcast(tempString, (strlen((uint8_t*)tempString)));
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rs485_send_broadcast(newline, (strlen((uint8_t*)newline)));
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}
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if (g_ph_filter.value_valid) // pH
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{
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float ph_final = g_ph_filter.filtered_value;
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FloatToString(tempString, ph_final);
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rs485_send_broadcast(tempString, (strlen((uint8_t*)tempString)));
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rs485_send_broadcast(newline, (strlen((uint8_t*)newline)));
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}
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rs485_send_broadcast(newline, (strlen((uint8_t*)newline)));
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}
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// Piscar LED verde em PB5 a cada 0,5 segundos
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if ((current_millis - previous_millis_green) >= 500)
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{
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previous_millis_green = current_millis;
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HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_5);
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}
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// Piscar LED vermelho em PB4 a cada 1 segundo
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if ((current_millis - previous_millis_red) >= 1000)
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{
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previous_millis_red = current_millis;
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HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_4);
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}
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/*
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if(UpdateEvent) // Internal Temperature
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{
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for (i = (STM32_TEMPERATURE_AVERAGES-1); i > 0; i--)
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Temp_Samples[i] = Temp_Samples[i-1];
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// Read real and imaginary data
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if(AD_RES[0]>0.0f)
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V_Ref = (float)((V_REF_INT * 4095.0)/AD_RES[0]);
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else
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V_Ref = 0.0f;
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V_Sense = (float)(AD_RES[1] * V_Ref) / 4095.0;
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Temp_Samples[0] = (((V_AT_25C - V_Sense) * 1000.0) /AVG_SLOPE) + 25.0;
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for (i = 0, Temp_Sum=0; i < STM32_TEMPERATURE_AVERAGES; i++)
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Temp_Sum += Temp_Samples[i];
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Temperature = Temp_Sum/((float)STM32_TEMPERATURE_AVERAGES);
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UpdateEvent = 0;
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}
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*/
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}
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/* USER CODE END WHILE */
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/* USER CODE BEGIN 3 */
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/* USER CODE END 3 */
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}
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/**
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* @brief System Clock Configuration
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* @retval None
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*/
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void SystemClock_Config(void)
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{
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RCC_OscInitTypeDef RCC_OscInitStruct = {0};
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RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
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RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
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/** Initializes the RCC Oscillators according to the specified parameters
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* in the RCC_OscInitTypeDef structure.
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*/
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = RCC_HSE_ON;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
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if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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{
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Error_Handler();
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}
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/** Initializes the CPU, AHB and APB buses clocks
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*/
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RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
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|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSE;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
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{
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Error_Handler();
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}
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PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC;
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PeriphClkInit.AdcClockSelection = RCC_ADCPCLK2_DIV8;
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if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
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{
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Error_Handler();
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}
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}
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/* USER CODE BEGIN 4 */
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/***************************************************************************//**
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* @brief Converts a float value to a character array with 3 digits of accuracy.
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*
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* @param *buf - returns the converterd value
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* @param val - value to be converted
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*
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* @return None.
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*******************************************************************************/
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void FloatToString(uint8_t *buf, double val)
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{
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char temp[20]; // Buffer auxiliar para construção segura
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int i = 0;
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// 1. Tratar sinal negativo
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if (val < 0) {
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temp[i++] = '-';
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val = -val;
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}
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// 2. Separar parte inteira e fracionária
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long intPart = (long)val;
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// Multiplicamos por 1000 para obter 3 casas decimais fixas
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int fracPart = (int)((val - (double)intPart) * 1000.0 + 0.5);
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// 3. Converter a parte inteira para o buffer temp
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// Usamos um buffer temporário de inversão para não precisar de lógica complexa de ponteiro
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char intRev[12];
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int j = 0;
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if (intPart == 0) {
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intRev[j++] = '0';
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} else {
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while (intPart > 0) {
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intRev[j++] = (intPart % 10) + '0';
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intPart /= 10;
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}
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}
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// Inverter a parte inteira de volta para o buffer principal
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for (int k = j - 1; k >= 0; k--) {
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temp[i++] = intRev[k];
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}
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// 4. Adicionar o ponto decimal e a parte fracionária (sempre 3 casas)
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temp[i++] = '.';
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// Garantir que a parte fracionária tenha sempre 3 dígitos (ex: .005 em vez de .5)
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int fracBuffer[3];
|
|
fracBuffer[2] = fracPart % 10; // Unidade
|
|
fracBuffer[1] = (fracPart / 10) % 10; // Dezena
|
|
fracBuffer[0] = (fracPart / 100) % 10; // Centena
|
|
|
|
for (int k = 2; k >= 0; 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;
|
|
}
|
|
}
|
|
|
|
/* TIM3 Timer Interrupt */
|
|
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
|
|
{
|
|
if (htim->Instance == TIM3)
|
|
{
|
|
g_ms_counter++; /* Relógio global do sistema */
|
|
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
|
|
{
|
|
UpdateEvent = 1; // Internal TEmperature
|
|
}
|
|
*/
|
|
|
|
/* 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 */
|