Encoder interface

[tvv_it]

Posted on November 21, 2012 at 17:51

Hi everybody!

I have a problem when i reading data from ENCODER to stm32f103rc. My code is in the following:/*      */#include ''stm32f10x.h''#include <stdio.h>#include ''main.h''#include ''stm32f10x_it.h''#include ''stm32f10x_tim.h'' GPIO_InitTypeDef GPIO_InitStructure;/* *****************  */PUTCHAR_PROTOTYPE{ /* Place your implementation of fputc here */ /* e.g. write a character to the USART */ USART_SendData(USART1, (uint8_t) ch); /* Loop until the end of transmission */ while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET) {} return ch;}void Delay(__IO uint32_t num){ __IO uint32_t index = 0; /* default system clock is 72MHz */ for(index = (720000 * num); index != 0; index--) { }}void USART_Configuration(void){  // /* USARTx configured as follow:  //      - BaudRate = 115200 baud    //     - Word Length = 8 Bits  //    - One Stop Bit  //    - No parity  //   - Hardware flow control disabled (RTS and CTS signals)  //    - Receive and transmit enabled  USART_InitTypeDef USART_InitStructure; USART_InitStructure.USART_BaudRate = 115200; USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_StopBits = USART_StopBits_1; USART_InitStructure.USART_Parity = USART_Parity_No; USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; USART_ClearFlag(USART2,USART_FLAG_TC); /* USART configuration */ USART_Init(USART1, &USART_InitStructure); USART_ITConfig(USART1, USART_IT_TXE, ENABLE); //enable Receive Data register not empty interrupt USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); /* Enable USART */ USART_Cmd(USART1, ENABLE); }void RCC_Configuration(void){    /* Setup the microcontroller system. Initialize the Embedded Flash Interface,      initialize the PLL and update the SystemFrequency variable. */    //SystemInit();    /* Enable GPIOB clocks */    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOA, ENABLE);    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); }void Encoder(void){TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;//GPIO_InitTypeDef GPIO_InitStructure;//RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM2, ENABLE);TIM_TimeBaseStructure.TIM_Period = 0x0FFF;TIM_TimeBaseStructure.TIM_Prescaler = 0;TIM_TimeBaseStructure.TIM_ClockDivision = 0;TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;TIM_EncoderInterfaceConfig(TIM2,TIM_EncoderMode_TI1,TIM_ICPolarity_Falling,TIM_ICPolarity_Falling);TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);TIM_SetCounter(TIM2, 3200);TIM_Cmd(TIM2, ENABLE);}void GPIO_Configuaration(void){    /* Configure PA9 for USART Tx as alternate function push-pull */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); /* Configure PA10 for USART Rx as input floating */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); /* encoder config*/ GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0;    GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;    GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPU;    GPIO_Init(GPIOA, &GPIO_InitStructure);}int main(void){     uint16_t temp;    /* Configure the system clocks */    RCC_Configuration();        //Timer4_Configuration();    Encoder(); //GPIO_Remap_Configuration(); GPIO_Configuaration(); USART_Configuration();    while (1)    {        temp=TIM_GetCounter(TIM2);        printf(''Gia tri encoder: %d\n'',temp); Delay(5); }} #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 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) */ /* Infinite loop */ while (1) { }}#endif

[stst9184]

Posted on November 23, 2012 at 11:08

Encoder shall have two digital inputs, you've configured just one of them.

joee