I want to run the load cell sensor but I couldn't, I use my codes stm32f407 and HX711 like this, can you help me with this? I couldn't do the calibration because I can't get data.
include "main.h"
#include "stm32f4xx_hal.h"
extern TIM_HandleTypeDef htim2;
/* 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 */
/* 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);
static void MX_GPIO_Init(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
#define DT_PIN GPIO_PIN_8
#define DT_PORT GPIOB
#define SCK_PIN GPIO_PIN_9
#define SCK_PORT GPIOB
uint32_t dara = O;
float originalweight = 1; // in milli gram
float HX711weight = 1;
int weight;
void microDelay(uint16_t delay)
{
__HAL_TIM_SET_COUNTER(&htim2, 0);
while (__HAL_TIM_GET_COUNTER(&htim2) < delay);
}
int32_t getHX711(void)
{
uint32_t data = 0;
uint32_t startTime = HAL_GetTick();
for(int8_t len=0; len<24 ; len++)
{
HAL_GPIO_WritePin(SCK_PORT, SCK_PIN, GPIO_PIN_SET);
microDelay(1);
data = data << 1;
HAL_GPIO_WritePin(SCK_PORT, SCK_PIN, GPIO_PIN_RESET);
microDelay(1);
if(HAL_GPIO_ReadPin(DT_PORT, DT_PIN) == GPIO_PIN_SET)
data ++;
}
data = data ^ 0x800000;
HAL_GPIO_WritePin(SCK_PORT, SCK_PIN, GPIO_PIN_SET);
microDelay(1);
HAL_GPIO_WritePin(SCK_PORT, SCK_PIN, GPIO_PIN_RESET);
microDelay(1);
return data;
}
int weigh()
{
int32_t total = 0;
int32_t samples = 100;
int milligram;
float coefficient;
for(uint16_t i=0 ; i<samples ; i++)
{
total += getHX711();
}
int32_t average = (int32_t)(total / samples);
coefficient = originalweight / HX711weight;
milligram = (int)(average-dara)*coefficient;
return milligram;
}
/* 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 */
__HAL_RCC_TIM2_CLK_ENABLE();
htim2.Instance = TIM2;
htim2.Init.Prescaler = 0;
htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
htim2.Init.Period = 0;
htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
if (HAL_TIM_Base_Init(&htim2) != HAL_OK) {
Error_Handler();
}
/* 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();
/* USER CODE BEGIN 2 */
HAL_TIM_Base_Start(&htim2);
HAL_GPIO_WritePin(SCK_PORT, SCK_PIN, GPIO_PIN_SET);
HAL_Delay(10);
HAL_GPIO_WritePin(SCK_PORT, SCK_PIN, GPIO_PIN_RESET);
HAL_Delay(10);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
weight = weigh();
HAL_Delay(200);
// in milligram
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
