Solved
Rotary Encoder Application
I am using STM32F103C8T6 for counting rotary encoder pulse.
My Encoder PPR is 5000.
But when I program for timer1 as encoder mode and show count on segment it shows 20000 pulse per rotation it is 4 times higher than the actual value. What should I do to get exact value of pulses.???
And another question is how to get interrupt after particular no. of pulses??
I am sharing my code for reference.
*/*****************Timer Interrupt******************************/*
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(htim);
HAL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
/* NOTE : This function Should not be modified, when the callback is needed,
the __HAL_TIM_IC_CaptureCallback could be implemented in the user file
*/
}
*/*****************Main Function******************************/*
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_TIM1_Init();
MX_USART2_UART_Init();
/* USER CODE BEGIN 2 */
HAL_GPIO_WritePin(LED_GPIO_Port, LED_Pin,GPIO_PIN_RESET);
HAL_TIM_Base_Start_IT(&htim1);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
uint32_t temp;
uint16_t DG[6];
while (1)
{
/* USER CODE END WHILE */
temp = TIM1->CNT;
for(char i=0; i<6; i++)
{
DG[i] = temp%10;
temp = temp/10;
}
writeDisplayUP(DDG[DG[5]],DDG[DG[4]],DDG[DG[3]],DDG[DG[2]],DDG[DG[1]],DDG[DG[0]]);
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
*/*****************Timer as Encoder Mode Init******************************/*
static void MX_TIM1_Init(void)
{
/* USER CODE BEGIN TIM1_Init 0 */
/* USER CODE END TIM1_Init 0 */
TIM_Encoder_InitTypeDef sConfig = {0};
TIM_MasterConfigTypeDef sMasterConfig = {0};
/* USER CODE BEGIN TIM1_Init 1 */
/* USER CODE END TIM1_Init 1 */
htim1.Instance = TIM1;
htim1.Init.Prescaler = 0;
htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
htim1.Init.Period = 65535;
htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim1.Init.RepetitionCounter = 0;
htim1.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
sConfig.EncoderMode = TIM_ENCODERMODE_TI12;
sConfig.IC1Polarity = TIM_ICPOLARITY_FALLING;
sConfig.IC1Selection = TIM_ICSELECTION_DIRECTTI;
sConfig.IC1Prescaler = TIM_ICPSC_DIV1;
sConfig.IC1Filter = 5;
sConfig.IC2Polarity = TIM_ICPOLARITY_FALLING;
sConfig.IC2Selection = TIM_ICSELECTION_DIRECTTI;
sConfig.IC2Prescaler = TIM_ICPSC_DIV1;
sConfig.IC2Filter = 5;
if (HAL_TIM_Encoder_Init(&htim1, &sConfig) != HAL_OK)
{
Error_Handler();
}
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN TIM1_Init 2 */
/* USER CODE END TIM1_Init 2 */
}