Stm32cubemx Encoder (Using Timer) This post show how to get data from rotary encoder by using timer and send data to PC by usb-serial converter . Nucleo 144 board used. You can do the same with other board .
Encoder —————————– MCU
5V —————————– 5V
Gnd —————————– Gnd
A Phase —————————– PE_9
B Phase ——————————PE_11
1. Set pin out
1.1RCC->High speed clock->Crystal Ceramic Resonator
Up system clock to 216 Mhz
1.2 USART1->Mode->Asynchronous
1.3 Timer1 Combined channel -> Encoder Mode
2. Timer configuration
Counter period->65535
Encoder Mode ->Encoder Mode TI1 and TI2
3. USART1 configuration
Baudrate->115200
Word length-> 8bits
4. Source generation
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_USART1_UART_Init();
MX_TIM1_Init();
char buf[15];
HAL_TIM_Encoder_Start(&htim1, TIM_CHANNEL_1|TIM_CHANNEL_2);
uint16_t count=0;
while (1)
{
memset(buf,”,sizeof(buf));
count=TIM1->CNT;
sprintf(buf,”count:[%d]n”,count);
HAL_UART_Transmit(&huart1,buf,sizeof(buf),0x1000);
HAL_Delay(10);
}
}
